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

Biodegradable agricultural mulching film and preparation method thereof

An agricultural mulch film and biodegradable technology, applied in the field of film materials, can solve problems such as low mechanical strength, poor moisturizing performance, and development obstacles, and achieve the effect of improving mechanical strength and moisturizing performance

Active Publication Date: 2016-04-13
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
View PDF5 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing biodegradable mulch materials have the problems of low mechanical strength and poor moisture retention performance, which hinders their development in the field of agricultural mulch films.

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
  • Biodegradable agricultural mulching film and preparation method thereof
  • Biodegradable agricultural mulching film and preparation method thereof
  • Biodegradable agricultural mulching film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0063] The invention provides a method for preparing a biodegradable agricultural mulch film, comprising the following steps:

[0064] The raw materials are sequentially melt blended, granulated and blow molded to obtain a biodegradable agricultural mulch film;

[0065] The raw materials include 20-80 parts by weight of ultra-high molecular weight polypropylene carbonate, 15-75 parts by weight of high-molecular-weight polyester, 0.2-1.5 parts by weight of chain extender and 2-25 parts by weight of nano-fillers with lamellar structure;

[0066] The number-average molecular weight of described ultra-high molecular weight polypropylene carbonate ≥ 300kDa; Described high molecular weight polyester comprises poly(butylene adipate-butylene terephthalate) and / or carbon dioxide-based poly( Carbonate-ether) type polyurethane; the number average molecular weight of the high molecular weight polyester is 80-150kDa.

[0067] In the preparation method provided by the invention, the raw ma...

Embodiment 1

[0076] Preparation of Carbon Dioxide Based Poly(carbonate-ether) Polyurethane

[0077] Add 32kg propylene oxide, 50g Co-Zn double metal cyanide as a catalyst, 0.9L dry polypropylene glycol with a molar mass of 350g / mol, stir for 1h, pressurize carbon dioxide to 5MPa, and heat up to After reacting for 6 hours at 75°C, the reaction product was precipitated and separated to obtain carbon dioxide-based poly(carbonate-ether) glycol.

[0078] Using gel permeation chromatography (GPC) analysis, polymer molecular weight 2200Da, using hydrogen nuclear magnetic resonance spectrum analysis (H 1 -NMR) copolymer ether segment content 25%.

[0079] Add 70mol of terephthalic acid, 30mol of adipic acid, 100mol of butanediol and 9g of tetrabutyl titanate into a 50L polymerization reactor, under nitrogen protection, and react at 235°C. When the water output reaches the theoretical water output, the temperature is raised to 255°C. The pressure was reduced to 50Pa, and the reaction was continue...

Embodiment 2

[0082] Preparation of agricultural mulch

[0083] 20 parts by weight of PPC (number average molecular weight 320kDa, weight average molecular weight 950kDa), 70 parts by weight of PBAT (number average molecular weight 85kDa, weight average molecular weight 162kDa), 0.2 parts by weight of free radical scavenger UV-622, 0.3 parts by weight of ultraviolet absorber UV-571, 0.5 parts by weight of BASF epoxy chain extender ADR-4370, 0.3 parts by weight of erucamide and 8.7 parts by weight of nano-montmorillonite (diameter-thickness ratio: 130, thickness: 30nm) are mixed in a mixer Uniform, granulate with twin-screw extruder at 120°C-180°C, after cooling and drying, use conventional single-screw film blowing equipment to blow a film with a thickness of 0.006mm at 100°C-150°C.

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
Tensile strengthaaaaaaaaaa
Water vapor transmission rateaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of film materials and particularly relates to a biodegradable agricultural mulching film and a preparation method thereof. The biodegradable agricultural mulching film is prepared from the following raw materials in parts by weight: 20-80 parts of ultra-high molecular weight polypropylene carbonate, 15-75 parts of high molecular weight polyester, 0.2-1.5 parts of a chain extender and 2-25 parts of a laminar nano-filler, wherein the number-average molecular weight of ultra-high molecular weight polypropylene carbonate is larger than or equal to 300 kDa; high molecular weight polyester comprises poly (ethylene succinate-butylene terephthalate) and / or carbon dioxide-based poly (carbonic ester-ether) polyurethane; the number-average molecular weight of high molecular weight polyester is 80 kDa-200 kDa. Ultra-high molecular weight polypropylene carbonate, high molecular weight polyester, the chain extender and the laminar nano-filler serve as the raw materials, and by virtue of the synergistic effect of the raw materials, the mechanical strength and the moisturizing property of the mulching film are improved.

Description

Technical field [0001] The invention belongs to the field of film materials, and in particular relates to a biodegradable agricultural mulch film and a preparation method thereof. Background technique [0002] Agricultural mulch film can not only increase soil temperature, maintain soil moisture, and maintain soil structure, but also prevent insects and weeds, and increase crop yields. It is an indispensable key material for modern agriculture and was once considered the white revolution in agriculture. Since 1978, the application of mulch film in my country has made great progress. In 2013, the national agricultural mulch film coverage reached 380 million acres, and the usage reached 1.3 million tons, making a huge contribution to solving my country's food self-sufficiency and vegetable supply. It is predicted that in the next 10 years, the amount of mulch film used in my country will increase by about 10%, and the coverage area is expected to reach 500 million acres in the...

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
IPC IPC(8): C08L67/02C08L69/00C08L75/08C08K13/02C08K3/34C08K5/20C08K5/09A01G13/02
CPCA01G13/0275C08J5/18C08J2367/02C08J2369/00C08J2375/08C08J2469/00C08J2475/08C08K2201/011C08L67/02C08L69/00C08L75/08C08L2201/06C08L2203/16C08L2205/03C08K13/02C08K3/346C08K5/20C08K3/34C08K5/09Y02A40/28
Inventor 周庆海高凤翔王献红王佛松
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com