Research progress on the interfacial compatibilizing of lignin/polyolefin composites

Lignin is the second most abundant renewable biomass resource in the plant kingdom only behind the cellulose. And its effective utilization has always been the focus of people's attention. The preparation of lignin/polyolefin composites by blending technology can not only improve the effective utilization of lignin, but also reduce the consumption of fossil energy and improve the environmental adaptability of polyolefin, which is a hot topic in recent years. However, there is a problem of poor interfacial adhesion between polyolefin and lignin, which affects the properties of composites directly, and thus improving their interfacial compatibility is very important to improve the performance of lignin/polyolefin composite. So, the structure and properties of lignin were introduced in this paper, and the reasons for the poor compatibility between lignin and polyolefin were also analyzed. Meanwhile, the research status and latest progress on lignin/polyolefin composites at home and abroad from the application of compatibilizing methods and blending process of composite materials were reviewed. The effects of compatibilizer, lignin modification method and blending process parameters on the interfacial compatibility of composites were discussed emphatically. In addition, based on the application of lignin/polyolefin composite in production and life, the development trend of interfacial compatibilization of lignin/polyolefin composite in the future was prospected. It was pointed out that searching for compatibilizers with low cost and excellent performance, compatibilizing materials multiply and introducing energy sacrifice bond would be the main research direction in the future. © 2020, Chemical Industry Press Co., Ltd. All right reserved.