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Yu S, Peng G, Jiao J, Liu P, Li H, Xi J, Wu D. Chitin nanocrystals-stabilized emulsion as template for fabricating injectable suspension containing polylactide hollow microspheres. Carbohydr Polym 2024; 337:122176. [PMID: 38710562 DOI: 10.1016/j.carbpol.2024.122176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 04/15/2024] [Accepted: 04/16/2024] [Indexed: 05/08/2024]
Abstract
One of the promising applications of rod-like chitin nanocrystals (ChNCs) is the use as particle emulsifier to develop Pickering emulsions. We reported a ChNC-stabilized oil-in-water emulsion system, and developed a Pickering emulsion-templated method to prepare polylactide (PLA) hollow microspheres here. The results showed that both non-modified ChNCs and acetylated ChNCs could well emulsify the dichloromethane (DCM) solution of PLA-in-aqueous mannitol solution systems, forming very stable emulsions. At the same oil-to-water ratios and ChNC loadings, the emulsion stability was improved with increasing acetylation levels of ChNCs, accompanied by reduced size of droplets. Through the solvent evaporation, the PLA hollow microspheres were templated successfully, and the surface structure was also strongly dependent on the acetylation level of ChNCs. At a low level of acetylation, the single-hole or multi-hole surface structure formed, which was attributed to the out-diffusion of DCM caused by the solvent extraction and evaporation. These surface defects decreased with increased acetylation levels of ChNCs. Moreover, the aqueous suspension with as-obtained PLA microspheres revealed shear-thinning property and good biocompatibility, thereby had promising application as injectable fillers. This work can provide useful information around tuning surface structures of the Pickering emulsion-templated polymer hollow microspheres by regulating acetylation level of ChNCs.
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Affiliation(s)
- Sumin Yu
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu Province 225002, PR China
| | - Guangni Peng
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu Province 225002, PR China
| | - Jiali Jiao
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu Province 225002, PR China
| | - Peng Liu
- Shanghai Isiris Medical Co. Ltd., Shanghai 201400, PR China
| | - Huajun Li
- Medical College, Yangzhou University, Yangzhou, Jiangsu Province 225002, PR China
| | - Juqun Xi
- Medical College, Yangzhou University, Yangzhou, Jiangsu Province 225002, PR China
| | - Defeng Wu
- School of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu Province 225002, PR China.
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Yang F, Ye X, Zhong J, Lin Z, Wu S, Hu Y, Zheng W, Zhou W, Wei Y, Dong X. Recycling of waste crab shells into reinforced poly (lactic acid) biocomposites for 3D printing. Int J Biol Macromol 2023; 234:122974. [PMID: 36566808 DOI: 10.1016/j.ijbiomac.2022.12.193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 12/10/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
To promote natural waste resource utilization, a novel biocomposite, composed of waste crab shells and poly (lactic acid) matrix, was developed by combining chemical treatment and 3D printing. A crab shell powder (ISCSP) with an abundant porous structure and a high specific surface area was obtained by treatment with hydrochloric acid and sodium hydroxide. Importantly, under the optimal printing parameters determined by the finite element analysis, test samples, and porous bones were successfully printed using CSP/PLA composites by a commercial fused deposition modeling (FDM) 3D printer. The morphology, mechanical and thermal properties, antibacterial properties, and biocompatibility of the CSP/PLA composites were then assessed. Our results revealed that the tensile strength and flexural strength of the ISCSP/PLA composites reached 58.71 and 90.11 MPa, which were 28.6 % and 28.8 % higher than that of pure PLA, respectively. The glass transition and melting temperatures of the composites remained similar to those of pure PLA. Interestingly, the addition of CSP increased PLA crystallinity, which could be attributed to the nucleation effect of CSP in the system. The antibacterial activity of the PLA-1.5ESCSP composite samples against Escherichia coli (E. coli) was greater than 99 %. More importantly, the live/dead assay showed that the CSP/PLA composites possessed excellent biocompatibility. Therefore, the developed CSP/PLA biocomposites are potential feedstocks for 3D printing in bone tissue engineering and may be used as graft substitutes in reparative and reconstructive surgery. They are especially beneficial due to their superior mechanical and thermal properties, excellent antibacterial activities, and significant biocompatibility.
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Affiliation(s)
- Feiwen Yang
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, China
| | - Xinliang Ye
- School of Intelligent Manufacturing, Guangzhou Vocational College of Technology & Business, Guangzhou 511442, China
| | - Jing Zhong
- Department of Plastic and Aesthetic Surgery, Institute of Dermatology, Southern Medical University, Guangzhou 510091, China.
| | - Zhaowen Lin
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, China
| | - Shangjing Wu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, China
| | - Yang Hu
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, China
| | - Wenxu Zheng
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, China
| | - Wuyi Zhou
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, China.
| | - Yen Wei
- Department of Chemistry and Tsinghua Center for Frontier Polymer Research, Tsinghua University, Beijing 10084, China
| | - Xianming Dong
- Key Laboratory for Biobased Materials and Energy of Ministry of Education, College of Materials and Energy, Research Center of Biomass 3D Printing Materials, South China Agricultural University, Guangzhou 510642, China.
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Rosli NA, Karamanlioglu M, Kargarzadeh H, Ahmad I. Comprehensive exploration of natural degradation of poly(lactic acid) blends in various degradation media: A review. Int J Biol Macromol 2021; 187:732-741. [PMID: 34358596 DOI: 10.1016/j.ijbiomac.2021.07.196] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 07/22/2021] [Accepted: 07/30/2021] [Indexed: 11/25/2022]
Abstract
Poly(lactic acid) (PLA), a bio-based polyester, has been extensively investigated in the recent past owing to its excellent mechanical properties. Several studies have been conducted on PLA blends, with a focus on improving the brittleness of PLA to ensure its suitability for various applications. However, the increasing use of PLA has increased the contamination of PLA-based products in the environment because PLA remains intact even after three years at sea or in soil. This review focuses on analyzing studies that have worked on improving the degradation properties of PLA blends and studies how other additives affect degradation by considering different degradation media. Factors affecting the degradation properties, such as surface morphology, water uptake, and crystallinity of PLA blends, are highlighted. In natural, biotic, and abiotic media, water uptake plays a crucial role in determining biodegradation rates. Immiscible blends of PLA with other polymer matrices cause phase separation, increasing the water absorption. The susceptibility of PLA to hydrolytic and enzymatic degradation is high in the amorphous region because it can be easily penetrated by water. It is essential to study the morphology, water absorption, and structural properties of PLA blends to predict the biodegradation properties of PLA in the blends.
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Affiliation(s)
- Noor Afizah Rosli
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
| | - Mehlika Karamanlioglu
- Biomedical Engineering Department, Faculty of Engineering and Architecture, Istanbul Gelisim University, 34310, Istanbul, Turkey
| | - Hanieh Kargarzadeh
- Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza, 112, 90-363 Lodz, Poland
| | - Ishak Ahmad
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia.
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Lugoloobi I, Li X, Zhang Y, Mao Z, Wang B, Sui X, Feng X. Fabrication of lignin/poly(3-hydroxybutyrate) nanocomposites with enhanced properties via a Pickering emulsion approach. Int J Biol Macromol 2020; 165:3078-3087. [DOI: 10.1016/j.ijbiomac.2020.10.156] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 10/16/2020] [Accepted: 10/20/2020] [Indexed: 01/21/2023]
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