Fabrication of fire-retardant building materials via a hyper-crosslinking chemical conversion process from waste polystyrenes

Energy and Built Environment

Zhonghao Rao¹  Xiancong Shi²  Ding Gao²  Yuanhui Xie²  Changhui Liu² 

[1] Corresponding author.;School of Electrical and Power Engineering, China University of Mining and Technology, Xuzhou 221116, China;

关键词: Waste polystyrene;    Building materials;    Fire-retardant;    Hyper-crosslinking;    High-value added utilization;   

DOI  :  

来源: DOAJ

【 摘 要 】

Polystyrene (PS) is rich in plastic materials, but it produces a large amount of waste every year, causing a huge burden on the environment. Although PS plastic is the source of a common ''white pollution'' in daily life, it still has a high utilization value. At the same time, the flammability of PS material determines that it cannot be applicated in places where fire accidents occur frequently. As a result, its application has been greatly limited. In order to realize the efficient utilization of waste PS and broaden its scope of application, PS was modified by hyper-crosslinking in order to improve its fire-retardant performance. In this method, the PS solution with high purity was obtained by dissolving waste PS foam with 1,2-dichloroethane (DCE), and then the hyper-crosslinked polymer with high specific surface area was prepared by adding cross-linking agent formaldehyde dimethyl acetal (FDA) and a Lewis-acid catalyst ferric chloride (FeCl3). Further studies showed that the effects of the amount of cross-linking agent FDA, catalyst FeCl3 and PS on the reaction products were different. In addition, compared the as-prepared fire-retardant materials with PS foam from the aspects of flame retardancy and thermal insulation, it can be concluded that the fire-retardant performance of the materials prepared by this method has been significantly enhanced. And it is proved that this method is feasible towards the preparation of a large number of fire-retardant composite materials by using a scale-up experiment.

【 授权许可】

Unknown