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Polyvinyl alcohol/ inorganic nanocomposite hydrogel and preparation method thereof

A technology of composite hydrogel and polyvinyl alcohol, which is applied in the field of polyvinyl alcohol/inorganic nanocomposite hydrogel and its preparation, can solve problems such as complicated procedures, inability to meet industrial production, and difficult operation of preparation methods, and achieve mechanical strength Good, excellent physical and chemical properties, the effect of improving permeability

Inactive Publication Date: 2013-04-10
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of polyvinyl alcohol composite hydrogel in the prior art is usually made by physical cross-linking gel method (repeated freezing-thawing method). The preparation method is not easy to operate and the process is complicated, which cannot meet the needs of industrial production; The cross-linked gel method is used to prepare polyethanol composite hydrogel, but it is often abandoned because the mechanical strength of the gel prepared by it is not as high as that prepared by the physical cross-linked gel method

Method used

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  • Polyvinyl alcohol/ inorganic nanocomposite hydrogel and preparation method thereof
  • Polyvinyl alcohol/ inorganic nanocomposite hydrogel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 A kind of polyvinyl alcohol / inorganic nanocomposite hydrogel

[0029] A polyvinyl alcohol / inorganic nanocomposite hydrogel is prepared in this way. Weigh 30g of polyvinyl alcohol and 50g of sodium alginate and dissolve them in 500 milliliters of distilled water to prepare a polyvinyl alcohol solution. Mix 3g of nano mica powder with polyethylene Mix the alcohol solution evenly, add 500g of curing agent boric acid aqueous solution (the mass percentages of boric acid and curing agent aluminum chloride are 3% and 0.1% respectively), soak and cure for 10 minutes, and obtain polyvinyl alcohol / inorganic nanocomposite hydrogel glue.

Embodiment 2

[0030] Embodiment 2 A kind of polyvinyl alcohol / inorganic nanocomposite hydrogel

[0031] A polyvinyl alcohol / inorganic nanocomposite hydrogel is prepared in this way. It takes 90 g of polyvinyl alcohol and 0.1 g of sodium alginate and dissolves it in 1000 milliliters of distilled water to prepare a polyvinyl alcohol solution with a specification of 2499. The heating temperature 90°C; mix 2.5g of nanoclay with polyvinyl alcohol solution evenly, drip into 1000g of curing agent boric acid aqueous solution (the mass percentages of boric acid and curing agent calcium nitrate are 5% and 1% respectively) through the injection needle, soak After curing for 200 minutes, the polyvinyl alcohol / inorganic nanocomposite hydrogel is obtained.

Embodiment 3

[0032] Embodiment 3 A kind of polyvinyl alcohol / inorganic nanocomposite hydrogel

[0033] A kind of polyvinyl alcohol / inorganic nanocomposite hydrogel is made in this way, taking specification is 1099 polyvinyl alcohol 60g, sodium alginate 24g heating and being dissolved in 800 milliliters of distilled waters to prepare polyvinyl alcohol solution, the temperature of heating is 95°C; mix 6g of nano-silica and polyvinyl alcohol solution evenly, squeeze out the mixed solution and drop it into 800g of curing agent boric acid aqueous solution (the mass percentage of boric acid is 4%, calcium chloride and chlorine in the curing agent aluminum chloride and calcium nitrate (1%, 6% and 3%), soaked and solidified for 600 minutes to obtain polyvinyl alcohol / inorganic nanocomposite hydrogel.

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Abstract

The invention discloses polyvinyl alcohol / inorganic nanocomposite hydrogel, which is characterized by being formed by the following components: 30-90 parts by weight of polyvinyl alcohol and 0.1-20 parts by weight of inorganic nanocomposite particles through a chemical crosslinking gel method, wherein the inorganic nanocomposite particles comprise nano clay, nano mica powder, a nano molecular sieve, nano wollastonite, nano graphite, nanosilicon dioxide or a carbon nano tube. With the adoption of the polyvinyl alcohol / inorganic nanocomposite hydrogel, the mechanical strength of polyvinyl alcohol hydrogel is enhanced on the basis of not influencing the moisture of the hydrogel, the service life is prolonged, the permeability of the polyvinyl alcohol hydrogel is improved, and a channel is reserved for transmission of matters. As the selection of the materials, the production cost is controlled, and the better economic benefit is brought. The invention also discloses a preparation method of the polyvinyl alcohol / inorganic nanocomposite hydrogel. The preparation method is simple and feasible to operate and good in mechanical strength, and can be produced industrially.

Description

technical field [0001] The invention relates to a polymer hydrogel and a preparation method thereof, in particular to a polyvinyl alcohol / inorganic nanocomposite hydrogel and a preparation method thereof. Background technique [0002] Polyvinyl alcohol hydrogel is chemically inactive, non-toxic, has good biocompatibility, excellent mechanical properties, high water absorption, and is easy to process and shape. It is widely used in agriculture, forestry, medicine, daily chemical industry, environmental protection and desert control. and other fields. In terms of agriculture, forestry and horticulture, polyvinyl alcohol gel has high water absorption and strong water retention, and can be used as a plant growth promoter, seedling transplanting preservative, etc., making it have broad application prospects in agriculture, forestry, and desert greening. In terms of medicine, polyvinyl alcohol gel has stable chemical properties and has similar physical properties to human tissue,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08L5/04C08K3/16C08K3/28C08K3/34C08K3/04C08K3/36C08K7/00C08K7/24C08J3/075C08J3/24
Inventor 叶林胡安杨张毅李贤玉黎园赵晓文李国武邢凯陈仕萍何志群
Owner CHINA PETROCHEMICAL CORP
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