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A kind of high-strength and high-toughness fully degradable polylactic acid composite material and preparation method thereof

A composite material, high-strength and high-toughness technology, applied in the field of high-strength and high-toughness fully degradable polylactic acid composite material and its preparation, composite material and its preparation field, can solve problems such as difficult degradation of elastomers, achieve improved toughness, low production cost, The effect of improving overall performance

Active Publication Date: 2017-08-18
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In addition, traditional elastomers such as ABS are difficult to degrade in the natural environment, while improving the mechanical properties of polylactic acid, they sacrificed valuable biodegradability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Raw material preparation: Weigh respectively in parts by mass: 90 parts of polylactic acid resin 2002D, 10 parts of polytrimethylene carbonate with a weight average molecular weight of 100,000, and 1 part of antioxidant 1010;

[0056]And according to graphene oxide being 0.1% of the total mass of polylactic acid resin 2002D and polytrimethylene carbonate, weigh powdered graphene oxide.

[0057] Preparation method: Put the above-mentioned raw materials into an oven, dry at 70°C for 4-6 hours; take them out, add them into a high-speed mixer and mix until uniform;

[0058] Then put the uniformly mixed material into a screw extruder and extrude at 160-180°C to obtain the product. Wherein, the rotational speed of the extruder is 30 rpm.

[0059] The prepared composite materials were injection molded into standard test specimens in an injection molding machine, and the tensile strength, elongation at break, and Charpy notched impact strength were tested respectively. The res...

Embodiment 2

[0061] Raw material preparation: Weigh respectively in parts by mass: 80 parts of polylactic acid resin 2002D, 20 parts of polytrimethylene carbonate with a weight average molecular weight of 100,000, and 1 part of antioxidant 1010;

[0062] And according to graphene oxide being 0.5% of the total mass of polylactic acid resin 2002D and polytrimethylene carbonate, weigh powdery graphene oxide.

[0063] Preparation method: Put the above-mentioned raw materials into an oven, dry at 70°C for 4-6 hours; take them out, add them into a high-speed mixer and mix until uniform;

[0064] Then put the uniformly mixed material into a screw extruder and extrude at 160-180°C to obtain the product. Wherein, the rotational speed of the extruder is 40rpm.

[0065] The prepared composite materials were injection molded into standard test specimens in an injection molding machine, and the tensile strength, elongation at break, and Charpy notched impact strength were tested respectively. The resu...

Embodiment 3

[0067] Raw material preparation: Weigh respectively according to parts by mass: 70 parts of polylactic acid resin 2002D, 30 parts of polytrimethylene carbonate with a weight average molecular weight of 100,000, and 1 part of antioxidant 1010;

[0068] And according to graphene oxide being 1.0% of the total mass of polylactic acid resin 2002D and polytrimethylene carbonate, weigh powdery graphene oxide.

[0069] Preparation method: Put the above-mentioned raw materials into an oven, dry at 70°C for 4-6 hours; take them out, add them into a high-speed mixer and mix until uniform;

[0070] Then put the uniformly mixed material into a screw extruder and extrude at 160-180°C to obtain the product. Wherein, the rotational speed of the extruder is 60 rpm.

[0071] The prepared composite materials were injection molded into standard test specimens in an injection molding machine, and the tensile strength, elongation at break, and Charpy notched impact strength were tested respectivel...

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Abstract

The invention discloses a high-strength and high-toughness fully degradable polylactic acid composite material and a preparation method thereof. Prepared by mixing method. The raw materials for preparation are: 70-90 parts of polylactic acid resin; 10-30 parts of polycarbonate elastomer; 1 part of antioxidant; graphene oxide is 0.1% of the total mass of polylactic acid resin and polycarbonate elastomer ‑1%; put each raw material in an oven, dry for 4‑6 hours at a temperature of 60‑80 ° C, then add it to a high-speed mixer and mix until uniform, and then add the uniformly mixed material to the screw extruder, Extrude at 160-180°C. Compared with the prior art, the present invention has excellent comprehensive performance, short technological process in the production process, easy control, low manufacturing cost, stable quality, simple production equipment and other beneficial effects.

Description

technical field [0001] The invention relates to a composite material and a preparation method thereof, in particular to a high-strength and high-toughness fully degradable polylactic acid composite material and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] Polylactic acid is a non-petroleum-based polymer material synthesized from biologically fermented lactic acid. It has good biodegradability and biocompatibility, and has broad application prospects in biomedicine, environmental protection and daily life. [0003] However, due to the presence of polar ester groups in the polylactic acid molecule, the intermolecular combination is very tight, so the toughness of the material is poor, and the notched impact strength is only 3KJ / m 2 left and right, which greatly limits its application. [0004] Many current research works have carried out toughening modification research on it, mainly using methods such as copolymeriz...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L69/00C08K9/02C08K3/04B29C47/92B29C48/92
Inventor 赵丽芬刘杰秦升学
Owner SHANDONG UNIV OF SCI & TECH
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