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In-situ polymerization method of nano starch/SiO2 composite particles

A technology of composite particles and nano-starch, which is applied in the direction of silicon oxide, etc., can solve problems such as in-situ polymerization of composite particles that have not yet been seen, and achieve good market application prospects, simple preparation methods, and low prices.

Inactive Publication Date: 2013-11-13
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, only nano-starch and nano-SiO 2 The powder mechanical mixing preparation process has not yet seen the relevant nano-starch / SiO 2 In situ polymerization of composite particles reported

Method used

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  • In-situ polymerization method of nano starch/SiO2 composite particles
  • In-situ polymerization method of nano starch/SiO2 composite particles
  • In-situ polymerization method of nano starch/SiO2 composite particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Starch hydrolysis

[0023] Weigh 10g of starch, add 90ml of distilled water, heat and stir in a water bath at 90°C, gelatinize for 10 minutes, add 15ml of 37% HCl solution, continue heating and stirring to form a transparent starch hydrolyzate, then add 1.5g of NaCl, Let cool and set aside.

[0024] 2. In situ polymerization

[0025] Weigh 35g of industrial water glass with a Baume degree of 0.45 and a modulus of 2.8, add 140ml of water to dilute it into a 20% aqueous solution, settle it statically, take the supernatant, and then press nano starch / SiO 2 10% of the theoretical output of composite particles is added to Si69, according to nano starch / SiO 2 Add 1.5% of the theoretical output of composite particles into sodium dodecyl sulfonate; under the condition of heating in a water bath at 90°C, control the dropping rate of 70 drops / min, add dropwise to the starch hydrolyzate and keep stirring. After the reaction, use HCl Or adjust the pH value to 6 with NaOH, age...

Embodiment 2

[0029] 1. Starch hydrolysis

[0030] Weigh 5g of starch, add 95ml of distilled water, heat and stir in 80°C water bath, gelatinize for 10min, add 12.5ml of 37% HCl solution, continue heating and stirring to form a transparent solution, then add 1.2g of NaCl, cool, and set aside.

[0031] 2. In situ polymerization

[0032] Weigh 35g of industrial water glass with a Baume degree of 0.45 and a modulus of 2.8, add 100ml of water to dilute it into a 25% aqueous solution, settle statically, take the supernatant, and then, press nano-starch / SiO 2 15% of the theoretical output of composite particles is added to KH550, according to nano starch / SiO 2 Add 0.8% of the theoretical output of composite particles into sodium dodecylbenzenesulfonate; under the condition of heating in a water bath at 85°C, control the dropping rate of 60 drops / min, add dropwise into the starch hydrolyzate and keep stirring. After the reaction is over, Use HCl or NaOH to adjust the pH value to 5.5, age for 2h,...

Embodiment 3

[0036] 1. Starch hydrolysis

[0037] Weigh 20g of starch, add 90ml of distilled water, heat and stir in a water bath at 85°C, gelatinize for 10 minutes, add 17.5ml of 37% HCl solution, continue heating and stirring to form a transparent solution, then add 1.3g of NaCl, cool, and set aside.

[0038] 2. In situ polymerization

[0039] Weigh 35g of industrial water glass with a Baume degree of 0.45 and a modulus of 2.8, add 160ml of water to dilute it into an 18% aqueous solution, settle still, take the supernatant, and then press nano starch / SiO 2 Add Si69 to 8% of the theoretical output of composite particles, according to nanostarch / SiO 2 2.0% of the theoretical output of the composite particles was added to sodium dodecylsulfonate; under the condition of heating in a water bath at 80°C, the dropping rate was controlled to be 80 drops / min, and added dropwise to the starch hydrolyzate with constant stirring. Adjust the pH value to 5.5 with HCl or NaOH, and age for 2 hours to ...

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Abstract

The invention relates to an in-situ polymerization method of nano starch / SiO2 composite particles, which comprises the following steps of: heating starch so as to prepare starch hydrolysate, and carrying out in-situ polymerization on the starch hydrolysate by using an industrial sodium silicate aqueous solution into which a coupling agent and a surface active agent are added, so that a nano starch / SiO2 composite particle emulsion is prepared; and carrying out centrifugalization on the nano starch / SiO2 composite particle emulsion for removing liquid supernatant, and sequentially carrying out washing, centrifugalization, drying and grinding on the obtained product so as to obtain nano starch / SiO2 composite particles. The method disclosed by the invention is simple in preparation, rich in raw material resources and low in price. Through adopting an in-situ hybridized polymerization principle and combining with a process of the in-situ polymerization of starch hydrolysate and SiO2, the prepared nano starch / SiO2 composite particles can be widely used as a surface coating for paper making and textile manufacturing, an adsorbent for water treatment, and a filler for rubber and plastics, therefore, the prepared nano starch / SiO2 composite particles have better market application prospects.

Description

technical field [0001] The invention relates to an inorganic-organic composite material, in particular to a nano-starch / SiO 2 A method for in-situ polymerization of composite particles belongs to the field of composite materials. Background technique [0002] Starch is a high polymer of glucose, which can be extracted from starch-containing substances such as corn, wheat, sweet potato, cassava and kudzu root. It has the characteristics of abundant resources, low price, light weight and no pollution. It is widely used in papermaking, textile industry industry, food processing industry, water treatment, rubber and plastic fillers, adhesive production and other fields. With the improvement of the country's awareness of environmental protection, modified starch (native starch has been properly chemically treated) has been widely used in the plastics and rubber industries. Due to the good performance of the rubber compound reinforced by modified starch, various Degradable plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08K3/36C08B30/12C01B33/113
Inventor 赵同建林华符新汪志芬张可喜王江
Owner HAINAN UNIVERSITY
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