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A kind of degradation controllable pbat/pla 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, decreased material performance, poor material stability, etc., to achieve good light stability and antibacterial properties, phase The effect of improved capacitance and enhanced bonding force

Active Publication Date: 2018-07-13
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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  • A kind of degradation controllable pbat/pla composite film and preparation method thereof
  • A kind of degradation controllable pbat/pla composite film and preparation method thereof
  • A kind of degradation controllable pbat/pla composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0053]

[0054] Among them, the antibacterial compatibilizer is:

[0055]

[0056] Where R is -CH 3 Or -CH 2 CH 3 .

[0057] A method for preparing a degradable and controllable PBAT / PLA composite film includes the following steps:

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

[0059] (2) The dried PLA particles, PBAT particles, antibacterial compatibilizer, tetrabutyl titanate and calcium carbonate are mixed uniformly in proportions and then added to the twin-screw extruder for extrusion and granulation, and the extruder is set The temperature of each zone is between 170-185℃;

[0060] (3) The PBAT / PLA blend particles obtained in step (2) are added to the plastic film blowing machine for film blowing to prepare a PBAT / PLA composite fi...

Embodiment 2-6

[0061] Examples 2-6, Comparative Examples 1-4 are the same as Example 1, the difference lies 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 of the 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 life quality requirements, the development of fully biodegradable polymer materials has become a research hotspot at home and abroad. [0003] Recycling of mulch film and development of fully degradable mulch film are currently the two directions for solving mulch film pollution in the world. Among them, the degradable film saves farme...

Claims

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Application Information

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Patent Type & Authority Patents(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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