纤维素晶须/羧基丁腈橡胶结构与性能的研究

摘要本文采用酸水解法制备了细菌纤维素晶须（BCW），并用TEM、SEM等对其结构进行了表征。将BCW添加到羧化丁腈胶乳（xNBR）中制备了细菌纤维素/羧化丁腈橡胶纳米复合材料。研究了不同含量的纤维素晶须对羧化丁腈胶乳力学性能和热稳定性等性能的影响。结果表明：采用酸水解法可以制备纳米级的纤维素晶须，纤维素的无定形部分被除去，结晶区被保留下来；加入纤维素晶须之后，复合材料的拉伸强度、撕裂强度和杨氏模量都有显著的增加。并且随着晶须含量的增加逐渐升高，当晶须增加到13份时，力学性能变化最显著。63625

毕业论文关键词细菌纤维素晶须羧化丁腈橡胶力学性能

毕业设计说明书（论文）外文摘要

Title The structure and properties of bacterial cellulose whisker/ Carboxylated Acrylonitrile butadiene Rubber

Abstract

In this paper，bacterial cellulose whisker（BCW）was prepared by acid hydrolysis from bacterial cellulose. The characteristic of bacterial cellulose whisker was analyzed by Transmission Electron Microscope and Scanning Electron Microscope. BCW/ carboxylated acrylonitrile butadiene rubber (xNBR) vulcanizates were fabricated by latex mixing BCW suspension with xNBR latex. The thermal and mechanical properties of BCW/xNBR vulcanizates were studied. The results confirmed that BCW can be prepared successfully by acid hydrolysis. The amorphous parts of the cellulose is removed while the crystallization zone is preserved. The tensile strength, tear strength and Young's modulus were improved after adding BCW,and were improved with the increase of the BCW contents. When the content of BCW reaches to 13%,the mechanical properties of BCW/xNBR vulcaniztes are optimal.

Keywords bacterial cellulose whisker , xNBR, mechanical property

1绪论 - 1 -

1.1引言 - 1 -

1.2纳米纤维素晶须及其制备 - 1 -

1.2.1纳米纤维素晶须简介 - 1 -

1.2.2纳米纤维素晶须的制备 - 2 -

1.2.3纤维素纳米晶须的改性 - 4 -

1.3纳米纤维素晶须/聚合物复合材料的制备 - 6 -

1.3.1乳液共混法 - 6 -

1.3.2溶液法 - 6 -

1.3.3机械法 - 7 -

1.4本课题的目的、意义及主要研究内容 - 7 -

2、实验部分 - 8 -

2.1实验原料与设备 - 8 -

2.1.1实验原料 - 8 -

2.1.2实验设备 - 8 -

2.2实验配方 - 8 -

2.3 BCW/xNBR复合材料的制备 - 8 -

2.4试样表征及性能测试 - 9 -

2.4.1硫化特性曲线测试 - 9 -

2.4.2力学性能测试 - 9 -

2.4.3XRD测试 - 9 -

2.4.4红外光谱（FTIR）测试 - 9 -

2.4.5透射电子显微镜（TEM）测试 - 9 -

2.4.6扫描电子显微镜（SEM）测试 - 9 -

2.4.7TG测试 - 10 -

3结果与讨论 - 10 - 纤维素晶须/羧基丁腈橡胶结构与性能的研究:http://www.751com.cn/huaxue/lunwen_70235.html