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Preparation method of cellulose-based self-reinforcing material

A technology of reinforcing materials and cellulose, which is applied in the field of preparation of cellulose-based self-reinforcing materials, can solve the problems that the anti-ultraviolet aging performance of materials needs to be improved, cellulose cannot realize full shielding in the ultraviolet region, and the anti-ultraviolet aging performance is insufficient, etc., to achieve Excellent UV full shielding performance, excellent anti-ultraviolet aging performance, and the effect of improving anti-ultraviolet aging performance

Pending Publication Date: 2021-08-10
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is still a problem that the ultraviolet modification of cellulose cannot achieve full shielding in the ultraviolet region, resulting in the need to improve the anti-ultraviolet aging performance of the material
However, its UV blocking performance in the 320-400nm wavelength range is poor (Biomacromolecules 2018, 19, 4565-4575), resulting in insufficient UV aging resistance

Method used

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  • Preparation method of cellulose-based self-reinforcing material
  • Preparation method of cellulose-based self-reinforcing material
  • Preparation method of cellulose-based self-reinforcing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of cellulose ether compounds: Take 10 g of 2% cellulose ionic liquid solution and add it to the reaction flask, and add 0.482g of 1-phenyl-2-propyn-1-one and 0.045g of dimethylaminopyridine (DMAP) were stirred at room temperature for 4 hours to obtain cellulose phenylpropyl ketene ether.

[0035] (2) Preparation and self-reinforcement of cellulose phenylpropyl ketene ether gel: Cast cellulose phenylpropyl ketene ether in the above step (1) into a plastic petri dish, store at 4°C for 3 hours, and finally Deionized water and ethanol washing purification obtained from reinforced cellulose phenylpropenyl ketene ether gel.

[0036] The self-reinforcing cellulose gel can also be obtained by irradiating the cellulose gel obtained above under a 365 nm ultraviolet lamp for 2 hours.

Embodiment 2

[0038] (1) Nanocellulose can be synthesized according to the synthesis method in the open literature (Yu, J. Cellulose 2019, 26(10), 6023-6034).

[0039] After solvent exchange, 0.162 g of nanocellulose (1 mmol AGU) was ultrasonically dispersed in DMF, and then 0.130 g of 1-phenyl-2-propyn-1-one (PPK, 1 mmol) and 0.012 g of dimethylaminopyridine (DMAP , 0.1 mmol) was added to the nanocellulose dispersion, and reacted for 4 hours at room temperature; finally, the nanocellulose phenylpropyl ketene ether (TOCNPPK) was obtained by ethanol washing and purification.

[0040] (2) Preparation and self-reinforcement of nanocellulose phenyl propyl ketene ether film: TOCNPPK film was prepared by solution casting method. Casting 0.4wt% nano-cellulose dispersion liquid into a tetrafluoroethylene mold, drying at 25-80° C. to constant weight, and obtaining a self-reinforced nano-cellulose phenylpropyl ketene ether film.

[0041] The self-reinforced nanocellulose film can also be obtained by...

Embodiment 3

[0044] (1) Nanocellulose phenyl propyl ketene ether (TOCNPPK) was prepared from Example 2.

[0045](2) Preparation and self-reinforcement of nanocellulose phenyl propyl ketene ether film: TOCNPPK film was prepared by solution casting method. The 0.3wt% nano-cellulose dispersion is cast into a tetrafluoroethylene mold, dried at 25-80° C. to constant weight, and the self-reinforced nano-cellulose phenylpropenyl ketene ether film is obtained.

[0046] The cellulose film obtained above can also be exposed to natural light for 2 hours to obtain a self-reinforced nanocellulose film.

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Abstract

The invention discloses a preparation method of a cellulose-based self-reinforcing material. The material is obtained by processing a cellulose ether derivative with a structure of a general formula (I) or a mixture of the cellulose ether derivative and a high-molecular polymer under the condition of natural light or ultraviolet light through a molding processing technology. The cellulose-based material prepared by the method has excellent ultraviolet light full-shielding performance and excellent mechanical performance. The mechanical property of the novel cellulose-based self-reinforcing material also has a self-reinforcing effect along with the prolonging of illumination time, and shows excellent ultraviolet aging resistance.

Description

technical field [0001] The invention relates to a polymer material and a preparation method thereof, in particular to a preparation method of a cellulose-based self-reinforcing material. Background technique [0002] High molecular polymer materials are widely used in pipes, packaging, mulch, wires and coatings due to their excellent chemical resistance, durability and low price. Polymer materials are natural polymer cellulose with renewable, biodegradable, excellent biocompatibility, rich content, excellent mechanical properties and optical properties, and have been widely used in packaging technology, films and composite materials, etc. aspect. Cellulose, nanocellulose and cellulose derivatives can effectively improve the mechanical properties of composite materials, broaden the application of polymer composite materials, and are the first choice for green and environmentally friendly polymer composite material reinforcements. In order to improve the anti-ultraviolet agi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/28C08J3/075C08L1/30C08J5/18C08L1/04C08L1/28C08L1/12C08J3/24C08L71/02C08L29/04C08L67/04C08L27/06C08L33/12C08L33/10
CPCC08J3/28C08J3/075C08J5/18C08J3/24C08J3/246C08J2301/30C08J2301/04C08J2301/28C08J2301/12C08J2471/02C08J2429/04C08J2467/04C08J2427/06C08J2433/12C08J2433/10
Inventor 俞娟李博文范一民刘亮
Owner NANJING FORESTRY UNIV
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