Nanometer-graphene-modified blue-green alga based composite bio-plastic and preparing method thereof

Abstract

Nanometer-graphene-modified blue-green alga based composite bio-plastic is disclosed. The bio-plastic includes, by weight, 130-135 parts of blue-green algae, 9-10 parts of lactobacillus delbrueckii, 7-8 parts of pycnoporus sanguineus spore liquid, 16-17 parts of lactose, 9-10 parts of nanometer graphene, 10-11 parts of konjac glucomannan, 50-55 parts of pearl fibers, 56-57 parts of bamboo fibers, 24-25 parts of shell powder, 8-9 parts of vinyl methoxy silane, 7-8 parts of polyvinyl alcohol and a proper amount of water. The pearl fibers, the bamboo fibers and the shell powder in cooperation with a blue-green alga fermentation deep-processing product are adopted to prepare the bio-plastic under actions of a crosslinking agent that is the vinyl methoxy silane. The bio-plastic has biodegradability and has characteristics of high toughness and good tensile strength. The added nanometer graphene has an effect of enhancing a barrier property of the bio-plastic.

Description

technical field [0001] The invention relates to the technical field of cyanobacteria-based biodegradable plastics, in particular to a nano-graphene modified cyanobacteria-based composite bioplastic and a preparation method thereof. Background technique [0002] Lactic acid and polylactic acid are biochemical products, which use renewable biomaterials as raw materials and use bioengineering technology to make the products biodegradable. With the energy crisis caused by the depletion of petroleum resources and the increasingly serious environmental pollution caused by the chemical industry, it is of great significance to use biomass-based raw materials as substrates to produce lactic acid through microbial fermentation; Negative, without flagella, containing chlorophyll a, not forming chloroplasts, prokaryotes capable of oxygen-producing photosynthesis. Spirulina raw material fermentation has high value-added products such as lactic acid, L-lactic acid and other non-food prod...

AI Technical Summary

Problems solved by technology

Spirulina raw material fermentation has high value-added products such as lactic acid, L-lactic acid and other non-food products. These products can greatly improve the utilization value of cyanobacteria resources and prepare bioplastics. Wuxi Delin Seaweed Water Separation Technology Development Co., Ltd. has developed algae mud Algae powder technology with a moisture content below 10%, these algae powders are exported to the United States to be made into bioplastics at a low cost, and they lack the corresponding technology to directly realize the processing of cyanobacteria into bioplastics. Although they have favorable resources, they are not Benefits cannot be maximized; the domestic use of cyanobacteria is mostly focused on preparing cyanobacteria extracts, cyanobacteria proteins, cyanobacteria fibers and other cyanobacteria and other biomass, and then using the excellent properties of these biomasses combined with other raw materials to prepare some biofilms, and for cyanobacteria directly There are not many reports on the development and utilization of cyanobacteria-based bioplastics

[0003] The direct development and utilization of cyanobacteria to prepare cyanobacteria-based bioplastics usually faces the following two problems: (1), the conversion rate of cyanobacteria to lactic acid through fermentation of cyanobacteria raw materials, which directly determines the utilization efficiency of raw materials; (2), The performance improvement of bioplastics produced by the polymerization of lactic acid, L-lactic acid and polylactic acid

Single modification methods such as plasticization, acid adjustment, cross-linking, filling or blending are often used. However, this single modification method is limited, and the fully degradable plastic film prepared has a single function and high cost, which cannot realize the high-value development of cyanobacteria.