Cellulose-based dopa adhesive and preparation method thereof

A technology based on dopa-based adhesives and cellulose, which is applied in the field of cellulose-based dopa-based adhesives and its preparation, and can solve problems such as environmental and health hazards

Active Publication Date: 2018-09-28
FUJIAN AGRI & FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, while conventional adhesives meet the bonding requirements and faci

Method used

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  • Cellulose-based dopa adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 5g of cellulose into 1000mL N,N-dimethylacetamide / lithium chloride dissolution system, heat to 100°C in an oily pan and stir for 2 hours, then stir at room temperature for one day to obtain a cellulose solution, and use the cellulose solution to Centrifuge at 8000rpm for 15 minutes to remove a small amount of insoluble matter to obtain a cellulose solution. Use a separatory funnel to drop 10L of ultrapure water into the cellulose solution, gradually precipitate the cellulose and filter to obtain regenerated cellulose powder.

[0016] Weigh 4.5g of the prepared regenerated cellulose powder and disperse evenly with 450mL of ultrapure water, add 0.144g of TMEPO and 11.5g of NaBr, use 0.1mol / L sodium hydroxide solution or hydrochloric acid to control the pH value at 10.2, and add 103.5 mLNaClO solution and maintain the pH value at 10.2 until the pH value no longer changes, terminate the reaction with 5 mL absolute ethanol, and finally dialyze with a dialysis bag and free...

Embodiment 2

[0021] Add 5g of cellulose to 500mL of ionic liquid 1-butyl-3-methylimidazolium chloride, heat to 100°C in an oil pan and stir for 2 hours, then stir at room temperature for one day to obtain a cellulose solution, and centrifuge the cellulose solution Centrifuge at 8000rpm for 15 minutes to remove a small amount of insoluble matter to obtain a cellulose solution. Use a separatory funnel to drop 10L of ultrapure water into the cellulose solution, gradually precipitate the cellulose and filter to obtain a cellulose powder.

[0022] Weigh 4.5g of the prepared cellulose powder and disperse evenly with 450mL ultrapure water, add 0.144g TMEPO and 11.5g NaBr, control the pH value at 10.2 with 0.1mol / L sodium hydroxide solution or hydrochloric acid, and add 103.5mL NaClO after it is dissolved solution and maintain the pH value at 10.2 for reaction until the pH value no longer changes, terminate the reaction with 5 mL of absolute ethanol, and finally dialyze with a dialysis bag and free...

Embodiment 3

[0025] Dissolve 5.5g of commercially available oxidized cellulose (with a carboxyl content of more than 1.5mmol / g) in 550mL of 2-(N-morpholine)ethanesulfonic acid buffer, and after it dissolves, add 6.4g of N-hydroxysuccinimide (NHS) and 10.7g 1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide (EDC) to activate the carboxyl group for 1 hour, and finally add 10.5g dopamine hydrochloride to react at room temperature for 12 hours, then move to dialysis The bag was dialyzed and freeze-dried to obtain a cellulose-based dopa adhesive.

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Abstract

The present invention relates to an adhesive, and more particularly to a cellulose-based dopa adhesive and a preparation method thereof. The preparation method is characterized in that dopamine hydrochloride is grafted to oxidized cellulose in the form of amide bond by amidation. Also provided is a cellulose-based dopa adhesive prepared by the method. Dopa is combined with oxidized cellulose basedon the adhesion, water resistance, non-toxicity and biocompatibility of the dopa, and dopamine hydrochloride is used to graft the oxidized cellulose, imparting adhesion to the oxidized cellulose. Thus, a non-toxic, harmless and pollution-free adhesive is prepared. Due to the compatibility of dopa and the biodegradability of cellulose, the product can be applied to biomedical and other areas.

Description

technical field [0001] The invention relates to an adhesive, in particular to a cellulose-based dopa adhesive and a preparation method thereof. Background technique [0002] Adhesives have been widely used in daily life. Nowadays, people mainly use synthetic resin adhesives such as urea-formaldehyde glue, phenolic glue, and melamine-formaldehyde glue. However, while conventional adhesives meet the bonding requirements and facilitate daily life, they also cause great harm to the environment and health. For example, aldehyde adhesives will continuously release free formaldehyde, which can irritate people's eyes and respiratory tract, and can also induce bronchitis, liver lesions, carcinogenic and malignant tumors and other diseases. Neoprene adhesives contain a large amount of toxic volatile organic solvents. The epoxy bisphenol A in the epoxy resin adhesive is suspected to be an environmental hormone substance, and the amine compound curing agent is allergic to the human b...

Claims

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Application Information

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IPC IPC(8): C09J101/08C08B15/06C08B15/04
CPCC08B15/04C08B15/06C09J101/08
Inventor 吴慧汤祖武卢生昌肖禾曹石林黄六莲陈礼辉
Owner FUJIAN AGRI & FORESTRY UNIV
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