Sealing-free fast-response paraffin/nanoporous gold hybrid actuator

IMR OpenIR

	Sealing-free fast-response paraffin/nanoporous gold hybrid actuator
	Ye, Xing-Long; Jin, Hai-Jun; Ye, XL; Jin, HJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
	2017-09-20
发表期刊	IOP PUBLISHING LTD
ISSN	0957-4484
卷号	28 期号:38 页码:-
摘要	Paraffin-based actuators can deliver large actuation strokes and high actuation stress, but often suffer from a low response rate and leaking problems. Here, we report a new paraffin/metal hybrid actuator, which was fabricated by infiltrating nanoporous gold with paraffin. It exhibits a fast actuation rate owing to the high thermal conductivity of the inter-connected metal phase, and requires no external sealing because liquid paraffin can be well confined in nanoscale channels, due to the large capillarity. We found that in this hybrid actuator, the stress generated by actuation is negligibly small when the characteristic size of the nanoporous gold (L) is above similar to 70 nm, and increases dramatically with a decreasing size when L < similar to 70 nm. The large actuation stress in samples with L < similar to 70 nm is ascribed to a 'smaller is stronger' effect in paraffin wax-the paraffin in smaller pores can sustain larger tensile stress, and thus the contraction of paraffin during cooling can be translated into larger compression stress and strain energy in a metal framework, leading to a larger actuation stress and energy. We also demonstrate that complex actuation motions can be achieved by incorporating hierarchical-structured nanoporous metal with paraffin.; Paraffin-based actuators can deliver large actuation strokes and high actuation stress, but often suffer from a low response rate and leaking problems. Here, we report a new paraffin/metal hybrid actuator, which was fabricated by infiltrating nanoporous gold with paraffin. It exhibits a fast actuation rate owing to the high thermal conductivity of the inter-connected metal phase, and requires no external sealing because liquid paraffin can be well confined in nanoscale channels, due to the large capillarity. We found that in this hybrid actuator, the stress generated by actuation is negligibly small when the characteristic size of the nanoporous gold (L) is above similar to 70 nm, and increases dramatically with a decreasing size when L < similar to 70 nm. The large actuation stress in samples with L < similar to 70 nm is ascribed to a 'smaller is stronger' effect in paraffin wax-the paraffin in smaller pores can sustain larger tensile stress, and thus the contraction of paraffin during cooling can be translated into larger compression stress and strain energy in a metal framework, leading to a larger actuation stress and energy. We also demonstrate that complex actuation motions can be achieved by incorporating hierarchical-structured nanoporous metal with paraffin.
部门归属	[ye, xing-long ; jin, hai-jun] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china
关键词	Actuator Nanoporous Gold Paraffin Wax Hybrid Material
学科领域	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
资助者	National Natural Science Foundation of China [51222105, 51571206]; Natural Science Foundation of Liaoning Province [2014029103]
收录类别	SCI
语种	英语
WOS记录号	IOP:0957-4484-28-38-aa7be6
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/79090
专题	中国科学院金属研究所
通讯作者	Ye, XL; Jin, HJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Ye, Xing-Long,Jin, Hai-Jun,Ye, XL,et al. Sealing-free fast-response paraffin/nanoporous gold hybrid actuator[J]. IOP PUBLISHING LTD,2017,28(38):-.
APA	Ye, Xing-Long,Jin, Hai-Jun,Ye, XL,&Jin, HJ .(2017).Sealing-free fast-response paraffin/nanoporous gold hybrid actuator.IOP PUBLISHING LTD,28(38),-.
MLA	Ye, Xing-Long,et al."Sealing-free fast-response paraffin/nanoporous gold hybrid actuator".IOP PUBLISHING LTD 28.38(2017):-.