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Sun J, Wang R, Xue G, Qiao G. Ultra-Fast Preparation of High-Strength Polymer Concrete via Frontal Polymerization at Room Temperature. SMALL METHODS 2024:e2301569. [PMID: 38655825 DOI: 10.1002/smtd.202301569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Revised: 04/10/2024] [Indexed: 04/26/2024]
Abstract
Concrete, in particular application scenarios, such as crack repair, disaster rescue and relief, and 3D printing, needs to be cured quickly. In this work, a novel synthesis strategy, UV-initiated frontal polymerization (FP), for fast preparation of high-strength polymer concrete at room temperature is proposed, and the whole fabrication progress within several minutes, in which coarse aggregates and a small amount of short carbon fibers (CF) are used to enhance mechanical properties and heat conduction and reduce the amounts of chemical adhesives. SEM, DSC, MIP, Ultra depth of field microscope, and Rheometer are employed to characterize the properties of chemical adhesives, polymer concrete, and polymerization process. In addition, the finite element method is used to investigate the internal temperature field status of the FP process. The results indicate that the compressive and flexural strengths of the polymer concrete with 1.0 wt%-1 mm-CF-50 vol.%-quartz sand exceeded 70 and 20 MPa, respectively, in which the average self-propagation velocity reached 58 mm min-1. The investigation provides a promising approach for the rapid construction of structural facilities, emergency repair after disasters, 3D printing concrete, etc.
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Affiliation(s)
- Jiongfeng Sun
- School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China
| | - Rui Wang
- School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China
| | - Guangjie Xue
- School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China
| | - Guofu Qiao
- School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China
- Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, 150090, China
- Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin, 150090, China
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Mohan A, Santhamoorthy M, Phan TTV, Kim SC. pNIPAm-Based pH and Thermoresponsive Copolymer Hydrogel for Hydrophobic and Hydrophilic Drug Delivery. Gels 2024; 10:184. [PMID: 38534602 DOI: 10.3390/gels10030184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/01/2024] [Accepted: 03/05/2024] [Indexed: 03/28/2024] Open
Abstract
The regulated and targeted administration of hydrophobic and hydrophilic drugs is both promising and challenging in the field of drug delivery. Developing a hydrogel which is responsive to dual stimuli is considered a promising and exciting research area of study. In this work, melamine functionalized poly-N-isopropyl acrylamide-co-glycidyl methacrylate copolymer has been developed by copolymerizing glycidyl methacrylate (GMA) monomer with N-isopropyl acrylamide (NIPAm) and further functionalized with melamine units (pNIPAm-co-pGMA-Mela). The prepared pNIPAm-co-pGMA-Mela copolymer hydrogel was characterized using various characterization techniques, including 1H NMR, FTIR, SEM, zeta potential, and particle size analysis. A hydrophobic drug (ibuprofen, Ibu) and hydrophilic drug (5-fluorouracil, 5-Fu) were selected as model drugs. Dual pH and temperature stimuli-responsive drug release behavior of the pNIPAm-co-pGMA-Mela hydrogel was evaluated under different pH (pH 7.4 and 4.0) and temperature (25 °C, 37 °C, and 45 °C) conditions. Furthermore, the in vitro biocompatibility of the developed pNIPAm-co-pGMA-Mela copolymer hydrogel was determined on MDA-MB-231 cells. The pH and temperature-responsive drug delivery study results reveal that the pNIPAm-co-pGMA-Mela hydrogel system is responsive to both pH and temperature stimuli and exhibits about ~100% of Ibu and 5-Fu, respectively, released at pH 4.0/45 °C. Moreover, the MTT assay and hemocompatibility analysis results proved that the pNIPAm-co-pGMA-Mela hydrogel system is biocompatible and hemocompatible, suggesting that that it could be used for drug delivery applications. The experimental results suggest that the proposed pNIPAm-co-pGMA-Mela hydrogel system is responsive to dual pH and temperature stimuli, and could be a promising drug carrier system for both hydrophilic and hydrophobic drug delivery applications.
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Affiliation(s)
- Anandhu Mohan
- Department of Nano Science and Technology Convergence, General Graduate School, Gachon University, 1342 Seongnam-Daero, Sujeong-gu, Seongnam-si 13120, Gyeonggi-do, Republic of Korea
| | - Madhappan Santhamoorthy
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Republic of Korea
| | - Thi Tuong Vy Phan
- Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, 03 Quang Trung, Hai Chau, Danang 550000, Vietnam
- Faculty of Environmental and Chemical Engineering, Duy Tan University, 03 Quang Trung, Hai Chau, Danang 550000, Vietnam
| | - Seong-Cheol Kim
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38541, Gyeongbuk, Republic of Korea
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Liu T, Liao X, Lin X, Yu J, Qi H, Jiang Z, Zou J, Li Q. Influencing pathways and toxicity changes of pre-ozonation on carcinogenic NDEA formation from greenhouse gas adsorbent DEAPA in subsequent disinfection processes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 873:162355. [PMID: 36822419 DOI: 10.1016/j.scitotenv.2023.162355] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/13/2023] [Accepted: 02/16/2023] [Indexed: 06/18/2023]
Abstract
This study was to evaluate the feasibility of controlling carcinogenic nitrosodiethylamine (NDEA) formation from greenhouse gas adsorbent 3-diethylaminopropylamine (DEAPA) by pre-O3 in subsequent chlorination/chloramination processes. The result indicated that the NDEA yields (0.4 %) during chlorination was 1.3 times of that during chloramination (0.3 %); pre-oxidation with 4 mg/L O3 significantly cut down its formation; the reduction rates were up to 67.5 and 48.5 %, respectively. OH scavenger greatly augmented the final NDEA amount from 1.86 to 5.05 μg/L during ozonation, while its roles on subsequent processes differed with disinfection methods as well as O3(g) dosages. Most of co-existed substances inhibited NDEA generation, except NO2-, CO32- and SO42-, which slightly promoted during ozonation. Basing on Gaussian calculation, GC/MS and UPLC-Q-TOF-MS analysis, the influencing mechanisms of pre-O3 on NDEA formation in subsequent disinfection processes were proposed. In addition, the calculated toxicity analysis as well as the whole toxicity was applied to evaluate the possibility of pre-O3 on risk control.
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Affiliation(s)
- Tianze Liu
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Fujian 361021, China
| | - Xiaobin Liao
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Fujian 361021, China.
| | - Xinna Lin
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Fujian 361021, China
| | - Jing Yu
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Fujian 361021, China
| | - Huan Qi
- College of Textiles and Appearl, Quanzhou Normal University, Fujian 362002, China
| | - Zhibin Jiang
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Fujian 361021, China
| | - Jing Zou
- Institute of Municipal and Environmental Engineering, College of Civil Engineering, Huaqiao University, Fujian 361021, China
| | - Qingsong Li
- Water Resources and Environmental Institute, Xiamen University of Technology, Xiamen, Fujian 361005, China
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Baruel AF, Dutra RCL, Diniz MF, Azevedo MFP, Cassu SN. The role of organoclay in the diffusion of epoxy‐amine oligomers and in the cross‐linking density of the resulting network. J Appl Polym Sci 2022. [DOI: 10.1002/app.53571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Amanda F. Baruel
- Instituto Tecnológico de Aeronáutica (ITA) São José dos Campos SP Brazil
- Instituto de Aeronáutica e Espaço (IAE) São José dos Campos SP Brazil
| | - Rita C. L. Dutra
- Instituto Tecnológico de Aeronáutica (ITA) São José dos Campos SP Brazil
| | - Milton F. Diniz
- Instituto de Aeronáutica e Espaço (IAE) São José dos Campos SP Brazil
| | | | - Silvana N. Cassu
- Instituto Tecnológico de Aeronáutica (ITA) São José dos Campos SP Brazil
- Instituto de Aeronáutica e Espaço (IAE) São José dos Campos SP Brazil
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Cao Q, Li J, Qi Y, Zhang S, Wang J, Wei Z, Pang H, Jian X, Weng Z. Engineering Double Load-Sharing Network in Thermosetting: Much More than Just Toughening. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qi Cao
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
| | - Jiahui Li
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
| | - Yu Qi
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
| | - Shouhai Zhang
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
| | - Jinyan Wang
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
| | - Zhiyong Wei
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
| | - Hongchang Pang
- School of Chemical Engineering, Dalian University of Technology, Dalian116024, China
| | - Xigao Jian
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
| | - Zhihuan Weng
- State Key Laboratory of Fine Chemicals, Liaoning High Performance Resin Engineering Research Center, Department of Polymer Science & Engineering, Dalian University of Technology, Dalian116024, China
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Bannister C, Guy A, Mihaylova R, Orgill J, Burg SL, Parnell A, Thompson RL. The influence of ambient cure chemistry and stoichiometry on epoxy coating surfaces. RSC Adv 2022; 12:28746-28754. [PMID: 36320514 PMCID: PMC9549571 DOI: 10.1039/d2ra05067f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Accepted: 09/26/2022] [Indexed: 11/12/2022] Open
Abstract
The surface properties of epoxy resin coatings influence their function as substrates for subsequent coats. Variation in ambient cure conditions (temperature and relative humidity, RH), stoichiometry (ratio of epoxy: amine) and delay time between epoxy component mixing and film casting ("induction time") significantly altered the surface properties of ambient cured epoxy resin coatings (Dow Epoxy Novolac D.E.N. 431, resorcinol diglycidyl ether and 4,4-diaminodicyclohexylmethane). Gravimetric analysis showed that increasing induction time significantly reduced surface layer formation (carbamation) of cured epoxy resin coatings at 80% RH but had no measurable effect at 40% RH and below. RMS surface roughness increased with increasing RH and decreased with increasing induction time and ambient cure temperature, at two stoichiometric extremes. However, the net change in surface area arising from these conditions was not sufficient to significantly alter the equilibrium contact angles or wetting regime. We conclude that the observed significant variation in surface wettability was more likely to depend on variation in surface chemistry than roughness; stoichiometry was the variable which most significantly influenced surface wettability, average void volume and fractional free volume, while cure temperature significantly influenced the extent of cure at both stoichiometries. Off-stoichiometry formulation and elevated ambient cure temperature significantly increased system average void volume while fractional free volume decreased, which may be significant for the barrier properties of the final coating.
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Affiliation(s)
| | | | | | - Joseph Orgill
- Department of Physics and Astronomy, University of SheffieldUK
| | | | - Andrew Parnell
- Department of Physics and Astronomy, University of SheffieldUK
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Gaglieri C, Alarcon RT, Magri R, North M, Bannach G. Development of renewable thermosetting polymers based on grape seed oil derivatives. J Appl Polym Sci 2022. [DOI: 10.1002/app.52990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Caroline Gaglieri
- School of Sciences, Chemistry Department UNESP ‐ São Paulo State University Bauru Brazil
| | - Rafael Turra Alarcon
- School of Sciences, Chemistry Department UNESP ‐ São Paulo State University Bauru Brazil
| | - Raquel Magri
- School of Sciences, Chemistry Department UNESP ‐ São Paulo State University Bauru Brazil
| | - Michael North
- Green Chemistry Centre of Excellence, Department of Chemistry The University of York York UK
| | - Gilbert Bannach
- School of Sciences, Chemistry Department UNESP ‐ São Paulo State University Bauru Brazil
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