Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Controllable biodegradable material preparation method

A biodegradable material and starch raw material technology, applied in the field of biodegradable material preparation with controllable degradation rate, can solve the problems that the strength of the composition cannot fully meet the requirements of use, the difficulty of uniform miscibility, and the high energy consumption of the distillation process, etc., to achieve convenience Degradation rate and material mechanical properties, regulation of degradation rate and material mechanical properties, effect of strong penetrating power

Active Publication Date: 2016-05-25
赵永富
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the amount of starch added in this method reaches 65-75% starch, the biodegradability is also high, but the use of more chemical reagents makes it difficult to mix evenly, and the distillation process consumes a lot of energy.
CN1916062A (2007) discloses a biodegradable starch-containing resin composition and product and preparation method, which contains starch, polyol, ethylene-methyl acrylate copolymer, salt additives and polyolefin resin, Although the starch content in the resin is relatively high, the strength of the composition still cannot fully meet the requirements of use
However, none of the above techniques

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
  • Controllable biodegradable material preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Take 100g of cornstarch, pass through a 40-mesh sieve after drying, the irradiation dose is 3kGy, and the product dosage unevenness is U=1.3; Fatty acid 5g, polylactic acid 30g, sensitizer and accelerator each 1g, fully stirred, and mixed evenly; then the above mixed sample was placed in an aluminum foil bag, vacuum-packed and then irradiated, the dose was 5kGy, and the product dose was not uniform The degree U=1.3; the irradiated miscible material is extruded and granulated to make a special material for full biodegradation. The material is made into a plastic film, and then irradiated with 10kGy, and covered with a film in a vegetable greenhouse, and it will be completely degraded within 170 days.

Embodiment 2

[0028] Take 100g of cassava starch, pass through a 40-mesh sieve after drying, the irradiation dose is 8kGy, and the product dosage unevenness is U=1.25; Fatty acid 8g, polylactic acid 40g, sensitizer and accelerator each 2g, fully stirred, and mixed evenly; then the above mixed sample was placed in an aluminum foil bag, packed with nitrogen and then irradiated, with a dose of 10kGy. Uniformity U=1.2; the irradiated miscible material is extruded and granulated to make a special material for full biodegradation. The material is made into a mulch, and then irradiated with 40kGy, and the film is cultivated in the open air, and it will be completely degraded in 160 days.

Embodiment 3

[0030] Take 100g of sweet potato starch, pass through a 40-mesh sieve after drying, irradiate 10kGy, and the product dosage unevenness is U=1.3; then add 5g of nano-silica (or zinc dioxide) with a particle size of 50nm, 35g of polyvinyl alcohol, Polylactic acid 10g, polylactic acid 60g, sensitizer and accelerator each 5g, fully stirred, and mixed evenly; then the above-mentioned mixed sample was placed in an aluminum foil bag, vacuum-packed and then irradiated, the dose was 15kGy, and the product dose unevenness U=1.2; The irradiated miscible material is extruded and granulated to make a special material for full biodegradation. The material is made into a mulch, and then irradiated with 100kGy, and then covered with a film in the vegetable greenhouse, and it will be completely degraded within 140 days.

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method for a controllable biodegradable material. The preparation method is characterized by comprising the following steps of: 1) starch radiation modification; 2) mixing: adding a nanometre assistant, polyvinyl alcohol, stearic acid, polylactic acid, a radiation sensitizer and an accelerant in the treated modified starch, adequately stirring, and uniformly mixing; 3) radiation copolymerization: placing the mixed sample in an aluminium foil bag carrying out packaging and sealing treatment in a vacuum or by charging nitrogen, and then carrying out radiation treatment on the packaged sample; 4) granulation / membrane preparation: uniformly pouring the mixture subjected to radiation copolymerization in a double-screw double-exhaust extrusion granulator group or a double-screw double-exhaust extrusion pelletizer group, and carrying out extrusion granulation or pelletizing; 5) radiation degradation rate control: radiating the product obtained by granulation / membrane preparation while controlling the dosage to be 10-100 kGy and controlling the dosage non-uniformity U of the product to be not greater than 1.3. According to the preparation method disclosed by the invention, the problems of cumbersome process, high-temperature energy consumption, and inevitably-brought pollutant discharge of a common chemical method are overcome, and the object of controlling the decomposition rate is realized.

Description

technical field [0001] The invention relates to a production process of a biodegradable material, in particular to a method for preparing a biodegradable material with controllable degradation speed based on radiation and nanotechnology. Background technique [0002] The rapid development of petrochemical industry has provided people with excellent performance and cheap plastic products for daily life. However, the waste after plastic use is thrown into fields, rivers, mountains, streets and parks at will, causing "white pollution" and seriously affecting the human living environment. For this reason, countries have legislated to restrict the use of films and foamed plastics, and at the same time vigorously develop biodegradable plastic products. [0003] Starch has a wide range of sources and is cheap. It is a renewable biological resource that can be completely digested and utilized by microorganisms. Therefore, the development of starch-based biodegradable plastics has b...

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): C08J7/12C08J3/28C08L3/02C08L67/04C08L29/04C08K3/36C08K3/22
Inventor 刘和文
Owner 赵永富
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com