Dual-Triggered and Thermally Reconfigurable Shape Memory Graphene-Vitrimer Composites
文献类型:期刊论文
作者 | Yang ZH(杨增辉)1,2![]() ![]() ![]() ![]() |
刊名 | ACS Applied Materials & Interfaces
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出版日期 | 2016 |
卷号 | 8期号:33页码:21691-21699 |
关键词 | shape memory polymer vitrimer reconfiguration graphene stimulus |
ISSN号 | 1944-8244 |
通讯作者 | 王齐华 |
英文摘要 | Conventional thermoset shape memory polymers can maintain a stable permanent shape, but the intrinsically chemical cross-linking leads to shape that cannot be altered. In this paper, we prepared shape memory graphene-vitrimer composites whose shape can be randomly changed via dynamic covalent transesterification reaction. Consecutive shape memory cycles indicate stable shape memory with undetected strain shift and constant shape fixity and recovery values (Rf > 99%, Rr > 98%). Quantitative characterization of shape reconfiguration by dynamic mechanical thermal analysis (DMA) shows prime reconfigurable behavior with shape retention ratio of 100%. Thus, the arbitrary 2D or 3D newly permanent shape can be easily obtained from a simple plain sample by facile thermal treatment at 200 °C above transesterification temperature (Tv). Besides, it is found that graphene-vitrimers show a ductile fracture in tensile test with a large breaking strain and classical yield phenomenon because of the well-dispersed graphene sheets in the vitrimer that endow effective stress transfer. As the graphene loading increases from 0% to 1%, the yield strength and breaking stain increase from 12.0 MPa and 6% to 22.9 MPa and 44%, respectively. In addition, graphene also serves as energy convertor to convert near-infrared (NIR) irradiation into thermal energy to induce a helix shape sample that is recovered totally within 80 s sequent NIR irradiation. These dual-triggered and reconfigurable shape memory graphene-vitrimers are expected to significantly simplify processing of complex shape and broaden the applications of shape memory polymers. |
学科主题 | 材料科学与物理化学 |
收录类别 | SCI |
资助信息 | the National Basic Research Program of China ("973" Program, Grant 2015CB057502);the National Defense Innovation Fund of Chinese Academy of Sciences (Grant CXJJ-14-M43);the National Natural Science Foundation of China (Grant 51305431) |
语种 | 英语 |
WOS记录号 | WOS:000382179400067 |
源URL | [http://210.77.64.217/handle/362003/20078] ![]() |
专题 | 兰州化学物理研究所_先进润滑与防护材料研究发展中心 兰州化学物理研究所_固体润滑国家重点实验室 |
通讯作者 | Wang QH(王齐华) |
作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
推荐引用方式 GB/T 7714 | Yang ZH,Wang QH,Wang TM,et al. Dual-Triggered and Thermally Reconfigurable Shape Memory Graphene-Vitrimer Composites[J]. ACS Applied Materials & Interfaces,2016,8(33):21691-21699. |
APA | Yang ZH,Wang QH,Wang TM,&王齐华.(2016).Dual-Triggered and Thermally Reconfigurable Shape Memory Graphene-Vitrimer Composites.ACS Applied Materials & Interfaces,8(33),21691-21699. |
MLA | Yang ZH,et al."Dual-Triggered and Thermally Reconfigurable Shape Memory Graphene-Vitrimer Composites".ACS Applied Materials & Interfaces 8.33(2016):21691-21699. |
入库方式: OAI收割
来源:兰州化学物理研究所
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