Preparation and water sorption properties of novel SiO_(2)-LiBr microcapsules for water-retaining pavement

作     者：Wenjing Li Gilmore Wellio Tiejun Lu Changjun Zou Yongliang Li Wenjing Li;Gilmore Wellio;Tiejun Lu;Changjun Zou;Yongliang Li

作者机构：School of Chemical EngineeringUniversity of BirminghamEdgbastonBirmingham B152TTUK College of Chemistry and Chemical EngineeringSouthwest Petroleum UniversityChengdu 610500China Chengdu Advanced Metal Materials Industry Technology Research Institute Co.LtdChengdu 610000China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2021年第34卷第6期

页      面：230-241页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financial support of The National Scholarship Foundation of China China Scholarship Council(3101) 

主　　题：Microcapsules Water vapor sorption Thermal performance Adsorption kinetics Water-retaining pavement 

摘      要：Novel SiO_(2)-LiBr microcapsules for water-retaining pavement were prepared and firstly characterized by scanning electron microscope(SEM),particle size analysis,and Fourier transform infrared spectroscopy(FT-IR).The water vapor sorption and desorption of the formulated microcapsules was then experimentally studied using dynamic vapor sorption(DVS),with the results fitted to three kinds of adsorption kinetics *** addition,the specific surface area(SSA)was also calculated based on BET theory;and the thermal performance was investigated by laser flash analysis(LFA).Experimental results show a change of 103%in mass of the microcapsule sample under 90%relative humidity(RH)at 30℃after water vapor *** fitting of results indicates that the adsorption process is mainly governed by the intra-particle diffusion mechanism,followed by the pseudo-first-order adsorption *** comparison with most conventional pavement materials,it is found that the SSA of the formulated microcapsules is much larger while the thermal conductivity is *** unique properties of the formulated SiO_(2)-LiBr microcapsules have significant potential to take the edge off the urban heat island effect and reduce rutting when applied to water-retaining pavement materials.