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Kuram E, Karadeli HH. Fabrication of Shape Memory Polymer Endovascular Thrombectomy Device for Treating Ischemic Stroke. Macromol Rapid Commun 2024:e2400146. [PMID: 38704791 DOI: 10.1002/marc.202400146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/28/2024] [Indexed: 05/07/2024]
Abstract
Stroke is the second result for death and ischemic stroke constitutes most of all stroke cases. Ischemic stroke takes place when blood clot or embolus blocks cerebral vessel and interrupts blood flow, which often leads to brain damage, permanent disability, or death. There is a 4.5-h (golden hour) treatment window to restore blood flow prior to permanent neurological impairment results. Current stroke treatments consist mechanical system or thrombolytic drug therapy to disrupt or dissolve thrombus. Promising method for stroke treatment is mechanical retrieving of thrombi employing device deployed endovascularly. Advent of smart materials has led to research fabrication of several minimally invasive endovascular devices that take advantage of new materials capabilities. One of these capabilities is shape memory, is capability of material to store temporary form, then activate to primary shape as subjected to stimuli. Shape memory polymers (SMPs) are employed as good materials for thrombectomy device fabrication. Therefore, current review presents thrombectomy device development and fabrication with SMPs. Design, performance, limitations, and in vitro or in vivo clinical results of SMP-based thrombectomy devices are identified. Review also sheds light on SMP's future outlook and recommendations for thrombectomy device application, opening a new era for advanced materials in materials science.
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Affiliation(s)
- Emel Kuram
- Department of Mechanical Engineering, Gebze Technical University, Kocaeli, 41400, Turkey
| | - Hasan Hüseyin Karadeli
- Department of Neurology, Istanbul Medeniyet University Göztepe Prof. Dr. Süleyman Yalçın City Hospital, Istanbul, 34722, Turkey
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2
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Ledenko M, Toskich B, Mehner C, Ceylan H, Patel T. Therapeutic biliary stents: applications and opportunities. Expert Rev Med Devices 2024; 21:399-409. [PMID: 38716580 DOI: 10.1080/17434440.2024.2341960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Accepted: 04/08/2024] [Indexed: 05/31/2024]
Abstract
INTRODUCTION Biliary stents are used to optimize ductal patency and enable bile flow in the management of obstruction or injury related to biliary tract tumors, strictures, stones, or leaks. Although direct therapeutic applications of biliary stents are less well developed, stents can be used to deliver drugs, radioisotopes, and photodynamic therapy. AREAS COVERED This report provides an in-depth overview of the clinical indications, and therapeutic utility of biliary stents. Unique considerations for the design of biliary stents are described. The properties and functionalities of materials used for stents such as metal alloys, plastic polymers, or biodegradable materials are described, and opportunities for design of future stents are outlined. Current and potential applications of stents for therapeutic applications for biliary tract diseases are described. EXPERT OPINION Therapeutic biliary stents could be used to minimize inflammation, prevent stricture formation, reduce infections, or provide localized anti-cancer therapy for biliary tract cancers. Stents could be transformed into therapeutic platforms using advanced materials, 3D printing, nanotechnology, and artificial intelligence. Whilst clinical study and validation will be required for adoption, future advances in stent design and materials are expected to expand the use of therapeutic biliary stents for the treatment of biliary tract disorders.
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Affiliation(s)
- Matthew Ledenko
- Department of Transplantation, Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, FL, USA
| | - Beau Toskich
- Department of Radiology, Mayo Clinic, Jacksonville, FL, USA
| | - Christine Mehner
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Jacksonville, FL, USA
| | - Hakan Ceylan
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Jacksonville, FL, USA
| | - Tushar Patel
- Department of Transplantation, Division of Gastroenterology and Hepatology, Mayo Clinic, Jacksonville, FL, USA
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Jacksonville, FL, USA
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3
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Staszczak M, Urbański L, Cristea M, Ionita D, Pieczyska EA. Investigation of Shape Memory Polyurethane Properties in Cold Programming Process Towards Its Applications. Polymers (Basel) 2024; 16:219. [PMID: 38257020 PMCID: PMC10819366 DOI: 10.3390/polym16020219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/05/2024] [Accepted: 01/10/2024] [Indexed: 01/24/2024] Open
Abstract
Thermoresponsive shape memory polymers (SMPs) with the remarkable ability to remember a temporary shape and recover their original one using temperature have been gaining more and more attention in a wide range of applications. Traditionally, SMPs are investigated using a method named often "hot-programming", since they are heated above their glass transition temperature (Tg) and after that, reshaped and cooled below Tg to achieve and fix the desired configuration. Upon reheating, these materials return to their original shape. However, the heating of SMPs above their Tg during a thermomechanical cycle to trigger a change in their shape creates a temperature gradient within the material structure and causes significant thermal expansion of the polymer sample resulting in a reduction in its shape recovery property. These phenomena, in turn, limit the application fields of SMPs, in which fast actuation, dimensional stability and low thermal expansion coefficient are crucial. This paper aims at a comprehensive experimental investigation of thermoplastic polyurethane shape memory polymer (PU-SMP) using the cold programming approach, in which the deformation of the SMP into the programmed shape is conducted at temperatures below Tg. The PU-SMP glass transition temperature equals approximately 65 °C. Structural, mechanical and thermomechanical characterization was performed, and the results on the identification of functional properties of PU-SMPs in quite a large strain range beyond yield limit were obtained. The average shape fixity ratio of the PU-SMP at room temperature programming was found to be approximately 90%, while the average shape fixity ratio at 45 °C (Tg - 20 °C) was approximately 97%. Whereas, the average shape recovery ratio was 93% at room temperature programming and it was equal to approximately 90% at 45 °C. However, the results obtained using the traditional method, the so-called hot programming at 65 °C, indicate a higher shape fixity value of 98%, but a lower shape recovery of 90%. Thus, the obtained results confirmed good shape memory properties of the PU-SMPs at a large strain range at various temperatures. Furthermore, the experiments conducted at both temperatures below Tg demonstrated that cold programming can be successfully applied to PU-SMPs with a relatively high Tg. Knowledge of the PU-SMP shape memory and shape fixity properties, estimated without risk of material degradation, caused by heating above Tg, makes them attractive for various applications, e.g., in electronic components, aircraft or aerospace structures.
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Affiliation(s)
- Maria Staszczak
- Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106 Warsaw, Poland; (M.S.); (L.U.)
| | - Leszek Urbański
- Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106 Warsaw, Poland; (M.S.); (L.U.)
| | - Mariana Cristea
- “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania; (M.C.); (D.I.)
| | - Daniela Ionita
- “Petru Poni” Institute of Macromolecular Chemistry, 700487 Iasi, Romania; (M.C.); (D.I.)
| | - Elżbieta Alicja Pieczyska
- Institute of Fundamental Technological Research, Polish Academy of Sciences, 02-106 Warsaw, Poland; (M.S.); (L.U.)
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Su L, Jia Y, Fu L, Guo K, Xie S. The emerging progress on wound dressings and their application in clinic wound management. Heliyon 2023; 9:e22520. [PMID: 38076148 PMCID: PMC10709065 DOI: 10.1016/j.heliyon.2023.e22520] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 05/19/2024] Open
Abstract
BACKGROUND In addition to its barrier function, the skin plays a crucial role in maintaining the stability of the body's internal environment and normal physiological functions. When the skin is damaged, it is important to select proper dressings as temporary barriers to cover the wound, which can exert significant effects on defence against microbial infection, maintaining normal tissue/cell functions, and coordinating the process of wound repair and regeneration. It now forms an important approach in clinic practice to facilitate wound repair. SEARCH STRATEGIES We conducted a comprehensive literature search using online databases including PubMed, Web of Science, MEDLINE, ScienceDirect, Wiley Online Library, CNKI, and Wanfang Data. In addition, information was obtained from local and foreign books on biomaterials science and traumatology. RESULTS This review focuses on the efficacy and principles of functional dressings for anti-bacteria, anti-infection, anti-inflammation, anti-oxidation, hemostasis, and wound healing facilitation; and analyses the research progress of dressings carrying living cells such as fibroblasts, keratinocytes, skin appendage cells, and stem cells from different origins. We also summarize the recent advances in intelligent wound dressings with respect to real-time monitoring, automatic drug delivery, and precise adjustment according to the actual wound microenvironment. In addition, this review explores and compares the characteristics, advantages and disadvantages, mechanisms of actions, and application scopes of dressings made from different materials. CONCLUSION The real-time and dynamic acquisition and analysis of wound conditions are crucial for wound management and prognostic evaluation. Therefore, the development of modern dressings that integrate multiple functions, have high similarity to the skin, and are highly intelligent will be the focus of future research, which could drive efficient wound management and personalized medicine, and ultimately facilitate the translation of health monitoring into clinical practice.
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Affiliation(s)
- Linlin Su
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, 710032, China
| | - Yanhui Jia
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, 710032, China
| | - Lanqing Fu
- Department of Orthopedics, Wuchang Hospital Affiliated to Wuhan University of Science and Technology, Wuhan, Hubei, 430063, China
| | - Kai Guo
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, 710032, China
| | - Songtao Xie
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, 710032, China
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Muchlis AMG, Yang C, Tsai YT, Ummartyotin S, Lin CC. Multiresponsive Self-Healing Lanthanide Fluorescent Hydrogel for Smart Textiles. ACS APPLIED MATERIALS & INTERFACES 2023; 15:46085-46097. [PMID: 37732796 DOI: 10.1021/acsami.3c10662] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Lanthanide organometallic complexes exhibit strong luminescence characteristics, owing to their antenna effects. The f-d energy level transition causes this phenomenon, which occurs when ligands and the external electrons of lanthanide metals coordinate. Based on this phenomenon, we used two lanthanide metals, europium (Eu) and terbium (Tb), in the present study as the metal center for iminodiacetic acid ligands. Further, we developed the resulting fluorescent organometallic complex as a smart material. The ligand-metal bond in the material functioned as a metal chelating agent and a cross-linking agent in a dynamically coordinated form, thereby prompting the material to self-heal. Temperature-sensitive poly-N-isopropylacrylamide was incorporated into the material as the polymer backbone. Afterward, we combined it with water-soluble poly(vinyl alcohol) and an additional ligand from poly(acrylic acid) to fabricate a high-performance hydrogel composite material. The shrinkage and expansion of the polymer form a grid between the materials. Because of the different coordination stabilities of Eu3+ and Tb3+, the corresponding material exhibits environmental responses toward excitation wavelength, temperature, and pH, thus generating different colors. When used in fabrics, the cross-linking mechanism of the material effectively looped the material between fabric fibers; furthermore, the temperature sensitivity of the polymer adjusted the size of pores between fabric fibers. At relatively higher temperatures (>32 °C), the polymer structure shrank, fiber pores expanded, and air permeability improved. Thus, this material appears to be promising for use in smart textiles.
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Affiliation(s)
| | - Ching Yang
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106334, Taiwan
- Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 106334, Taiwan
| | - Yi-Ting Tsai
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106334, Taiwan
| | - Sarute Ummartyotin
- Department of Materials and Textile Technology, Faculty of Science and Technology, Thammasat University, Pathum Thani 12120, Thailand
- Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok 10330, Thailand
| | - Chun Che Lin
- Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106334, Taiwan
- Research and Development Center for Smart Textile Technology, National Taipei University of Technology, Taipei 106334, Taiwan
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Sikdar P, Dip TM, Dhar AK, Bhattacharjee M, Hoque MS, Ali SB. Polyurethane (
PU
) based multifunctional materials: Emerging paradigm for functional textiles, smart, and biomedical applications. J Appl Polym Sci 2022. [DOI: 10.1002/app.52832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Partha Sikdar
- Department of Textiles, Merchandising and Interiors University of Georgia Athens Georgia USA
| | | | - Avik K. Dhar
- Department of Textiles, Merchandising and Interiors University of Georgia Athens Georgia USA
| | | | - Md. Saiful Hoque
- Department of Human Ecology University of Alberta Edmonton Alberta Canada
- Department of Textile Engineering Daffodil International University 102 Shukrabad, Dhanmondi Dhaka Bangladesh
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Yusrizal AA, Abdullah TK, Ali ES, Ahmad S, Ahmad Zubir S. Enhanced thermal and tensile behaviour of MWCNT reinforced palm oil polyol based shape memory polyurethane. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103860] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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8
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Vadkerti B, Juhász A, Lakatos C, Zsuga M, Kéki S, Nagy L. Reactivity of multi-arm polyols towards isocyanates. NEW J CHEM 2022. [DOI: 10.1039/d2nj01103d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this research, the kinetics of the reaction of various polymer polyol crosslinking agents with phenyl isocyanate is reported.
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Affiliation(s)
- Bence Vadkerti
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
- Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Anett Juhász
- Doctoral School of Chemistry, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
- BorsodChem Zrt., Bólyai tér 1, H-3700 Kazincbarcika, Hungary
| | - Csilla Lakatos
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Miklós Zsuga
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Sándor Kéki
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
| | - Lajos Nagy
- Department of Applied Chemistry, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
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9
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Grzęda D, Węgrzyk G, Leszczyńska M, Szczepkowski L, Gloc M, Ryszkowska J. Viscoelastic Polyurethane Foams for Use as Auxiliary Materials in Orthopedics. MATERIALS 2021; 15:ma15010133. [PMID: 35009278 PMCID: PMC8746291 DOI: 10.3390/ma15010133] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/19/2021] [Accepted: 12/20/2021] [Indexed: 12/24/2022]
Abstract
One of the essential factors in prostheses is their fitting. To assemble a prosthesis with the residual limb, so-called liners are used. Liners used currently are criticized by users for their lack of comfort, causing excessive sweating and skin irritation. The objective of the work was to develop viscoelastic polyurethane foams for use in limb prostheses. As part of the work, foams were produced with different isocyanate indexes (0.6–0.9) and water content (1, 2 and 3 php). The produced foams were characterized by scanning electron microscopy, computer microtomography, infrared spectroscopy, thermogravimetry and differential scanning calorimetry. Measurements also included apparent density, recovery time, rebound elasticity, permanent deformation, compressive stress value and sweat absorption. The results were discussed in the context of modifying the foam recipe. The performance properties of the foams, such as recovery time, hardness, resilience and sweat absorption, indicate that foams that will be suitable for prosthetic applications are foams with a water content of 2 php produced with an isocyanate index of 0.8 and 0.9.
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10
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Gupta A, Mekonnen TH. Cellulose nanocrystals enabled sustainable polycaprolactone based shape memory polyurethane bionanocomposites. J Colloid Interface Sci 2021; 611:726-738. [PMID: 34876266 DOI: 10.1016/j.jcis.2021.11.174] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/22/2021] [Accepted: 11/27/2021] [Indexed: 10/19/2022]
Abstract
In recent years, shape memory polyurethanes have gained substantial attention and are targeted for a range of smart and functional materials. In this work, the development of nanocrystalline celluloses (CNCs) enabled polycaprolactone-based shape memory polyurethane biocomposite using an in situ one-pot reactions is reported. The incorporation of up to 10 wt% CNCs resulted in a remarkable enhancement in the tensile strength at yield (from 0.2 MPa to 7.2 MPa), tensile strength at break (167% improvement), and modulus of elasticity (from 3.5 to 139.3 MPa) while maintaining the elongation at break. This was attributed to the simultaneous action of CNCs as a nucleating agent for crystallization and highly compatibilized reinforcing agent of the network. Moreover, the in situ incorporation of CNCs enhanced the shape memory capability of polyurethanes, which enables its employment in functional material applications, such as the biomedical sector. The intimate interfacial adhesion between the CNCs and the polymer matrix, which promoted shape fixating and recovery, was confirmed by fractured surface morphology studies. Rheology characterizations provided strong evidence that the addition of CNCs increased the shape fixity attributed to the stiffness of CNCs below the glass transition temperature (Tg) compared to the neat PU in conjuncture with the higher Tg of CNCs. Overall, the developed polymer nanocomposites are appealing materials for biomedical applications.
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Affiliation(s)
- Arvind Gupta
- Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada
| | - Tizazu H Mekonnen
- Department of Chemical Engineering, University of Waterloo, Waterloo, ON, Canada; Institute of Polymer Research, University of Waterloo, Waterloo, ON, Canada; Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON, Canada.
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11
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Zhang Z, Jiang Z, Wu Y, Yan Y, Chen W, Zeng Y. Comparing the Interface pressure distribution of the full body chest-lumbar cushion made of memory cotton with the traditional chest cushion. BMC Musculoskelet Disord 2021; 22:839. [PMID: 34592978 PMCID: PMC8485509 DOI: 10.1186/s12891-021-04668-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 08/23/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pressure injuries are common complications occurred duration hospitalization, whether the interface pressure distribution in full body memory cotton chest-lumbar cushion was superior than traditional chest cushion remains unclear. PURPOSE This study aimed to compare the effects that the full body memory cotton chest-lumbar cushion versus traditional chest cushion on interface pressure. METHODS A total of 66 healthy individuals were recruited. The volunteers were placed in the left lateral position and left armpit and iliac spine pressure and level of comfort were measured. Group differences were assessed using the paired t-test or Wilcoxon test according to data distribution. Additionally, multivariate regression analysis was applied to determine the potential role of sex, age, and body mass index on left armpit and iliac spine pressure and overall comfort. RESULTS Compared with the traditional chest cushion, we noted that the full body chest-lumbar cushion made of memory cotton was associated with less pressure on the left armpit (38.17 ± 10.39 mmHg vs. 67.93 ± 14.67 mmHg, respectively; P < 0.0001) and iliac spine (43.32 ± 13.70 mmHg vs. 50.77 ± 20.94 mmHg, respectively; P = 0.0004). Moreover, we noted that the overall comfort with the memory cotton chest-lumbar cushion was higher than that with the traditional chest cushion (8.48 ± 1.08 vs. 6.36 ± 1.45, respectively; P < 0.0001). Finally, the multivariate regression analyses found iliac spine pressure could affect by sex (P = 0.0377) and body mass index (P = 0.0380). CONCLUSIONS The full body chest-lumbar cushion made of memory cotton had beneficial effects on left armpit and iliac spine pressure and on comfort. These findings should be applied to future clinical practice.
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Affiliation(s)
- Zhiwei Zhang
- Department of Operating Room, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhiqun Jiang
- Department of Neurosurgery, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Ying Wu
- Department of Operating Room, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yu Yan
- Department of Operating Room, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Weiqiang Chen
- Department of Operating Room, The First Affiliated Hospital of Nanchang University, Nanchang, China
| | - Yu Zeng
- Department of Operating Room, The First Affiliated Hospital of Nanchang University, Nanchang, China.
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Liu LY, Karaaslan MA, Hua Q, Cho M, Chen S, Renneckar S. Thermo-Responsive Shape-Memory Polyurethane Foams from Renewable Lignin Resources with Tunable Structures–Properties and Enhanced Temperature Resistance. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01717] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Li-Yang Liu
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Muzaffer A. Karaaslan
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Qi Hua
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - MiJung Cho
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Siwei Chen
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Scott Renneckar
- Advanced Renewable Materials Lab, Faculty of Forestry, The University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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Taung Mai LL, Aung MM, Muhamad Saidi SA, H’ng PS, Rayung M, Jaafar AM. Non Edible Oil-Based Epoxy Resins from Jatropha Oil and Their Shape Memory Behaviors. Polymers (Basel) 2021; 13:polym13132177. [PMID: 34209121 PMCID: PMC8271732 DOI: 10.3390/polym13132177] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/19/2021] [Accepted: 05/19/2021] [Indexed: 12/03/2022] Open
Abstract
The use of bio-based polymers in place of conventional polymers gives positives effects in the sense of reduction of environmental impacts and the offsetting of petroleum consumption. As such, in this study, jatropha oil was used to prepare epoxidized jatropha oil (EJO) by the epoxidation method. The EJO was used to prepare a shape memory polymer (SMP) by mixing it with the curing agent 4-methylhexahydrophthalic anhydride (MHPA) and a tetraethylammonium bromide (TEAB) catalyst. The resulting bio-based polymer is slightly transparent and brown in color. It has soft and flexible properties resulting from the aliphatic chain in jatropha oil. The functionality of SMP was analyzed by Fourier transform infrared (FTIR) spectroscopy analysis. The thermal behavior of the SMP was measured by thermogravimetric analysis (TGA), and it showed that the samples were thermally stable up to 150 °C. Moreover, the glass transition temperature characteristic was obtained using differential scanning calorimetry (DSC) analysis. The shape memory recovery behavior was investigated. Overall, EJO/MHPA was prepared by a relatively simple method and showed good shape recovery properties.
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Affiliation(s)
- Lu Lu Taung Mai
- Higher Education Centre of Excellence (HiCoE), Institute of Tropical Forestry and Forest Products, University Putra Malaysia, Serdang 43400, Malaysia; (L.L.T.M.); (M.R.)
- Department of Chemistry, Universiry of Myitkyina, Kachine State 01011, Myanmar
| | - Min Min Aung
- Higher Education Centre of Excellence (HiCoE), Institute of Tropical Forestry and Forest Products, University Putra Malaysia, Serdang 43400, Malaysia; (L.L.T.M.); (M.R.)
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (S.A.M.S.); (A.M.J.)
- Chemistry Division, Centre of Foundation Studies for Agricultural Science, University Putra Malaysia, Serdang 43400, Malaysia
- Correspondence: (M.M.A.); (P.S.H.)
| | - Sarah Anis Muhamad Saidi
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (S.A.M.S.); (A.M.J.)
| | - Paik San H’ng
- Higher Education Centre of Excellence (HiCoE), Institute of Tropical Forestry and Forest Products, University Putra Malaysia, Serdang 43400, Malaysia; (L.L.T.M.); (M.R.)
- Department of Forestry and Environment, Faculty of Forestry, Universiti Putra Malaysia, Serdang 43400, Malaysia
- Correspondence: (M.M.A.); (P.S.H.)
| | - Marwah Rayung
- Higher Education Centre of Excellence (HiCoE), Institute of Tropical Forestry and Forest Products, University Putra Malaysia, Serdang 43400, Malaysia; (L.L.T.M.); (M.R.)
| | - Adila Mohamad Jaafar
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang 43400, Malaysia; (S.A.M.S.); (A.M.J.)
- Chemistry Division, Centre of Foundation Studies for Agricultural Science, University Putra Malaysia, Serdang 43400, Malaysia
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Pragya A, Mutalik S, Younas MW, Pang SK, So PK, Wang F, Zheng Z, Noor N. Dynamic cross-linking of an alginate-acrylamide tough hydrogel system: time-resolved in situ mapping of gel self-assembly. RSC Adv 2021; 11:10710-10726. [PMID: 35423570 PMCID: PMC8695775 DOI: 10.1039/d0ra09210j] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 03/03/2021] [Indexed: 12/11/2022] Open
Abstract
Hydrogels are a popular class of biomaterial that are used in a number of commercial applications (e.g.; contact lenses, drug delivery, and prophylactics). Alginate-based tough hydrogel systems, interpenetrated with acrylamide, reportedly form both ionic and covalent cross-links, giving rise to their remarkable mechanical properties. In this work, we explore the nature, onset and extent of such hybrid bonding interactions between the complementary networks in a model double-network alginate-acrylamide system, using a host of characterisation techniques (e.g.; FTIR, Raman, UV-vis, and fluorescence spectroscopies), in a time-resolved manner. Further, due to the similarity of bonding effects across many such complementary, interpenetrating hydrogel networks, the broad bonding interactions and mechanisms observed during gelation in this model system, are thought to be commonly replicated across alginate-based and broader double-network hydrogels, where both physical and chemical bonding effects are present. Analytical techniques followed real-time bond formation, environmental changes and re-organisational processes that occurred. Experiments broadly identified two phases of reaction; phase I where covalent interaction and physical entanglements predominate, and; phase II where ionic cross-linking effects are dominant. Contrary to past reports, ionic cross-linking occurred more favourably via mannuronate blocks of the alginate chain, initially. Evolution of such bonding interactions was also correlated with the developing tensile and compressive properties. These structure-property findings provide mechanistic insights and future synthetic intervention routes to manipulate the chemo-physico-mechanical properties of dynamically-forming tough hydrogel structures according to need (i.e.; durability, biocompatibility, adhesion, etc.), allowing expansion to a broader range of more physically and/or environmentally demanding biomaterials applications.
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Affiliation(s)
- Akanksha Pragya
- The Hong Kong Polytechnic University, Institute of Textiles and Clothing, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR China
| | - Suhas Mutalik
- The Hong Kong Polytechnic University, Institute of Textiles and Clothing, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR China
| | - Muhammad Waseem Younas
- The Hong Kong Polytechnic University, Institute of Textiles and Clothing, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR China
| | - Siu-Kwong Pang
- The Hong Kong Polytechnic University, Institute of Textiles and Clothing, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR China
| | - Pui-Kin So
- The Hong Kong Polytechnic University, University Research Facility in Life Sciences Hung Hom Kowloon Hong Kong SAR China
| | - Faming Wang
- The Hong Kong Polytechnic University, University Research Facility in Life Sciences Hung Hom Kowloon Hong Kong SAR China
- Central South University, School of Architecture and Art Changsha China
| | - Zijian Zheng
- The Hong Kong Polytechnic University, Institute of Textiles and Clothing, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR China
| | - Nuruzzaman Noor
- The Hong Kong Polytechnic University, Institute of Textiles and Clothing, Materials Synthesis and Processing Lab Hung Hom Kowloon Hong Kong SAR China
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15
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Luo Q, Chen J, Gnanasekar P, Ma X, Qin D, Na H, Zhu J, Yan N. A facile preparation strategy of polycaprolactone (PCL)-based biodegradable polyurethane elastomer with a highly efficient shape memory effect. NEW J CHEM 2020. [DOI: 10.1039/c9nj05189a] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A polycaprolactone (PCL)-based biodegradable polyurethane elastomer with a highly efficient shape memory effect.
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Affiliation(s)
- Qing Luo
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo
- P. R. China
| | - Jing Chen
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo
- P. R. China
| | | | - Xiaozhen Ma
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo
- P. R. China
| | - Dongdong Qin
- School of Chemical Engineering & Technology
- Tianjin University
- Tianjin 300350
- P. R. China
| | - Haining Na
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo
- P. R. China
| | - Jin Zhu
- Key Laboratory of Bio-based Polymeric Materials Technology and Application of Zhejiang Province
- Ningbo Institute of Materials Technology and Engineering
- Chinese Academy of Sciences
- Ningbo
- P. R. China
| | - Ning Yan
- Department of Chemical Engineering and Applied Chemistry
- University of Toronto
- Canada
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