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Full-biodegradable toughened polylactic acid composite material and preparation method thereof

A composite material and polylactic acid technology, which is applied in the field of fully biodegradable and toughened polylactic acid composite material and its preparation, can solve the problems such as the inability of the compatibilizer to achieve biodegradation, the violation of green and sustainable goals, environmental pollution, etc. Inexpensive, improved compatibility, wide-ranging effects

Active Publication Date: 2021-06-04
JIAXING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, conventional compatibilizers cannot achieve biodegradation, causing inevitable pollution to the environment during use, which violates the goal of green sustainability

Method used

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  • Full-biodegradable toughened polylactic acid composite material and preparation method thereof
  • Full-biodegradable toughened polylactic acid composite material and preparation method thereof
  • Full-biodegradable toughened polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Add 2.0g polycaprolactone, 2.4g epoxidized soybean oil and 0.012g triphenylphosphine into a 150mL three-necked flask, heat to 100°C, stir mechanically for 120min, cool down to room temperature, remove free epoxidized soybean oil with ethanol , drying to obtain polycaprolactone (PCL-g-ESO) grafted with epoxy soybean oil molecules. Thereafter, the polylactic acid and polycaprolactone were vacuum-dried at 80° C. for 36 hours to remove the solvent remaining in the polymer. 40g of polylactic acid, 20g of polycaprolactone and 0.2g of polycaprolactone grafted with epoxidized soybean oil molecules were added to the melt blending equipment at the same time, the temperature was 190°C, the rotation speed was 30rpm, and the mixing time was 10min. Then the material is discharged to obtain the toughened polylactic acid composite material, which is denoted as PLLA / PCL / PCL-g-ESO (60 / 40 / 0.4).

Embodiment 2

[0032] Add 1.0g polycaprolactone, 1.8g epoxidized soybean oil and 0.01g triphenylphosphine into a 150mL three-necked flask, heat to 120°C, stir mechanically for 100min, cool down to room temperature, remove free epoxidized soybean oil with ethanol , drying to obtain polycaprolactone (PCL-g-ESO) grafted with epoxy soybean oil molecules. Thereafter, the polylactic acid and polycaprolactone were vacuum-dried at 80° C. for 24 hours to remove the solvent remaining in the polymer. 35g of polylactic acid, 15g of polycaprolactone and 0.1g of polycaprolactone grafted with epoxidized soybean oil molecules were added to the melt blending equipment at the same time, the temperature was 190°C, the rotation speed was 30rpm, and the mixing time was 10min. Then the material is discharged to obtain the toughened polylactic acid composite material, which is denoted as PLLA / PCL / PCL-g-ESO (70 / 30 / 0.2).

[0033] Such as figure 1 As shown, the changes in the microstructure of the polymer composite...

Embodiment 3

[0035] Add 1.0g polycaprolactone, 1.0g epoxidized soybean oil and 0.0005g 2-aminomethylpyridine into a 150mL three-necked flask, heat to 115°C, stir mechanically for 80min, cool down to room temperature, and remove free epoxide with ethanol Soybean oil was dried to obtain polycaprolactone (PCL-g-ESO) grafted with epoxidized soybean oil molecules. Thereafter, the polylactic acid and polycaprolactone were vacuum-dried at 80° C. for 24 hours to remove the solvent remaining in the polymer. 30g of polylactic acid, 20g of polycaprolactone and 0.1g of polycaprolactone grafted with epoxidized soybean oil molecules were added to the melt blending equipment at the same time, the temperature was 190°C, the rotation speed was 30rpm, and the mixing time was 10min. Then the material is discharged to obtain the toughened polylactic acid composite material, which is denoted as PLLA / PCL / PCL-g-ESO (60 / 40 / 0.2).

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Abstract

The invention relates to a preparation method of a full-biodegradable toughened polylactic acid composite material, which comprises the following steps: polycaprolactone, epoxidized soybean oil and a catalyst are put into a first container, and the mass ratio of the epoxidized soybean oil to the polycaprolactone to the catalyst is 100:(10-100):(0.05-5.0); the preparation method comprises the following steps: respectively carrying out vacuum drying on polylactic acid and polycaprolactone at 60-100 DEG C for 24-78 hours; adding the dried polylactic acid and polycaprolactone in the step (2) and the product obtained in the step (1) into melting and mixing equipment for melting and mixing for 3-60 minutes; and then discharging and granulating the mixture and carrying out compression molding. The polylactic acid / polycaprolactone composite material disclosed by the invention has the characteristic of full biodegradation, and shows excellent toughness and impact resistance at the same time.

Description

technical field [0001] The invention relates to a fully biodegradable toughened polylactic acid composite material and a preparation method thereof, in particular to a polylactic acid composite material toughened by reactive blending technology and a preparation method thereof. Background technique [0002] With the development of society and technology, the extensive use of polymer materials has caused irreversible impacts on the environment, seriously affecting all aspects of human life. Scientists urgently need to find substitutes for traditional general-purpose polymers, so as to reduce the damage of polymer materials to the environment. Polylactic acid has good biodegradability and biocompatibility, and can eventually be decomposed into carbon dioxide and water, which can well solve the problem that traditional polymers are not easy to degrade. At the same time, polylactic acid has good thermoplasticity, processability and good mechanical properties, and has good appli...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L87/00C08G81/00
CPCC08L67/04C08G81/00C08L2201/06C08L2205/025C08L2205/03C08L87/005
Inventor 管纪鹏沈小军杨雅茹唐柏林
Owner JIAXING UNIV
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