The Flame Retardant Material and Processing Technology Engineering Research Center of Hebei Province, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding, 071002, China.
Department of Basic Courses, Agriculture University of Hebei, Huanghua, 061100, China.
Carbohydr Polym. 2021 Mar 15;256:117575. doi: 10.1016/j.carbpol.2020.117575. Epub 2020 Dec 30.
Chitosan-modified zinc hydroxystannate (ZHS-CS) was synthesized using the cations of the biomaterial chitosan (CS) and ion replacement strategy. A ZHS-CS and reduced graphene oxide (rGO) hybrid flame retardant (ZHS-CS/rGO) was synthesized for use in flexible poly (vinyl chloride) (PVC). Scanning electron microscopy images indicated that ZHS-CS and rGO were evenly dispersed in ZHS-CS/rGO without agglomeration. Fourier transform infrared spectroscopy results showed that rGO was fully reduced. The flame-retardant and mechanical properties of PVC composites were investigated using the limiting oxygen index (LOI), a cone calorimeter, and mechanical equipment. By replacing one-fifth of the zinc ions in ZHS by chitosan cations to obtain Sn-4Zn-1CS/rGO, the ZHS-CS/rGO was found to improve PVC composite performance. The total heat release and total smoke release of PVC/Sn-4Zn-1CS/rGO were reduced by 24.2 and 40.0 %, respectively, from those of pure PVC.
壳聚糖改性锌羟基锡酸盐（ZHS-CS）是通过生物材料壳聚糖（CS）的阳离子和离子取代策略合成的。为了制备用于柔性聚氯乙烯（PVC）的阻燃剂，合成了 ZHS-CS 和还原氧化石墨烯（rGO）的混合物（ZHS-CS/rGO）。扫描电子显微镜图像表明 ZHS-CS 和 rGO 在 ZHS-CS/rGO 中均匀分散，没有团聚。傅里叶变换红外光谱结果表明 rGO 被完全还原。通过使用极限氧指数（LOI）、锥形量热仪和力学设备来研究 PVC 复合材料的阻燃和力学性能。通过用壳聚糖阳离子取代 ZHS 中五分之一的锌离子来获得 Sn-4Zn-1CS/rGO，发现 ZHS-CS/rGO 可以提高 PVC 复合材料的性能。与纯 PVC 相比，PVC/Sn-4Zn-1CS/rGO 的总放热量和总烟雾释放量分别降低了 24.2%和 40.0%。
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