Cellulose acetate butyrate is a synthetic cellulose with good properties and can be widely used in the plastics and coatings industries, such as: preparing film bases, aerial photography bases, films, Oil field and natural gas and other transmission pipelines, tool handles, glass lamps of cars and airplanes, underground telephone lines and cable tubes, steering wheels, sign surfaces, flash reflectors, etc. 1. The main method for synthesizing cellulose acetate butyrate is as follows: using sulfuric acid as a catalyst in a butyric acid/acetic acid/butyric anhydride reaction system. The degree of acetyl and butyryl substitution of cellulose acetate butyrate can be adjusted by the amount of organic acid or organic anhydride added
Advantages of cellulose acetate butyrate
Cellulose acetate butyrate has the advantages of good water resistance, weather resistance, film-forming flexibility, high transparency, and the ability to stabilize the directional arrangement of metals. Therefore, it can be used as the main film-forming material and is widely used in various wood products. Paints, glass coatings, plastic coatings and transparent paints are among the varnishes. At the same time, cellulose acetate butyrate coatings have good adhesion, flexibility, strength, resistance to moisture and grease, UV resistance and abrasion resistance, and provide excellent protection for difficult-to-disperse pigments such as carbon black and phthalein. A good dispersion medium for blue, phthalo green, etc., it is widely used in wood coatings.
Disadvantages of cellulose acetate butyrate
The disadvantages of cellulose acetate butyrate are poor antioxidant properties, easy hydrolysis, easy compaction, and weak antimicrobial erosion effect
Preparation method of cellulose acetate butyrate
The production method of cellulose acetate butyrate includes the following steps: treating fluffy wood pulp or cellulose acetate grade refined cotton with acetic acid for 1 to 4 hours; mixing butyric anhydride, acetic anhydride and concentrated sulfuric acid and cooling to -5~ 10℃, put the activated fluffy wood pulp or acetate-grade refined cotton into the above-mentioned cooled mixture, then add the solvent, and carry out the acylation reaction at 40~100℃ for 1~5h
The processing method of cellulose acetate butyrate products includes the following steps: add the discarded cellulose acetate butyrate products into the conditioning tank, and after 12 to 16 hours of treatment, enter the immobilized photosynthetic bacteria tank for 46 to 52 hours. Treatment; the effluent from the immobilized photosynthetic bacteria tank enters a sedimentation tank to settle for 2 to 3 hours, and then the settled water is discharged
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