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Preparing process of cellulose-acrylate composite microsphere

A technology of acrylate and composite microspheres, which is applied in the field of preparation of composite microspheres to achieve good uniformity, easy control, and wide application prospects

Inactive Publication Date: 2007-06-27
JIANGSU QIANGLIN BIO ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At home and abroad, cellulose derivatives such as ethyl cellulose are generally used to synthesize polymer microspheres, and there is no report of directly using cellulose to synthesize cellulose acrylate composite microspheres.

Method used

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  • Preparing process of cellulose-acrylate composite microsphere

Examples

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preparation example Construction

[0019] A preparation method of cellulose acrylate composite microspheres:

[0020] In the first step, powdery cellulose and emulsifier are dispersed in water to form an aqueous phase;

[0021] In the second step, the acrylate is dispersed into an organic solvent to form an oil phase;

[0022] The third step is to add the oil phase to the water phase under the condition of stirring at a speed of 100-1000 rpm, raise the temperature to 55-65°C, and then add the persulfate initiator; continue to heat up to 65-90°C, and react 0.5~6 hours,

[0023] In this example, you can choose:

[0024] Add the oil phase to the water phase with stirring at a speed of 100 rpm, raise the temperature to 55°C, and then add the persulfate initiator; continue to heat up to 65°C, and react for 0.5 hours;

[0025] Add the oil phase to the water phase with stirring at a speed of 1000 rpm, raise the temperature to 65°C, and then add the persulfate initiator; continue to heat up to 90°C, and react for 6 ...

Embodiment 1

[0038] Weigh 70g of methyl methacrylate, 30g of isobutyl methacrylate and 120g of cyclohexane organic solvent and mix them into an oil phase.

[0039] Take 24g of 200-mesh microcrystalline cellulose, and add 60g of water containing 2g of polyoxyethylene nonylphenol ether and 0.5g of sodium dodecylsulfonate at a stirring speed of 200 rpm to form an aqueous phase. At the same stirring speed, add the oil phase. Heat up to 60°C, add 0.5g of ammonium persulfate initiator, continue to heat up to 70°C, and react for 3 hours. Cool to room temperature, filter out the liquid phase, wash with water, and dry at 80°C to form cellulose acrylate composite microspheres. See the attached table for the performance results of the samples.

Embodiment 2

[0041] The particle size of microcrystalline cellulose is 100 mesh, the amount of organic solvent cyclohexane used is 480g, the amount of water used is 480g, and the stirring speed is 500 rpm. Other formulas and processes are the same as in Example 1, and the prepared cellulose Acrylate composite microspheres, the performance results are shown in the attached table.

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Abstract

The preparation process of cellulose-acrylate composite microsphere includes the following steps: dispersing powdered cellulose and emulsifier in water to form water phase, dispersing acrylate in organic solvent to form oil phase, adding the oil phase into the water phase through stirring and heating before adding persulphate as initiator, further heating to 65-90 deg.c and reacting for 0.5-6 hr, cooling to room temperature, filtering to eliminate liquid phase, washing with water and stoving at 20-120 deg.c to obtain the cellulose-acrylate composite microsphere. The process is environment friendly, simple and feasible.

Description

technical field [0001] The present invention relates to a kind of preparation method of composite microsphere, more specifically, the present invention relates to a kind of preparation method of cellulose acrylate composite microsphere. Background technique [0002] Polymer microspheres refer to polymer materials or polymer composite materials with diameters ranging from nanometer to micrometer and spherical or other geometric shapes. Because of their special size and special structure, they play a special and key role in many important fields. Polymer microspheres mainly have the functions of micro-memory, micro-reactor, micro-separator and micro-structural unit. Microsphere materials are divided into two types: non-biodegradable and biodegradable. The former are composed of elastic polymers, such as polybutadiene, polyisoprene, etc., because of their high toxicity, difficult degradation and unsatisfactory slow-release effect, they tend to be eliminated. Biodegradable mic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F2/18
Inventor 储富祥陈日清王春鹏金立维段丽艳
Owner JIANGSU QIANGLIN BIO ENERGY
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