朱会霞,贾士儒,沈惠玲,杨洪江,贾原媛,张桂才

• 1:天津科技大学工业微生物教育部重点实验室
• 2:天津科技大学材料科学与化学工程学院

摘要(Abstract)：

BC膜生物合成的过程受培养基中加入不同浓度PVA的影响,会产生拉伸性能各异的BC膜。培养基中添加低浓度(20和40 g·L·1)聚乙烯醇(PVA)后BC膜产量和拉伸强度等指标均有提高,培养至96 h时20和40 g·L·1 PVA浓度的培养基中BC产量分别比对照组高出40.48%和16.9%,此时40 g·L·1 PVA培养基中BC膜的弹性模量和拉伸强度最大,分别为4.56 GPa和66.8 MPa;而添加高浓度(60和80 g·L·1)PVA后BC膜产量和拉伸强度均降低。X-射线衍射结果显示培养基中低浓度的PVA可以提高膜的结晶度,而高浓度的PVA降低BC膜的结晶度;扫描电镜照片显示培养基中添加低浓度PVA后形成的BC膜结构更为致密均匀。

关键词(KeyWords)： 聚乙烯醇;细菌纤维素膜;生物合成;弹性模量;拉伸性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然基金委员会资助项目(20976133);; 天津科技大学优秀博士论文培育基金(B201002)

作者(Author): 朱会霞,贾士儒,沈惠玲,杨洪江,贾原媛,张桂才

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