Preparation of PVA/paraffin thermal regulating fiber by in situ microencapsulation
Preparation of PVA/paraffin thermal regulating fiber by in situ microencapsulation
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DOI：
10.1016/j.compscitech.2008.04.004
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发表时间：
2008-08-01
影响因子：
9.1
通讯作者：
Xu, Jianjun
中科院分区：
文献类型：
--
作者：
Jiang, Mengjin;Song, Xiaoqing;Xu, Jianjun
采用原位微胶囊法制备调温纤维。通过对初生纤维进行预处理，促进正硅酸乙酯（TEOS）在石蜡/PVA界面的水解和缩聚反应，实现了石蜡在PVA（纤维基体）中的原位微胶囊化。通过模拟实验研究了正硅酸乙酯的水解缩聚反应机理。用扫描电镜、红外光谱、差示扫描量热仪和拉伸强度仪对热调节PVA纤维的结构和性能进行了表征。结果表明，在酸性条件下处理初生纤维时，PVA基体中形成了被TEOS水解产物紧密包裹的石蜡相。该方法制备的热调节PVA纤维具有较高的潜热值（23.7Jg（-1））和良好的潜热稳定性。纤维的机械性能也足够好，可用于纺织品。(C)2008爱思唯尔有限公司版权所有。
In situ microencapsulation, a novel method, was applied to prepare thermal regulating fiber. The In situ microencapsulation of paraffin in PVA (fiber matrix) was performed by treating the as-spun fiber to promote the hydrolysis and polycondensation of ethyl orthosilicate (TEOS) at the interface between paraffin and PVA matrix. The mechanism of hydrolysis and polycondensation of TEOS was studied by a simulation experiment. The structure and properties of the thermal regulating PVA fibers were characterized by SEM, IR, DSC and tensile strength tester. Results showed that the paraffin phases tightly wrapped by TEOS hydrolysates were present in the PVA matrix when the as-spun fibers were treated in the acidic condition. The thermal regulating PVA fiber prepared by this method has a relatively high latent heat value (23.7 J g(-1)) and good latent heat stability. The mechanical property of the fiber is also good enough for application in textile. (C) 2008 Elsevier Ltd. All rights reserved.