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Nanometer cellulose/cellulose compound, enhanced polylactic acid 3D printing material and preparation method of enhanced polylactic acid 3D printing material

A nanocellulose, 3D printing technology, applied in the direction of additive processing, etc., can solve the problems of cumbersome preparation process of nanocellulose, difficult to fully utilize, poor compatibility, etc., to improve compatibility, improve poor compatibility, compatibility good capacitive effect

Active Publication Date: 2019-06-14
广州冠杰环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the disadvantages and deficiencies such as poor compatibility between cellulose and high molecular polymers in the prior art, tedious preparation process of nano-cellulose, and difficulty in making full use of them, the primary purpose of the present invention is to: carry out a series of relatively simple and safe processes on cellulose process to prepare a nanocellulose / cellulose composite that can be used to reinforce polylactic acid 3D printing materials

Method used

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  • Nanometer cellulose/cellulose compound, enhanced polylactic acid 3D printing material and preparation method of enhanced polylactic acid 3D printing material
  • Nanometer cellulose/cellulose compound, enhanced polylactic acid 3D printing material and preparation method of enhanced polylactic acid 3D printing material
  • Nanometer cellulose/cellulose compound, enhanced polylactic acid 3D printing material and preparation method of enhanced polylactic acid 3D printing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A reinforced polylactic acid 3D printing material prepared by the following steps:

[0038] (1) After crushing 2g of cotton cellulose, treat it with 25 ml of 64% sulfuric acid + 25 ml of oleic acid in a constant temperature water bath at 50°C for 2 hours until the solution turns yellow, and dilute with 500 ml of water after stopping the reaction; Finally, take off the mixed solution containing flocculent cellulose for subsequent use;

[0039] (2) Centrifuge the mixed liquid containing flocculent cellulose at a high speed of 8000 r / m for 15 minutes, collect the upper turbid liquid, add water to the flocculent cellulose at the bottom and mix until it becomes turbid, and then centrifuge again, and so many cycles until separation Finally, add water to the flocculent cellulose at the bottom and mix until the turbidity remains unchanged, and combine the obtained turbid liquid to form a stable nano-cellulose sol;

[0040] (3) Pulverize 2g of cotton cellulose and pass through ...

Embodiment 2

[0050] A reinforced polylactic acid 3D printing material prepared by the following steps:

[0051] (1) After crushing 2g of flax cellulose, treat it with 35ml of 64% sulfuric acid in a constant temperature water bath at 45°C for 1 hour until the solution turns slightly yellow, and dilute with 700ml of water after stopping the reaction; Mixed liquid for use;

[0052] (2) Centrifuge the mixed liquid containing flocculent cellulose at a high speed of 8000 r / m for 20 minutes, collect the upper turbid liquid, add water to the flocculent cellulose at the bottom and mix until it becomes turbid, and then centrifuge again, repeating this many times until separation Finally, add water to the flocculent cellulose at the bottom and mix until the turbidity remains unchanged, and combine the obtained turbid liquid to form a stable nano-cellulose sol;

[0053] (3) Grinding 2g of flax cellulose and passing through a 150-mesh sieve to obtain 150-mesh cellulose powder;

[0054] (4) Take 200ml...

Embodiment 3

[0060] A reinforced polylactic acid 3D printing material prepared by the following steps:

[0061] (1) After pulverizing 2g of jute cellulose, treat it with 40ml of 30% hydrochloric acid in a constant temperature water bath at 60°C for 1 hour until the solution turns slightly yellow, and dilute with 600ml of water after stopping the reaction; Mixed liquid for use;

[0062] (2) Centrifuge the mixed liquid containing flocculent cellulose at a high speed of 12000 r / m for 10 minutes, collect the upper layer of turbid liquid, add water to the flocculent cellulose at the bottom and mix until it becomes turbid, and then centrifuge again, repeating this cycle for many times until separation Finally, add water to the flocculent cellulose at the bottom and mix until the turbidity remains unchanged, and combine the obtained turbid liquid to form a stable nano-cellulose sol;

[0063] (3) Pulverize 2g of jute cellulose and pass through a 150-mesh sieve to obtain 150-mesh cellulose powder....

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Abstract

The invention belongs to the field of macromolecular composite materials and 3D printing materials, and specifically relates to a nanometer cellulose / cellulose compound capable of being applied to a polylactic acid 3D printing material and the relevant enhanced 3D printing material. According to the invention, the natural cellulose, acid, a silane coupling agent and polylactic acid are used as rawmaterials to obtain the nanometer cellulose / cellulose compound and the enhanced polylactic acid 3D printing material through a constant temperature water bath reaction and blending extrusion. In a preparation process, the steps of raw material pretreatment, mixing, heating in water bath, drying, blending extrusion, wire drawing and the like are performed; a whole preparation technology is simple;the repeatability is high; compared with pure polylactic acid, the prepared 3D printing material has the advantages that the mechanical property is remarkably improved, and the processing performanceis high; compared with an ordinary natural cellulose enhanced polylactic acid 3D printing material, the enhanced polylactic acid 3D printing material has the advantages that the transparency is high;during printing, end blockage and edge tilting are not prone to occur; and relatively-high application value is realized in the fields of home, decoration, lamps, art, model design and the like.

Description

technical field [0001] The invention belongs to the field of polymer composite materials and 3D printing materials, and specifically relates to a nanocellulose / cellulose composite, a reinforced polylactic acid 3D printing material and a preparation method thereof. Background technique [0002] Cellulose is a multi-purpose biopolymer, which cannot be dissolved in conventional solvents. Only high-concentration zinc chloride aqueous solution, cuproammonia solution, ionic liquid, etc. can destroy the crystal structure of cellulose to dissolve it, and cellulose The structure is complex and there are multiple interactions. Therefore, the research on the synthesis of polymer materials from cellulose-derived monomers still faces many difficulties. Nanomaterials have become the frontier direction of material development due to their special properties such as high specific surface area, high Young's modulus, high mechanical strength and high biocompatibility and nano-size effect. Be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/04C08L1/02C08L67/04C08K5/544C08K5/5435C08K5/5425C08L53/02C08K3/36C08K3/22B33Y70/00C08B15/02
Inventor 董先明周武艺龙海波郑文旭伍菲菲
Owner 广州冠杰环保新材料科技有限公司
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