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蛋白质修饰纤维素纳米晶体在增强和自动驱动生物降解的酸聚

Siwen Bi¹, Zhuang Zhang², Zhenzhen Yang³

¹Hubei Provincial Key Laboratory of Green Materials for Light Industry, Hubei University of Technology, Wuhan, Hubei 430068, China; New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei University of Technology, Wuhan, Hubei 430068, China; Hubei Longzhong Laboratory, Xiangyang, Hubei 441000, China.

Carbohydrate polymers

|October 15, 2023

概括

研究人员开发了一种新的方法来增强可生物降解的聚合物,使用改性纤维素纳米晶体 (CNC) 和脂酶. 这项创新提高了聚合物的强度,并使控制的,自动驱动的生物降解成为可能,解决了塑料废弃物的挑战.

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
生物技术是生物技术.

背景情况:

可生物降解的聚合物在长期可行性和可控降解方面面临挑战,这阻碍了它们在打击塑料废物的有效性.
目前用于增强生物降解聚合物的方法往往无法控制降解速度和环境稳定性.
开发强大且可控的生物降解策略对于可持续的塑料废物管理至关重要.

研究的目的:

在纤维素纳米晶体 (CNC) 和聚烯酸 (PCL) 之间创建一个稳定可控的界面微环境,以提高聚合物性能和生物降解.
调查脂酶PS在CNC上的物理结合及其随后在PCL内嵌入.
评估开发的PCL复合材料的增强和自动生物降解能力.

主要方法:

从物理上将Burkholderia cepacian中的脂酶PS纳入纤维素纳米晶体 (CNC).
将蛋白质修饰的CNC嵌入到聚烯酸 (PCL) 基质中.
通过表面电荷和颗粒大小分析,在CNC上描述脂酶的物理吸附.
使用FT-IR光谱学确认脂酶和CNC的结合.
评估PCL复合材料的热稳定性,界面张力,核化效率和拉伸性能.
使用嵌入式脂酶PS.PS评估PCL膜的酶性水解率.
研究压缩后成型对脂酶活性的影响.

主要成果:

与未经修改的CNC相比,用PCL进行蛋白质修改的CNC表现出更高的最大热分解温度 (345°C) 和更低的界面张力 (11mN/m).
PCL复合材料显著提高了核化效率,并在破裂时显著拉伸1086%.
嵌入式脂酶PS的低度 (0.67%) 在不到140小时内完全化了PCL膜.
在80-100°C的压缩后成型中,脂酶活性基本上不受影响,这表明CNC的保护作用.

结论:

蛋白质修饰的CNC有效地增强了聚烯酸 (PCL),并为自动生物降解提供了可控制的微环境.
开发的复合材料提供了增强的机械性能和PCL高效的酶降解.
这种方法为聚合物增强和塑料废物的可持续管理提供了一个有希望的新技术.

关键词:

纤维素纳米晶体纤维素纳米晶体嵌入式酶嵌入式酶异质核化发生在异质核化过程中加强加强加强加强自动驱动的生物降解.

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