Thermal-Regulated Adhesion Enhancement and Fast Switching within the Viscoelastic Glass Transition Zone of a Shape Memory Polymer

doi:10.1021/acs.langmuir.1c02150

	Thermal-Regulated Adhesion Enhancement and Fast Switching within the Viscoelastic Glass Transition Zone of a Shape Memory Polymer
	Gong, Ling; Wang, Xiaojie
刊名	LANGMUIR
	2021-11-16
卷号	37
ISSN号	0743-7463
DOI	10.1021/acs.langmuir.1c02150
通讯作者	Wang, Xiaojie(xjwang@iamt.ac.cn)
英文摘要	The effects of temperature and preload on adhesion of an epoxy- based shape memory polymer (ESMP) were investigated experimentally. The ESMP sheet and polydimethylsiloxane (PDMS) control sample were prepared by mold casting. The adhesion measurements were carried out on a home-built adhesion tester using a hemispherical glass indenter as the counter-surface. The reduced modulus was determined by the Oliver-Pharr method and Hertz theory. The viscoelastic energy dissipation was extracted, and the effective work of adhesion was calculated by the fitting method and JKR theory. In the vicinity of glass transition temperature (T-g), the viscoelastic enhancement factor (1 + f(v, T)) is as high as 955 because of the strong viscoelastic effect of the ESMP sheet. The adhesion strength of the ESMP sheet is about 589 kPa under a relatively smaller contact displacement condition (similar to 44.6 mu m). The strong viscoelastic effect induces more viscoelastic energy dissipation that contributes to the effective work of adhesion and leads to strong preload dependence of the adhesion. The pull-off force Fpull-off is demonstrated to linearly depend on (FmEr2/3)-E-1/3. In the sharp half glass transition zone (T > T-g), the viscoelasticity and rigidity rapidly decrease with the temperature increasing about 10 degrees C, leading to a 6-fold reduction in adhesion. The results indicate that the adhesion of the ESMP sheet can be significantly enhanced and meanwhile rapidly switched within the viscoelastic glass transition zone.
资助项目	Youth Spark Project of President Foundation of Hefei Institutes of Physical Science[YZJJ2020QN28] ; Natural Science Foundation of Anhui Province[2108085QE217] ; Natural Science Foundation of Anhui Province[1908085MF196] ; Open Funding Project of National Key Laboratory of Human Factors Engineering[6142222190311]
WOS关键词	DRY ADHESIVE ; SURFACES ; BEHAVIOR ; MODULUS
WOS研究方向	Chemistry ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000721132300024
资助机构	Youth Spark Project of President Foundation of Hefei Institutes of Physical Science ; Natural Science Foundation of Anhui Province ; Open Funding Project of National Key Laboratory of Human Factors Engineering
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126596]
专题	中国科学院合肥物质科学研究院
通讯作者	Wang, Xiaojie
作者单位	Chinese Acad Sci, Inst Adv Mfg Technol, Hefei Inst Phys Sci, Changzhou 213164, Peoples R China
推荐引用方式 GB/T 7714	Gong, Ling,Wang, Xiaojie. Thermal-Regulated Adhesion Enhancement and Fast Switching within the Viscoelastic Glass Transition Zone of a Shape Memory Polymer[J]. LANGMUIR,2021,37.
APA	Gong, Ling,&Wang, Xiaojie.(2021).Thermal-Regulated Adhesion Enhancement and Fast Switching within the Viscoelastic Glass Transition Zone of a Shape Memory Polymer.LANGMUIR,37.
MLA	Gong, Ling,et al."Thermal-Regulated Adhesion Enhancement and Fast Switching within the Viscoelastic Glass Transition Zone of a Shape Memory Polymer".LANGMUIR 37(2021).