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Preparation method of attapulgite/fluorinated polyurethane nanocomposite

A technology of nanocomposite materials and attapulgite, applied in the field of materials science, can solve the problems of poor thermal stability and mechanical properties, and achieve the effect of convenient and simple product processing, low cost and easy construction

Inactive Publication Date: 2016-08-10
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a preparation method of attapulgite / fluorine-containing polyurethane nanocomposite, and the preparation method of the attapulgite / fluorine-containing polyurethane nanocomposite needs to The technical problem of poor thermal stability and mechanical properties of pure fluorine-containing polyurethane in the prior art

Method used

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  • Preparation method of attapulgite/fluorinated polyurethane nanocomposite
  • Preparation method of attapulgite/fluorinated polyurethane nanocomposite

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Embodiment 1

[0022] A preparation method of attapulgite / fluorine-containing polyurethane composite material, comprising the steps of:

[0023] (1) Pretreatment of attapulgite

[0024] Purification and acidification treatment: Disperse 10g of attapulgite in deionized water, then add 0.5g of dispersant sodium hexametaphosphate, stir the mixed system at room temperature for 4 hours, discard the bottom residue, centrifuge the upper suspension, and dry And grind. Afterwards, acidify the purified attapulgite, disperse 5g of attapulgite in 50mL of 1mol / L HCl solution, stir the mixed system for one hour at room temperature, then centrifugally dry the mixed solution, grind and sieve.

[0025] (2) Organic modification of attapulgite

[0026] Modification of silane coupling agent KH550: first, hydrolyze the silane coupling agent, the solution system is ethanol, H2O, KH550 (volume ratio is 72:8:20), after stirring the system for 2 hours, adjust the pH value of the solution to 4-5. Add 50ml of ethan...

Embodiment 2

[0033] A preparation method of attapulgite / fluorine-containing polyurethane nanocomposite material, comprising the steps of:

[0034] (1) Pretreatment of attapulgite

[0035] Purification and acidification treatment: Disperse 10g of attapulgite in deionized water, then add 0.5g of dispersant sodium hexametaphosphate, stir the mixed system at room temperature for 4 hours, discard the bottom residue, centrifuge the upper suspension, and dry And grind. Afterwards, acidify the purified attapulgite, disperse 5 g of attapulgite in 50 mL of 1 mol / L HCl solution, stir the mixed system at room temperature for one hour, wash it alternately with acetone and deionized water until neutral, and mix The liquid was dried by centrifugation and ground and sieved.

[0036] (2) Organic modification of attapulgite

[0037] Modification of silane coupling agent KH550: first, hydrolyze the silane coupling agent, the solution system is ethanol, H2O, KH550 (72 / 8 / 20), after the system is stirred for...

Embodiment 3

[0041] A preparation method of a novel attapulgite / fluorine-containing polyurethane nanocomposite material, comprising the steps of:

[0042] (1) Pretreatment of attapulgite

[0043] Purification and acidification treatment: Disperse 10g of attapulgite in deionized water, then add 0.5g of dispersant sodium hexametaphosphate, stir the mixed system at room temperature for 4 hours, discard the bottom residue, centrifuge the upper suspension, and dry And grind. Afterwards, acidify the purified attapulgite, disperse 5 g of attapulgite in 50 mL of 1 mol / L HCl solution, stir the mixed system at room temperature for one hour, wash it alternately with acetone and deionized water until neutral, and mix The liquid was dried by centrifugation and ground and sieved.

[0044] (2) Organic modification of attapulgite

[0045] Modification of silane coupling agent KH550: first, hydrolyze the silane coupling agent, the solution system is ethanol, H2O, KH550 (72 / 8 / 20), after the system is sti...

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Abstract

The invention relates to a preparation method of an attapulgite / fluorinated polyurethane nanocomposite. The method comprises the steps of firstly, carrying out pretreatment on attapulgite, specifically, dispersing the attapulgite into deionized water, adding a dispersing agent-sodium hexametaphosphate into the deionized water, stirring and then centrifuging, drying and then grinding, acidizing the purified attapulgite, and then carrying out centrifugal drying and sieving; secondly, carrying out organic modification on the attapulgite, specifically, firstly hydrolyzing a silane coupling agent KH550, then adding alcohol and the pretreated attapulgite, carrying out a reflux reaction and then filtering, drying the obtained filter cake, grinding and sieving to obtain modified attapulgite; finally, evenly mixing fluorinated polyether polyol and the modified attapulgite in a nitrogen atmosphere condition, then adding isocyanate into the mixture, heating, carrying out a reaction and then vacuumizing, removing bubbles, adding a chain extender-triethanolamine, stirring and then molding by vacuum solidification. The preparation method is mild in conditions, simple and convenient in operation, easy in control of conditions and low in cost.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to a polymer-based nanocomposite material, in particular to a preparation method of attapulgite / fluorine-containing polyurethane nanocomposite material. Background technique [0002] Fluorine-containing polyurethane has experienced more than 50 years of development since it was first reported by Bayer in 1947 and the first patent in 1958. The introduction of fluorine-containing segments into the PU structure not only retains the high strength, high elasticity, high wear resistance, excellent low-temperature performance and bonding performance due to the polyurethane (PU) structure, but also has High heat resistance, weather resistance, chemical corrosion resistance, water and oil repellency, lubricity, stain resistance, good biocompatibility, etc. Therefore, FPU has broad application prospects and development space in the fields of national defense, military industry, and civilian us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/50C08G18/10C08G18/32C08K9/06C08K9/04C08K3/34
CPCC08G18/10C08G18/5015C08G18/7671C08K3/346C08K9/04C08K9/06C08K2201/011C08G18/3281
Inventor 李颖朱志强王霞李晓燕邹华吴成龙
Owner UNIV OF SHANGHAI FOR SCI & TECH
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