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Method for preparing nano calcium carbonate/rubber composite materials

A technology of nano-calcium carbonate and composite materials, applied in the field of preparation of nano-calcium carbonate/rubber composite materials, can solve the problems of low material performance, high cost of composite material preparation, poor dispersion, etc., achieve good performance, reduce flying loss, low cost effect

Inactive Publication Date: 2007-10-17
华南热带农业大学 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Preparation of Nano-CaCO by Filling Method 3 / Rubber composite, nano CaCO 3 The degree of dispersion in the rubber matrix is ​​poor, and the performance of the material is low. The nano-CaCO used 3 The powder must be treated to prevent refocusing and stabilization, and the emulsion co-precipitation method also needs to make nano-CaCO 3 Re-drying for a second time, resulting in higher preparation costs for composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Digest CaO with water, wet grind, filter to remove impurities, and prepare 5% Ca(OH) 2 Emulsion, under stirring, add Ca(OH) 2 0.15% sodium polyphosphate and 0.2% disodium edetate by mass, after adding CO 2 Carry out carbonization, the carbonization temperature is 20 ℃, get unmodified nano-CaCO 3 suspension before adding nano-CaCO 3 2% sodium dodecylsulfonate by mass for wet surface modification to obtain nano-CaCO 3 Suspension; take the fresh natural rubber latex with a concentration of 30%, and add it to the nano-CaCO under stirring 3 In the suspension, add polyacrylamide and mix evenly, then add sucrose to coagulate, dehydrate the curd, and dry at 100°C to obtain nano-CaCO 3 / NR composites.

Embodiment 2

[0013] Prepare nanometer CaCO by the technique of embodiment 1 3 Suspension, take the styrene-butadiene latex with a concentration of 30%, and add it to the nano-CaCO under stirring 3 In the suspension, add polyacrylamide and mix evenly, then add aluminum potassium alum to solidify, dehydrate the clot, and dry it at 100°C to obtain nano calcium carbonate / styrene butadiene rubber composite material.

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Abstract

The invention discloses a method for preparing nanocalcium carbonate / rubber composite material, which takes calcium oxide, carbon dioxide and rubber latex as main stock, combining the preparing technology for nanocalcium carbonate and rubber together. The method comprises preparing the calcium hydroxide from calcium oxide, then adding carbon dioxide for charring and getting suspending liquid, then mixing the suspending liquid with rubber latex, through coprecipitation / coagulate, dehydration, drying etc getting the nanocalcium carbonate / rubber composite material.The method is characterized by the simple preparing process and the low production cost, the high performance because of the high degree of scatter of the the flying-off loss and nanocalcium carbonate and the decrease of the environmental pollution.

Description

technical field [0001] The invention relates to a preparation method of nano calcium carbonate / rubber composite material. Background technique [0002] Existing nano-CaCO 3 The preparation methods of rubber composite materials all adopt the filling method, which is divided into mixing filling method and emulsion filling co-precipitation method. The former is to mix nano-CaCO 3 Prepared by blending with solid rubber; the latter is prepared by nano-CaCO 3 Add latex and mix, and prepare through co-precipitation, drying and other processes. Preparation of Nano-CaCO by Filling Method 3 / Rubber composite, nano CaCO 3 The degree of dispersion in the rubber matrix is ​​poor, and the performance of the material is low. The nano-CaCO used 3 The powder must be treated to prevent refocusing and stabilization, and the emulsion co-precipitation method also needs to make nano-CaCO 3 Re-drying for the second time leads to higher preparation costs of composite mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/02C08L9/08C08L11/02C08L23/16C08L33/04C08K3/26
Inventor 符新王江赵同建符世泰孙玉清钟明霞王大辉符胥曾海青王琴
Owner 华南热带农业大学
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