Modified starch preparation method

A starch and modification technology, applied in the field of preparation of modified starch, can solve the problems of rough surface of products, low physical strength of products, poor dispersibility, etc.

Active Publication Date: 2009-06-03
广西康比特生物降解科技有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they are all products made by controlling the fineness of starch granules between 80 and 200 meshes, and blending and extruding modified starch and polymers, which show the following disadvantages: the products have poor water resistance; the surface of the products is rough; The physical strength of the product is low, which is more prominent when the amount of modified starch is large; the compatibility between modified starch and polymer is low, and the dispersion is poor, which limits its development and application

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A kind of preparation method of modified starch, described method is,

[0026] a, calcium carbonate with a particle size of nano-scale is used as an inorganic powder, and it is added to a high-speed mixer together with a silane coupling agent and stirred and mixed under heating conditions. The ratio is 97% of calcium carbonate, silane coupling agent Mixing agent 3%, mixed for 15 minutes at 100°C, then taken out and cooled to obtain mixed powder;

[0027] b. After drying the potato starch, grind the superfine powder until the particle size exceeds 300 mesh sieve; mix the mixed powder obtained in step a with the ground starch, methacrylic acid, polyol, styrene / ethylene / propylene / Styrene copolymer, dilauroyl peroxide, and silane coupling agent are mixed according to the proportion, and the proportion is calculated by weight percentage: starch 89.8%, methacrylic acid 0.5%, polyol 3%, styrene / ethylene / Propylene / styrene copolymer 3%, dilauroyl peroxide 0.5%, silane coupli...

Embodiment 2

[0030] A kind of preparation method of modified starch, described method is,

[0031] a. Titanium dioxide with a particle size of nano-scale is used as an inorganic powder, and it is added to a high-speed mixer together with a titanate coupling agent and stirred and mixed under heating conditions. The ratio is: 98% titanium dioxide, titanic acid 2% ester coupling agent, mix at 90°C for 20 minutes, then take out and cool to obtain mixed powder;

[0032] b. After drying the tapioca starch, grind the superfine powder until the particle size exceeds 400 mesh sieve; mix the mixed powder obtained in step a with the ground starch, dodecenylsuccinic anhydride, and dibutyl phthalate , ethylene-methacrylate copolymer, bis-2-phenoxyethyl peroxydicarbonate, and titanate coupling agent are mixed according to the proportion, and the proportion is calculated by weight percentage: starch 65%, dodecene 3% succinic anhydride, 8% dibutyl phthalate, 8% ethylene-methacrylate copolymer, 3% bis-2-p...

Embodiment 3

[0035] A kind of preparation method of modified starch, described method is,

[0036] a, the nano-sized montmorillonite is used as an inorganic powder, and is added to a high-speed mixer together with a silane coupling agent and a titanate coupling agent, and stirred and mixed under heating conditions, and the proportion is as follows: , 99% of montmorillonite, 0.5% of silane coupling agent, and 0.5% of titanate coupling agent were mixed at 80°C for 20 minutes, then taken out and cooled to obtain a mixed powder;

[0037] b, after drying the wheat starch, grind the superfine powder until the particle size exceeds 600 mesh sieve; combine the mixed powder obtained in step a with the ground starch, maleic anhydride acrylic acid copolymer, glycerin, sorbitol, lactic acid, and Oxidized bis(2-ethyl)hexyl dicarbonate and silane coupling agent are mixed according to the proportion, and the proportion is calculated by weight percentage, starch 66.5%, maleic anhydride acrylic acid copoly...

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

PropertyMeasurementUnit
oxidation stateaaaaaaaaaa
elongation at breakaaaaaaaaaa
Login to view more

Abstract

The invention discloses a making method of modified starch, which comprises the following steps: blending inorganic powder and coupler after heating and stirring; stirring the composite powder and ultrafine grinded starch, grafter, plasticizer, flexibilizer, initiator and coupler according to proportion; grinding; graining in the double-screw rod pelletizer; increasing the surface area of unit starch and viscosity.

Description

technical field [0001] The invention provides a preparation method of modified starch. Background technique [0002] It is a known technology to carry out blending and grafting modification on native starch to make it plastic. According to the contents disclosed in literature reports and patent documents, some of them add modified starch to degradable polyolefins to make disposable tableware and film products, and some add it to degradable polymers, such as adding to polyolefins. Among lactic acid (PLA), polyvinyl alcohol (PVA), and carbon dioxide polymer (PPC); some use all-natural starch, which is degradable after being treated with plasticizers and modifiers and mixed with a small amount of organic or inorganic substances. Packaging products. However, they are all products made by controlling the fineness of starch granules between 80 and 200 meshes, and blending and extruding modified starch and polymers, which show the following disadvantages: the products have poor w...

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
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08F251/00C08B31/00
Inventor 刘忠良王作晨刘艺
Owner 广西康比特生物降解科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap