Preparation method of photoresponsive cinnamic acid derivative-grafted nanocellulose

A technology of cinnamic acid derivatives and nanocellulose is applied in the field of preparation of light-responsive cinnamic acid derivatives grafted nanocellulose, which can solve the problems of limiting the application range of nanocellulose and single surface functional group, and achieve good light-responsive performance. , high specific surface area, the effect of improving mechanical properties

Inactive Publication Date: 2019-04-12
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the relatively simple surface functional groups of nanocellulose, nanocellulose is mainly used as a nanofiller at p...

Method used

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  • Preparation method of photoresponsive cinnamic acid derivative-grafted nanocellulose
  • Preparation method of photoresponsive cinnamic acid derivative-grafted nanocellulose
  • Preparation method of photoresponsive cinnamic acid derivative-grafted nanocellulose

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Experimental program
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Effect test

Embodiment 1

[0022] (1) According to the material-to-liquid ratio of 1:70, the microcrystalline cellulose raw material was added to 70wt% sulfuric acid solution, and nanocellulose was prepared by ultrasonication at 65°C for 4 hours, and the nanocellulose solution was obtained by dialysis.

[0023] (2) Take 2g of NaIO 4 Dissolve in deionized water, add 0.1mol / L sulfuric acid to adjust pH=3.5. Add it to a nanocellulose solution with a certain solid content of 2g, add deionized water to make a cellulose solution with a mass concentration of 2%, and place it in a dark place at 40°C for 6 hours to react in the dark and avoid light to prepare dialdehyde nanofibers white.

[0024] (3) Dialyze the prepared dialdehyde nanocellulose for 2 days to remove sodium periodate, take a certain amount of solution and add DMF (N,N-dimethylformamide) centrifugation for 3-5 times to replace deionized water, DMF was then added to form a dialdehyde cellulose DMF solution with a mass concentration of 2%.

[0...

Embodiment 2

[0028] (1) According to the material-to-liquid ratio of 1:70, the recycled old paper fiber raw materials were added to 65wt% sulfuric acid solution, and nanocellulose was prepared by ultrasonication at 65°C for 4 hours, and the nanocellulose solution was obtained by dialysis.

[0029] (2) Take 4g of NaIO 4 Dissolve in deionized water, add 0.1mol / L sulfuric acid to adjust pH=3.5. Add it into a nanocellulose solution with a certain solid content of 2g, add deionized water to make a cellulose solution with a mass concentration of 2%, and place it in a dark place at 40°C for 6 hours while stirring and avoiding light.

[0030] (3) Dialyze the prepared dialdehyde nanocellulose for 2 days to remove sodium periodate, take a certain amount of solution and add DMF (N,N-dimethylformamide) centrifugation for 3-5 times to replace deionized water, DMF was then added to form a dialdehyde cellulose DMF solution with a mass concentration of 2%.

[0031] (4) Add 1 g of cinnamoyl chloride in...

Embodiment 3

[0034] (1) According to the material-to-liquid ratio of 1:70, the straw pulp fiber raw material was added to 55wt% sulfuric acid solution, and nanocellulose was prepared by ultrasonication at 65°C for 4 hours, and the nanocellulose solution was obtained by dialysis and rotary steaming.

[0035] (2) Take 6g of NaIO 4 Dissolve in deionized water, add 0.1mol / L sulfuric acid to adjust pH=3.5. Add it into a nanocellulose solution with a certain solid content of 2g, add deionized water to make a cellulose solution with a mass concentration of 2%, and place it in a dark place at 40°C for 6 hours while stirring and avoiding light.

[0036] (3) Dialyze the prepared dialdehyde nanocellulose for 2 days to remove sodium periodate, take a certain amount of solution and add DMF (N,N-dimethylformamide) to centrifuge for 3-5 times to replace deionized water. DMF was then added to form a dialdehyde cellulose DMF solution with a mass concentration of 2%.

[0037] (4) Add 1 g of cinnamoyl ch...

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Abstract

The invention belongs to the field of biomass functional polymer materials, and particularly relates to a preparation method of photoresponsive cinnamic acid derivative-grafted nanocellulose. According to the method, cellulose raw materials are added to a sulfuric acid solution, and nanocellulose is prepared under a certain temperature and ultrasonic condition; a nanocellulose solution is obtainedthrough dialysis and then reacts with sodium periodate to obtain dialdehyde nanocellulose; and cinnamoyl chloride and hydrazine hydrate react to prepare 3-phenylpropanehydrazide, and subsequently, the 3-phenylpropanehydrazide and an aldehyde group on the dialdehyde nanocellulose undergo a condensation reaction in a DMF solution, so that the cinnamic acid derivative-grafted nanocellulose is successfully prepared by connection of imine bonds. The nanocellulose of the invention can be used as a photoresponsive filler, is green, friendly to environment and high in safety, and has dual functions of improving mechanical properties and imparting light response performance.

Description

technical field [0001] The invention belongs to the field of biomass functional polymer materials, and in particular relates to a preparation method of photoresponsive cinnamic acid derivative grafted nano-cellulose. Background technique [0002] Cellulose is an abundant biomass resource that exists in nature. After physical and chemical treatment, cellulose can be conveniently obtained into nanocellulose with a reduced size. It has abundant hydroxyl groups, high specific surface area, excellent mechanical properties and degradability. , has received widespread attention in the development of new nanomaterials. However, due to the relatively simple surface functional groups of nanocellulose, nanocellulose is mainly used as a nanofiller at present, which only plays a role in enhancing the mechanical properties of materials, which limits the application range of nanocellulose. [0003] The cinnamic acid unit has good photoresponse performance, and under the irradiation of ult...

Claims

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Application Information

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IPC IPC(8): C08B15/06C08L29/04C08L1/08C08J5/18
CPCC08B15/06C08J5/18C08J2329/04C08J2401/08
Inventor 卢贝丽林强武羽岩林凤采黄彪刘杏熊明诚王梓洪碧云
Owner FUJIAN AGRI & FORESTRY UNIV
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