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High-starch full biodegradable composition and preparation method thereof

A Biodegradable Polyester, Whole Biotechnology

Active Publication Date: 2014-10-29
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compatibility between thermoplastic starch and polyester matrix is ​​often poor, thereby limiting the amount of thermoplastic starch added. Therefore, the key to preparing high-performance and low-cost compositions is to solve the problem of poor compatibility between thermoplastic starch and polyester matrix.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) Dry corn starch and PBAT in a blast oven at 80°C for 6 hours, and dry talc (with a particle size of 2000 mesh) in a blast oven at 120°C for 5 hours.

[0050] (2) Then take 90 parts of corn starch, 10 parts of PBAT, 40 parts of plasticizer glycerol, 0.5 parts of compatibilizer maleic anhydride, 0.05 parts of initiator DCP, 0.5 parts of hydrophobic modifier alkenyl succinic anhydride, 0.2 parts of calcium stearate as lubricant, 0.2 parts of tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester as anti-oxidant, and 5 parts of filler talc in high-mixer Mix at room temperature for 10 minutes.

[0051] (3) The mixture obtained in step (2) is added to the twin-screw extruder to be extruded and granulated to obtain a fully biodegradable thermoplastic starch masterbatch. The temperature of each zone of the twin-screw extruder is 90℃ in the first zone and 110 in the second zone. ℃, three-zone 120℃, four-zone 130℃, five-zone 140℃, six-zone 150℃, head 15...

Embodiment 2

[0054] (1) The tapioca starch and PBAT were dried in a 60°C blast oven for 24 hours, and calcium carbonate (with a particle size of 2500 mesh) was dried in a 110°C blast oven for 8 hours.

[0055] (2) Then take 70 parts of tapioca starch, 30 parts of PBAT, 20 parts of plasticizer glycerol, 10 parts of plasticizer formamide, 1.5 parts of compatibilizer POE-g-MAH, 1 part of initiator BPO, alkylene 2 parts of ketone dimer, 0.5 parts of erucamide, 0.4 parts of tris(2.4-di-tert-butylphenyl) phosphite, and 10 parts of calcium carbonate are mixed in a high-mixer at room temperature for 10 minutes.

[0056] (3) The mixture obtained in step (2) is added to the twin-screw extruder to be extruded and granulated to obtain a fully biodegradable thermoplastic starch masterbatch. The temperature of each zone of the twin-screw extruder is 90℃ in the first zone and 110 in the second zone. ℃, three-zone 120℃, four-zone 130℃, five-zone 140℃, six-zone 150℃, head 155℃; screw speed 250rpm, length to dia...

Embodiment 3

[0059] (1) Dry potato starch and PBAT in a 65℃ blast oven for 10 hours, and dry kaolin (with a particle size of 3000 mesh) in a 100℃ blast oven for 10 hours;

[0060] (2) Then take 80 parts of potato starch, 20 parts of PBAT, 20 parts of plasticizer glycerol, 10 parts of plasticizer urea, 3 parts of POE-g-MAH, 1.5 parts of BPO, 4 parts of alkyl ketene dimer , 0.6 parts of oleic acid amide, 0.5 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl) stearyl propionate, and 2 parts of kaolin are mixed in a high mixer at room temperature for 10 minutes;

[0061] (3) The mixture obtained in step (2) is added to a twin-screw extruder to be extruded and granulated to obtain a fully biodegradable thermoplastic starch masterbatch. The temperature of each zone of the twin-screw extruder is 90℃ in the first zone and 110 in the second zone. ℃, three-zone 120℃, four-zone 130℃, five-zone 140℃, six-zone 150℃, head 155℃; screw speed 100rpm, length to diameter ratio 40 / 1;

[0062] (4) Take 80 parts of therm...

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PUM

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Abstract

The invention belongs to the technical field of high molecular materials, and relates to a high-starch full biodegradable composition and a preparation method thereof. The high-starch full biodegradable composition comprises the following components in parts by weight: 10-80 parts of full biodegradable thermoplastic starch masterbatches, 20-90 parts of biodegradable polyester and 0.3-5 parts of compatilizers. The full biodegradable composition provided by the invention has the advantages of high starch content and good compatibility of starch and a substrate and ensures the mechanical property the material in a long-time storage process; a film product prepared by using the composition can be greatly reduced in cost.

Description

Technical field [0001] The invention belongs to the technical field of polymer materials and relates to a fully biodegradable composition and a preparation method thereof. Background technique [0002] The use of plastic films has penetrated into all areas of people's lives and is widely used as food packaging, electronic and electrical product packaging, shopping mall shopping bags, garbage bags, etc. The raw materials of traditional plastic film materials such as polypropylene (PP) film and polyethylene (PE) film are petroleum, which is difficult to degrade when discarded in nature after use, causing huge harm to the environment. With the increasing depletion of petroleum resources and people's increasing awareness of environmental protection, the development of fully degradable, environmentally friendly polymer materials for application in the field of thin film materials has become the mainstream of future development. [0003] Polylactic acid (PLA), polybutylene succin...

Claims

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Application Information

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IPC IPC(8): C08L67/02C08L51/02C08L51/08C08L51/06C08K13/02C08K3/26C08K3/34C08K3/36C08K5/1539C08F291/08C08J3/22B29C47/92B29C48/92
Inventor 杨桂生袁角亮
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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