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Hydrophobic slurry, and preparation method and application thereof

A hydrophobic and slurry technology, used in paper coatings, water repellent addition, no pigment coating, etc., can solve the problems of non-biodegradable resin, many chemicals, aggravating environmental pollution, etc., which is conducive to large-scale popularization and application, The effect of alleviating white pollution and high hydrophobicity

Active Publication Date: 2020-01-10
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the preparation of hydrophobic paper in the prior art uses chemical methods, such as organosilicon, organic fluorine and other reagents to modify the paper surface, or to graft hydrophobic polymers on the surface of the paper to modify the paper hydrophobically. The steps of the above methods are cumbersome. There are many chemicals required, the conditions are harsh, and industrialization is extremely difficult
In addition, it is conventional to impart hydrophobicity to paper products by coating / coating fluorine-containing silicon-containing hydrophobic coatings, but the above coating preparation process mainly uses fluorine-containing silicon-containing reagents to modify resins such as epoxy resin and acrylic resin, and then Adding various additives and fillers, the process is complicated, and most of the additives used are harmful to the environment, and the resin used is not biodegradable, which will aggravate environmental pollution

Method used

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  • Hydrophobic slurry, and preparation method and application thereof
  • Hydrophobic slurry, and preparation method and application thereof
  • Hydrophobic slurry, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] This embodiment provides a kind of hydrophobic slurry, which is specifically prepared by the following steps:

[0060] (1) Preparation of hydrophobic cellulose: crush the bleached kraft wood pulp into segmented materials with a length of 2-5 mm and a width of 1-2 mm, and vacuum-dry at 105° C. for 2 hours. Take 50g of dried cellulose (segmental kraft wood pulp), and mechanically compound 750g polytetrafluoroethylene (PTFE, molecular weight 5.2 million) in a QM-3SP4 planetary ball mill for 8 hours, and the grinding balls are 20mm (60g) in diameter, 10mm ( 220g), 6mm (260g) zirconia balls with a mass of 540g, the grinding speed is 540r / min. The composited cellulose powder was separated from excess PTFE with a stainless steel sieve to obtain 51 g of hydrophobic cellulose.

[0061] (2) Add 5g of film-forming agent polyvinyl butyral (PVB, molecular weight: 54,000) powder into 95g of ethyl acetate, stir and mix at room temperature to obtain a hydrophobic polymer solution (the...

Embodiment 2-4

[0065] Embodiment 2-4 provides a kind of hydrophobic slurry and hydrophobic paper respectively, and they are identical with the preparation method of embodiment 1, and difference only is:

[0066] In the step (2) of embodiment 2, the consumption of polyvinyl butyral is 1g, and the consumption of ethyl acetate is 99g (that is, the concentration of PVB in the hydrophobic polymer solution is 1%);

[0067] In the step (2) of embodiment 3, the consumption of polyvinyl butyral is 2g, the consumption of ethyl acetate is 98g (that is, the concentration of PVB in the hydrophobic polymer solution is 2%);

[0068] In the step (2) of Example 4, the consumption of polyvinyl butyral is 3 g, and the consumption of ethyl acetate is 97 g (that is, the concentration of PVB in the hydrophobic polymer solution is 3%).

Embodiment 5-8

[0070] Embodiments 5-8 respectively provide a hydrophobic slurry and hydrophobic paper, which are prepared in the same way as in Example 1, except that the hydrophobic polymer (film-forming agent) is ethyl cellulose (EC, molecular weight: 26,000):

[0071] In the step (2) of Example 5, the amount of EC was 1 g, and the amount of ethyl acetate was 99 g (that is, the concentration of EC in the hydrophobic polymer solution was 1%);

[0072] In the step (2) of Example 6, the amount of EC was 2 g, and the amount of ethyl acetate was 98 g (that is, the concentration of EC in the hydrophobic polymer solution was 2%);

[0073] In the step (2) of Example 7, the amount of EC was 3 g, and the amount of ethyl acetate was 97 g (that is, the concentration of EC in the hydrophobic polymer solution was 3%);

[0074] In the step (2) of Example 8, the amount of EC used is 5 g, and the amount of ethyl acetate used is 95 g (that is, the concentration of EC in the hydrophobic polymer solution is 5...

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Abstract

The invention relates to the technical field of high polymer materials, and particularly discloses hydrophobic slurry, and a preparation method and an application thereof. The hydrophobic slurry comprises hydrophobic cellulose and a hydrophobic polymer used as a film-forming agent; the hydrophobic cellulose is cellulose with the surface coated with a fluorine-containing polymer; the fluorine-containing polymer is one or more of polytetrafluoroethylene, polyvinylidene fluoride, a fluorinated ethylene propylene copolymer and an ethylene-chlorotrifluoroethylene copolymer; and the hydrophobic polymer is one or more of polyvinyl butyral, ethyl cellulose, polycaprolactone and polylactic acid. The hydrophobic slurry has the advantages of simple components, simplicity in preparation, no chemical modification, and realization of excellent hydrophobic property of a hydrophilic material. The invention also provides a preparation method of the hydrophobic slurry. The method is simple, and is beneficial to industrial production. The invention also provides a hydrophobic paper. The hydrophobic paper comprises the hydrophobic slurry, is simple to prepare, and has good hydrophobic and mechanical properties.

Description

technical field [0001] The invention relates to the field of polymer materials. Specifically, it relates to a hydrophobic slurry and its preparation method and application. Background technique [0002] Hydrophobicity is an important surface property of materials. Providing hydrophobic properties to solid materials in different ways can enable them to have new additional functions, obtain wider applications, and replace products with obvious defects in the prior art. [0003] For example, plastic products have good hydrophobic and water-repelling properties, and are widely used in various fields of production and life, but they are difficult to degrade, which brings increasingly serious white pollution, and it is imperative to limit their use. The preparation process of paper products is mature and degradable, and has been widely used in daily life to replace plastic products. However, paper-based materials (cartons, shopping bags, gift packaging boxes, etc.) It is very li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/20D21H19/34D21H19/28D21H21/16
CPCD21H19/20D21H19/34D21H19/28D21H21/16
Inventor 吴敏刘金凤李金培黄勇
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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