Preparation method for degrading waste leather scraps to be used as graphene oxide less-lamella dispersant

Abstract

The invention discloses a preparation method for degrading waste leather scraps to be used as a graphene oxide less-lamella dispersant, and the preparation method comprises the following specific steps: firstly, respectively mixing the waste leather scraps with an alkali solution and alkali protease in sequence to carry out alkali degradation and enzyme degradation reaction to obtain a waste leather scrap degradation solution, and dialyzing the waste leather scrap degradation solution to degrade the waste leather scraps to prepare the graphene oxide less-lamella dispersant. The graphene oxideless-lamella dispersant is used in intercalation dispersion of carboxylated graphene oxide to prepare a graphene oxide less-lamella dispersant system, and the graphene oxide less-lamella dispersant system is subjected to freeze drying to obtain graphene oxide less- lamella powder. The preparation method has the advantages of easily available and cheap materials, simple and reasonable process, andthe product is used in the fields of reinforcement and toughening of adsorption materials, coatings with functions such as heat conduction, antistatic and corrosion prevention, polymers and cement-based composite materials and the like.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a preparation method for degrading waste dander as a graphene oxide few-lamellar dispersant. Background technique [0002] Waste dander is mainly small pieces of leather produced in the process of leather production and leather product manufacturing due to the process of trimming, slicing, smoothing, cutting samples, and grinding. There are about 1.4 million tons of waste dander produced in my country every year. Scraps are mainly disposed of through landfill, which not only pollutes the environment but also wastes resources. In recent years, the resource utilization of waste dander has been a hot issue of concern. At present, people use waste dander as a natural protein to prepare industrial gelatin, papermaking raw materials, leather retanning agents, foaming agents, emulsifiers, fertilizers, etc. (Ge Shuhua, Wang Quanjie, Diao Yi, Wang Xue, Yuan Yanluan. Re...

AI Technical Summary

Problems solved by technology

The physical method is mainly to treat it with ultrasonic and stirring. Such dispersion effect is short-lived and suitable for short-term application systems; the dispersant mainly used for intercalation dispersion intercalates and disperses graphene oxide, and dodecyl sulfonate is mainly used. Sodium citrate, sodium citrate, carboxymethyl chitosan and other anionic and cationic dispersants to form non-covalent intercalation complexes (Cai Yunan, Xu Chen, Sun Fengmei. Study on the dispersion of graphene in aqueous solution. Science and technology, 2014, (11): 220; Chen Yuanqing, Zhang Dawei, Gu Jiyou. Preparation and mechanical properties of functionalized graphene oxide / chitosan composite materials, Materials Heralds, 2015, 29 (6): 71-75; Xiong Xin, Wang Zhoufu , Ma Jing, et al. Research on rheological properties of graphene oxide dispersion. Artificial Crystal, 2013, 42 (5): 990-993), intercalation dispersion has the characteristics of simple process and low cost, but the formed graphene oxide In the dispersion system, there are mainly aggregates of few layers and multi-layers, and the uniformity and stability of the dispersion are poor.

The chemical graft modification method mainly forms a relatively stable graphene oxide dispersion system through the chemical reaction between the chemical group on the graphene oxide sheet and the substance containing the reactive chemical group, which can form a stable and uniform monolayer Dispersion system, when there are problems, the preparation process and process are complicated and the cost is high (Lai Changwei, Sun Ying, Yang Hong, etc. Functional modification of graphene and graphene oxide through "click chemistry". Acta Chemie Sinica, 2013, 71, 1201-1224)