Ma Junxuan
,
Zhou Zhiyu
,
Gao Manman
,
Yu Binsheng
,
Xiao Deming
,
Zou Xuenong
,
Bünger Cody
材料科学技术（英）
doi:10.1016/j.jmst.2016.06.002
Biomaterials are increasingly being evolved to actively adapt to the desired microenvironments so as to introduce tissue integration, reconstruct stability, promote regeneration, and avoid immune rejection. The complexity of its mechanisms poses great challenge to current biomimetic synthetic materials. Although still at initial stage, harnessing cells, tissues, or even entire body to synthesize bioadaptive materials is introducing a promising future.
关键词:
Biomaterials
,
Bioadaptation
,
Tissue integration
,
Biosynthesis
何晓锐
,
张晓琴
,
张晓
,
钟瑞
,
黄建新
高分子材料科学与工程
从污泥中分离获得了一株可直接以蔗糖为基质发酵合成聚合度高、韧性强的聚羟基烷酸酯(PHA)的细菌U-3,经鉴定其为产碱假单胞菌(Pseudomonas alcaligenes).U-3菌株以蔗糖为碳源,蛋白胨、酵母膏为基质,摇瓶发酵培养44 h细胞生长量达19.58 g/L,PHA聚合物产量为10.82 g/L.利用傅里叶变换红外光谱、核磁共振波谱、乌氏黏度法、差示扫描量热、电子万能材料试验机分析研究了U-3菌合成PHA聚合物的结构、热学性能及力学性能.结果表明,该聚合物为聚-β-羟基壬酸酯,其粘均相对分子质量为1.06×106;弹性模量2.1381MPa,断裂伸长率282.9061％,拉伸应力2.3594MPa,位移79.21371mm;熔点37.91℃,分解温度为45.43℃,结晶度为5.18％,该聚合物膜具有良好的力学性能和热塑性,是一种新型的PHA原料资源.
关键词:
生物合成
,
聚羟基烷酸酯
,
产碱假单胞菌
,
聚-β-羟基壬酸聚酯
,
结构表征
