CN103554281B - A kind of low viscosity cassava method for preparing composite modified starch - Google Patents
A kind of low viscosity cassava method for preparing composite modified starch Download PDFInfo
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- CN103554281B CN103554281B CN201310482402.5A CN201310482402A CN103554281B CN 103554281 B CN103554281 B CN 103554281B CN 201310482402 A CN201310482402 A CN 201310482402A CN 103554281 B CN103554281 B CN 103554281B
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- low viscosity
- modified starch
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Abstract
The present invention relates to a kind of tapioca (flour), particularly relate to a kind of low viscosity composite modified starch.Belong to the technical field of weaving.A kind of low viscosity cassava method for preparing composite modified starch, tapioca (flour) and esterifying agent are carried out esterification under the effect of catalyzer and obtains esterification starch, irradiation esterification starch can obtain low viscosity cassava composite modified starch.The starch of irradiation esterification, except viscosity degradation, other indexs are all unaffected.By controlling radiation parameter, the product of different viscosity can be obtained.The technology of the present invention has that technique is simple, less energy-consumption, few public hazards, easily automatization, many advantages such as safe and reliable.
Description
Technical field
The present invention relates to a kind of tapioca (flour), particularly relate to a kind of low viscosity composite modified starch.Belong to the technical field of weaving.
Background technology
China is the big producing country of native starch, has abundant tapioca (flour) resource.Esterification starch and carboxymethyl starch are for making paper coating binder or doing starching for weaving, there is fabulous effect, add the swelling and dispersed of native starch particles, reduce the effect of native starch flocking settling, improve transparency, further improve film forming properties.But esterification starch is the same with native starch with carboxymethyl starch viscosity, viscosity is very high, has been very thick when gelatinization concentration reaches 6%; As paper making and cloth coating tackiness agent and textile sizing agent, its working concentration generally will reach 10%, and even more than 30%, starch viscosity must be reduced and could use.The viscosity reducing starch generally adopts three kinds of methods and acidic treatment, oxidizing treatment, ferment treatment method, and these three kinds of methods belong to chemical treatment method, complex disposal process, and reference mark is many, also can introduce other impurity.Prove at production solid line, if first reduce native starch viscosity, after carry out esterification, esterifying efficiency can reduce greatly.If first carry out esterification viscosity reduction degree again, the esterified group connected can come off again, and the consumption of esterifying agent is increased greatly, causes production cost very high.
Summary of the invention
The present invention, in order to overcome the deficiencies in the prior art, provides a kind of low viscosity cassava method for preparing composite modified starch.
For solving above technical problem, the invention provides following technical scheme:
A kind of low viscosity cassava method for preparing composite modified starch, comprises the following steps:
(1) esterification: tapioca (flour) and esterifying agent react obtained esterification starch under catalyst action;
(2) irradiation esterification starch: the esterification starch obtained by x ray irradiation x can obtain low viscosity cassava composite modified starch.
Preferably: the esterifying agent of esterification is made up of acetic anhydride and Mono Chloro Acetic Acid, acetic anhydride and Mono Chloro Acetic Acid mol ratio are 1:1 ~ 3:1.
Preferably: the catalyzer of esterification is sodium hydroxide.
Preferably: tapioca (flour) and esterifying agent mol ratio are 1:2 ~ 1:3.
Preferably: esterification reaction temperature is 35 ~ 50 DEG C.
Preferably: adopt
60c
0gamma ray irradiation, irradiation dose is 9.0 ~ 18.5kGy, irradiation time is 30 ~ 60 minutes, and irradiation temperature is 25 ~ 32 DEG C.
By esterification, obtain acetate starch, sodium carboxymethyl starch, containing acetyl group and carboxymethyl group modified starch mixture.The stability of this mixture to acid, alkali, heat is higher, and emulsification, conformal, film forming and expansion effect are better.The high-energy ray irradiation of Y particle can not bring any impurity in the course of processing; Can be with package processing, C-C in esterification starch macromole can also be good for, C-O is strong, C-H is good for and interrupts, starch polymer is ruptured, and viscosity decreases.Due to energetic ray effect, starch molecule is more easily produced into the free radical of overactivity degree, while viscosity reduction, does not affect the esterified group be connected on starch molecule at all.The starch of irradiation esterification, except viscosity degradation, other indexs are all unaffected.By controlling radiation parameter, the product of different viscosity can be obtained.The technology of the present invention has that technique is simple, less energy-consumption, few public hazards, easily automatization, many advantages such as safe and reliable.
Embodiment
Below in conjunction with specific embodiment, elaboration detailed is further done to the present invention, but embodiments of the present invention are not limited to the scope that embodiment represents.These embodiments only for illustration of the present invention, but not for limiting the scope of the invention.In addition, after reading content of the present invention, those skilled in the art can do various amendment to the present invention, and these equivalent variations fall within appended claims limited range of the present invention equally.
Embodiment 1
Esterifying agent is formed by 1:1 mol ratio by acetic anhydride and Mono Chloro Acetic Acid; tapioca (flour) and esterifying agent are evenly mixed in bath temperature 35 DEG C by the mol ratio of 1:2; sodium hydroxide is react under the condition of catalyzer, obtains acetate starch, carboxymethyl starch and rolls into a ball starch mixture containing acetyl group and carboxymethyl.The modified starch obtained is passed through
60c
0gamma ray irradiation, irradiation dose be 9.0kGy, irradiation time is 30 minutes, irradiation temperature is irradiation under the condition of 25 DEG C, can obtain the cassava composite modified starch that viscosity is 60mpa.s (butt 10%, blookfieldRVT viscometer).
Embodiment 2
Esterifying agent is formed by 2:1 mol ratio by acetic anhydride and Mono Chloro Acetic Acid; tapioca (flour) and esterifying agent are evenly mixed in bath temperature 40 DEG C by the mol ratio of 1:2.5; sodium hydroxide is react under the condition of catalyzer, obtains acetate starch, carboxymethyl starch and rolls into a ball starch mixture containing acetyl group and carboxymethyl.The modified starch obtained is passed through
60c
0gamma ray irradiation, irradiation dose be 15.0kGy, irradiation time is 40 minutes, irradiation temperature is irradiation under the condition of 30 DEG C, can obtain the cassava composite modified starch that viscosity is 40mpa.s (butt 10%, blookfieldRVT viscometer).
Embodiment 3
Esterifying agent is formed by 3:1 mol ratio by acetic anhydride and Mono Chloro Acetic Acid; tapioca (flour) and esterifying agent are evenly mixed in bath temperature 50 DEG C by the mol ratio of 1:3; sodium hydroxide is react under the condition of catalyzer, obtains acetate starch, carboxymethyl starch and rolls into a ball starch mixture containing acetyl group and carboxymethyl.The modified starch obtained is passed through
60c
0gamma ray irradiation, irradiation dose be 18.5kGy, irradiation time is 60 minutes, irradiation temperature is irradiation under the condition of 32 DEG C, can obtain the cassava composite modified starch that viscosity is 20mpa.s (butt 10%, blookfieldRVT viscometer).
By esterification, obtain acetate starch, sodium carboxymethyl starch, containing acetyl group and carboxymethyl group modified starch mixture.The stability of this mixture to acid, alkali, heat is higher, and emulsification, conformal, film forming and expansion effect are better.The energetic ray of Y particle can C-C be strong in esterification starch macromole, C-O is strong, C-H is strong interrupts, and starch polymer is ruptured, and viscosity decreases.Due to energetic ray effect, starch molecule is more easily produced into the free radical of overactivity degree, while viscosity reduction, does not affect the esterified group be connected on starch molecule at all.The starch of irradiation esterification, except viscosity degradation, other indexs are all unaffected.By controlling radiation parameter, the product of different viscosity can be obtained.The technology of the present invention has that technique is simple, less energy-consumption, few public hazards, easily automatization, many advantages such as safe and reliable.
Claims (1)
1. a low viscosity cassava method for preparing composite modified starch, comprises the following steps:
(1) esterification: tapioca (flour) and esterifying agent are that 1:3-2 reacts obtained esterification starch under the effect of catalyzer sodium hydroxide in molar ratio;
(2) irradiation esterification starch: pass through
60c
othe esterification starch that gamma ray irradiation obtains can obtain low viscosity cassava composite modified starch;
Described esterifying agent by acetic anhydride and Mono Chloro Acetic Acid in molar ratio for 1-3:1 forms;
The temperature of described esterification is 35-50 DEG C;
Described
60c
othe dosage of gamma ray irradiation is 9.0-18.5kGy,
60c
othe time of gamma ray irradiation is 30-60min,
60c
othe temperature of gamma ray irradiation is 25-32 DEG C.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105440145B (en) * | 2015-12-17 | 2019-07-02 | 广西农垦明阳生化集团股份有限公司 | A kind of preparation method irradiating chemically composited converted starch |
| CN107048156A (en) * | 2017-03-09 | 2017-08-18 | 桂林三养胶麦生态食疗产业有限责任公司 | A kind of wet Guilin rice-flour noodle of instant fresh and its preparation technology |
| CN107048179A (en) * | 2017-03-09 | 2017-08-18 | 桂林三养胶麦生态食疗产业有限责任公司 | A kind of wet oat flour of instant fresh and its preparation technology |
| CN107048345A (en) * | 2017-03-09 | 2017-08-18 | 桂林三养胶麦生态食疗产业有限责任公司 | A kind of wet sweet potato powder of instant fresh and its preparation technology |
| CN107048178A (en) * | 2017-03-09 | 2017-08-18 | 桂林三养胶麦生态食疗产业有限责任公司 | A kind of wet highland barley powder of instant fresh and its preparation technology |
| CN107048157A (en) * | 2017-03-09 | 2017-08-18 | 桂林三养胶麦生态食疗产业有限责任公司 | A kind of wet oat ground rice of instant fresh and its preparation technology |
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| CN1389474A (en) * | 2002-06-25 | 2003-01-08 | 湖北高能材料科技有限公司 | Starch-modifying method |
| CN101413193A (en) * | 2008-12-15 | 2009-04-22 | 徐建新 | Warp sizing technological process |
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| CN103014074A (en) * | 2013-01-05 | 2013-04-03 | 江苏徐淮地区徐州农业科学研究所 | Production method of high-concentration ethanol with sweet potatoes serving as raw materials |
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| JP4514089B2 (en) * | 2003-01-22 | 2010-07-28 | 関西ペイント株式会社 | Curable starch composition, modified starch, method for producing the same, and article thereof |
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| CN101413193A (en) * | 2008-12-15 | 2009-04-22 | 徐建新 | Warp sizing technological process |
| CN102942633A (en) * | 2012-12-11 | 2013-02-27 | 广西民族大学 | Clean production method of compound modified starch |
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Denomination of invention: A preparation method for low viscosity cassava composite modified starch Effective date of registration: 20230802 Granted publication date: 20160330 Pledgee: Nanning Branch of Guilin Bank Co.,Ltd. Pledgor: GUANGXI HONGHAO STARCH DEVELOPMENT Co.,Ltd. Registration number: Y2023450000098 |