Soy protein isolate nanocomposites reinforced with nanocellulose isolated from licorice residue: Water sensitivity and mechanical strength

作者：Han, Yingying; Yu, Miao; Wang, Lijuan^*

来源：Industrial Crops and Products, 2018, 117: 252-259.

DOI：10.1016/j.indcrop.2018.02.028

• Licorice residue nanocellulose
• Soy protein isolate
• Nanocomposite
• Water sensitivity
• Mechanical properties

The cellulose-rich residues of licorice are usually discarded as waste in many medicine factories, resulting in serious wastage of biomass. In this work, nanocellulose was extracted from licorice residue and the microstructure, particle size, crystallinity, and stability were investigated. The prepared licorice residue nanocellulose (LNC) was incorporated to soy protein isolate (SPI) for the production of eco-friendly nanocomposites. The effects of LNC content (0, 2, 4, 6, and 8 wt%) on the water sensitivity, mechanical and barrier properties of SPI films were characterized. The results revealed that LNC had a short rod-like structure (100-400 nm in length and 10-35 nm in diameter) and had high stability in aqueous media. LNC had a higher crystallinity degree than licorice residue cellulose. The addition of LNC significantly improved the properties of SPI films, especially at 6 wt%. At 6 wt% LNC, tensile strength and contact angle of SPI films increased by 35.4% and 20.3%, respectively, and monolayer moisture content, water vapor permeability, and oxygen permeability decreased by 44.4%, 27.2%, and 55.5%, respectively.

• 出版日期2018-7
• 单位东北林业大学