Cuprous oxide nanoparticle functionalized cellulose hydrogel as well as preparation method and application thereof

A cellulose hydrogel and nanoparticle technology, which is applied in cellulose coatings, antifouling/underwater coatings, biocide-containing paints, etc., can solve the adverse effects of nanocomposite gel mechanical properties and weaken the polymer chains Problems such as cross-link density and weak interaction can solve the effects of anti-fouling broad-spectrum, increase cross-link density, and strengthen mechanical strength

Pending Publication Date: 2022-07-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the weak interaction between nanoparticles and polymers, and the presence of nanoparticles weakens the crosslink density between polymer chains, it has an adverse effect on the mechanical properties of nanocomposite gels.

Method used

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  • Cuprous oxide nanoparticle functionalized cellulose hydrogel as well as preparation method and application thereof
  • Cuprous oxide nanoparticle functionalized cellulose hydrogel as well as preparation method and application thereof
  • Cuprous oxide nanoparticle functionalized cellulose hydrogel as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] This embodiment provides a method for doping cuprous oxide (Cu 2 O) prepared cuprous oxide nanoparticle functionalized cellulose hydrogel, the preparation method comprises the following steps:

[0051] (1) Prepare 80mL of 0.05mol / L copper sulfate dihydrate (CuSO 4 ·2H 20) solution, add 20mL 2mol / L sodium hydroxide solution dropwise, after the reaction for 2h, wait for the blue precipitate to separate out completely, add 0.88g ascorbic acid and stir for 2h, until the precipitate becomes orange-yellow, the precipitate is centrifuged (3500r / min, 15min ) and then washed with deionized water for 5 times until neutral to remove the residual impurities on the surface of the precipitate and inside, and finally the precipitate was centrifuged (3500r / min, 15min) and freeze-dried for 2 days to obtain cuprous oxide (Cu 2 O) Nanoparticles.

[0052] (2) Weigh 40g of cellulose solution, add 4mL of epichlorohydrin, then add 0.5g of cuprous oxide nanoparticles prepared in step (1), s...

Embodiment 2

[0054] The present embodiment provides a cuprous oxide nanoparticle-functionalized cellulose hydrogel prepared by doped tannic acid-encapsulated cuprous oxide nanoparticles by means of physical blending. The preparation method includes the following steps:

[0055] (1) Prepare 80mL 0.05mol / L copper sulfate dihydrate solution, add dropwise 20mL 2mol / L sodium hydroxide solution, react for 2h and wait for the blue precipitate to completely separate out, add 0.2g tannic acid and stir for 1h, wait for precipitation After completely turning into dark green, add 0.88g ascorbic acid and stir for 2h until the precipitate turns orange-yellow. The precipitate is centrifuged (3500r / min, 15min) and washed with deionized water for several times until it is neutral to remove the surface and interior of the precipitate. For the remaining impurities, the precipitate was finally centrifuged (3500 r / min, 15 min) and then freeze-dried for 2 days to obtain tannic acid-encapsulated cuprous oxide nan...

Embodiment 3

[0058] The present embodiment provides a pure cellulose hydrogel, and the preparation method includes the following steps:

[0059] Weigh 40 g of cellulose solution, add 4 mL of epichlorohydrin, stir at 30 °C for 30 minutes, and then place it in a 60 °C water bath and heat for 1 h to obtain a cellulose hydrogel. The hydrogel was soaked and washed in deionized water for 4 days, during which the water was changed every 8 h to remove the residual impurities on the surface and inside of the cellulose hydrogel.

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Abstract

The invention provides cuprous oxide nanoparticle functionalized cellulose hydrogel as well as a preparation method and application thereof. A cellulose hydrogel skeleton with a three-dimensional porous structure is used as an in-situ synthesized microreactor, and cuprous oxide is anchored on the surface and the inner wall of the cellulose hydrogel skeleton through static electricity and chelation by using active groups on a cellulose matrix. The tannic acid is used for packaging cuprous oxide, a bridge is built between a subject and an object, and the crosslinking density of the cellulose-based cuprous oxide nano composite hydrogel is increased, so that the mechanical strength of the cellulose-based cuprous oxide nano composite hydrogel is doubly enhanced. The cuprous oxide nano-particle functionalized cellulose hydrogel not only solves the problems of easy flocculation, high toxicity, difficult reuse and the like of nano copper oxide, but also overcomes the defects of poor antifouling broad-spectrum property, poor environmental durability and the like of cellulose hydrogel in the practical marine antifouling application process; the cuprous oxide nanoparticle functionalized cellulose hydrogel can be used for antifouling of marine organisms.

Description

technical field [0001] The invention belongs to the technical field of fiber material preparation, and particularly relates to a cuprous oxide nanoparticle functionalized cellulose hydrogel and a preparation method and application thereof. Background technique [0002] The attachment, colonization and growth of fouling organisms on the surface of marine structures can lead to a series of destructive effects such as slowing down the speed of ships, increasing fuel consumption, and serious biological corrosion. the Cu 2 The introduction of O (cuprous oxide) into cellulose hydrogels can not only solve the defects of cuprous oxide in practical applications such as easy flocculation, high toxicity, and difficulty in recycling, but also introduce the biocidal and antifouling strategy of cuprous oxide. Combined with the fouling inhibition strategy of cellulose hydrogel, the antifouling effect of "1+1>2" can be achieved. In addition, the poor mechanical properties of cellulose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L1/02C08K9/10C08K3/22C09D101/02C09D5/16
CPCC08J3/075C09D101/02C09D5/1618C08J2301/02C08K2003/2248C08K2201/011C08K9/10C08K3/22
Inventor 杨飞张霄冯郁成高德承
Owner SOUTH CHINA UNIV OF TECH
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