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

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	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.
刊名	IOP PUBLISHING LTD
	2017-09-20
卷号	28 期号:38 页码:-
关键词	Actuator Nanoporous Gold Paraffin Wax Hybrid Material
ISSN号	0957-4484
英文摘要	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.
学科主题	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
语种	英语
资助机构	National Natural Science Foundation of China [51222105, 51571206]; Natural Science Foundation of Liaoning Province [2014029103]
公开日期	2018-01-10
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79090]
专题	金属研究所_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):-.