Preparation method of irradiation and chemistry co-modified starch
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of compound modified starch and modified starch, which is applied in the field of modified starch, can solve the problems of gelatinization temperature lowering below 45°C, limited reduction of starch gelatinization temperature, singleness, etc., and achieve high reaction efficiency, good stability, and guaranteed viscosity and stability effects
Active Publication Date: 2016-03-30
广西农垦明阳生化有限公司
View PDF6 Cites 9 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
From the public literature, we can know that most of the current methods to reduce the gelatinization temperature of starch use a single chemical or physical treatment method, the reduction of starch gelatinization temperature is limited, and the use of wet denaturation can rarely reduce the gelatinization temperature to 45°C the following
And when the method of reducing starch molecular chains such as irradiation and acid hydrolysis lowers the gelatinization temperature of starch, due to the reduction and degradation of starch molecular weight, the viscosity and stability of starch are affected, and its performance is not good when used as a binder.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0026] use 60 co γ - Radiation treatment of cassava starch, wherein the irradiation dose is 2KGY, the irradiation time is 1h, and the irradiation temperature is 38°C.
[0027] Disperse 500g of irradiated tapioca starch in 650mL of water (containing 5g of sodium carbonate), add 20g of vinyl acetate while stirring at 38°C, keep at 38°C for 1 hour, neutralize the pH value to 6.0 with dilute hydrochloric acid, filter, Washing and drying to get the finished product.
Embodiment 2
[0029] use 60 co γ - Radiation treatment of cassava starch, wherein the irradiation dose is 4KGY, the irradiation time is 1.5h, and the irradiation temperature is 40°C.
[0030] Take 500g of irradiated tapioca starch and disperse it in 550mL of water, add 10g of sodium hydroxide and sodium carbonate mixture as a catalyst, add 10g of vinyl acetate while stirring at 40°C, keep the reaction at 40°C for 1 hour, and neutralize the pH value with dilute sulfuric acid To 6.5, filter, wash, and dry to get the finished product.
Embodiment 3
[0032] use 60 co γ - Radiation treatment of cassava starch, wherein the irradiation dose is 2.2KGY, the irradiation time is 2.5h, and the irradiation temperature is 45°C.
[0033] Take 500g of irradiated tapioca starch and disperse it in 750mL of water (containing 25g of potassium hydroxide and sodium carbonate mixture), add 75g of vinyl acetate while stirring at 40°C, keep it at 40°C for 1.5h, and neutralize the pH value with dilute hydrochloric acid To 6.7, filter, wash, and dry to get the finished product.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Login to view more
Abstract
The invention relates to a preparation method of an irradiation and chemistry co-modified starch. The preparation method comprises the following steps: irradiating starch by 60 Co gamma rays, and then subjecting the irradiation modified starch to a chemical esterification treatment so as to obtain the irradiation and chemistry co-modified starch. The obtained starch has the characteristics of low gelatinization temperature and strong bonding force, the stability of paste liquid (6%) is good, the viscosity of paste liquid barely changes, the starch is suitable for being used as an adhesive for spraying between layers during the production process of paper and paperboard, the starch has a good bonding force at a low drying temperature, and the drying cost is reduced. At the same time, due to the low primary gelatinization temperature, the peeling strength between the starch and paper or paper machine is reduced, and the phenomenon that the starch is adhered on the cylinder is reduced.
Description
technical field [0001] The invention belongs to the technical field of modified starch, and in particular relates to a preparation method of irradiation chemical compound modified starch. Background technique [0002] Modified starch adhesive is to improve the performance of starch and expand its application range, using physical, chemical or enzymatic treatment to introduce new functional groups on starch molecules or change the size of starch molecules and the properties of starch granules, thereby changing the gelatinization of starch Characteristics such as temperature, hot viscosity and its stability make it more suitable for the requirements of paper and board adhesive applications. Modified starch adhesive has the advantages of high bonding strength, high cardboard stiffness, no moisture absorption and softening, no corrosion, no pollution, and low cost of use. It is being adopted by more and more carton manufacturers. However, the initial gelatinization temperature ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more 
Login to view more