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Lignin-starch combined masterbatch composite biodegradable polyester material and preparation method thereof

A biodegradable polyester, a technology for degrading polyester, applied in the field of biodegradable polyester materials and their preparation, can solve problems such as poor interfacial compatibility, achieve good light blocking, promote dispersibility, good processability and mechanical properties Effect

Active Publication Date: 2019-11-05
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the starch molecular chain contains a large number of hydroxyl groups, it has strong polarity and hydrophilicity, and when it is polymerized with a non-polar or weakly polar matrix, it often causes the problem of poor interfacial compatibility.

Method used

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  • Lignin-starch combined masterbatch composite biodegradable polyester material and preparation method thereof
  • Lignin-starch combined masterbatch composite biodegradable polyester material and preparation method thereof
  • Lignin-starch combined masterbatch composite biodegradable polyester material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The lignin, starch and polybutylene terephthalate-adipate were vacuum-dried at 85° C. for 6 hours. Take 35 parts of organic solvent lignin, 50 parts of corn starch, 2 parts of ethylene bis stearic acid amide and 15 parts of ethylene glycol and fully mix them in a high-speed mixer at a speed of 900 rpm and a mixing time of 5 minutes to obtain a premix ; Melt and extrude the premixed material through a twin-screw extruder to obtain a combined masterbatch, and the temperature of the twin-screw extruder is set at 140-180°C; Butylene glycol ester is melt-extruded and granulated at 140-180°C by a twin-screw extruder to obtain composite particles; the composite particles are blown into film / injection molded strips at a temperature of 140-180°C.

[0036] The tensile strength, elongation at break, right-angle tear strength and absorbance of the degradable film that embodiment 1 obtains are tested, and test data is as table 1 and figure 1 shown.

[0037] The tensile strength, e...

Embodiment 2

[0039] The lignin, starch and polybutylene terephthalate-adipate were vacuum-dried at 85° C. for 6 hours. Get 20 parts of kraft lignin, 60 parts of potato starch, 2 parts of butyl stearate and 20 parts of glycerin and fully mix them in a high-speed mixer with a rotating speed of 900 rpm and a mixing time of 5 minutes to obtain a premix; The material is melt-extruded through a twin-screw extruder to obtain a combined masterbatch, and the temperature of the twin-screw extruder is set at 140-180°C; the obtained combined masterbatch is compounded with 60 parts of polybutylene terephthalate-adipate The ester is melt-extruded and granulated by a twin-screw extruder at 140-180°C to obtain composite particles; the composite particles are blown into film / injection molded strips at a temperature of 140-180°C.

[0040] The tensile strength, elongation at break, right-angle tear strength and absorbance of the degradable film that embodiment 2 obtains are tested, and test data is as table ...

Embodiment 3

[0043] The lignin, starch and polybutylene succinate-adipate were vacuum-dried at 85° C. for 6 hours. Get 15 parts of alkali-extracted lignin, 60 parts of tapioca starch, 2 parts of butyl stearate and 25 parts of glycerin and fully mix them in a high-speed mixer with a rotating speed of 900 rpm and a mixing time of 5 minutes to obtain a premix; The mixture is melted and extruded by a twin-screw extruder to obtain a combined masterbatch, and the temperature of the twin-screw extruder is set at 140-180°C; take 30 parts of the combined masterbatch and compound 70 parts of polysuccinic acid-butylene adipate The ester is melt-extruded and granulated by a twin-screw extruder at 140-180°C to obtain composite particles; the composite particles are blown into film / injection molded strips at a temperature of 140-180°C.

[0044] The tensile strength, elongation at break, right-angle tear strength and absorbance of the degradable film that embodiment 3 obtains are tested, and test data is...

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Abstract

The invention discloses a lignin-starch combined masterbatch composite biodegradable polyester material and a preparation method thereof. Lignin, starch, a plasticizer and a lubricant are premixed ina high-speed mixer, and then the premix is subjected to melt extrusion by a twin-screw extruder at 140-180 DEG C to obtain combined masterbatches; the obtained particles are compounded with degradablepolyester, and secondary melt extrusion granulation is conducted by the twin-screw extruder at 140-180 DEG C; finally, the obtained composite particles are subjected to injection molding / compressionmolding / blow molding film formation at 140-180 DEG C. According to the lignin-starch combined masterbatch composite biodegradable polyester material and the preparation method thereof, a reactive extrusion process is utilized, the lignin serves as a novel modifier of starch to replace a traditional polymer modifier with side-grafted carboxylic acid groups, the retrogradation of plasticized starchis prevented, the use amount of biomass is increased, the cost is reduced, the use of non-degradable materials is reduced at the same time, and the environmental friendliness and sustainability of thematerial are improved. The good compatibility between the combined masterbatches and the degradable polyester makes the composite biodegradable polyester material have good mechanical properties.

Description

technical field [0001] The invention belongs to the field of polymer composite materials, and in particular relates to a biodegradable polyester material compounded with lignin-starch composite masterbatch and a preparation method thereof. Background technique [0002] With the continuous consumption of non-renewable petrochemical resources and the deterioration of the ecological environment, more and more attention has been paid to the development and utilization of renewable resources. As a polysaccharide polymer compound, starch can be rapidly biodegraded and returned to nature in the form of carbon dioxide and water. It has been widely used in the field of biodegradable materials. However, since the starch molecular chain contains a large number of hydroxyl groups, it has strong polarity and hydrophilicity, and when it is polymerized with a non-polar or weakly polar matrix, it often causes the problem of poor interfacial compatibility. Contents of the invention [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L97/00C08L3/02C08K5/20C08K5/053C08J5/18C08J3/22
CPCC08J5/18C08J3/226C08J2367/02C08J2497/00C08J2403/02C08K5/20C08K5/053
Inventor 应汉杰贾运秀李明朱晨杰庄伟唐成伦谭卓涛沈涛柳东陈勇牛欢青杨朋朋吴菁岚高南欧阳平凯
Owner NANJING TECH UNIV
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