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Method for preparing starch alkyl glycoside surfactant

A technology of surfactant and starch alkyl glycoside, which is applied in the field of surfactant preparation, can solve the problems of starch with large molecular weight, easy molecular entanglement, and low surface activity, and achieve simple preparation process, improved enzymatic hydrolysis degree, and no three wastes The effect of emissions

Inactive Publication Date: 2010-06-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main reason for the low surface activity of starch alkyl glycoside surfactants is that the molecular weight of starch is large, the molecules are easily entangled, and it is difficult to adsorb on the interface (surface) surface.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh 50 g of tapioca starch ball-milled for 1 hour, prepare 30wt% starch emulsion with distilled water, adjust pH=6.5 with 2wt% HCl solution, add high-temperature amylase at T=95°C, the consumption is 200u / g (dry starch), inactivated at 105°C after enzymatic hydrolysis for 1 hour; cool the starch emulsion after deenzyme to room temperature, adjust pH=8.5 with 4wt% NaOH solution, stir evenly, add 20wt% absolute dry starch hydrogen peroxide and 0.2wt % magnesium sulfate solution (0.2%), reacted 6 hours at 50 ℃; React with an appropriate amount of 10wt% Na 2 SO 3 Neutralize excess oxidant in the solution; adjust the pH of the solution to 8.5 with 4wt% NaOH solution, add the dodecenyl succinic anhydride dilution that accounts for 8wt% of dry starch, and react at 35°C for 4 hours, and the neutralization pH= 7. The final product has a viscosity of 11.8mPa·s and a surface tension of 29.683mN / m at a concentration of 7wt%. Foaming property: the initial foam height is 8mm, an...

Embodiment 2

[0043]Take by weighing 50g of tapioca starch ball-milled for 2 hours, prepare 30wt% starch emulsion with distilled water, adjust pH=6.5 with 2wt% HCl solution, add high-temperature amylase at T=95°C, consumption is 200u / g (dry starch), inactivated at 105°C after enzymatic hydrolysis for 1 hour; cool the starch emulsion after deenzyme to room temperature, adjust the pH=8.5 with 4wt% NaOH solution, stir evenly, add 20wt% hydrogen peroxide and 0.2wt% dry starch % magnesium sulfate solution (0.2%), reacted 6 hours at 50 ℃; React with an appropriate amount of 10wt% Na 2 SO 3 Neutralize the excess oxidant in the solution; use 4wt% NaOH solution to adjust the pH of the solution to 8.5, add 6wt% dodecenyl succinic anhydride of absolute dry starch, react at 35° C. for 4 hours, and neutralize the pH to 7 at the end of the reaction. The final product has a viscosity of 26.8mPa·s and a surface tension of 28.229mN / m at a concentration of 7wt%. Foaming property: the initial foam height is...

Embodiment 3

[0045] Take by weighing 50g of tapioca starch ball-milled for 2 hours, prepare 30wt% starch emulsion with distilled water, adjust pH=6.5 with 2wt% HCl solution, add high-temperature amylase at T=95°C, consumption is 200u / g (dry starch), inactivated at 105°C after enzymatic hydrolysis for 1 hour; cool the starch emulsion after deenzyme to room temperature, adjust pH=8.5 with 4wt% NaOH solution, stir evenly, add 20wt% hydrogen peroxide and 0.2% dry starch Magnesium sulfate solution (0.2%), reacted at 50 ℃ for 6 hours, after the reaction finished, use an appropriate amount of 10wt%Na 2 SO 3 solution to neutralize excess oxidant. Use 4wt% NaOH solution to adjust the pH of the solution to 8.5, add 8wt% dry starch dodecenyl succinic anhydride, react at 35° C. for 4 hours, and neutralize the pH to 7 at the end of the reaction. The final product has a viscosity of 32.4mPa·s and a surface tension of 27.541mN / m at a concentration of 7wt%. Foaming property: the initial foam height is ...

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Abstract

The invention discloses a method for preparing starch alkyl glycoside surfactant. The method adopts the following steps of: (1) grinding the starch by a mechanical ball-milling method and performing enzymolysis treatment and oxidation modification on the starch to obtain oxidized starch; and (2) reacting the oxidized starch with one or more of dodecenyl succinic anhydride, octenyl succinic anhydride and cationic etherifying agent to obtain the starch alkyl glycoside surfactant. The starch alkyl coside surfactant prepared by the method of the invention has the advantages of good surface activity, proper viscosity, moderate foam or low foam, natural raw materials, reproducibility, no toxicity, little skin irritation, easy biological degradation, safe use, and the like, which has wide application prospect.

Description

technical field [0001] The invention relates to the field of preparation of surfactants, in particular to a method for preparing starch alkyl glycoside surfactants. Background technique [0002] Compared with traditional surfactants, starch alkyl glycoside surfactants have the characteristics of natural and renewable raw materials, non-toxic, less irritating to skin, and easy biodegradation. Starch alkyl glycoside surfactants can be used as thickeners, stabilizers, dispersants, emulsifiers, fillers, etc. and are widely used in food, petroleum, textile, paper, wastewater treatment and other industries. [0003] There are two main ways to prepare surfactants from native starch: direct utilization and conversion utilization. The direct utilization method is to use starch as a raw material and directly chemically modify it to produce starch ester surfactants, carboxymethyl starch and amphoteric starch; the conversion utilization method is to hydrolyze starch into glucose first,...

Claims

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Application Information

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IPC IPC(8): B01F17/56C12P19/44C09K23/56
Inventor 张宏伟孙丹丹陈港
Owner SOUTH CHINA UNIV OF TECH
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