A facile low-cost method for fabricating water-based aerogel reinforced by calcium silicate waste with enhanced mechanical properties

IF 3.2 4区材料科学 Q2 CHEMISTRY, APPLIED

Journal of Porous Materials Pub Date : 2025-02-02 DOI:10.1007/s10934-025-01757-2

Hao Li, Yuan Liu, Bowen Zhou, Yijun Wang, Zhihua Zhang, Jun Shen

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引用次数: 0

Abstract

Silica aerogel attracted much attention from scientists due to its thermal conductivity and stability. In this study, water-based aerogels were prepared through a low-cost two-step acid–base method and ambient pressure drying, using porous calcium silicate waste as the reinforcement, silica sol and deionized water as precursor and solvent, respectively. Cetyltrimethylammonium bromide (CTAB) and polyethylene glycol (PEG600) served as surfactants and pore-forming agents, respectively. The accumulation of nanosheets provided by the calcium silicate waste reduces the shrinkage of aerogel, effectively shortens the preparation time, and improves Young’s modulus. The SC-20 and SC-40 exhibit densities of 259.5 and 296.2 mg·cm⁻³, thermal conductivities of 0.0361 and 0.0423 W·m⁻¹·K⁻¹, while also possessing Young's moduli as high as 1.99 and 4.47 MPa, respectively, which are higher than 1.11 MPa for SC-0. Conclusively, the aerogels reinforced by calcium silicate waste exhibited properties like good thermal insulation, low-cost, quick preparation, environmental friendliness, and high Young’s moduli, which would show potential for use in buildings.

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一种制备机械性能增强的硅酸钙废物增强水基气凝胶的简便低成本方法

二氧化硅气凝胶因其良好的导热性和稳定性而受到科学家的广泛关注。本研究以多孔硅酸钙废弃物为补强剂，硅溶胶为前驱体，去离子水为溶剂，采用低成本的两步法和常压干燥法制备水基气凝胶。十六烷基三甲基溴化铵（CTAB）和聚乙二醇（PEG600）分别作为表面活性剂和成孔剂。硅酸钙废弃物所提供的纳米片的积累减少了气凝胶的收缩，有效缩短了制备时间，提高了杨氏模量。SC-20和SC-40的密度分别为259.5和296.2 mg·cm−3，导热系数分别为0.0361和0.0423 W·m−1·K−1，杨氏模量分别高达1.99和4.47 MPa，高于SC-0的1.11 MPa。综上所述，硅酸钙废弃物增强气凝胶具有保温性能好、制备成本低、制备速度快、环境友好、杨氏模量高等特点，具有在建筑中应用的潜力。

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来源期刊

Journal of Porous Materials 工程技术-材料科学：综合

CiteScore

4.80

自引率

7.70%

发文量

203

审稿时长

2.6 months

期刊介绍： The Journal of Porous Materials is an interdisciplinary and international periodical devoted to all types of porous materials. Its aim is the rapid publication of high quality, peer-reviewed papers focused on the synthesis, processing, characterization and property evaluation of all porous materials. The objective is to establish a unique journal that will serve as a principal means of communication for the growing interdisciplinary field of porous materials. Porous materials include microporous materials with 50 nm pores. Examples of microporous materials are natural and synthetic molecular sieves, cationic and anionic clays, pillared clays, tobermorites, pillared Zr and Ti phosphates, spherosilicates, carbons, porous polymers, xerogels, etc. Mesoporous materials include synthetic molecular sieves, xerogels, aerogels, glasses, glass ceramics, porous polymers, etc.; while macroporous materials include ceramics, glass ceramics, porous polymers, aerogels, cement, etc. The porous materials can be crystalline, semicrystalline or noncrystalline, or combinations thereof. They can also be either organic, inorganic, or their composites. The overall objective of the journal is the establishment of one main forum covering the basic and applied aspects of all porous materials.