Preparation method and application of cyclodextrin graft-immobilized cellulose acetate

A technology of cellulose acetate and cyclodextrin, applied in application, fiber treatment, plant fiber, etc., can solve the problem of high cost, achieve good safety, improve dyeing stability and dyeability, and achieve significant economic benefits

Inactive Publication Date: 2012-02-15
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 ace...

Method used

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  • Preparation method and application of cyclodextrin graft-immobilized cellulose acetate
  • Preparation method and application of cyclodextrin graft-immobilized cellulose acetate
  • Preparation method and application of cyclodextrin graft-immobilized cellulose acetate

Examples

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example 1

[0031] Weigh 100 g of β-cyclodextrin, 100 g of citric acid, 40 g of sodium dihydrogen phosphate, and dissolve 20 mL of polyethylene glycol in 1 liter of water to prepare β-cyclodextrin grafted cellulose acetate finishing solution. Take 10 g of cellulose diacetate, The two-dipping and two-rolling process is used to control the excess rate of 80%, then pre-baked at 90°C for 5 minutes, baked at 160°C for 2 minutes, soaked in water for 5 times, and dried naturally. The grafting rate of β-cyclodextrin in the product reaches 15%~25%.

example 2

[0033] Weigh 100g of β-cyclodextrin, 100g of citric acid, 40g of catalyst (disodium hydrogen phosphate) and 1 liter of water in a large beaker, fully stir the reaction at 120°C for 2 hours, take it out until the solution is cooled, and then place the mixture Reflux in ethanol solution for 6 hours to remove residual citric acid, catalyst and by-product impurities, finally dissolve the white solid product with a small amount of water, and precipitate it with acetone to obtain cyclodextrin and citric acid polymer. Weigh 100g of this polymer, dissolve 40g of sodium dihydrogen phosphate in 1 liter of water to prepare a finishing solution, take 10g of cellulose diacetate, adopt the process of double dipping and rolling, control the excess rate of 80%, and then pre-condition at 90°C Bake for 5 minutes, bake and react at 160°C for 2 minutes, soak in water for 5 times, and dry naturally. The grafting rate of β-cyclodextrin in the product reaches 20%-30%.

example 3

[0035]Weigh 200g of hydroxypropyl-β-cyclodextrin, 200g of citric acid, 100g of sodium hypophosphite, and dissolve 40mL of polyethylene glycol in 1 liter of water to prepare hydroxypropyl-β-cyclodextrin grafted cellulose acetate finishing solution , take 10g of cellulose diacetate, adopt the two-dipping and two-rolling process, control the excess rate of 90%, then pre-bake at 80°C for 7 minutes, bake at 170°C for 3 minutes, soak in water for 5 times, and naturally to dry. The grafting rate of hydroxypropyl-β-cyclodextrin in the product reaches 25%-40%.

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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...

Claims

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Application Information

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IPC IPC(8): D06M15/03D06M13/207A24D3/10D06M101/08
Inventor 李中皓周明珠侯宏卫唐纲岭陈再根陈欢姜兴益刘楠张洪非李雪邢军胡清源
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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