Anti-aging flame-retardant polylactic acid material and preparation method thereof

A polylactic acid material and anti-aging technology, applied in the field of degradable polymer materials, can solve the problems of limited application fields, easy aging and degradation, etc., and achieve the effect of strong combustion-to-charcoal ability and good absorption effect

Pending Publication Date: 2022-01-25
HUAIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PLLA is flammable and easy to age and degrade in the air, these shortcomings too limit its application field

Method used

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  • Anti-aging flame-retardant polylactic acid material and preparation method thereof
  • Anti-aging flame-retardant polylactic acid material and preparation method thereof
  • Anti-aging flame-retardant polylactic acid material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 10 napper lignin, 1 part of stearic acid and 8 parts of polyphosphate were high-speed ball milling in the ball mill, resulting in a mixture of D50 of 8.1 microns; 40 parts of PLLA, pulverized mixture, 2 part antioxidants, DDI (DDI) 15% of acid lignin) and AllChem 360 (0.6% DDI) were mixed in a high mixing machine to obtain precursor 1. The precursor was extruded by a twin-screw extruder, granulated anti-aging flame retardant PLA material mother particles; mixing the mother particles with 60 parts of PLLA and 5 parts of PBS in a high mixing machine to obtain a precursor 2, and the precursor is used to melt co-extruder, granulation Old flame retardant PLLA material. Two-screw extruder (masterbatch preparation) one district 130 ° C, two districts 150 ° C, three regions 170 ° C, four regions 180 ° C, five districts 190 ° C, six districts 190 ° C, machine head 190 ° C, screw speed 150 rpm. Two-screw extruder (anti-aging flame retardant PLLA material production) 120 ° C, two dist...

Embodiment 2

[0031] 15 pieces of acidic lignin, 2 parts of stearic acid and 5 parts of polyphosphate were high-speed ball milling in the ball mill, resulting in a mixture of D50 of 1.8 microns; 50 parts of PLLA, a pulverized mixture, 1 part antioxidant, DDI ( 10% of acid lignin) and AllChem 360 (1% of DDI) were mixed in a high mixing machine to obtain a precursor, and the precursor was extruded by a twin-screw extruder, granulated anti-aging flame retardant PLA material mother particles; mixing the masterbatch with 50 parts of PLLA and 8 parts of PBS in a high mixing machine to obtain a precursor 2, and the precursor is used to melt co-extrusion, granulation Old flame retardant PLLA material. Twin screw extruder (masterbatch preparation) one district 130 ° C, two districts 150 ° C, three regions 170 ° C, four districts 180 ° C, five districts 190 ° C, six districts 195 ° C, head 195 ° C, screw speed 120 rpm. Twin screw extruder (anti-aging flame retardant PLLA material) 120 ° C, two districts ...

Embodiment 3

[0033] 2 parts of acidic lignin, 2 parts of stearic acid and 10 parts of polyphosphate were high-speed ball milling in the ball mill, resulting in a mixture of D50 of 14.3 microns; 30 parts of PLLA, pulverized mixture, 1.5 parts of antioxidants, DDI ( 20% of acid lignin) and AllChem 360 (1% of DDI) were mixed in a high mixing machine to obtain precursor, and the precursor was extruded by a twin-screw extruder, granulated anti-aging flame retardant PLA material mother particles; mixing the masterbatch with 70 parts of PLLA and 2 parts of PBS in a high mixing machine to obtain a precursor 2, and the precursor is used to melt co-extruder, granulated a kind of resistance Old flame retardant PLLA material. Twin screw extruder (masterbatch preparation) 125 ° C, two districts 145 ° C, three districts 165 ° C, four districts 175 ° C, five districts 185 ° C, six regions 185 ° C, head 185 ° C, screw rotation speed 200 rpm. Two-screw extruder (anti-aging flame retardant PLLA material prepara...

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Abstract

The invention relates to an anti-aging flame-retardant polylactic acid material and a preparation method thereof. The anti-aging flame-retardant polylactic acid material is prepared from the following raw materials in parts by weight: 100 parts of polylactic acid (PLLA), 2-8 parts of poly (butylene succinate) (PBS), 1-2 parts of stearic acid, 2 parts of an antioxidant, 2-15 parts of acidic lignin, 5-10 parts of ammonium polyphosphate (APP), dimer acid diisocyanate (DDI) accounting for 5%-20% of the acidic lignin, and a catalyst ALLCHEM360 accounting for 0.5%-1% of the DDI. The anti-aging flame-retardant polylactic acid material prepared by the invention is excellent in mechanical property, strong in ultraviolet aging resistance, good in flame retardance, simple in preparation process and easy to industrialize.

Description

Technical field [0001] The present invention relates to the field of degradable polymer materials, and more particularly to an anti-aging flame retardant polylactic acid material and a preparation method thereof. Background technique [0002] PLLA has good biodegradable. After use, it can be completely degraded by microorganisms in nature. The final degradation product is carbon dioxide and water, and there is no contamination of the environment, which is a recognized environmentally friendly material. In addition, PLLA also has good mechanical properties and physical properties, suitable for blow molding, thermoplastics, etc., easy to process, and has a wide range of applications. However, PLLA is flammable, and it is easy to aging in the air, and these shortcomings have limited their application. [0003] Industrial lignin as one of the papermaking by-products is a low price, extensive source of source; high combustion of high carbon, has certain flame retardant properties, ant...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L75/04C08K3/32C08K5/09
CPCC08L67/04C08L2201/02C08L2201/08C08K2003/323C08L67/02C08L75/04C08K3/32C08K5/09
Inventor 舒友罗琼林欧阳跃军林红卫向德轩于佳欢聂梦圆卢嘉仪周沐阳何宇恒
Owner HUAIHUA UNIV
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