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Ma M, Xu L, Liu K, Chen S, He H, Shi Y, Wang X. Effect of triphenyl phosphite as a reactive compatibilizer on the properties of poly(
L
‐lactic acid)/poly(butylene succinate) blends. J Appl Polym Sci 2019. [DOI: 10.1002/app.48646] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Meng Ma
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Lin Xu
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Kai Liu
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Si Chen
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Huiwen He
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Yanqin Shi
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
| | - Xu Wang
- College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014 China
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Ma M, Liu K, Zheng H, Chen S, Wu B, Shi Y, Wang X. Effect of the composition and degree of crosslinking on the properties of poly( l
-lactic acid)/crosslinked polyurethane blends. POLYM INT 2018. [DOI: 10.1002/pi.5626] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Meng Ma
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou PR China
| | - Kai Liu
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou PR China
| | - Haiming Zheng
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou PR China
| | - Si Chen
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou PR China
| | - Bozhen Wu
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou PR China
| | - Yanqin Shi
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou PR China
| | - Xu Wang
- College of Materials Science and Engineering; Zhejiang University of Technology; Hangzhou PR China
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Song YN, Zhao QX, Yang SG, Ru JF, Lin JM, Xu JZ, Lei J, Li ZM. Flow-induced crystallization of polylactide stereocomplex under pressure. J Appl Polym Sci 2018. [DOI: 10.1002/app.46378] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ying-Nan Song
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Qing-Xiang Zhao
- College of Manufacturing Science and Engineering, Provincial Laboratory of CAD/CAM; Sichuan University; Chengdu 610065 China
| | - Shu-Gui Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Jia-Feng Ru
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Jian-Mei Lin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Jun Lei
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
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Yin HM, Qian J, Zhang J, Lin ZF, Li JS, Xu JZ, Li ZM. Engineering Porous Poly(lactic acid) Scaffolds with High Mechanical Performance via a Solid State Extrusion/Porogen Leaching Approach. Polymers (Basel) 2016; 8:E213. [PMID: 30979308 PMCID: PMC6432203 DOI: 10.3390/polym8060213] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/18/2016] [Accepted: 05/26/2016] [Indexed: 01/20/2023] Open
Abstract
A knotty issue concerning the poor mechanical properties exists in the porogen leaching approach to porous scaffolds, despite its advantage in tuning pore structure. To address this hurdle, solid state extrusion (SSE) combined with porogen leaching was utilized to engineer porous scaffolds of poly(lactic acid) (PLA). Advances introduced by poly(ethylene glycol) (PEG) caused the PLA ductile to be processed and, on the other hand, enabled the formation of interconnected pores. Thus, a well-interconnected porous architecture with high connectivity exceeding 97% and elevated porosity over 60% was obtained in the as-prepared PLA scaffolds with the composition of NaCl higher than 75.00 wt % and PEG beyond 1.25 wt %. More strikingly, the pore walls of macropores encompassed countless micropores and rough surface topography, in favor of transporting nutrients and metabolites as well as cell attachment. The prominent compressive modulus of the PLA scaffolds was in the range of 85.7⁻207.4 MPa, matching the normal modulus of human trabecular bone (50⁻250 MPa). By means of alkaline modification to improve hydrophilicity, biocompatible porous PLA scaffolds exhibited good cell attachment. These results suggest that the SSE/porogen leaching approach provides an eligible clue for fabricating porous scaffolds with high mechanical performance for use as artificial extracellular matrices.
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Affiliation(s)
- Hua-Mo Yin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jing Qian
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jin Zhang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Zai-Fu Lin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jian-Shu Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Jia-Zhuang Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
| | - Zhong-Ming Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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Loth R, Loth T, Schwabe K, Bernhardt R, Schulz-Siegmund M, Hacker MC. Highly adjustable biomaterial networks from three-armed biodegradable macromers. Acta Biomater 2015; 26:82-96. [PMID: 26277378 DOI: 10.1016/j.actbio.2015.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 07/30/2015] [Accepted: 08/11/2015] [Indexed: 12/01/2022]
Abstract
Biocompatible material platforms with adjustable properties and option for chemical modification are warranted for site-specific biomedical applications. To this end, three-armed biodegradable macromers of well-defined chemical characteristics were prepared from trivalent alcohols with different degrees of ethoxylation and different lengths of oligoester domains. A platform of 15 different macromers was established. The macromers were designed to exhibit different hydrophilicities and molecular weights and contained various types of oligoesters such as d,l-lactide, l-lactide and ε-caprolactone. Macromers chemical composition was determined and molecular weights ranged from 900 to 3000 Da. Thermally induced cross-linking of methacrylated macromers was monitored by oscillation rheology. A novel variant of the solid lipid templating technique was established to fabricate macroporous tissue engineering scaffolds from these macromers. Scaffold properties were thoroughly investigated regarding mechanical properties, compositional analysis including methacrylic double bond conversion, microstructure and porosity. Material properties could be controlled by macromer chemistry. By variation of the fabrication procedure and processing parameters scaffold porosity was increased up to 88%. Basic cytocompatibility was assessed including indirect and direct contact methods. The established macromers hold promise for various biomedical purposes. STATEMENT OF SIGNIFICANCE Specific biomedical applications require tailored biomaterials with defined properties. We established a macromer platform for preparation of tissue engineering scaffolds with adjustable chemical and mechanical characteristics. Macromers were composed of trivalent core alcohols with different degrees of ethoxylation to which biodegradable domains - lactide or ε-caprolactone - were oligomerized before final methacrylation. The solid lipid templating technique was adapted to fabricate macroporous scaffolds with controlled pore structure and porosity from the developed macromers, which can also be processed by solid freeform fabrication techniques. The material platform relies on clinically established chemistries of the biodegradable domains and the macromer concept enables the fabrication of networks in which cross-polymerization kinetics, mechanical properties and surface hydrophobicity is predefined by macromer chemistry. Cytocompatibility was confirmed by indirect and direct cell contact experiments.
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Affiliation(s)
- Rudi Loth
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Tina Loth
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Katharina Schwabe
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Ricardo Bernhardt
- Max-Bergmann-Center of Biomaterials, Dresden, University of Technology, Budapester Str. 27, D-01062 Dresden, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Michaela Schulz-Siegmund
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Michael C Hacker
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany.
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