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Method for preparing clay modified polyvinyl alcohol antifouling hydrogel

A technology of polyvinyl alcohol and clay, applied in the field of preparation of anti-sewage gel, can solve the problems of poor mechanical properties of hydrogel coating, complicated preparation process, expensive raw materials, etc., achieve excellent anti-fouling effect and simple preparation process , The effect that the raw material is easy to obtain

Inactive Publication Date: 2014-09-10
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are also Chinese patent documents "Preparation of a normal temperature curing antifouling and drag reducing hydrogel soft coating" (application number 201010549677.2), "an antifouling material and its application" (application number 201010589284.4), "a modified Silicone polymers, preparation methods and applications" (application number 201210362472.2) are all technologies related to antifouling gels. Although these hydrogel antifouling materials have obvious antifouling effects, the raw materials are expensive and costly. Complicated preparation process and poor mechanical properties of hydrogel coatings

Method used

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  • Method for preparing clay modified polyvinyl alcohol antifouling hydrogel
  • Method for preparing clay modified polyvinyl alcohol antifouling hydrogel
  • Method for preparing clay modified polyvinyl alcohol antifouling hydrogel

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Embodiment 1

[0021] Embodiment 1: take by weighing 4 parts of bentonite (accounting for the mass percent of whole composite hydrogel system), quantitatively add in the aqueous solution, make the clay disperse evenly in the solution, then add 10 parts of polyvinyl alcohol, make it fully dissolve, pass Preparation of clay-modified polyvinyl alcohol hydrogel by physical cross-linking method.

Embodiment 2

[0022] Embodiment 2: take by weighing 4 parts of kaolin (accounting for the mass percent of whole composite hydrogel system), quantitatively add in the aqueous solution, make the clay disperse evenly in the solution, then add 10 parts of polyvinyl alcohol, make it fully dissolve, repeat Clay-modified polyvinyl alcohol hydrogels were prepared through three freeze-thaw processes.

Embodiment 3

[0023] Embodiment 3: Weigh 4 parts of kaolin (accounting for the mass percentage of the whole composite hydrogel system), quantitatively add to the aqueous solution, and magnetically stir at room temperature for 2 hours to obtain a clay dispersion, and then ultrasonically 20min the suspension to make the clay in Disperse evenly in the solution, then add polyvinyl alcohol with a degree of polymerization of 1750 and a degree of alcoholysis of 50%, stir for 3 hours to fully dissolve, and repeat the freezing-thawing process three times to obtain a clay-modified polyvinyl alcohol hydrogel.

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Abstract

The invention provides a method for preparing clay modified polyvinyl alcohol antifouling hydrogel. The method comprises the following steps: (1) dissolving inorganic clay into deionized water, sufficiently dissolving to obtain suspension, and subsequently performing ultrasonic dispersion on the suspension, so as to obtain uniform clay dispersion liquid; (2) adding polyvinyl alcohol into the clay dispersion liquid, and stirring for 2-3 hours at 80-100 DEG C, so as to obtain a clay modified polyvinyl alcohol hydrogel mixture solution; and (3) repeating a freezing-unfreezing process on the clay modified polyvinyl alcohol hydrogel mixture solution for at least three times, so as to prepare the clay modified polyvinyl alcohol antifouling hydrogel. The method is simple in preparation process, the raw materials are easy to obtain, and the preparation cost is low. The hydrogel system has an excellent antifouling effect, is capable of effectively inhibiting adhesion of protein and marine algae and has a good application prospect in the field of ship antifouling materials.

Description

technical field [0001] The invention relates to a preparation method of a sewage-repellent gel, in particular to a preparation method of a clay-modified polyvinyl alcohol-repellent sewage gel with good mechanical properties. Background technique [0002] Marine fouling organisms refer to the general term of animals, plants and microorganisms attached to the surface of ships and other facilities in the ocean. These bacteria, algae, various microorganisms, marine animals and plants adhere to and grow on the surface of marine facilities. This phenomenon is called biofouling. In recent years, marine-related industries (including mariculture, seabed oil and seabed minerals, marine power generation, etc.) have developed rapidly, and people have begun to pay more and more attention to marine biofouling. How to effectively prevent marine biofouling has become a One of the most important problems to be solved in the development of marine industry today. [0003] Traditional antifou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08L29/04C08K3/34
Inventor 王君陈蓉蓉刘连河韩娇侯梦洁
Owner HARBIN ENG UNIV
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