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Porous water-containing gel molded article, method for producing same, and use of same

一种制造方法、成型物的技术，应用在化学仪器和方法、可持续生物处理、生物水/污水处理等方向，能够解决不具有孔、不理想等问题，达到抑制负担、降低污浊物质及水量、栖息性良好的效果

Inactive Publication Date: 2014-08-20
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the obtained PVA molding does not have pores, therefore, the habitat area of ​​microorganisms is limited to the surface of the PVA molding, which is not ideal.

Method used

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  • Porous water-containing gel molded article, method for producing same, and use of same
  • Porous water-containing gel molded article, method for producing same, and use of same
  • Porous water-containing gel molded article, method for producing same, and use of same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0084] Water was added to PVA (manufactured by Kuraray Co., Ltd., average polymerization degree 1700, saponification degree 99.8 mol%) to a PVA concentration of 6.0 g / L, and the PVA was dissolved in hot water for 60 minutes. Sodium alginate was added to this PVA aqueous solution to make it 1 g / L, and it stirred and dissolved for 30 minutes. Furthermore, 50% glutaraldehyde aqueous solution was added to this aqueous solution so that the mole number with respect to the total monomer unit in PVA might become 3.7 mol%, Then, it mixed well and prepared the mixed aqueous solution. 100 g of this mixed aqueous solution was delivered at a rate of 5 mL / min by using a roller pump equipped with a silicone tube with an inner diameter of 3.2 mm and a nozzle with an inner diameter of 2 mm at the tip, and added dropwise to 1 L with stirring. In the primary coagulation liquid composed of a calcium chloride aqueous solution with a concentration of 0.1 mol / L that was stirred by a device. The add...

Embodiment 2

[0119] In Example 1, the sulfuric acid concentration of the secondary coagulation liquid (B) was 30 g / L, and the sodium sulfate concentration was 150 g / L, except that, by the same method as in Example 1, a gel molded product was produced ( C). As a result, a flexible spherical gel-shaped product (C) having a diameter of about 5.3 mm was obtained. Various measurements were performed in the same manner as in Example 1 for the obtained gel-formed product (C). The results are shown in Table 1.

Embodiment 3

[0121] In Example 1, modified starch was added to the mixed aqueous solution to make it 0.3g / L, and the concentration of sulfuric acid in the secondary coagulation liquid (B) was 30g / L, and the concentration of sodium sulfate was 150g / L. , By the same method as in Example 1, a gel molded product (C) was produced. As a result, a flexible spherical gel-shaped product (C) having a diameter of about 5.3 mm was obtained. The SEM photograph of the surface of the gel molding (C) of Example 3 is shown in Figure 8 . From the obtained SEM photograph, it can be seen that a large number of pores of about 2 to 20 μm exist on the surface of the gel-formed product (C) of Example 3. Various measurements were performed in the same manner as in Example 1 for the obtained gel-formed product (C). The results are shown in Table 1.

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PUM

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Abstract

Provided is a porous water-containing gel molded article that contains a poly(vinyl alcohol) that has been acetalized by means of a dialdehyde, and that is characterized in that the pore diameter of a freeze-dried product of the molded article is 0.1 to 50 [mu]m. Here, it is preferable for the porous water-containing gel molded article to further contain a water-soluble polysaccharide. It is preferable for the degree of acetalization of the poly(vinyl alcohol) to be 1 to 50 mol%. It is preferable for the porous water-containing gel molded article to be in the form of particles, with the sphere equivalent diameter of the particles being 1 to 20 mm. This type of porous water-containing gel molded article exhibits high strength and good inhabitation properties for microorganisms.

Description

technical field [0001] The present invention relates to a porous hydrogel-shaped article containing polyvinyl alcohol. In addition, the present invention relates to a production method and use of such a porous hydrogel-shaped product. Background technique [0002] Gel moldings made of polymer raw materials are used as carriers of biocatalysts, water retaining agents, cooling agents, substitutes for biogels such as eyes, skin, and joints, slow-release materials for drugs, and substrates for actuators , research on it is prevalent. Examples of polymer raw materials used as raw materials for these gel-formed products include agar, alginate, carrageenan, polyacrylamide, polyvinyl alcohol (PVA), photocurable resins, and the like. As a carrier used for wastewater treatment, etc., it is required to have a high water content, excellent oxygen and substrate permeability, and high affinity with living organisms. PVA is particularly excellent as a material satisfying these condition...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/26C02F3/10
CPCC08J9/28C08K3/20C08J2201/026C02F3/104C08J2405/04C02F3/109C08J2201/0504Y10T428/2982C02F3/10C02F3/108C08J2205/044C08J2329/04C08J2205/022C08J3/075Y02W10/10
Inventor 冈达也石跃新吉原资二
Owner KURARAY CO LTD
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