Rational formulations of sustainable polyurethane/chitin/rosin composites reinforced with ZnO-doped-SiO2?nanoparticles for green packaging applications

编号 020031702

推送时间 20211115

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Rational formulations of sustainable polyurethane/chitin/rosin composites reinforced with ZnO-doped-SiO2?nanoparticles for green packaging applications

来源期刊 Food Chemistry

期 第317期

发表时间 20210920

关键词 Thermoplastic polyurethane;  Chitin;  Natural gum rosin;  Mechanical properties;  Flammability;  Antimicrobial activity; 

摘要 Polysaccharide chitin (CH) was modified by antimicrobial natural gum rosin as a biocompatible agent within the thermoplastic polyurethane (TPU) elastomer to form the TPU/CH composite. This blend was then mixed with different ratios of ZnO-doped-SiO2?nanoparticles (ZnO-SiO2-NPs) to chelate chitin and to improve the properties of TPU nanocomposites. The topology and surface roughness of chitin and nanoparticles within the TPU matrix, besides their effect on the crystallinity degree of TPU were characterized by scanning electron microscopy (SEM), atomic force microscopy (AFM), and X-ray diffraction (XRD). The TPU nanocomposites are subjected to different measurements such as mechanical, thermal, hydrophobicity, flammability, water vapor, and oxygen barrier properties, as well as antimicrobial activity. The results showed that the major properties were improved when the nanoparticles were added, especially at 5?wt%. Furthermore, the TPU/CH blend reinforced with high contents of NPs (i.e., 5–7?wt%) exhibited efficient antimicrobial activities against Gram-negative, Gram-positive bacteria and, pathogenic fungi.

服务人员 尚玮姣

服务院士 宋湛谦

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