溶胀剂对黏胶纤维催化脱水的影响The Effect of Swelling Agent on the Catalyst of Viscose Fiber
蔡蔚葵,陈惠芳
CAI Wei-kui,CHEN Hui-fang
摘要(Abstract)：
主要研究了不同浓度的乙二胺、尿素水溶液对黏胶纤维的溶胀作用,以及溶胀对催化剂催化效果的影响。通过保水值、吸碘值、~(13)C NMR和热失重分析等测试手段,对溶胀后的纤维性能进行了表征。结果发现:溶胀破坏了纤维内部的氢键结构,使分子链间距加大,催化剂分子更容易进入到纤维内部起到更好的催化效果。通过测定纤维的保水值和吸碘值,对比了乙二胺和尿素水溶液对黏胶纤维的溶胀效果,发现乙二胺对黏胶纤维的溶胀作用更强。~(13)C NMR结果表明,乙二胺对黏胶纤维有更大的消晶作用。热失重曲线表明:经乙二胺溶胀后的纤维的初始热失重温度进一步降低,有利于纤维在更低的温度下进行热处理,节约能耗。纤维强度测试结果表明,溶胀处理可以有效提高催化剂的催化效率。
The swelling behavior of ethylene diamine(EDA) and urea with different contraction on viscose fi-bers and the effect of swelling agent on the catalyst were investigated. Water retention value(WRV), iodinesorption value,13 C NMR and TGA were measured to characterize the fibers' properities. The results showedthat swelling disrupted the hydrogen bonds, and increased the interchain distances, which ensured the cata-lysts to reach into the internal structure easier. The WRV and ISV results declared that compared with theurea solution, the EDA solution had a greater influence on swelling. The NMR results indicated that theEDA-treated fiber had a higher intensity of the shifts associated with C4 non-crystalline than urea-treatedfiber. It could be explained that a certain degree of decrystallization occured after swelling, and the fibertreated with EDA had a greater impact. TGA results showed that after swelling the fibers' initial weight losstemperature decreased compared with that of non-swellen, which had a good effect on the low temperatureheat treatment process. The strength of heat treatment fiber increased to 3.0 c N/dtex from 2.7 c N/dtex,which evidenced swelling treatment could improve the catalytic efficiency.
关键词(KeyWords)：
黏胶纤维;黏胶基碳纤维;溶胀;催化;乙二胺;尿素
viscose fiber;viscose-based carbon fiber;swelling;catalyze;ethylene diamine;urea
基金项目(Foundation):
作者(Author):
蔡蔚葵,陈惠芳
CAI Wei-kui,CHEN Hui-fang
DOI: 10.16090/j.cnki.hcxw.2016.08.001
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