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用高分支聚胺修改的多功能纤维素基材料的制备和表征

Hongye Ren¹, Zhimeng Zhao¹, Junlong Gao¹

¹School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China.

International journal of biological macromolecules

|February 5, 2025

概括

这项研究用高分支聚胺 (HBPA) 增强了细菌纤维素 (BC) 薄膜,显著提高了先进材料应用的机械强度,压电性能和抗菌活性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
生物材料工程生物材料工程

背景情况:

基于纤维素的材料为先进的应用提供可持续的平台.
细菌纤维素 (BC) 具有独特的结构性质,但需要修改以提高性能.
超分支聚胺 (HBPA) 可以为聚合物矩阵赋予理想的特性.

研究的目的:

准备和描述用高分支聚胺 (HBPA) 修改的纤维素基薄膜.
评估HBPA修饰对细菌纤维素薄膜机械,压电,热,光学和抗菌性能的影响.
探索HBPA修饰的BC膜在各种技术领域的潜力.

主要方法:

在低温下使用性尿素溶液溶解细菌纤维素 (BC).
用HBPA修改BC水凝,然后进行热压,以形成基于纤维素的薄膜 (BCF).
综合性表征包括抗拉强度,压电性能,热分解,光,氧指数,空气透性和抗菌检测.

主要成果:

修改HBPA显著提高了BCF的抗拉强度,从11.22 MPa提高到15.51 MPa.
零电性能得到改善,开通电路电压从0.45V增加到1.09V,短路电流密度上升到1.4mA/cm2.
经过修改的薄膜表现出大约270°C的热分解温度,450nm的光,高氧指数 (55.60),低空气透性,以及对黄金葡萄球菌和大肠杆菌的显著抑制作用.

结论:

超分支聚胺修饰有效地增强了细菌纤维素膜的机械和压电性能.
修改后的纤维素基薄膜显示出更好的热稳定性,光学性能和显著的抗菌活性.
这些发现凸显了HBPA修饰的BC膜作为多功能,高性能生物材料的潜力.

关键词:

纤维素纤维素是一种纤维素.超分支聚胺的过分支的聚胺.部分电力是压电的.

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