文献类型：期刊文献

英文题名：Effects of processing conditions on the properties of paraffin/melamine-urea-formaldehyde microcapsules prepared by in situ polymerization

作者：Han, Shenjie[1] Chen, Yanping[1,2] Lyu, Shaoyi[1] Chen, Zhilin[1,3] Wang, Siqun[1,4] Fu, Feng[1,3]

第一作者：Han, Shenjie

通信作者：Wang, SQ[1];Fu, F[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Beijing 100091, Peoples R China;[2]Beijing Inst Technol, Sch Mat Sci & Engn, Beijing Engn Res Ctr Cellulose & Its Derivat, Beijing 100081, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Jiangsu, Peoples R China;[4]Univ Tennessee, Ctr Renewable Carbon, Knoxville, TN 37996 USA

年份：2020

卷号：585

外文期刊名：COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

收录：;EI(收录号：20194807739894);Scopus(收录号：2-s2.0-85075385031);WOS:【SCI-EXPANDED(收录号:WOS:000502046200014)】；

基金：The study was financially supported by the National High-Tech R&D Program (863 Program) (Grant No. 2010AA101704), the Fundamental Research Funds of CAF (Grant No. CAFYBB2017ZX003), the Special Fund for Forest Scientific Research in the Public Welfare (Grant No.201504603), and the USDA National Institute of Food and Agriculture, Hatch Projects 1012359.

语种：英文

外文关键词：Phase change material; Microcapsule; Processing conditions; Melamine-Urea-Formaldehyde

摘要：Microcapsules containing phase change material (PCM) paraffin as the internal phase and melamine-urea-formaldehyde (MUF) as the external shell were synthesized by in situ polymerization in the study. The effects of processing conditions (including core-to-shell ratio, concentration of styrene/maleic anhydride (SMA), reaction temperature, reaction time, and final reaction pH) on the properties of synthesized microcapsules (microencapsulation process, morphology, mean diameter, and phase change properties) were investigated. The chemical structures, morphologies, and phase change properties of paraffin/MUF microcapsules were characterized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), differential scanning calorimetry (DSC), and thermogravimetric analyzer (TGA). Under optimal processing conditions (core-to-shell ratio of 1.5, 20 mg/mL SMA, 2-h reaction at 80 degrees C, and final reaction pH 5.5), the encapsulation efficiency of synthesized paraffin/MUF microcapsules reached 77.1% and the phase change latent heat values of melting and crystallization were about 134.3 J/g and 133.1 J/g, respectively.