| High-strain shape memory polymer networks crosslinked by SiO2 | |
| Department | 固体润滑国家重点实验室 ; 先进润滑与防护材料研究发展中心 |
Zhang YM(张耀明); Wang QH(王齐华) ; Wang C(王超); Wang TM(王廷梅)
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| 2011 | |
| Source Publication | Journal of Materials Chemistry
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| ISSN | 0959-9428 |
| Volume | 21Pages:9073-9078 |
| Abstract | We addressed a novel high-strain shape memory polymer network constructed from SiO2 microspheres core functionalized with polycaprolactone arms. Using abundant surface hydroxyl of silica, epsilon- caprolactone was initiated and uniform SiO2@PCL macroparticles were formed; after cross-linking of SiO2@PCL by MDI, a high-strain shape memory polymer network of SiO2–SMP was obtained. Compared to traditional SMP having similar composition, the SiO2–SMP exhibits excellentmechanical strength and good shape memory properties due to the introduction of SiO2 as a cross-linking point. The elastic moduli (E) and tensile strength (sm) of the SiO2–SMP were improved to 500 MPa and 90 MPa, respectively, at room temperature. It could be attributed to the enhancement of the combining force among polymer chains caused by the crosslinking networks, and the rigidity of the polymer owing to the addition of SiO2 as filler. High shape fixing ratios ( 100%) and recovery ratios (more than 95%) were also exhibited for SiO2–SMP from the second circle. The comparatively low recovery ratios were exhibited in the first circle; the obvious evidence of the existence of the irreversible bond breakage is attributed to it. Furthermore, the mechanical and shape memory properties could be adjusted by changing the size of silica microspheres and the molecular weight of the PCL. |
| Subject Area | 材料科学与物理化学 |
| Funding Organization | the National Foundation for Distinguished Young Scholars of China (Grant NO.51025517);the innovative group foundation from NSFC (Grant NO.50721062);the National 973 project of China (2007CB607606) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 聚合物自润滑复合材料组 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/753 |
| Collection | 固体润滑国家重点实验室（LSL） 中国科学院材料磨损与防护重点实验室/先进润滑与防护材料研究发展中心 |
| Corresponding Author | Wang QH(王齐华) |
| Recommended Citation GB/T 7714 | Zhang YM,Wang QH,Wang C,et al. High-strain shape memory polymer networks crosslinked by SiO2[J]. Journal of Materials Chemistry,2011,21:9073-9078. |
| APA | 张耀明,王齐华,王超,&王廷梅.(2011).High-strain shape memory polymer networks crosslinked by SiO2.Journal of Materials Chemistry,21,9073-9078. |
| MLA | 张耀明,et al."High-strain shape memory polymer networks crosslinked by SiO2".Journal of Materials Chemistry 21(2011):9073-9078. |
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| 20119073-9078.PDF（310KB） | 开放获取 | License | View Application Full Text | |||
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