Please use this identifier to cite or link to this item: https://doi.org/10.3390/gels4020043
Title: Advanced Recycled Polyethylene Terephthalate Aerogels from Plastic Waste for Acoustic and Thermal Insulation Applications.
Authors: Koh, Hong Wei
Le, Duyen K 
Ng, Gek Nian
Zhang, Xiwen 
Phan-Thien, Nhan 
Kureemun, Umeyr 
Duong, Hai M 
Keywords: acoustic insulation
aerogels
mechanical property
plastic waste
recycled PET fiber
thermal insulation
Issue Date: 17-May-2018
Publisher: MDPI AG
Citation: Koh, Hong Wei, Le, Duyen K, Ng, Gek Nian, Zhang, Xiwen, Phan-Thien, Nhan, Kureemun, Umeyr, Duong, Hai M (2018-05-17). Advanced Recycled Polyethylene Terephthalate Aerogels from Plastic Waste for Acoustic and Thermal Insulation Applications.. Gels 4 (2) : 43-43. ScholarBank@NUS Repository. https://doi.org/10.3390/gels4020043
Abstract: This work presents for the first time, a simple, practical and scalable approach to fabricating recycled polyethylene terephthalate (rPET) aerogels for thermal and acoustic insulation applications. The rPET aerogels were successfully developed from recycled PET fibers and polyvinyl alcohol (PVA) and glutaraldehyde (GA) cross-linkers using a freeze-drying process. The effects of various PET fiber concentrations (0.5, 1.0 and 2.0 by wt.%), fiber deniers (3D, 7D and 15D) and fiber lengths (32 mm and 64 mm) on the rPET aerogel structures and multi-properties were comprehensively investigated. The developed rPET aerogels showed a highly porous network structure (98.3⁻99.5%), ultra-low densities (0.007⁻0.026 g/cm³), hydrophobicity with water contact angles of 120.7⁻149.8°, and high elasticity with low compressive Young's modulus (1.16⁻2.87 kPa). They exhibited superior thermal insulation capability with low thermal conductivities of 0.035⁻0.038 W/m.K, which are highly competitive with recycled cellulose and silica-cellulose aerogels and better than mineral wool and polystyrene. The acoustic absorption results were also found to outperform a commercial acoustic foam absorber across a range of frequencies.
Source Title: Gels
URI: https://scholarbank.nus.edu.sg/handle/10635/155199
ISSN: 2310-2861
2310-2861
DOI: 10.3390/gels4020043
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