CAJ | 학술논문

采用界面聚合的方法,以甲苯-2,4-二异氰酸酯(TDI)和乙二胺(EDA)为反应单体,非离子表面活性剂聚乙二醇壬基苯基醚(OP)为乳化剂,合成了正二十烷为相变材料的聚脲包覆微胶囊.结果表明,二异氰酸酯和乙二胺按质量比1.9∶1进行反应.以透射电镜和激光粒度分析仪分析微胶囊,测得空心微胶囊直径约为0.2μm,含正二十烷微胶囊约为2-6 μm.红外光谱分析证明,壁材料聚脲是由TDI及EDA两种单体形成的.正二十烷的包裹效率约为75%.微胶囊的熔点接近囊芯二十烷的熔点,而其储热量在壁材固定时随囊芯的量而变.热重分析表明,囊芯正二十烷、含正二十烷的微胶囊以及壁材料聚脲,能够耐受的温度分别约为130℃、170℃及270℃
채용계면취합적방법,이갑분-2,4-이이청산지(TDI)화을이알(EDA)위반응단체,비리자표면활성제취을이순임기분기미(OP)위유화제,합성료정이십완위상변재료적취뇨포복미효낭.결과표명,이이청산지화을이알안질량비1.9∶1진행반응.이투사전경화격광립도분석의분석미효낭,측득공심미효낭직경약위0.2μm,함정이십완미효낭약위2-6 μm.홍외광보분석증명,벽재료취뇨시유TDI급EDA량충단체형성적.정이십완적포과효솔약위75%.미효낭적용점접근낭심이십완적용점,이기저열량재벽재고정시수낭심적량이변.열중분석표명,낭심정이십완、함정이십완적미효낭이급벽재료취뇨,능구내수적온도분별약위130℃、170℃급270℃
For heat energy storage application, polyurea microcapsules containing phase change material, n-eicosane, were synthesized by interfacial polymerization method with toluene-2,4-diisocyanate (TDI) and ethylene diamine (EDA) as monomers in an emulsion system. Poly (ethylene glycol) octyl-phenyl ether (OP), a nonionic surfactant,was the emulsifier for the system. The experiments indicated that TDI was reacted with EDA in a mass ratio of 1.9 to 1.The sizes of microcapsules were analyzed with TEM and laser particle analyzer, which showed the empty microcapsules were about 0.2 μm and those containing n-eicosane were 2-6 μm. FTIR spectra proved the formation of wall material, polyurea, from the two monomers, TDI and EDA. Encapsulation efficiency of n-eicosane was about 75%. Microcapsules of n-eicosane melted at a temperature close to that of n-eicosane, while its stored heat energy varied with the amount of core material n-eicosane. Thermogravimetric analysis revealed that the core material n-eicosane, micro-n-eicosane, and wall material polyurea could withstand temperatures up to 130 ℃, 170 ℃, and 270 ℃,respectively.