Vegetable gum based on modified starch, preparation method thereof and application of vegetable gum

A plant glue and starch technology, applied in the field of modified starch plant glue and its preparation, can solve the problems of unsatisfactory mechanical and processing properties, complex production process, high cost of raw materials, etc., and achieve good plasticity, uniform particle size and low cost Effect

Inactive Publication Date: 2016-12-07
安顺济世科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Developed countries have invested a lot of manpower and material resources in the research and development of degradable plastics, such as Metabolix in the United States, Kaneka in Japan, PHB Industrial in Brazil, etc. Currently, there are certain problems in the research and development of degradable plastics that limit their application. , such as high cost of raw materials, unsatisfactory mechanical and processing properties, too complicated production process, too long degradation time, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The above-mentioned preparation method of vegetable gum based on modified starch is prepared according to the following steps: Weigh the raw materials in proportion, add them to a high-speed mixer for mixing, heat up to 20-120°C and react for 10-200min, then pass through single-screw or double-screw The screw kneading extruder is extruded and then cut to obtain starch vegetable glue, which is then processed into granules, sheets or films.

[0027] For the above-mentioned method for preparing vegetable gum based on modified starch, the temperature of a single-screw extruder with a diameter of 65mm is 80-100°C, 100-110°C, 110-120°C, 120-130°C, and the screw speed is 20 ~30r / min, the pellets do not stick together.

[0028] In the above method for preparing vegetable gum based on modified starch, the temperature of the twin-screw extruder with a diameter of 51-150mm is 60-90°C, 90-110°C, 110-130°C, 130-150°C, and the screw speed It is 15~20r / min, and the pellets do not sti...

Embodiment 1

[0032] 100 parts of potato starch, 10 parts of gum arabic, 10 parts of chitosan, 40 parts of polylactic acid, 40 parts of hydroxypropyl carboxymethyl cellulose, 80 parts of deionized water and 5 parts of cross-linking agent are added into a high-speed mixer and mixed as raw materials. Heat up to 80°C and react for 50 minutes, then pass through a single-screw extruder with a diameter of 65mm, the temperature is 80°C, 100°C, 110°C, 125°C, and the speed is 30r / min to extrude to obtain starch vegetable glue, and then processed into a film Test its mechanical properties. After the cut starch film was balanced at the relative humidity of the test room for 48 hours, the S-566 desktop electronic universal material testing machine was used to measure its tensile strength and elongation at break. Four samples were measured for each film, the clamping distance of the testing machine was set at 25 mm, and the stretching speed was set at 1 mm / s. The tensile strength of the film was 4.35MP...

Embodiment 2

[0034] 100 parts of tapioca starch, 15 parts of carrageenan, 10 parts of chitosan, 2 parts of potassium chloride, 50 parts of polyvinyl alcohol, 40 parts of hydroxypropyl cellulose, 100 parts of deionized water and 6 parts of crosslinking agent are used as raw materials Add a high-speed mixer and mix, heat up to 70°C and react for 35 minutes, then pass through a twin-screw extruder with a diameter of 85mm, the temperature is 70°C, 90°C, 110°C, 130°C, and the screw speed is 20r / min to extrude to obtain starch plants Glue, and then processed into a film to test its mechanical properties. After the cut starch film was balanced at the relative humidity of the test room for 48 hours, the S-566 desktop electronic universal material testing machine was used to measure its tensile strength and elongation at break. Four samples were measured for each film, the clamping distance of the testing machine was set at 25 mm, and the stretching speed was set at 1 mm / s. The tensile strength of...

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Abstract

The invention discloses vegetable gum based on modified starch. The vegetable gum is prepared from the following raw materials in parts by weight, 40-90 parts of modified starch, 3-30 parts of gelatinizing agents, 2-20 parts of plasticizers, 2-20 parts of polymer, 2-20 parts of plant fibers, 10-50 parts of deionized water and 1-15 parts of cross-linking agents. The raw materials are mixed and subjected to reaction at the temperature ranging from 20 DEG C to 120 DEG C for 10-200 minutes, and the vegetable gum is prepared by kneading, extruding and cutting procedures. The starch and the polymer or macro-molecules are compounded and mixed or grafted and copolymerized, the vegetable gum overcomes the shortcomings of poor plasticity, low tensile strength and frangibility of original starch and difficulty in degradation and non-renewable performance of the macro-molecules, the vegetable gum is degradable, renewable, low in cost, good in plasticity, stable on heat and resistant to aging, and a preparation method of the vegetable gum controls extrusion temperature, screw rotation speed, cutter rotation speed and granule cooling, so that granules cannot be adhered and are uniform in size and good in plasticity. The vegetable gum is applied to related products such as degradable plastics, capsules and food and drug packing materials.

Description

technical field [0001] The invention relates to a modified starch vegetable gum and a preparation method thereof. The vegetable gum can be used in the technical field of food and medicine packaging material packaging industry. Background technique [0002] Starch is an important basic industry and food industry raw material, which is composed of glucose molecules, and it is the most common storage form of carbohydrates. Natural starches are divided into two types: amylose and amylopectin. Amylose contains hundreds of glucose units, accounting for 20%-26% of natural starch, and has an unbranched helical structure with solubility; amylopectin contains thousands of glucose units, has a highly branched structure, and has poor solubility . Starch can be produced from soybeans, wheat, corn, cassava, potatoes, sweet potatoes, rice and other crops. Therefore, starch has a series of advantages such as cheap, easy to obtain, renewable, biodegradable, and less pollution. It is in lin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/04C08L67/04C08L1/28C08L5/08C08L5/00C08L29/04C08L69/00C08K3/16C08K5/053B29B9/06B29C47/92B29C48/92
CPCC08L3/04B29B9/06B29C48/92B29C2948/9258B29C2948/92704C08L2201/06C08L2201/08C08L67/04C08L1/286C08L5/08C08L5/00C08L29/04C08L1/284C08K3/16C08K5/053C08L69/00
Inventor 杨元勇周顺杨琼敏冯伟张林李春
Owner 安顺济世科技有限公司
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