Synthesis method of shell starch microsphere

A technology of starch microspheres and a synthesis method, which is applied in the field of synthesis of starch microspheres, can solve the problems of high cost, long synthesis time, high prices of monomers and additives, and achieves the effect of high deposition speed.

Inactive Publication Date: 2009-02-18
XIAN MEDICAL UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The current composite microspheres take too long to synthesize (generally more than 10 hours), and the monomers and additives used are also expensive, so the cost is too high. For a long time, it can only be used as a drug carrier, and cannot Fully applied in other fields
The traditional sol-gel process usually uses expensive titanium alkoxide as raw material, adding organic complexing agent to inhibit the hydrolysis of titanium, and adding strong acid to increase the stability of the sol system, the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: First, 0.4 parts of titanium dioxide, 0.004 parts of sodium silicate and 33 parts of deionized water were fully microwave-dispersed in parts by mass to obtain TiO 2 Gel; secondly, get 4.5 parts of soluble starch and deionized water into starch solution at a mass ratio of 1:8; then, mix 120 parts of cyclohexane, 1.2 parts of initiator, 2.8 parts of Stir the emulsifier to mix well, then add 10% volume of TiO to the mixture drop by drop 2 After gelling, add 1.2 parts of cross-linking agent N, N'-methylenebisacrylamide and starch solution, and react for 4 hours at 50°C with a stirring speed of 600r / min; the initiator is K 2 S 2 o 8 with NaHSO 3 mixture, where K 2 S 2 o 8 with NaHSO 3 The mass ratio is 1: 1; said emulsifier is a mixture of Span60 and Tween60, wherein the mass ratio of Span60 and Tween60 is 2: 1; finally, stop stirring, cool, let stand for 2h, and centrifuge to remove the oil phase, will get The precipitate was washed thoroughly with ethyl ...

Embodiment 2

[0007] Example 2: First, 0.6 parts of titanium dioxide, 0.004 parts of sodium silicate and 33 parts of deionized water were fully microwave-dispersed in parts by mass to obtain TiO 2 Gel; secondly, get 4.5 parts of soluble starch and deionized water into starch solution at a mass ratio of 1:8; then, mix 120 parts of cyclohexane, 1.2 parts of initiator, 2.8 parts of Stir the emulsifier to mix well, then add 10% volume of TiO to the mixture drop by drop 2 After gelling, add 1.2 parts of cross-linking agent N, N'-methylenebisacrylamide and starch solution, and react for 3 hours at 60°C with a stirring speed of 600r / min; the initiator is K 2 S 2 o 8 with NaHSO 3 mixture, where K 2 S 2 o 8 with NaHSO 3 The mass ratio is 1: 1; said emulsifier is a mixture of Span60 and Tween60, wherein the mass ratio of Span60 and Tween60 is 2: 1; finally, stop stirring, cool, let stand for 2h, and centrifuge to remove the oil phase, will get The precipitate was washed thoroughly with ethyl ...

Embodiment 3

[0008] Example 3: First, 0.5 parts of titanium dioxide, 0.004 parts of sodium silicate and 33 parts of deionized water were fully microwave-dispersed in parts by mass to obtain TiO 2 Gel; secondly, get 4.5 parts of soluble starch and deionized water into starch solution at a mass ratio of 1:8; then, mix 120 parts of cyclohexane, 1.2 parts of initiator, 2.8 parts of Stir the emulsifier to mix well, then add 10% volume of TiO to the mixture drop by drop 2 After gelling, add 1.2 parts of cross-linking agent N, N'-methylenebisacrylamide and starch solution, and react for 3.5 hours at 55°C with a stirring speed of 600r / min; the initiator is K2S 2 o 8 with NaHSO 3 A mixture where K2S 2 o 8 with NaHSO 3 The mass ratio is 1: 1; said emulsifier is a mixture of Span60 and Tween60, wherein the mass ratio of Span60 and Tween60 is 2: 1; finally, stop stirring, cool, let stand for 2h, and centrifuge to remove the oil phase, will get The precipitate was washed thoroughly with ethyl ace...

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PUM

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Abstract

This invention relates to a synthetic method of hud type starch microsphere. First carry out fully microwave dispersing to titanium dioxide, sodium silicate and de-ionized water, obtain TiO2 gel; blend soluble starch and de-ionized water, gain starch solution; intensive mixing cyclohexane, initiator, emulsifying agent, add TiO2 gel, then add cross-linking agent N, N -methylene bisacrylamide and starch solution, take reaction for 3 to 4 hours; finally stop whip, cooling, standing, by centrifugal to remove oil phase; use ethyl acetate, acetone, dehydrated alcohol in turns and abundantly to wash obtained precipitate, gain white go as far as yellowish product, vacuum drying.

Description

technical field [0001] The invention relates to a method for synthesizing starch microspheres, in particular to a method for synthesizing core-shell type starch microspheres. Background technique [0002] The current composite microspheres take too long to synthesize (generally more than 10 hours), and the monomers and additives used are also expensive, so the cost is too high. For a long time, it can only be used as a drug carrier, and cannot Other fields have been fully applied. The traditional sol-gel process usually uses expensive titanium alkoxide as a raw material, adding an organic complexing agent to inhibit the hydrolysis of titanium, and adding a strong acid to increase the stability of the sol system, and the cost is high. The present invention prepares cross-linked starch microspheres with cheap starch, and uses the cross-linked starch microspheres as the immobilized carrier of the wastewater treatment catalyst, thereby forming nano-TiO 2 Widespread application...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/12C08J3/24C08L3/02C08K5/20C08K3/34
Inventor 秦蓓李仲谨王磊韩敏陈丽田颖王景平黄凤芹赵强刘节根刘宝华
Owner XIAN MEDICAL UNIV
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