通过反应挤出连续、大规模且高比例制备生物启发型磷石膏复合材料

Continuous, Large-Scale, and High Proportion of Bioinspired Phosphogypsum Composites via Reactive Extrusion.

作者信息

Ran Jingyu, Su Xiangdong, Zhang Jiangang, Zhang Jie, Chen Jiajun, Liu Kun, Liu Zhao, Hu Yi, Sun Liqun, Jiang Deyong

机构信息

Guizhou Phosphogypsum Institute, Guizhou Institute of Technology, Guiyang 550003, China.

Key Laboratory of Light Metal Materials Processing of Guizhou Province, Guizhou Institute of Technology, Guiyang 550003, China.

出版信息

Materials (Basel). 2021 Sep 27;14(19):5601. doi: 10.3390/ma14195601.

DOI:10.3390/ma14195601

PMID:34639998

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8509489/

Abstract

Biological matter evolution provides an idea for the human design and synthesis of new materials. However, biomimetic materials only stay in laboratory-scale models, and their large-scale industrial applications are yet to be realized. Here, inspired by nacre's architecture, we report a continuous, large-scale method to fabricate phosphogypsum composites by reactive extrusion strategy. After curing for seven days, with more than 50 wt% of beta-hemihydrate phosphogypsum (β-HPG), the compressive strength and softening coefficient were 24.98 MPa and 0.78, increasing by 110.0% and 20.0%, respectively, compared to the pouring method. The results show that the screw extrusion process can improve the mechanical strength and waterproof properties of β-HPG hydration specimens without any special chemical admixtures and cements.

摘要

生物物质进化为人类设计和合成新材料提供了思路。然而，仿生材料仅停留在实验室规模的模型阶段，其大规模工业应用尚未实现。在此，受珍珠母结构的启发，我们报告了一种通过反应挤出策略制备磷石膏复合材料的连续、大规模方法。养护七天后，对于含有超过50 wt%的β-半水石膏（β-HPG）的材料，其抗压强度和软化系数分别为24.98 MPa和0.78，与浇筑法相比，分别提高了110.0%和20.0%。结果表明，螺杆挤出工艺可以在不添加任何特殊化学外加剂和水泥的情况下提高β-HPG水化试件的机械强度和防水性能。