Journal
JOURNAL OF CLEANER PRODUCTION
Volume 165, Issue -, Pages 157-167Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jclepro.2017.07.067
Keywords
Lactide synthesis; Zinc oxide nanoparticle; Ring-opening polymerization; poly(lactic acid); Food waste
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Funding
- Hong Kong Research Institute of Textiles and Apparel (HKRITA)
- Innovation and Technology Commission for the Innovation and Technology Fund [ITP/002/14TP]
- Hong Kong Organic Waste Recycling Centre (HKOWRC)
- Central Textiles (HK) Ltd.
- Hong Kong Non-Woven Fabric Ind. Co. Ltd.
- Rizhao Kaishun Tire Co., Ltd.
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This study demonstrates the feasibility of poly(lactic acid) fibre production using fermentative lactic acid from food waste. Poly(lactic acid) was synthesized through ring-opening polymerization, in which the precursor lactide was produced by a novel catalytic method. Zinc oxide aqueous nanoparticle (30 - 40 nm) dispersion was applied as efficient catalyst due to its large surface area and rapid equilibrium between polymerization and depolymerization. Under optimal reaction conditions, lactide was produced at yields of 91-92% within 8 h, significantly improving the synthesis efficiency compared to the conventional tin-based catalytic method. The pure lactide product facilitated the conversion of food waste derived lactic acid to high molecular weight poly(lactic acid) (150,000 g mol(-1)), which was subsequently spun to fibres with promising tensile and thermal properties for potential applications in textile and bioplastics. (C) 2017 Elsevier Ltd. All rights reserved.
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