CN102627698B - Preparation method of sweet potato carboxymethyl modified starch - Google Patents
Preparation method of sweet potato carboxymethyl modified starch Download PDFInfo
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- CN102627698B CN102627698B CN 201210081598 CN201210081598A CN102627698B CN 102627698 B CN102627698 B CN 102627698B CN 201210081598 CN201210081598 CN 201210081598 CN 201210081598 A CN201210081598 A CN 201210081598A CN 102627698 B CN102627698 B CN 102627698B
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Abstract
A preparation method of a sweet potato carboxymethyl modified starch. The method comprises steps of: adding NaOH into sweet potato starch; dissolving by an ethanol solution; stirring thoroughly, and then carting out microwave treatment to alkalify the starch; adding chloroacetic acid and carrying out microwave treatment; treating the starch by high voltage pulse electric field for etherification; cooling the solution to room temperature; regulating a pH value; filtering; rinsing the filter residue by alcohol solution and carrying out vacuum drying till a constant weight. The method of the invention employs microwave treatment to replace traditional water bath heating in sweet potato starch alkalization and etherification processes, so as to greatly improves production efficiency and saves the cost; meanwhile, high voltage pulsed electric field (PEF) is utilized in the sweet potato starch etherification process to effectively improve the degree of substitution (DS) of carboxymethyl starch to 0.94. The method is simple and convenient, has high in degree of substitution, and provides new way for deep processing and utilization of sweet potato starch.
Description
Technical field:
The present invention relates to a kind of preparation method of Ipomoea batatas carboxymethyl modified starch.
Background technology:
Sweet potato starch is natural reproducible resource, and China is sweet potato starch big producing country, and it is cheap, is easy to gelatinization, and chemical reactivity is high, suitable preparation treated starch.The carboxymethylation of starch is that starch is carried out the process that etherificate makes starch conversion, carboxymethyl starch after the modification (CMS) has the intrinsic character of carboxyl, as: the throwing out of sequestering action, ion-exchange, polyanion and acid function, also have simultaneously some solution properties, as: thickening, gelatinization, moisture absorption, adhesivity and film-forming properties, can be widely used in the fields such as medicine, food, weaving, printing and dyeing, papermaking, petroleum drilling, be a kind of modified starch product that has market outlook.
To the history in existing more than 70 year of research of carboxymethyl starch, but also being in the carboxymethyl modified research of starting stage, especially sweet potato starch, the research of the carboxymethyl-modification of China's starch reports seldom in the world.
Summary of the invention:
Technical problem to be solved by this invention is: for problems such as heat-up time are long in the sweet potato starch modifying process in the prior art, efficient is low, substitution value is not high, provide a kind of preparation method of Ipomoea batatas carboxymethyl modified starch.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of preparation method of Ipomoea batatas carboxymethyl modified starch, the method is the ratio that adds 690-710gNaOH in the 1kg sweet potato starch, after in sweet potato starch, adding NaOH, dissolve with ethanol solution with the 75-80% mass concentration, the add-on of ethanolic soln is that every 1kg sweet potato starch adds the 10L ethanolic soln, microwave treatment 20-30min after fully stirring, so that the starch alkalization adds the chloroacetic ratio of 590-610g in the 1kg sweet potato starch again and adds Mono Chloro Acetic Acid, behind the microwave treatment 60-70min, process 5-6s with pulsed electric field, make the starch etherificate, after solution was cooled to room temperature, adjust pH was 6.5-7.0, again with 100 purpose filter-cloth filterings, filter residue is clean with the ethanolic soln rinsing of 80-85% mass concentration, in 75-78 ℃ of vacuum-drying to constant weight, get final product.
Above-mentioned sweet potato starch is that market is bought.Adjust pH is the routine techniques means in the aforesaid method, because solution is alkalescence before the adjust pH, therefore, available quality concentration is that glacial acetic acid solution, malic acid solution or the citric acid solution etc. of 30-45% neutralize in present method.
The power of described twice microwave treatment is all 300-350W.
The strength of electric field that described pulsed electric field is processed is 20-25KV/cm
2, frequency is 8000Hz, umber of pulse is 10-12.
Method of the present invention, in sweet potato starch alkalization and etherification procedure, adopt microwave treatment to replace traditional heating in water bath, improved significantly production efficiency, saved cost, in the sweet potato starch etherification procedure, adopt simultaneously pulsed electric field (PEF) to process, Effective Raise carboxymethyl starch substitution value (DS), DS can be increased to 0.94.
The preparation method of the Ipomoea batatas carboxymethyl modified starch that relates among the present invention has simple and easy to do, product substitution value high, and the deep processing utilization that can be sweet potato starch provides new approach.
Embodiment:
Embodiment 1
After in the 100kg sweet potato starch, adding 70kg NaOH, dissolve with ethanol solution with 1000L 78% mass concentration, microwave treatment 25min (microwave power is 320W) after fully stirring, so that starch alkalization, add again the 60kg Mono Chloro Acetic Acid, microwave treatment 65min (microwave power is 320W), (strength of electric field is 22KV/cm to insert the high-voltage pulse electric field device again
2, frequency is 8000Hz, umber of pulse is 10-12) the middle 5s that processes, make the starch etherificate, after solution is cooled to room temperature, with in the glacial acetic acid solution of 40% mass concentration and adjust pH be 6.8, use again 100 purpose filter-cloth filterings, filter residue is clean with the ethanolic soln rinsing of 82% mass concentration, place 76 ℃ vacuum drying oven to be dried to constant weight, get final product.
Embodiment 2
After in the 100kg sweet potato starch, adding 71kg NaOH, dissolve with ethanol solution with 1000L 80% mass concentration, microwave treatment 30min (microwave power is 300W) after fully stirring, so that starch alkalization, add again the 61kg Mono Chloro Acetic Acid, microwave treatment 70min (microwave power is 300W), (strength of electric field is 25KV/cm to insert the high-voltage pulse electric field device again
2, frequency is 8000Hz, umber of pulse is 10-12) the middle 6s that processes, make the starch etherificate, after solution is cooled to room temperature, with in the citric acid solution of 45% mass concentration and adjust pH be 7.0, use again 100 purpose filter-cloth filterings, filter residue is clean with the ethanolic soln rinsing of 85% mass concentration, place 78 ℃ vacuum drying oven to be dried to constant weight, get final product.
Embodiment 3
After in the 100kg sweet potato starch, adding 69kg NaOH, dissolve with ethanol solution with 1000L 75% mass concentration, microwave treatment 20min (microwave power is 350W) after fully stirring, so that starch alkalization, add again the 59kg Mono Chloro Acetic Acid, microwave treatment 60min (microwave power is 350W), (strength of electric field is 20KV/cm to insert the high-voltage pulse electric field device again
2, frequency is 8000Hz, umber of pulse is 10-12) the middle 5s that processes, make the starch etherificate, after solution is cooled to room temperature, with in the malic acid solution of 30% mass concentration and adjust pH be 6.5, use again 100 purpose filter-cloth filterings, filter residue is clean with the ethanolic soln rinsing of 80% mass concentration, place 75 ℃ vacuum drying oven to be dried to constant weight, get final product.
Claims (1)
1. the preparation method of an Ipomoea batatas carboxymethyl modified starch, it is characterized in that: the method is the ratio that adds 690-710gNaOH in the 1kg sweet potato starch, after in sweet potato starch, adding NaOH, dissolve with ethanol solution with the 75-80% mass concentration, the add-on of ethanolic soln is that every 1kg sweet potato starch adds the 10L ethanolic soln, microwave treatment 20-30min after fully stirring, add the chloroacetic ratio of 590-610g in the 1kg sweet potato starch again and add Mono Chloro Acetic Acid, behind the microwave treatment 60-70min, process 5-6s with pulsed electric field, after solution is cooled to room temperature, adjust pH is 6.5-7.0, and is with 100 purpose filter-cloth filterings, that filter residue is clean with the ethanolic soln rinsing of 80-85% mass concentration, in 75-78 ℃ of vacuum-drying to constant weight, get final product;
The power of above-mentioned twice microwave treatment is all 300-350W;
The strength of electric field that above-mentioned pulsed electric field is processed is 20-25KV/cm
2, frequency is 8000Hz, umber of pulse is 10-12.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105566506B (en) * | 2016-03-13 | 2018-07-27 | 广西锦翰环保科技有限公司 | A kind of production method of modified tapioca starch |
| CN106699907A (en) * | 2016-11-19 | 2017-05-24 | 王丽 | Processing method of refined taro starch |
| CN107573426A (en) * | 2017-09-25 | 2018-01-12 | 山东神州翔宇科技集团有限公司 | A kind of preparation method of sweet potato carboxymethyl modified starch |
| CN108822225A (en) * | 2018-06-20 | 2018-11-16 | 山东神州翔宇科技集团有限公司 | A kind of preparation method of sweet potato carboxymethyl modified starch |
| CN111303305A (en) * | 2020-03-23 | 2020-06-19 | 华南理工大学 | Method for preparing high-substitution-degree acetylated starch by electric field coupling ultrasound |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0166491A2 (en) * | 1984-06-27 | 1986-01-02 | Graanderivaten Raffinaderijen Amylum, en abrégé "G.R. Amylum", auparavant Glucoseries réunies | Process for preparing carboxymethyl starch and detergent composition containing this carboxymethyl starch |
| CN101624424A (en) * | 2009-08-03 | 2010-01-13 | 甘肃圣大方舟马铃薯变性淀粉有限公司 | Method for preparing carboxymethyl modified starch |
| CN101830994A (en) * | 2010-05-25 | 2010-09-15 | 西南大学 | Preparation method of potato carboxymethyl starch |
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| DE10033197C1 (en) * | 2000-07-07 | 2002-01-10 | Fraunhofer Ges Forschung | Process for the preparation of highly substituted carboxymethyl starch |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0166491A2 (en) * | 1984-06-27 | 1986-01-02 | Graanderivaten Raffinaderijen Amylum, en abrégé "G.R. Amylum", auparavant Glucoseries réunies | Process for preparing carboxymethyl starch and detergent composition containing this carboxymethyl starch |
| CN101624424A (en) * | 2009-08-03 | 2010-01-13 | 甘肃圣大方舟马铃薯变性淀粉有限公司 | Method for preparing carboxymethyl modified starch |
| CN101830994A (en) * | 2010-05-25 | 2010-09-15 | 西南大学 | Preparation method of potato carboxymethyl starch |
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