Preparation method and application of cyclodextrin graft-immobilized cellulose acetate

Abstract

The invention relates to a preparation method of cyclodextrin graft-immobilized cellulose acetate. The preparation method comprises the following steps: a. preparation of cellulose acetate modification finishing liquid; b. leaching and rolling process; c. baking process; d. water washing for removing impurities; and e. drying. The cyclodextrin graft-immobilized cellulose acetate prepared by the method provided by the invention can be applied to cigarette filter tip materials and can be used for reducing harmful components such as benzene and benzene-series compounds, volatile phenol compounds, polycyclic arenes, heavy metals and the like in main smoke of the cigarette, or improving the dyeing stability and dyeability of cigarette cellulose acetate tows, or prolonging the fragrance of the cigarette filter tip and the sustained release of the fragrance. The preparation method has the advantages that: citric acid is used as a crosslinking agent, cyclodextrin is firstly grafted to cellulose acetate, and used citric acid is a food additive and has better safety; and for cigarette manufactures, by adoption of the modified cellulose acetate filter tip with a selective harm reducing effect, expensive composite shaping machine is not purchased, the cost is lowered and significant economic benefit is achieved.

Description

technical field [0001] The invention belongs to the modified preparation method and application field of cellulose acetate materials, and in particular relates to a synthesis process for preparing novel cyclodextrin grafted modified cellulose acetate tow, which is used for harm reduction of mainstream smoke in cigarettes, Application technology of tow dyeing and tow fragrance retention. Background technique [0002] Cyclodextrin (Cyclodextrin, CD) is a group of cyclic oligosaccharides combined with α-1,4 glycosidic bonds produced by cyclodextrin glucosyltransferase (CGT) on starch through biochemical action (Villiers in 1891 Discover). The most common ones are α-CD, β-CD, and γ-CD, which are composed of 6, 7 or 8 glucose units combined with α-1, 4 glycosidic bonds, and the hole diameters are 0.57, 0.78 and 0.95 nm. The molecular shape of cyclodextrin is a slightly cone-shaped nanoscale cavity structure with "hydrophobic inside and hydrophilic outside". It is this special...

AI Technical Summary

Problems solved by technology

[0005] The enhancement of public awareness of health and environmental protection and the awareness of the hazards of cigarettes have brought new challenges to cigarette harm reduction technology. For cigarette manufacturers, the use of modified acetate filters with selective harm reduction effects will not It is necessary to purchase an expensive compound molding machine, which is much lower than the cost of compound tip rods, and has significant economic benefits; in the dyeing of acetate tow, there are currently colored diacetate fiber cigarette tip rods in foreign countries. There is no such product; in addition, in terms of application research on aromatic cigarette tip sticks, domestic Changbaishan brand cigarettes increase the aroma of cigarettes by adding incense sticks to the cigarette tip sticks, but this method needs to be added during the molding process of the cigarette tip sticks. Complicated composite nozzle rod production process, the cost is relatively high

Images