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Micropore ligno-cellulose ultramicro powder, as well as preparation method and application thereof

A technology of lignocellulose and ultrafine powder, applied in lignin coating, fiber treatment, coating and other directions, can solve the problems of poor reactivity, microporous damage, damage to microporous structure, etc., to improve the aging resistance and improve the aging resistance. performance, the effect of reducing dosage

Inactive Publication Date: 2009-07-15
THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The microporous lignocellulose fine powder added in the prior art is a powder made by pulverizing wood blocks or wood cores whose main components are lignin and cellulose to a certain fineness (above 80 mesh), basically Natural raw materials are physically pulverized. On the one hand, in order to maintain the unique microporous structure in the raw material, it cannot be further refined to avoid damage to the microporous structure. On the other hand, when the pulverization reaches about 400 meshes, excessive viscosity and adhesion will occur. , and cannot continue to refine, the micropores are severely damaged
Third, because there is no modification treatment, the reactivity is poor, and the washing fastness of various properties is low. Therefore, the coating with larger particle size powder is not well bonded to the fabric, and the aging resistance is poor. Improve

Method used

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  • Micropore ligno-cellulose ultramicro powder, as well as preparation method and application thereof
  • Micropore ligno-cellulose ultramicro powder, as well as preparation method and application thereof
  • Micropore ligno-cellulose ultramicro powder, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] Preparation of the waterproof coating agent: add a certain amount (20wt%) of the superfine powder additive of the present invention in the normal polyurethane coating agent production process, and carry out the synthesis reaction according to the conventional process to obtain the waterproof coating agent.

[0039]Preparation of waterproof coated fabric: After the fabric is waterproofed and calendered, the waterproof coating agent is coated on the base fabric to make a coated fabric with waterproof and moisture permeability as a test product.

[0040] The related performance test of the coated fabric is carried out, and the test results are shown in Table 1.

[0041] Table 1:

[0042]

[0043] 4. Comparative experiment: Coating the same base cloth with ordinary PU waterproof and moisture-permeable coating glue to make a blank reference product; coating the same base cloth with ordinary PU glue with 20wt% ordinary fine powder (200 mesh) Covered to make a comparative ...

Embodiment 1

[0056] Embodiment 1: the preparation of superfine powder of hemp rod core

[0057] 1) Raw material crushing: the hemp rod core is crushed into a coarse powder of about 20 meshes with a jaw crusher.

[0058] 2) Pretreatment: Take 1kg of coarse powder and put it into a 50L stainless steel reaction kettle, add 100g of caustic soda, 10g of sodium sulfide and 5L of water, and stir for 6 hours at a temperature of 80°C; after filtering, centrifugally dry the precipitated powder and put it in a hot air furnace at 140°C drying to a moisture content of 1 wt%; natural cooling to obtain modified coarse powder.

[0059] 3) Refining treatment: Put the coarse powder into a Raymond mill to grind for 2 hours to a fine powder of 200 mesh, and control the particle size of the powder through wind screening.

[0060] 4) Activation treatment: Take 1kg of 200 mesh fine powder and put it into a 50L reactor, add 10kg of caustic soda solution with a concentration of 5g / l, stir at 50°C for 4 hours for ...

Embodiment 2

[0064] Embodiment 2: the preparation of superfine powder of bleached hemp rod core

[0065] The same operation as in Example 1, adding a bleaching process in step 2). The specific step 2) is: take 1 kg of coarse powder and put it into a 50 L stainless steel reaction kettle, add 100 g of caustic soda, 10 g of sodium sulfide, and 5 L of water, and stir for 6 hours at a temperature of 80 ° C; drain and rinse after filtering, and add 500 mL of hydrogen peroxide to the precipitate, Stir at 80-100°C for 3-30 hours; then, add an appropriate amount of acetic acid to neutralize, filter and wash with water until the precipitate reaches a pH of 5-8; dry the precipitated powder by centrifugation, and dry it in a hot air oven at 140°C until it reaches moisture Content 1wt%; natural cooling to obtain modified coarse powder.

[0066] Through this operation, bleached coarse powder can be obtained. The superfine powder obtained after the follow-up treatment of the coarse powder has a finenes...

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Abstract

The invention relates to microporous lignocelluloses submicron powder, the application method and the application thereof, belonging to the chemical industry field. The method takes materials containing microporous lignocelluloses as raw materials which are physically smashed and ground many times. The modification treatment is carried out on intermediate products by a chemical treatment method among each physical smashing and grinding process so as to obtain the submicron powder with the fineness of larger than 500 mesh and about one micrometer of micropores distributed on the powder. The submicron can serve as an industrial additive to be applied to textile functional coating, synthetic leather, paint, leather products coating, can increase the waterproof, moisture absorption, combining fastness and aging resistant performance of the products, has vapor permeability and extensive use.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a preparation method of modified lignocellulose fine powder that can be used as a functional additive, and the application of the product prepared by the method as an industrial additive. Background technique [0002] Functional additives in the chemical industry are very rich, generally added to certain chemical compositions to achieve or enhance the special properties of these chemical compositions, for example, applied to the surface coating of clothing textiles, can achieve or enhance moisture permeability, waterproof, etc. Effect. [0003] The applicant's previous patent application 200710145401.6 A waterproof and moisture-permeable coating agent composition and its application discloses a waterproof and moisture-permeable coating agent composition. A certain amount of microporous lignocellulose is added to the coating agent with waterproof function fine powder. The microp...

Claims

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Application Information

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IPC IPC(8): C08H5/04C08G18/64D06M15/01C09D197/02D06N3/00C08H8/00
Inventor 郝新敏张建春赵鹏程严欣宁樊丽君
Owner THE QUARTERMASTER EQUIPMENT RESEARCH INSTITUTE OF THE GENERAL LOGISITIC DEPARTME
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