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添加棕榈油精作为泡沫稳定剂制备偏高岭土基地质聚合物泡沫的表征与性能评价

Characterization and Performance Evaluation of Metakaolin-Based Geopolymer Foams Obtained by Adding Palm Olein as the Foam Stabilizer.

作者信息

Yu Qinglin, Li Xueying, Wang Zheng, Xue Jing

机构信息

School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China.

Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China.

出版信息

Materials (Basel). 2022 May 17;15(10):3570. doi: 10.3390/ma15103570.

DOI:10.3390/ma15103570
PMID:35629596
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9147785/
Abstract

Geopolymer foams with different pore structures can be used in construction, water treatment, and heavy metal adsorption. The preparation of high porosity geopolymer foams using vegetable oil as a foam stabilizer is a feasible and cost-effective route. In this study, metakaolin-based geopolymer foams with hierarchical pore structures were fabricated by adding HO as the foaming agent with palm olein as the foam stabilizer. The effects of HO and palm olein content on the chemical features and pore structure of geopolymer foams were evaluated. Water absorption, thermal conductivity, and mechanical behaviors of geopolymer foams were also investigated. The results indicate that fatty acid salt surfactants were generated in situ in the geopolymer matrix due to the addition of palm olein. Geopolymer foams with HO and palm olein addition possess a homogeneously concentrated macropore distribution. Palm olein exhibits a refining effect on intrinsic pores formed by geopolymerization. In addition, using appropriate amounts of palm olein and HO, geopolymer foams can achieve higher open porosity and better pore connectivity, resulting in the improvement of water absorption and thermal insulation capacity.

摘要

具有不同孔隙结构的地质聚合物泡沫可用于建筑、水处理和重金属吸附。以植物油作为泡沫稳定剂制备高孔隙率地质聚合物泡沫是一种可行且具有成本效益的途径。在本研究中，通过添加HO作为发泡剂、棕榈油精作为泡沫稳定剂，制备了具有分级孔隙结构的偏高岭土基地质聚合物泡沫。评估了HO和棕榈油精含量对地质聚合物泡沫化学特性和孔隙结构的影响。还研究了地质聚合物泡沫的吸水性、热导率和力学性能。结果表明，由于添加了棕榈油精，在地质聚合物基体中原位生成了脂肪酸盐表面活性剂。添加HO和棕榈油精的地质聚合物泡沫具有均匀集中的大孔分布。棕榈油精对由地质聚合形成的固有孔隙具有细化作用。此外，使用适量的棕榈油精和HO，地质聚合物泡沫可以实现更高的开孔率和更好的孔隙连通性，从而提高吸水性和保温能力。

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