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纺丝原液原位合成相变材料微胶囊制备石蜡/PVA储能纤维

, PP. 79-84

Keywords: 聚乙烯醇,纺丝原液,原位聚合,石蜡,微胶囊,储能,纤维

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Abstract:

以聚乙烯醇(PVA)纺丝原液为分散介质,常温相变材料RT27石蜡为芯材,正硅酸乙酯(TEOS)为聚合单体形成SiO2囊壳,通过原位聚合直接制备含有石蜡微胶囊的PVA纺丝原液,之后通过湿法纺丝制备石蜡/PVA储能纤维。通过正交实验优化,结合粒径分布软件,分析各因素对微胶囊粒径的影响,选择适合纺丝的微胶囊合成条件。采用FTIR-ATR、SEM、EDS及TEM表征了纤维及微胶囊的化学成分及形态,通过DSC、TGA表征了微胶囊的包覆率、纤维的储能性及热稳定性。结果表明:PVA纺丝原液中合成了SiO2凝胶包裹的相变微胶囊,其平均粒径为1.39μm,大小及分布适合纺丝。纤维相变焓值为45.39J/g,石蜡包裹率高达94.72%,纺出纤维具有较高的储能性和较好的热稳定性。

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