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Multifunctional cellulose film and preparation method thereof

A cellulose film and multi-functional technology, applied in the field of multi-functional cellulose film and its preparation, can solve the problems of complex experimental process, limited application range, and single performance, and achieve the effects of low energy consumption, simple synthesis, and low cost

Active Publication Date: 2018-08-10
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reagent fluorine-containing antifouling agent used contains certain toxicity, and the experimental process is complicated, so it is necessary to study a simple, green and pollution-free film-forming method
CN 103261287 A Prepared a cellulose acylate film with excellent mechanical and physical properties. The durability of the cellulose acylate film is greatly improved, but its single performance greatly limits its application range
Therefore, the prior art lacks a multifunctional cellulose film that is simple and green, has water resistance, oil resistance, ultraviolet absorption and environmental humidity sensitivity

Method used

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  • Multifunctional cellulose film and preparation method thereof
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  • Multifunctional cellulose film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) 2g of pulp cellulose is added to 50ml of a mixed solution containing 7wt% NaOH and 12wt% urea, after mixing evenly, the pulp cellulose suspension is obtained, and 2g of sodium periodate is added to the pulp cellulose under stirring In the suspension, use 2M hydrochloric acid solution to adjust the pH to 4, and oxidize at 50°C for 1 hour to obtain an oxidized pulp cellulose suspension; add 1 g of polyethyleneimine to the above pulp cellulose suspension for 3 hours of grafting reaction, Obtain a pulp cellulose suspension solution; the obtained pulp cellulose suspension solution is centrifuged at 10,000rpm for 10min, and the lower sediment is separated to obtain the lower sediment; the lower sediment is washed 4 times and filtered to obtain a relatively dry solid mixture, using a flat vulcanizer The solid mixture was heat-cured and pressed at 30° C. and 10 MPa for 10 minutes to obtain a multifunctional cellulose film.

[0027] (2) On the prepared multifunctional cellul...

Embodiment 2

[0033] (1)) 2g cotton cellulose is added to 50ml containing 7wt% NaOH and in the mixed solution that contains 12wt% urea, after mixing evenly, cotton cellulose suspension is obtained, 2g sodium periodate is added this cellulose under agitation In the suspension, use 2M hydrochloric acid solution to adjust the pH to 4, and oxidize at 50°C for 2 hours to obtain an oxidized cotton cellulose suspension; add 1 g of polyethyleneimine to the above cotton cellulose suspension to carry out grafting reaction for 3 hours, Obtain cotton cellulose suspension solution; Gained cotton cellulose suspension solution is centrifuged 10min under the condition of 10000rpm, separates and obtains lower layer sediment; Gained lower layer sediment obtains comparatively dry solid mixture after 4 times of suction filtration, and this solid mixture Heat curing and pressing at 90° C. and 10 MPa for 10 minutes to obtain a multifunctional cotton cellulose film.

[0034] (2) Cut a 2cm*1cm rectangular strip on...

Embodiment 3

[0040](1)) 2g cotton cellulose is added to 50ml containing 7wt% NaOH and in the mixed solution that contains 12wt% urea, after mixing evenly, cotton cellulose suspension is obtained, 2g sodium periodate is added this cellulose under agitation In the suspension, use 2M hydrochloric acid solution to adjust the pH to 4, and oxidize at 50°C for 2 hours to obtain an oxidized cotton cellulose suspension; add 1 g of polyethyleneimine to the above cotton cellulose suspension to carry out grafting reaction for 3 hours, Obtain cotton cellulose suspension solution; Gained cotton cellulose suspension solution is centrifuged 10min under the condition of 10000rpm, separates and obtains lower layer sediment; Gained lower layer sediment obtains comparatively dry solid mixture after 4 times of suction filtration, and this solid mixture Heat curing and pressing at 150° C. and 10 MPa for 10 minutes to obtain a multifunctional cotton cellulose film.

[0041] (2) Cut a 2cm*1cm rectangular strip on...

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Abstract

The invention discloses multifunctional cellulose film and a preparation method thereof. Cellulose is oxidized by sodium periodate and then is chemically grafted with polyethyleneimine, centrifugal separation is carried out on the reaction product, the obtained precipitate is washed, suction filtering is carried out, and heat curing is carried out for forming the multifunctional cellulose film. The cellulose membrane provided by the invention simultaneously has the properties of water resistance, oil resistance, ultraviolet absorption and environmental sensitivity, can be used for glass external walls, display outer screens, environmental humidity detectors and the like, and can exert the effect of ultraviolet absorption, stain prevention and scratch prevention.

Description

technical field [0001] The invention belongs to the field of self-cleaning material development, and in particular relates to a multifunctional cellulose film and a preparation method thereof. Background technique [0002] Plastic products are subject to structural changes due to the irradiation of ultraviolet rays from the sun, resulting in discoloration, brittleness and hardening, so the scope of application is limited. At present, with the expansion of the application field of polymer materials, ultraviolet absorbers are more and more widely used in the whole polymer additives. The ultraviolet absorber uses ultraviolet rays to carry out molecular rearrangement, and the hydroxyl group in a special position converts the absorbed ultraviolet rays into harmless heat energy to achieve a stable effect. However, ultraviolet absorbers only have the function of absorbing ultraviolet rays, and it is necessary to develop multifunctional materials that can absorb ultraviolet rays an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B15/06C08B15/02
CPCC08B15/02C08B15/06
Inventor 刘琳张连伟王瑞佳姚菊明
Owner ZHEJIANG SCI-TECH UNIV
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