Biomass nanometer cellulose modified blue-green algae based composite biological plastic and method for preparing same

Abstract

The invention discloses a biomass nanometer cellulose modified blue-green algae based composite biological plastic. The biomass nanometer cellulose modified blue-green algae based composite biological plastic comprises, by weight, 130-135 parts of blue-green alga, 13-14 parts of biomass nanometer celluloses, 8-9 parts of guar gum, 46-47 parts of milk protein fibers, 51-52 parts of mucilage glue based chitin fibers, 4-5 parts of nanometer silicon dioxide, 5-6 parts of citric acid glyceride, 2-3 parts of carbodiimide, 25-26 parts of polyethylene glycol 200 diacrylate and the like. The biomass nanometer cellulose modified blue-green algae based composite biological plastic has the advantages that the milk protein fibers, the mucilage glue based chitin fibers and the polyethylene glycol dipropyl olefine acid ester are matched with blue-green algae fermentation deep processing products, and the biomass nanometer cellulose modified blue-green algae based composite biological plastic is prepared from the milk protein fibers, the mucilage glue based chitin fibers, the polyethylene glycol dipropyl olefine acid ester and the blue-green algae fermentation deep processing products under the effects of cross-linking agents which are the citric acid glyceride and the carbodiimide, is biodegradable and is excellent in film-forming property and degradability; the added biomass nanometer celluloses are matched with the nanometer silicon dioxide, so that the structural stability of modified polylactic acid can be improved, and the mechanical properties of the biomass nanometer cellulose modified blue-green algae based composite biological plastic can be improved.

Description

technical field [0001] The invention relates to the technical field of cyanobacteria-based biodegradable plastics, in particular to a biomass nanocellulose 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-f...

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.