| 微生物合成的β-羟基丁酸酯与β-羟基己酸酯共聚物/聚乳酸共混材料(PHBHHx/PLA)的力学性能与生物降解性研究 |
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| 作者单位： | 南开大学生命科学学院微生物学系 生物活性材料教育部重点实验室，南开大学生命科学学院微生物学系，生物活性材料教育部重点实验室，南开大学高分子化学研究所，功能高分子材料教育部重点实验室，天津大学材料学院，南开大学高分子化学研究所，功能高分子材料教育部重点实验室，天津大学材料学院，天津大学材料学院，南开大学生命科学学院微生物学系，生物活性材料教育部重点实验室，南开大学高分子化学研究所，功能高分子材料教育部重点实验室，天津300071，天津300071，天津300071，天津300072，天津300071，天津300072，天津300072，天津300071，天津300071 |
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| 摘 要： | 通过熔融共混法制备了聚乳酸/微生物产β-羟基丁酸酯与β-羟基己酸共聚物的共混物(PLA/PHBHHx)。采用拉伸力学试验研究了共混物的力学性能。通过土壤悬浊培养降解法和扫描电子显微镜(SEM)分析对共混材料的生物降解性能进行了研究。实验结果表明,随着PHBHHx含量的增加,共混物的拉伸强度和杨氏模量降低,而生物降解速率却显著提高。但是,在175h之前,重量组成比为20/80的共混物降解速率比纯PHBHHx还要快。综合分析表明,共混材料PLA/PHBHHx的重量比为20/80时,具有优良的力学性能和生物降解性。
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| 关 键 词： | 力学性能 生物降解性 聚乳酸(PLA) β-羟基丁酸酯与β-羟基己酸酯共聚物(PHBHHx) |
MECHANICAL PROPERTIES AND BIODEGRADABILITY OF POLY(LACTIC ACID )/POLY (3-HYDROXYBUTYRATE-co-3-HYDROXYHEXANOATE) (PLA/PHBHHX) BLENDS |
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| Authors: | WANG Shufang GUO Tianying YANG Chao WANG Hongjian LIU Jing YUAN Xiaoyan ZHENG Junwen ZHANG Banghua SONG Cunjiang Key Laboratory of Functional Polymer Materials for Ministry of Education |
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| Institution: | WANG Shufang1 GUO Tianying1 YANG Chao2 WANG Hongjian3 LIU Jing2 YUAN Xiaoyan3 ZHENG Junwen3 ZHANG Banghua2 SONG Cunjiang2 1 Key Laboratory of Functional Polymer Materials for Ministry of Education,Institute of Polymer Chemistry,Nankai University,Tianjin 300071,China. 2 Department of Microbiology,Life Science College,Key Laboratory of Bioactive Materials for Ministry of Education,Nankai University,Tianjin 300071,China. 3 Materials Science College,Tianjin University,Tianjin 300072,China. |
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| Abstract: | Poly(lactic acid)/poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PLA/PHBHHx) blends were prepared by melt mixing method. Mechanical properties of the blends were investigated by tensile mechanical test. Biodegradability for PLA/PHBHHx blends was investigated in detail by soil suspension cultivation and scanning electron microscopy (SEM). Experimental results indicated that increasing PHBHHx content led to decrease in tensile strength and modulus, and yet significantly increase the rate of biodegradation of the blends. But the rate of weight-loss of PLA/PHBHHx blends (20/80) was faster than that of pure PHBHHx. PLA/PHBHHx blends, especially the blends containing 20/80 (wt/wt), possess a good combination of mechanical properties and biodegradation rate. |
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| Keywords: | Mechanical properties Biodegradability Blending PLA PHBHHx |
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