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A kind of polylactic acid composition and preparation method thereof for 3D printing

A 3D printing and composition technology, applied in the field of 3D printing materials, can solve the problems of monotonous printing effect and inability to spray dyeing with water-based dyes, and achieve the effect of high mechanical strength

Active Publication Date: 2021-10-29
SHENZHEN 7TH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, PLA, like other FDM printing consumables, can only print monochrome at present, and the printing effect is monotonous; at the same time, because PLA is a hydrophobic material, it cannot be sprayed and colored with water-based dyes under normal circumstances.

Method used

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  • A kind of polylactic acid composition and preparation method thereof for 3D printing
  • A kind of polylactic acid composition and preparation method thereof for 3D printing
  • A kind of polylactic acid composition and preparation method thereof for 3D printing

Examples

Experimental program
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Effect test

Embodiment 1

[0019] A polylactic acid composition for 3D printing, which consists of 45 parts of PLA, 45 parts of PCL, 5 parts of polyurethane material, and 5 parts of nano-scale activated carbon in parts by weight.

[0020] The preparation method of described polylactic acid composition, comprises the steps:

[0021] (1), the preparation of the PCL of double hydroxyl end-capping

[0022] Weigh 25g of PCL into a 500mL two-neck flask, add 250mL of chloroform, heat to 75°C, stir until fully dissolved, add 1,4-butanediol (or ethylene glycol, 1,3- transesterification reagents such as propylene glycol) and 2wt% p-toluenesulfonic acid (also can adopt the saturated fatty acid such as lauric acid, palmitic acid as catalyzer), carry out transesterification reaction, react 8-28 hour; After the reaction finishes, Cool naturally to normal temperature, then pour the solution into a separatory funnel pre-installed with 1L deionized water, filter under reduced pressure to obtain a transparent liquid, th...

Embodiment 2

[0032] A polylactic acid composition for 3D printing, which consists of 50 parts of PLA, 45 parts of PEG particles, 8 parts of polyurethane material, and 5 parts of nano-scale activated carbon in parts by weight.

[0033] The preparation method of described polylactic acid composition, comprises the steps:

[0034] (1), the preparation of the PLA of double hydroxyl end-capping

[0035] Weigh 25g PLA in a 500mL two-necked flask, add 250mL of chloroform, heat to 75°C and stir until fully dissolved, add 5 times the molar number of ethylene glycol (ester exchange reagent) and 2wt% p-toluenesulfonic acid (catalyst ) mixed solution for transesterification reaction, reacted for 8-28 hours; after the reaction was finished, naturally cooled to normal temperature, then poured the solution into a separatory funnel pre-equipped with 1L deionized water, filtered under reduced pressure to obtain a transparent liquid, Then through rotary distillation and vacuum precipitation, the PLA-diol m...

Embodiment 3

[0043] A polylactic acid composition for 3D printing, which consists of 40 parts of PLA, 40 parts of POE, 10 parts of polyurethane material, and 10 parts of nano-scale activated carbon in parts by weight.

[0044] The preparation method of the polylactic acid composition of this embodiment is the same as that of Example 2, the difference is that the hydrophilic material of this embodiment adopts POE, and the preparation of polyurethane material in step (2) is the preparation of POE-PLA intermediate material, POE-PLA HMDI is used as linking agent in the preparation of PLA intermediate material.

[0045] The reaction formula for preparing POE-PLA intermediate material (i.e. PLA-ran-POE) in the present embodiment is as follows:

[0046]

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Abstract

A polylactic acid composition for 3D printing and a preparation method thereof, relating to the technical field of 3D printing materials, in parts by weight, the polylactic acid composition of the present invention includes the following components: 40-50 parts of PLA, hydrophilic 40-50 parts of materials, 5-10 parts of polyurethane materials, and 5-10 parts of nano-scale activated carbon; the polyurethane material is polymerized by double-hydroxyl-terminated PLA, double-hydroxyl-terminated hydrophilic materials and cyanate compounds , or polymerized by double-hydroxyl-terminated PLA and diisocyanate-terminated hydrophilic materials. The raw materials of the polylactic acid composition of the present invention are mixed in proportion and then granulated to obtain a 3D printing material product. The 3D printing material prepared by the invention not only realizes full-color printing that can be sprayed and dyed by using water-based dyes, but also has high mechanical strength and does not produce pungent odor during the printing process.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a polylactic acid composition for 3D printing and a preparation method thereof. Background technique [0002] At present, PLA 3D printing consumables have become one of the most widely used consumables. Its good molding effect, no smell of printing, and high strength of the parts make it popular among many practitioners. On the other hand, PLA, like other FDM printing consumables, can only print monochrome at present, and the printing effect is monotonous; at the same time, because PLA is a hydrophobic material, it cannot be sprayed and colored with water-based dyes under normal circumstances. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a PLA 3D printing consumable with good stability, good usability, and easy use of water-based dyes for spray dyeing and coloring. [0004] In order to achieve the ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L75/06C08L75/08C08L23/08C08L29/04C08K3/04C08G18/42C08G18/48C08G18/62
CPCB33Y70/00C08G18/4277C08G18/428C08G18/4825C08G18/4833C08G18/6204C08G18/6212C08K2201/011C08L23/0815C08L29/04C08L67/04C08L2205/025C08L2205/03C08L75/06C08K3/04C08L71/02C08L75/08
Inventor 宗贵升蔡振宇柯志坚
Owner SHENZHEN 7TH TECH CO LTD
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