Preparation and properties of polydopamine modified nano-silica reinforced trans-1, 4-polyisoprene shape memory polymers

被引：0
作者：
Zhang C. [1 ]
Zhang J. [1 ]
Wang N. [1 ,2 ]
Li L. [1 ,2 ]
机构：
[1] Liaoning Provincial Key Laboratory for Preparation and Application of Special Functional Materials, Shenyang University of Chemical Technology, Shenyang
[2] Shenyang Research Institute of Industrial Technology for Advanced Coating Materials, Shenyang
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2023年 / 40卷 / 05期
关键词：
mechanical properties; nano-silica; polydopamine; shape memory; trans-1; 4-polyisoprene;
D O I：
10.13801/j.cnki.fhclxb.20220616.002
中图分类号：
学科分类号：
摘要：
The low mechanical strength of shape memory polymers (SMP) are insufficient to meet the standards of most commercial composites today, severely limiting their use in many advanced applications. Therefore, in order to prepare high-performance SMP composite materials, a novel nano-filler SiO2@PDA was prepared by surface modification of nano-silica (SiO2) with polydopamine (PDA), its structure and properties were characterized by SEM, XPS and FTIR, respectively. Shape memory composites based on trans-1,4-polyisoprene (TPI) were prepared by filling SiO2 and SiO2@PDA into TPI as nano-fillers. The thermal stability, comprehensive mechanical properties and shape memory properties of TPI/SiO2 and TPI/SiO2@PDA composites were systematically studied. The results show that PDA modification enhances the dispersion and interfacial interaction of SiO2 in the TPI matrix, so that the thermal stability and mechanical properties of the TPI/SiO2@PDA composites can be improved, while maintaining good shape memory performance. The impact strength and tensile strength of the composite reach the maximum values when the SiO2@PDA content is 1.5% (based on the mass of TPI, the same below), which are 43.5% and 25% higher than that of the neat TPI, respectively. Moreover, shape fixation rate (Rf) and shape recovery rate (Rr) of the composites are over 97%. © 2023 Beijing University of Aeronautics and Astronautics (BUAA). All rights reserved.
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页码：2772 / 2782
页数：10
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