摘 要
形状记忆聚合物作为一种智能材料，因其独特的刺激响应性能和潜在的应用价值而备受关注。本研究以制备具有优异形状记忆性能的交联聚合物为目标，采用可逆共价键和非共价相互作用构建了新型刺激响应型交联网络。通过引入动态二硫键作为可逆交联点，并结合氢键等弱相互作用，成功合成了系列形状记忆聚合物。利用傅里叶变换红外光谱、核磁共振波谱及热重分析等手段对材料结构进行了表征，结果表明所制备的聚合物具有预期的化学结构。通过动态力学分析和差示扫描量热法研究了材料的热性能，发现其玻璃化转变温度适中且可调。重点考察了材料在不同条件下的形状记忆效应，包括固定率、回复率等关键参数，实验结果显示该类聚合物表现出良好的形状记忆性能，在多种外界刺激下均能实现快速且完全的形状回复。创新性地将动态二硫键与多重非共价相互作用相结合，赋予材料更优的综合性能，拓展了形状记忆聚合物的设计思路，为开发高性能智能材料提供了新途径。
关键词：形状记忆聚合物 动态二硫键 非共价相互作用
Abstract
Shape memory polymers, as a class of smart materials, have garnered significant attention due to their unique stimulus-responsive properties and potential application value. This study aimed at developing crosslinked polymers with superior shape memory performance by constructing novel stimulus-responsive crosslinked networks using reversible covalent bonds and non-covalent interactions. Dynamic disulfide bonds were introduced as reversible crosslinking points in conjunction with weak interactions such as hydrogen bonding, successfully synthesizing a series of shape memory polymers. The material structures were characterized using Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and thermogravimetric analysis, confirming the anticipated chemical structures of the prepared polymers. Their thermal properties were investigated through dynamic mechanical analysis and differential scanning calorimetry, revealing moderate and tunable glass transition temperatures. The shape memory effects under various conditions, including key parameters like fixation ratio and recovery ratio, were examined in detail, with experimental results indicating excellent shape memory performance, achieving rapid and complete shape recovery under multiple external stimuli. Innovatively combining dynamic disulfide bonds with multiple non-covalent interactions endowed the materials with enhanced overall performance, broadening the design concepts for shape memory polymers and providing new avenues for the development of high-performance smart materials.
Keyword:Shape Memory Polymers Dynamic Disulfide Bonds Non-Covalent Interactions
目 录
1绪论 1
1.1研究背景与意义 1
1.2国内外研究现状 1
1.3本文研究方法 1
2刺激响应型交联聚合物的制备 2
2.1原材料选择与预处理 2
2.2合成路线设计 2
2.3制备工艺优化 3
3形状记忆性能表征 4
3.1测试方法建立 4
3.2形状记忆效应分析 4
3.3影响因素探讨 5
4应用性能与机理研究 5
4.1力学性能评价 6
4.2热力学性能分析 6
4.3形状记忆机理 7
结论 8
参考文献 9
致谢 10
形状记忆聚合物作为一种智能材料，因其独特的刺激响应性能和潜在的应用价值而备受关注。本研究以制备具有优异形状记忆性能的交联聚合物为目标，采用可逆共价键和非共价相互作用构建了新型刺激响应型交联网络。通过引入动态二硫键作为可逆交联点，并结合氢键等弱相互作用，成功合成了系列形状记忆聚合物。利用傅里叶变换红外光谱、核磁共振波谱及热重分析等手段对材料结构进行了表征，结果表明所制备的聚合物具有预期的化学结构。通过动态力学分析和差示扫描量热法研究了材料的热性能，发现其玻璃化转变温度适中且可调。重点考察了材料在不同条件下的形状记忆效应，包括固定率、回复率等关键参数，实验结果显示该类聚合物表现出良好的形状记忆性能，在多种外界刺激下均能实现快速且完全的形状回复。创新性地将动态二硫键与多重非共价相互作用相结合，赋予材料更优的综合性能，拓展了形状记忆聚合物的设计思路，为开发高性能智能材料提供了新途径。
关键词：形状记忆聚合物 动态二硫键 非共价相互作用
Abstract
Shape memory polymers, as a class of smart materials, have garnered significant attention due to their unique stimulus-responsive properties and potential application value. This study aimed at developing crosslinked polymers with superior shape memory performance by constructing novel stimulus-responsive crosslinked networks using reversible covalent bonds and non-covalent interactions. Dynamic disulfide bonds were introduced as reversible crosslinking points in conjunction with weak interactions such as hydrogen bonding, successfully synthesizing a series of shape memory polymers. The material structures were characterized using Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, and thermogravimetric analysis, confirming the anticipated chemical structures of the prepared polymers. Their thermal properties were investigated through dynamic mechanical analysis and differential scanning calorimetry, revealing moderate and tunable glass transition temperatures. The shape memory effects under various conditions, including key parameters like fixation ratio and recovery ratio, were examined in detail, with experimental results indicating excellent shape memory performance, achieving rapid and complete shape recovery under multiple external stimuli. Innovatively combining dynamic disulfide bonds with multiple non-covalent interactions endowed the materials with enhanced overall performance, broadening the design concepts for shape memory polymers and providing new avenues for the development of high-performance smart materials.
Keyword:Shape Memory Polymers Dynamic Disulfide Bonds Non-Covalent Interactions
目 录
1绪论 1
1.1研究背景与意义 1
1.2国内外研究现状 1
1.3本文研究方法 1
2刺激响应型交联聚合物的制备 2
2.1原材料选择与预处理 2
2.2合成路线设计 2
2.3制备工艺优化 3
3形状记忆性能表征 4
3.1测试方法建立 4
3.2形状记忆效应分析 4
3.3影响因素探讨 5
4应用性能与机理研究 5
4.1力学性能评价 6
4.2热力学性能分析 6
4.3形状记忆机理 7
结论 8
参考文献 9
致谢 10
