Biodegradable polylactic acid material for 3D printing and preparation method thereof

A technology of polylactic acid and polycarbonic acid, which is applied in the field of three-dimensional printing materials and its preparation, can solve the problems of low thermal deformation temperature of polylactic acid, low impact strength of polylactic acid, low thermal deformation temperature, etc., and achieve melt strength and heat resistance Improvement, high transparency, good flexibility

Active Publication Date: 2014-08-13
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polylactic acid has the advantages of non-toxicity, no pungent smell, low melting temperature, degradable and pollution-free, small cooling shrinkage, transparent and easy to dye, etc., all of which meet the requirements of 3D printing technology for polymer materials; but the crystallization of polylactic acid The factors of low degree of heat distortion, low impact strength, and poor toughness of polylactic acid caused by factors such as low degree of heat distortion, low energy of ester bonds in molecular chains, and easy breakage lead to great restrictions on the application range of products printed from polylactic acid. limit
[0005] Chinese Patent Publication No. CN103146164A discloses a polylactic acid material for rapid prototyping nanomaterial toughening and a preparation...

Method used

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  • Biodegradable polylactic acid material for 3D printing and preparation method thereof
  • Biodegradable polylactic acid material for 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Based on the parts by weight of polylactic acid after drying. 800 grams of dried polylactic acid (Natureworks2002D), 160 grams of polybutylene carbonate (PBC), 20 grams of polypropylene adipate, 3 grams of composite antioxidant, 3 grams of stearic acid and 20 grams of talcum powder were pre-mixed in a high-speed mixer for 30 minutes; after fully mixing, add 0.1 gram of dicumyl peroxide (DCP) and 1 gram of triallyl isocyanurate and continue mixing for 5 minutes. The mixed material is obtained; the mixed material is added to a twin-screw extruder with a length-to-diameter ratio of 40:1, melted and blended at a temperature of 150-190 ° C, and stretched into strips and cut by air cooling Particles; the obtained granular mixed resin slices are vacuum-dried to remove water to obtain a modified biodegradable polylactic acid composite material (moisture content <0.6% by weight).

[0056] The modified biodegradable polylactic acid composite material obtained above was fed into ...

Embodiment 2

[0058] Based on the parts by weight of polylactic acid after drying. Dry polylactic acid (Natureworks4032D) 670 grams, polybutylene carbonate (PBC) 150 grams, polyhexamethylene carbonate (PHC) 100 grams, polysuccinic acid 1,2-propylene glycol 30 grams, triphenyl phosphite 3 grams of ester, 3 grams of calcium stearate and 50 grams of silicon dioxide were premixed in a high-speed mixer for 30 minutes; after mixing well, 1 gram of dicumyl peroxide (DCP) and triallyl After 0.5 g of isocyanurate, continue mixing for 5 minutes to obtain a mixed material; add the mixed material to a twin-screw extruder with a length-to-diameter ratio of 40:1, and carry out the process at a temperature of 150-190 ° C. Melt blending, stretching into strips and pelletizing by air cooling; vacuum drying and dewatering treatment of the obtained granular mixed resin slices to obtain biodegradable materials containing aliphatic polycarbonate (moisture content<0.6% by weight %).

[0059] The modified biode...

Embodiment 3

[0061] Based on the parts by weight of polylactic acid after drying. 640 grams of dried polylactic acid (Natureworks4032D), 140 grams of poly(1,2-propylene carbonate) (PPC), 20 grams of poly(1,2-propylene adipate), 3 grams of composite antioxidant, phosphorous acid 3 grams of trimethyl ester and 200 grams of talcum powder were premixed in a high-speed mixer for 30 minutes; DHBP) 1 gram, triallyl isocyanurate 1 gram and continue mixing for 5 minutes to obtain a mixed material; the mixed material is added to a twin-screw extruder with a length-to-diameter ratio of 40:1, Melt blending at a temperature of 150-190°C, air-cooled, stretched into strips, and pelletized; the obtained granular mixed resin slices are vacuum-dried to remove water to obtain a modified biodegradable polylactic acid compound Material (moisture content <0.6% by weight).

[0062] The modified biodegradable polylactic acid composite material obtained above was fed into a single-screw extruder with an aspect r...

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Abstract

The invention relates to a biodegradable polylactic acid material for 3D printing and a preparation method and an application thereof. The material provided by the invention contains, by weight, 50-90 parts of polylactic acid, 10-50 parts of aliphatic polycarbonate, 0.01-1 part of organic peroxide, 0.05-1 part of a cross-linking agent, 1-50 parts of a reinforcing agent, 0.3-5 parts of a compatilizer, 0.1-5 parts of a heat stabilizer and 0.1-1 part of an antioxidant. The biodegradable polylactic acid material provided by the invention can be used in a 3D printing technology. The material meets operating requirements of 3D printing, has various excellent properties of plastic, can remain good transparency, has high impact strength, can provide high toughness and thermal deformation strength, has good thermal stability and processing stability, and has low cost.

Description

technical field [0001] The invention relates to a three-dimensional printing material and a preparation method thereof, in particular to a biodegradable polylactic acid material and a preparation method thereof. Background technique [0002] Three-dimensional (3D) printing technology, also known as additive manufacturing technology, is actually an emerging technology in the field of rapid prototyping. It is based on digital model files and uses bondable materials such as powdered metal or plastic. The technology of constructing objects by layer printing. The basic principle is additive manufacturing, the technique of adding material layer by layer to generate a three-dimensional solid. At present, 3D printing technology is mainly used in product prototyping, mold manufacturing, art creation, jewelry making and other fields, replacing these traditional fine processing techniques. In addition, 3D printing technology is gradually being applied in medicine, bioengineering, arc...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L69/00C08L67/02C08K13/02C08K5/14C08K5/09C08K3/34C08K5/3492C08K5/526C08K5/098C08K3/36C08K5/524C08K3/26B29C47/92B29C48/92
CPCB29C2947/92619B29B7/72B29B7/46B29B9/06B29C47/92B29B7/7461B29C47/0014B29C47/6087B29B7/40B29B2009/125B29B9/12B29C48/05B29C48/40B29C48/625B29C48/92B29C2948/92619B29C2948/92704
Inventor 肖耀南李春成郑柳春朱文祥管国虎符文鑫林学春马永梅孙文华徐坚董金勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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