CAJ | 학술논문

将水玻璃为硅源所制备的纳米孔硅气凝胶与苯乙烯单体用微波加热合成法制备出SiO2气凝胶核／聚苯乙烯壳复合微球．用顺序间隔取样测试方法试验复合微球的密度、转化率和包覆率与微波合成温度、时间和聚合体系各组分变化情况，分析讨论了影响变化因素和原因．通过T EM 和FE-SEM 对复合微球进行结构与形貌表征．结果表明，优选体系组分配比为SiO2气凝胶3 g、苯乙烯21 g、乙醇水溶剂配比为380 g∶20 g、引发剂4．2 g及稳定剂2 g ，微波合成工艺参数为加热功率500 W ，加热时间40 m in、加热温度60℃．在此工艺条件下合成，复合微球合成转化率是67．1％、包覆率为32．7％，制备出的核壳结构复合微球的粒径约为100～200 nm、震实密度为0．353 g／cm3，且表面凹凸不平状似“草莓”的微粒．
장수파리위규원소제비적납미공규기응효여분을희단체용미파가열합성법제비출SiO2기응효핵／취분을희각복합미구．용순서간격취양측시방법시험복합미구적밀도、전화솔화포복솔여미파합성온도、시간화취합체계각조분변화정황，분석토론료영향변화인소화원인．통과T EM 화FE-SEM 대복합미구진행결구여형모표정．결과표명，우선체계조분배비위SiO2기응효3 g、분을희21 g、을순수용제배비위380 g∶20 g、인발제4．2 g급은정제2 g ，미파합성공예삼수위가열공솔500 W ，가열시간40 m in、가열온도60℃．재차공예조건하합성，복합미구합성전화솔시67．1％、포복솔위32．7％，제비출적핵각결구복합미구적립경약위100～200 nm、진실밀도위0．353 g／cm3，차표면요철불평상사“초매”적미립．
The water glass as silicon source of the nanoporous silica aerogel with styrene mon-omer by microwave heating were prepared from SiO2 aerogel nuclear/polystyrene shell com-posite microspheres .Using sequential interval method to test the density of the composite microsphere ,conversion rate and encapsulation with the change of microwave synthesis tem-perature ,time and the component of polymer system .Analyzes and discusses the factors and reasons of the change .Characterize the structure and morphology of the composite micro-sphere through TEM and FE-SEM .The results show that the system is preferred ratio of SiO2 airgel group assignment 3 g ,styrene 21 g ,ethanol aqueous solvent ratio of 380 g∶20 g , initiator 4 .2 g and stabilizer 2 g ,microwave synthesis process parameters heating power 500 W ,heating time 40 min ,the heating temperature 60 ℃ .Synthesis under these conditions , the composite microspheres synthesis conversion rate is 67 .1% ,covering rate is 32 .7% ,core-shell composite microspheres prepared by the particle size of about 100~200 nm ,jolt density is 0 .353 g/cm3 ,and the uneven surface like a“straw berry” particles .