首页|Development of soy protein concentrate/hemp fiber-based biocomposite foams: Effects of alkaline treatment and poly(lactic acid) coating
Development of soy protein concentrate/hemp fiber-based biocomposite foams: Effects of alkaline treatment and poly(lactic acid) coating
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NSTL
Elsevier
? 2022 Elsevier B.V.Petroleum-based foams are used in packaging applications where thermal insulation and shock absorption are needed. However, their associated environmental problems motivate the development of bio-based alternatives. Here, biocomposite foams were prepared using soy protein concentrate (SPC) and alkali-treated hemp fibers. The hemp fibers were treated with 6% NaOH to remove non-cellulose components. The foams were coated by dipping in a poly(lactic acid) (PLA) solution. A concentration of 4% PLA was determined to be optimal for the coating. The mechanical and water barrier properties of the PLA-coated foams were evaluated. The compression modulus, compression strength, and bulk density of the PLA-coated foams were 1045.7 kPa, 2022.5 kPa, and 118.6 mg/mL, respectively, being significantly higher than those of the uncoated foams (404.0 kPa, 590.7 kPa, and 69.4 mg/mL). The moisture uptake and water uptake of the PLA-coated foams were significantly decreased by the coating procedure, indicating 16.2% and 138.3%, respectively. By contrast, the uncoated foams had a moisture uptake and water uptake of 31.8% and 1399.3%, respectively. The observed improvement in mechanical and water barrier properties is likely due to the hydrophobic nature of PLA.
BiocompositesCelluloseFoamsPoly(lactic acid)Soy protein concentrate
Kim B.S.、Garcia C.V.、Shin G.H.、Kim J.T.
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Department of Food Science and Technology Keimyung University
Independent Researcher
Department of Food and Nutrition Kunsan National University
Department of Food and Nutrition BioNanocomposite Research Center Kyung Hee University
NSTL
Elsevier
