Toughened and modified cellulose diacetate material and preparation method thereof

Abstract

The invention discloses a toughened and modified cellulose diacetate material and a preparation method thereof. By means of the preparation method, granulates are extruded through a twin-screw extruder; the material is prepared from, by mass, 100 parts of cellulose diacetate, 5-50 parts of epoxy resin, 5-20 parts of camphor and 0.1-1 part of antioxidant. On the premise that certain strength and hardness are ensured, toughness is remarkably improved, transparency is good, cellulose diacetate thin film products can be formed through blow molding or solution plastic flow casting, and cellulose diacetate plastic products can also be produced through fusing. The material is simple in preparation method and beneficial to industrialization and can be widely used for spectacle frames, child toys, table tennis balls, thin films, 3D printing supplies, automobiles and domestic consumed materials and other daily plastic products.

Description

technical field [0001] The invention relates to the field of cellulose diacetate materials, in particular to a toughened and modified cellulose diacetate material and a preparation method thereof. Background technique [0002] Cellulose Acetate (Cellulose Acetate, or cellulose acetate, cellulose acetate), first prepared in 1865, is the acetate of cellulose. Cellulose diacetate refers to a thermoplastic resin obtained by esterifying acetic acid as a solvent and acetic anhydride as an acetylating agent under the action of a catalyst. It is the earliest commercial production of cellulose derivatives and is constantly developing. Cellulose organic acid ester. Cellulose is the main component of green plants. It is rich in resources and has a wide range of sources. It can be produced in large quantities by artificial cultivation. [0003] The cellulose diacetate molecular chain contains a large number of polar groups such as hydroxyl groups and acetyl groups. The molecular chain...

AI Technical Summary

Problems solved by technology

[0003] The cellulose diacetate molecular chain contains a large number of polar groups such as hydroxyl groups and acetyl groups. The molecular chain is rigid, the intermolecular interaction force is relatively large, and the mobility of the molecular chain segments is poor, which endows the cellulose diacetate material with Greater strength and hardness, but also makes the toughness of cellulose diacetate products particularly poor, the elongation at break of pure cellulose diacetate products is less than 10%

However, with the development of science, people found that although the acute toxicity of plasticizers is low, there is almost no acute poisoning performance after human poisoning, but this does not mean that it is safe. On the contrary, its chronic toxicity is quite harmful to humans.

[0005] At the same time, with the increase of the amount of plasticizer in the cellulose diacetate material, the toughness of the material is significantly improved, but its hardness and strength are particularly reduced.

Therefore, the addition of plasticizers has played a certain role in improving the processing technology of cellulose diacetate, but its comprehensive performance is not obvious