Method for preparing easily mixed high filling clay/rubber nano composite material

A rubber nano-composite material technology is applied in the field of preparing clay/rubber nano-composite materials with easy mixing, high filling and high dispersion, and can solve the problems of difficult processing, long drying time, low drying and drying process efficiency, etc.

Active Publication Date: 2010-10-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method that can solve the problem that the composite material after flocculation is too small to be cleaned, filtered and dried under the high filling amount of clay, and the hardening of the composite material caused by drying and drying makes it difficult to process and dry later. Low process efficiency, long drying time, high thermal history of the product, and a certain degree of oxidation and aging are technical solutions; thus, it can be conveniently prepared and obtained, and the clay sheet is highly dispersed in the polymer matrix under high filling amount, which is easy for subsequent processing Composite materials

Method used

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  • Method for preparing easily mixed high filling clay/rubber nano composite material
  • Method for preparing easily mixed high filling clay/rubber nano composite material
  • Method for preparing easily mixed high filling clay/rubber nano composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 500 g of commercially available natural sodium-based bentonite into 10 L of deionized water, stir for 5 hours at a rotating speed of 800 r / min, and after standing for 24 hours, a clay / water suspension with a solid content of 2.0% is obtained; take 2000 g of clay / water Suspension, mix 15min with 500g styrene-butadiene rubber emulsion (SBR1502, solid content is 20%) under the rotating speed of 480r / min; The mixed solution is joined under stirring, and mass concentration is flocculation in the dilute sulfuric acid solution of 1%; The 5 μm-50 μm micelles of clay / styrene-butadiene rubber obtained by flocculation are repeatedly washed to neutrality; the water suspension of the flocculation gels is transferred to a spray drying device for spray drying treatment. The drying medium is simple hot air at 200 ° C. The outlet temperature is 100°C. The dried samples were collected to obtain a clay / styrene-butadiene rubber compound with a clay content of 40 phr.

[0024] The appe...

Embodiment 2

[0026] Add 500 g of commercially available natural sodium-based bentonite into 10 L of deionized water, stir for 5 hours at a speed of 800 r / min, and after standing for 72 hours, a clay / water suspension with a solid content of 2.0% is obtained; take 2000 g of clay / water Suspension, mix 15min with 217.4g nitrile rubber emulsion (N240S, solid content is 46%) under the rotating speed of 480r / min; The mixed solution is joined under stirring, and mass concentration is flocculation in the calcium chloride solution of 1% ;The 15μm-80μm micelles of clay / nitrile rubber obtained by flocculation are left standing repeatedly, washed with water until neutral; the water suspension of the flocculation gels is transferred to a spray drying device for spray drying treatment, and the drying medium It is pure hot air at 350°C, and the outlet temperature is 120°C. The dried samples were collected to obtain a clay / nitrile rubber mixed compound with a clay content of 40 phr.

[0027] The transmiss...

Embodiment 3

[0029] Add 500 g of commercially available natural sodium-based bentonite into 10 L of deionized water, stir for 5 hours at a speed of 800 r / min, and after standing for 72 hours, a clay / water suspension with a solid content of 2.0% is obtained; take 2000 g of clay / water Suspension, mixes 15min with 158.7g natural rubber emulsion (solid content is 63%) under the rotating speed of 480r / min; The mixed solution is joined under stirring, and mass concentration is flocculation in the aluminum chloride solution of 1%; Flocculation The 25μm-100μm micelles of the obtained clay / natural rubber were left standing repeatedly, washed with water until neutral; the water suspension of the flocculated gels was transferred to a spray drying device for spray drying treatment, and the drying medium was 100°C heat Air, using microwaves to heat atomized droplets to replenish energy, the outlet temperature is 80°C. The dried samples were collected to obtain a clay / natural rubber compound with a clay...

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Abstract

The invention discloses a method for preparing an easily mixed high filling clay / rubber nano composite material, which comprises the following steps of: blending rubber emulsion and clay / water suspension; breaking the emulsion by using electrolyte solution; forming flocculation granules of 1 to 100 microns; performing separation by using a hydraulic cyclone, washing and concentration; performing atomization and drying by using a spray drying process; and preparing powdery clay / rubber nano composite material with high clay filling quantity and high dispersion. The spray drying process solves the difficulty that the flocculated composite material with high clay filling part has fine colloidal particles and is not easy to filter and dry and the problem of difficult subsequent mixing and processing process and dispersion caused by hardening of the colloidal particles after the composite glue with high clay filling part is dried. Meanwhile, because the drying time of the product is shortened to dozens of seconds from several hours, the product has the advantages of low ageing, good dispersion and high performance.

Description

technical field [0001] The present invention provides an improved clay / rubber nanocomposite material for preparing easy-mixing, high-filling and high-dispersion clay / rubber nanocomposite technology (authorized Chinese invention patent: ZL98101496.8) based on the applicant's original invention of emulsion composite method clay / rubber nanocomposite technology Specifically, it is a method of using the spray drying process to solve the problem that the colloidal particles of the composite material after flocculation are small and difficult to filter and dry in the original emulsion composite method under the high filling fraction of clay, and the high filling fraction of clay in the original emulsion composite method The improvement method for the following problems such as difficulty in subsequent mixing and processing due to hardening of composite material particles after flocculation and drying, long drying time, low drying efficiency, and high thermal history of the product. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L9/08C08L13/02C08L11/02C08L9/04C08L23/22C08L9/10C08K3/34C08J3/12
Inventor 张立群陆明王益庆吴友平赖晨峰
Owner BEIJING UNIV OF CHEM TECH
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