State Key Laboratory of Bio-fibers and Eco-textiles, Collaborative Innovation Center of Marine Biobased Fibers and Ecological textiles, College of Chemistry and Chemical Engineering, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China.
National Engineering Technology Research Center of Flame Retardant Materials, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 10081, China.
Carbohydr Polym. 2019 Feb 15;206:420-427. doi: 10.1016/j.carbpol.2018.10.058. Epub 2018 Oct 28.
Potassium-calcium carrageenan fibers were prepared in an eco-friendly fashion by wet spinning method. The forming process and flame retardant properties of this fiber compared with the traditional barium carrageenan fibers were studied in this paper. The results showed that the potassium ions were combined with the sulfate group in the carrageenan by ion bonding that made the potassium-calcium carrageenan fibers form a gel structure, which was a relative loose spatial network, while barium ions reacted with the sulfate groups of carrageenan to induce barium carrageenan fibers form a precipitated structure, which was a relative close spatial network. The limiting oxygen index, cone calorimeter, thermogravimetric analysis and pyrolysis-gas chromatography-mass spectrometry tests implied that K-Ca affected the pyrolysis behavior of potassium-calcium carrageenan fibers and catalyzed it to produce different pyrolysis products from Ba in barium carrageenan fibers. In addition, the pyrolysis mechanism of potassium-calcium carrageenan fibers was elucidated in this paper.
钾-钙卡拉胶纤维采用湿法纺丝法以环保的方式制备。本文研究了这种纤维的成型过程和阻燃性能，并与传统的钡卡拉胶纤维进行了比较。结果表明，钾离子通过离子键与卡拉胶中的硫酸基结合，使钾-钙卡拉胶纤维形成凝胶结构，这是一种相对松散的空间网络，而钡离子与卡拉胶中的硫酸基反应，诱导钡卡拉胶纤维形成沉淀结构，这是一种相对紧密的空间网络。极限氧指数、锥形量热仪、热重分析和热解-气相色谱-质谱联用测试表明，K-Ca 影响了钾-钙卡拉胶纤维的热解行为，并催化其产生不同于钡卡拉胶纤维中 Ba 的不同热解产物。此外，本文还阐述了钾-钙卡拉胶纤维的热解机制。
