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PLA/PBAT biodegradable composite material and preparation method thereof

A composite material and biodegradable technology, which is applied in the field of PLA/PBAT biodegradable composite materials and its preparation, can solve problems such as poor compatibility, and achieve the effects of improved toughness, excellent tensile strength, and good chemical stability

Inactive Publication Date: 2013-08-21
LINONGFENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between PBAT and PLA in this fully degradable biomaterial, its toughness and strength need to be further improved.

Method used

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  • PLA/PBAT biodegradable composite material and preparation method thereof
  • PLA/PBAT biodegradable composite material and preparation method thereof
  • PLA/PBAT biodegradable composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] In the torque rheometer (Hacke, Germany), add 60g EVA (Escorene Ultra Lot.61E466, Exxon Mobil, the content of vinyl acetate (mass fraction) is 27%), the temperature is 160 ℃, two rotors The direction of rotation of the two rotors is opposite, the speed of the two rotors is 40 rpm, and the heating is maintained for 40 minutes. Then turn on the torque rheometer, and add the catalyst Ti(OPr) with a mass of 2g 4 and polylactic acid with a mass of 40g (Natureworks2002D, LD mixed polylactic acid). Under the original temperature conditions, continue heating for 30 minutes, that is, react at 160 ° C for 30 minutes, add the obtained product into 120 mL of acetone, then filter to obtain the undissolved product, and then add it into 60 mL of hot toluene ( 80°C), the crude graft copolymer was obtained by filtration, and finally washed with methanol, placed in a vacuum drying oven at a temperature of 90°C, and dried for 20 minutes to obtain an EVA-PLA grafted copolymer with a PLA m...

Embodiment 2～12

[0061] The PLA / PBAT biodegradable composite material adopts the following raw materials in weight percentage:

[0062]

[0063] Among them, polylactic acid adopts Natureworks2002D, LD mixed type polylactic acid; polyadipate / butylene terephthalate adopts the product produced by BASF company Polycaprolactone adopts the product produced by Belgian Solvay Caprolactones company, and its weight average molecular weight is 68000; %). Vegetable oil polyols can adopt commercially available products.

[0064] Mix polylactic acid, polyadipate / butylene terephthalate, polycaprolactone, ethylene-vinyl acetate copolymer, ethylene-vinyl acetate copolymer with polylactic acid graft copolymer and vegetable oil polyol, The mixed material is fed into a twin-screw extruder for melt blending, then drawn into strands and pelletized to obtain a PLA / PBAT biodegradable composite material.

[0065] The temperature of melt blending is 160°C, 165°C, 165°C, 170°C, 170°C, 165°C, 165°C, 160°C in each ...

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Abstract

The invention discloses a PLA / PBAT biodegradable composite material, which is prepared from the following components in percentage by weight: 60-75% of a polylactic acid, 60-75% of poly(adipic acid) / butylene terephthalate, 1-5% of poly (caprolactone), 5-15% of an ethylene-vinyl acetate copolymer, 1-5% of an ethylene-vinyl acetate copolymer and polylactic acid graft copolymer, and 1-10% of vegetable oil polyols. The PLA / PBAT biodegradable composite material disclosed by the invention is excellent in tensile strength and toughness, good in chemical stability, and easy to process, and in addition, the material is biodegradable. The invention also discloses a preparation method of the PLA / PBAT biodegradable composite material, which can be implemented through the existing equipment twin-screw extruder, therefore, the method is easy to implement, strong in maneuverability, and easy to realize industrialized mass production, and has good economic benefits and broad application prospects.

Description

technical field [0001] The invention relates to the field of plastic materials, in particular to a PLA / PBAT biodegradable composite material and a preparation method thereof. Background technique [0002] The plastic industry has developed rapidly, and its use has penetrated into various fields of the national economy, and its use is very extensive. China produces about 5 million tons of waste plastics every year, most of which are polypropylene (PP), polyethylene (PE) and polystyrene (PS) materials, which cannot be decomposed naturally. Therefore, if the disposable plastic packaging waste made of PP material, PE material and PS material and its corresponding agricultural film and disposable tableware are randomly discarded, they will be piled up on the land due to their non-degradability, causing serious damage. White pollution, and this potential pollution will also intensify with the increase of people's usage and the accumulation of time. At present, my country's white p...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L23/08C08L87/00C08K5/053C08G81/02
Inventor 王惠群
Owner LINONGFENG TECH
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