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Preparation and Characterization of Clay Aerogel Composites Reinforced by Calcium Sulfate Whisker

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Clay aerogel has attracted much interests for potential applications such as aerospace, industry, and construction owing to its low density, high porosity, and large specific surface area. However, the application of clay aerogel is limited owing to their high fragility. In this study, calcium sulfate whisker (CSW) was employed to improve the mechanical properties of montmorillonite (MMT)-based clay aerogel through a simple environmentally friendly freeze-drying method. The CSW/clay aerogel composites were characterized by SEM, TGA, compression and thermal conductivity measurement. The experimental results showed that the addition of CSW could significantly change the microstructure, vastly enhance the mechanical properties, and slightly improve thermal insulation of the resultant CSW/clay aerogel composites. Particularly, compared with the neat clay aerogel, the best sample of CSW/clay aerogel composites presented an increased modulus by approximately 200% and a decreased thermal conductivity by approximately 14%.
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Keywords: Aerogel; Calcium Sulfate; Clay; Composites; Whisker

Document Type: Research Article

Affiliations: 1: Institute of Building Energy Efficiency, School of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdong, China 2: Guangdong Polytechnic of Environmental Protection Engineering, Foshan 528216, Guangdong, China 3: College of Chemical Engineering, Guangdong University of Petrochemical Technology, Maoming 525000, Guangdong, China

Publication date: November 1, 2018

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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