Development of novel building composites based on hemp and multi-functional silica matrix

Hussain, Atif, Calabria-Holley, Juliana, Lawrence, Mike, Ansell, Martin P., Jiang, Yunhong, Schorr, Diane and Blanchet, Pierre (2019) Development of novel building composites based on hemp and multi-functional silica matrix. Composites Part B: Engineering, 156. pp. 266-273. ISSN 1359-8368

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This study focuses on the development of novel bio-composites using a silica matrix that provides dual functionality: as a hydrophobic surface treatment and as a binder for hemp-shiv. The hydrophilic nature of hemp shiv, a plant based aggregate, results in composites having poor interfacial adhesion, weak mechanical properties and long drying times. In this work, sol-gel process has been utilised to manufacture durable low density hemp based composites. Morphological characterisation by scanning electron microscopy (SEM) showed that hemp shiv was embedded well in the matrix. Detailed chemical analysis using x-ray photoelectron spectroscopy (XPS) and gas chromatography-mass spectrometry (GC-MS) indicate the presence of water soluble and ethanol soluble extractives leached from the hemp shiv which are incorporated into the silica matrix inducing the binding effect. The composites were water resistant and showed good mechanical performance having the potential to develop novel thermal insulation building materials.

Item Type: Article
Uncontrolled Keywords: Hemp, B. Adhesion, D. Chemical analysis, Mechanical testing
Subjects: C100 Biology
C500 Microbiology
C700 Molecular Biology, Biophysics and Biochemistry
Department: Faculties > Health and Life Sciences > Applied Sciences
Depositing User: Rachel Branson
Date Deposited: 24 Feb 2020 15:34
Last Modified: 31 Jul 2021 19:45

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