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

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...

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.