Full-biodegradable thermoplastic water-soluble film based on vinasse waste as well as preparation method and application of full-biodegradable thermoplastic water-soluble film

Abstract

The invention discloses a full-biodegradable thermoplastic water-soluble film based on vinasse waste and a preparation method and application thereof, and belongs to the technical field of forming and processing of full-biodegradable composites.The full-biodegradable thermoplastic water-soluble film is prepared through the steps that modified vinasse protein serves as a raw material, a plasticizer, a dissolution promoter, a reducing agent and a dynamic cross-linking agent are added, and stirring is conducted to obtain the full-biodegradable thermoplastic water-soluble film based on vinasse waste; the modified vinasse protein is obtained by carrying out double-screw thermoplastic extrusion processing and film blowing on vinasse protein separated and purified from vinasse waste and sequentially carrying out salinization, grafting modification and spray drying on the vinasse protein. The industrial preparation of the vinasse protein-based fully-degradable thermoplastic water-soluble film is realized, and compared with the existing petroleum-based polyvinyl alcohol (PVA) water-soluble film in the market, the vinasse protein-based fully-degradable thermoplastic water-soluble film is lower in preparation cost and higher in industrial operability while the basic performance requirements of the water-soluble film are met, so that the vinasse protein-based fully-degradable thermoplastic water-soluble film is suitable for industrial production. The high-molecular plastic processing system can be adapted to the existing high-molecular plastic processing system, and has lower carbon dioxide emission.

Description

technical field [0001] The invention relates to the technical field of molding and processing of fully biodegradable composite materials, in particular to a fully biodegradable thermoplastic water-soluble film based on distiller's grain waste and its preparation method and application. Background technique [0002] Distiller's grains are the largest source of waste for major brewing companies. For example, Maotai Town, Gujing Town, Yanghe Town, Budweiser Beer, Tsingtao Brewery and other wine companies in the three major towns of Shenjiu, there are countless distiller's grains waste every day. Utilization can not only effectively solve the problem of environmental pollution caused by the waste of distiller's grains, but also realize secondary profits. At present, the vast majority of enterprises or individuals have relatively simple and crude treatment methods for distiller's grains. Basically, they are simply dried and used as feed or fertilizer for direct sale, or even dire...

AI Technical Summary

Problems solved by technology

The film products prepared by casting method have high thickness precision, good transparency and gloss, but PVA needs to be dissolved at high temperature, and the drying energy consumption is large, the production cycle is long, the efficiency is low, and the cost is high, which greatly limits the production of polyvinyl alcohol. The application of thin films, and more importantly, PVA is a petroleum-based source. From the perspective of carbon footprint and life cycle assessment, water-soluble films based on PVA are not really environmentally friendly and do not conform to the strategy of sustainable green development. , so the development of fully degradable water-soluble films based on biomass sources is particularly urgent

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