Controllable-degradation PBAT/PLA (poly(butyleneadipate-co-terephthalate)/polylactic acid) composite film and preparation method thereof

A composite membrane, calcium carbonate technology, applied in the field of PBAT/PLA blending and compatibilization, can solve the problems of easy penetration of low molecular substances, poor material stability, unsatisfactory and other problems, and achieve good light stability and antibacterial properties, phase The effect of improved capacitance and enhanced binding force

Active Publication Date: 2017-05-17
常州绿之源高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PLA / PBAT alloy was compatibilized and modified by polyethylene glycol (PEG) compatibilizer. Poor properties, low molecular substances are prone to permeation and migration during the use and storage of materials, and ultimately degrade the performance of materials

Method used

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  • Controllable-degradation PBAT/PLA (poly(butyleneadipate-co-terephthalate)/polylactic acid) composite film and preparation method thereof
  • Controllable-degradation PBAT/PLA (poly(butyleneadipate-co-terephthalate)/polylactic acid) composite film and preparation method thereof
  • Controllable-degradation PBAT/PLA (poly(butyleneadipate-co-terephthalate)/polylactic acid) composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A PBAT / PLA composite film with controllable degradation, comprising the following components and parts by weight:

[0053]

[0054] Wherein the antibacterial compatibilizer is:

[0055]

[0056] Among them, R is -CH 3 or -CH 2 CH 3 .

[0057] A method for preparing a degradation-controllable PBAT / PLA composite film, comprising the steps of:

[0058] (1) Weigh the raw materials according to the parts by weight of the above components, and dry the PLA particles and PBAT particles in a vacuum drying oven at 70°C for 3-5h;

[0059] (2) Mix the dried PLA granules, PBAT granules, antibacterial compatibilizer, tetrabutyl titanate and calcium carbonate in proportion and add them to a twin-screw extruder for extrusion granulation. Set the extruder The temperature in each zone is between 170-185°C;

[0060] (3) Add the PBAT / PLA blended particles obtained in step (2) into a plastic blown film machine to blow film to form a PBAT / PLA composite film, wherein the temperatu...

Embodiment 2-6

[0061] Embodiment 2-6, comparative example 1-4 are the same as embodiment 1, and difference is in table 1:

[0062] Table 1:

[0063]

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Abstract

The invention relates to the technical field of PBAT/PLA (poly(butyleneadipate-co-terephthalate)/polylactic acid) blend compatibilization, particularly a controllable-degradation PBAT/PLA composite film. The controllable-degradation PBAT/PLA composite film comprises the following components in parts by weight: 50-60 parts of PBAT, 10-30 parts of PLA, 10-20 parts of calcium carbonate, 0.5-2 parts of antibacterial compatibilizer and 0.5-2 parts of tetrabutyl titanate. The mass ratio of the PLA to the calcium carbonate is (1-3):1. The PLA/calcium carbonate proportion is strictly controlled and restricted within the range of (1-3):1; and the PLA/calcium carbonate proportion can be regulated to control the degradation start time of the PBAT/PLA composite film at 60-90 days and control the complete degradation time at 120-150 days.

Description

technical field [0001] The invention relates to the technical field of PBAT / PLA blending and compatibilization, in particular to a degradation-controllable PBAT / PLA composite film and a preparation method thereof. Background technique [0002] With the rapid development of the national economy, the use of polymer materials has penetrated into all areas of people's lives, bringing great convenience to our lives. However, most commonly used polymer materials are difficult to biodegrade, which leads to serious environmental pollution problems, such as "white pollution". With people's high attention to environmental issues and the improvement of quality of life requirements, the development of fully biodegradable polymer materials has become a research hotspot at home and abroad. [0003] Recycling mulch film and developing fully degradable mulch film are two directions to solve the pollution of mulch film in the world. Among them, degradable mulch film saves the two links of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L67/04C08L71/02C08K3/26C08K5/10C08K9/04C08G65/333C08G65/332C08J5/18
CPCC08G65/3326C08G65/33317C08G65/33396C08J5/18C08J2367/02C08J2467/04C08J2471/02C08L67/02C08L2201/06C08L2203/16C08L2205/02C08L2205/03C08L67/04C08L71/02C08K2003/265C08K5/10C08K9/04
Inventor 彭呈褚鹏飞
Owner 常州绿之源高分子材料有限公司
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