Synthesis method of starch-based N-butyl glucose lauramide used as surfactant
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A technology of surfactant and synthesis method, applied in the fields of polymer chemistry, surface science and biochemistry, can solve the problems of high irritation of surfactant and unsatisfactory biodegradability, and achieve low surface tension and excellent foaming performance. , the effect of simple process
Inactive Publication Date: 2010-07-28
GUILIN UNIVERSITY OF TECHNOLOGY
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[0006] The purpose of the present invention is to provide a synthesis process of starch-based surfactant N-butylglucose lauramide under normal temperature and pressure, so as to solve the problems of some traditional surfactants such as greater irritation and unsatisfactory biodegradability
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[0022] The pH value of the starch milk with a mass fraction of 30% is adjusted to 6.0 with a 10% sodium hydroxide solution, and then calcium chloride is added to make the calcium ion mass fraction reach 1%. Then add α-amylase at the rate of 6 units / g starch, stir well, heat to 85°C, continue stirring for 30min, and then test the end point of liquefaction with iodine solution. After the liquefaction is complete, raise the temperature to 100°C to inactivate the enzyme for 10 minutes. After cooling, adjust the pH to about 4.5 with dilute hydrochloric acid with a mass fraction of 10%, then add glucoamylase into the flask at a rate of 100 units / g starch, heat up to 60°C under stirring, continue stirring for 15 minutes, and then stand for saccharification for 18 hours. Inactivate the enzyme at high temperature, and filter the saccharification solution after cooling. Add saccharification solution and n-butylamine according to the sugar amine molar ratio of 1.2, add water at the same...
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Abstract
The invention discloses a synthesis method of starch-based N-butyl glucose lauramide used as a surfactant, which comprises the following steps of: adding water to starch to prepare starch milk, regulating the pH value, adding calcium chloride and amylase, heating in a water bath to enable the starch to be subjected to liquefaction reaction, inactivating enzymes at high temperature after complete liquefaction, regulating the pH value, adding saccharifying enzymes, heating in the water bath, carrying out saccharification, inactivating enzymes at high temperature, cooling and filtering to obtain a hydrolyzed glucose solution; adding the hydrolyzed glucose solution and n-butylamine by the amino-sugar ratio, adding water, a color resisting agent and a polymer rhodium catalyst simultaneously, heating while stirring, controlling the pH value of the system, and carrying out amination to prepare N-butyl glucosamine; and adding aminate and lauric acid, adding aminoacylase simultaneously, heating while stirring, controlling the pH value of the system, and carrying out acidylation to prepare the N-butyl glucose lauramide. The invention has the advantages of simple process, low cost and high utilization ratio of raw materials and the product has low surface tension, excellent foaming performance, no toxicity and no stimulation and can be biologically degraded easily.
Description
technical field [0001] The invention relates to a method for synthesizing starch-based surfactant N-butylglucose lauramide, which belongs to the technical fields of polymer chemistry, surface science and biochemistry. Background technique [0002] As people pay more and more attention to the global ecological environment, the production and development of surfactants are increasingly turning their attention to environmental friendliness and renewable raw materials. Surfactants in the 21st century are moving towards safety and mildness. And the direction of easy biodegradation. "Green surfactants" or "environmentally friendly surfactants" have gradually become a research hotspot in the field of surfactants. The new type of surfactant developed from renewable resources such as starch and glucose belongs to the main category of the new generation of "green surfactant". new products required. [0003] Since there are multiple hydroxyl groups in the molecular structure of star...
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