Preparation of stearic acid/modified expanded vermiculite composite phase change material with simultaneously enhanced thermal conductivity and latent heat - Details

author：

Li, X. (Li, X..) ^[1] | Wei, H. (Wei, H..) ^[2] | Lin, X. (Lin, X..) ^[3] | Xie, X. (Xie, X..) ^[4]

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Scopus

Abstract：

A　novel　stearic　acid/modified　expanded　vermiculite　composite　phase　change　material　(PCM)　was　prepared　in　this　study.　Titanium　dioxide-loaded　expanded　vermiculite　was　treated　with　nitric　acid　(aEVT)　and　then　used　as　stearic　acid　(SA)　supporting　matrix.　The　thermal　conductivity　and　latent　heats　of　the　SA/aEVT　composite　PCM　were　enhanced　simultaneously　compared　with　those　of　SA/expanded　vermiculite　(EV)　and　SA/expanded　vermiculite　with　acid　treatment　(aEV)　composite　PCMs.　The　thermal　conductivity　of　SA/aEVT　was　0.58　W/mK,　which　was　11.4%　and　20.3%　higher　than　those　of　SA/EV　and　SA/aEV,　respectively.　The　latent　heats　of　SA/aEVT　were　146.8　J/g　at　the　melting　temperature　of　65.9　°C　and　141.7　J/g　at　the　freezing　temperature　of　63.4　°C,　which　were　also　higher　than　those　of　SA/EV　and　SA/aEV.　The　results　of　the　thermal　cycling　test　and　Fourier　transform　infrared　spectroscopy　(FT-IR)　indicated　that　the　SA/aEVT　composite　PCM　was　thermally　stable　and　chemically　inert.　Thus,　the　prepared　SA/aEVT　is　a　promising　composite　PCM　for　latent　heat　storage　systems.　©　2016　Elsevier　B.V.　All　rights　reserved.

Keyword：

Acid treatment; Expanded vermiculite; Form-stable composite PCM; Stearic acid; Titanium dioxide

Community：

[ 1 ] [Li, X.]Institute of Materials Science and Engineering, Fuzhou University, New Campus, Minhou College Town, Fuzhou, Fujian, 350180, China
[ 2 ] [Wei, H.]Institute of Materials Science and Engineering, Fuzhou University, New Campus, Minhou College Town, Fuzhou, Fujian, 350180, China
[ 3 ] [Lin, X.]Institute of Materials Science and Engineering, Fuzhou University, New Campus, Minhou College Town, Fuzhou, Fujian, 350180, China
[ 4 ] [Xie, X.]Institute of Materials Science and Engineering, Fuzhou University, New Campus, Minhou College Town, Fuzhou, Fujian, 350180, China

Reprint 's Address：

[Li, X.]Institute of Materials Science and Engineering, Fuzhou University, New CampusChina

Email：

lxiangqi@fzu.edu.cn

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Source ：

Solar Energy Materials and Solar Cells

ISSN： 0927-0248

Year： 2016

Volume： 155

Page： 9-13

4 . 7 8 4

JCR@2016

6 . 3 0 0

JCR@2023

ESI HC Threshold：324

JCR Journal Grade：1

CAS Journal Grade：2

Cited Count：

WoS CC Cited Count：

SCOPUS Cited Count： 88

ESI Highly Cited Papers on the List： 0 Unfold All

WanFang Cited Count：

Chinese Cited Count：

30 Days PV： 1

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