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Title: Enhancing the Thermal Conductance of Polymer and Sapphire Interface via Self-Assembled Monolayer
Author: Zheng, Kun1; Sun, Fangyuan2; Zhu, Jie2, 4; Ma, Yongmei1; Li, Xiaobo3; Tang, Dawei2; Wang, Fosong1; Wang, Xiaojia4
Source: ACS NANO
Issued Date: 2016-08-01
Volume: 10, Issue:8, Pages:7792-7798
Keyword: interfacial thermal conductance ; solubility parameter ; organic-inorganic interface ; miscibility ; time domain thermoreflectance
DOI: 10.1021/acsnano.6b03381
DOC Type: Article
English Abstract: Interfacial thermal conductance (ITC) receives enormous consideration because of its significance in determining thermal performance of hybrid materials, such as polymer based nanocomposites. In this study, the ITC between sapphire and polystyrene (PS) was systematically investigated by time domain thermoreflectance (TDTR) method. Silane based self-assembled monolayers (SAMs) with varying end groups, -NH2, -Cl, -SH and -H, were introduced into sapphire/PS interface, and their effects on ITC were investigated. The ITC was found to be enhanced up by a factor of 7 through functionalizing the sapphire surface with SAM, which ends with a chloride group (-Cl). The results show that the enhancement of the thermal transport across the SAM-functionalized interface comes from both strong covalent bonding between sapphire and silane-based SAM, and the high compatibility between the SAM and PS. Among the SAMs studied in this work, we found that the ITC almost linearly depends on solubility parameters, which could be the dominant factor influencing on the ITC compared with wettability and adhesion. The SAMs serve as an intermediate layer that bridges the sapphire and PS. Such a feature can be applied to ceramic-polymer immiscible interfaces by functionalizing the ceramic surface with molecules that are miscible with the polymer materials. This research provides guidance on the design of critical-heat transfer materials such as composites and nanofluids for thermal management.
WOS Headings: Science & Technology ; Physical Sciences ; Technology
WOS Subject: Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS Subject Extended: Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS Keyword Plus: ADHESION ; TRANSPORT ; SURFACE ; FILMS ; THIN ; NANOSCALE ; SUBSTRATE ; BEHAVIOR ; LAYERS
Indexed Type: SCI
Funder: National Natural Science Foundation of China(51373184 ; National Plan for Science & Technology Support, China(2014BAC03B05) ; MoST (Ministry of Science and Technology)(2014CB931803 ; Ministry of Science and Technology of the People's Republic of China(2013YQ120355) ; UMN CSE ; 51336009) ; 2012CB933801)
Language: 英语
WOS ID: WOS:000381959100062
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Content Type: 期刊论文
URI: http://ir.etp.ac.cn/handle/311046/112515
Appears in Collections:中国科学院工程热物理所(论文库)_期刊论文(SCI)

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description.institution: 1.Chinese Acad Sci, Inst Chem, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
3.Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Peoples R China
4.Univ Minnesota, Dept Mech Engn, Minneapolis, MN 55455 USA
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