Crab shell powder chemical treatment method, enhanced polylactic acid 3D printing material and preparation method thereof

A chemical processing and 3D printing technology, applied in the direction of additive processing, can solve the problems of single color and poor mechanical properties, and achieve the effect of excellent mechanical properties, good printing performance, and increased added value.

Inactive Publication Date: 2020-01-17
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to recycle waste crab shells more efficiently, reduce its pollution to the environment, and at the same time solve the problems of poor mechanical properties and single color of polylactic acid 3D printing materials, the primary purpose of this invention is to provide a method for chemically treating crab shell powder. Through a series of simple and effective treatment of discarded crab shells, crab shell powder with different colors and unique properties can be obtained, so as to achieve the purpose of efficient recycling of discarded crab shells

Method used

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  • Crab shell powder chemical treatment method, enhanced polylactic acid 3D printing material and preparation method thereof
  • Crab shell powder chemical treatment method, enhanced polylactic acid 3D printing material and preparation method thereof
  • Crab shell powder chemical treatment method, enhanced polylactic acid 3D printing material and preparation method thereof

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Effect test

Embodiment 1

[0040] A preparation method with an orange-red appearance reinforced polylactic acid 3D printing composite material, comprising the following steps:

[0041] (1) Wash the discarded portunus crab shells with water to remove the soil and other impurities on the crab shells; then crush and sieve through a high-speed pulverizer to obtain 250-mesh brown crab shell powder;

[0042](2) Soak the crab shell powder obtained in step (1) in a container filled with 4% hydrochloric acid, the mass volume ratio of crab shell powder to hydrochloric acid is 1:10, soaking time is 10 h, then filter and wash to medium properties, dried at 100°C for 20 h to obtain orange-red crab shell powder;

[0043] (3) Mix 5% of the orange-red crab shell powder obtained in step (2) with 90% of polylactic acid, 2% of SEBS, and 3% of lubricant zinc stearate through a high-speed mixer to obtain a blend that is dried at 85°C for 5 h standby;

[0044] (4) Melt and extrude the obtained blend through a twin-screw ex...

Embodiment 2

[0049] A method for preparing a reinforced polylactic acid 3D printing composite material with a light red appearance, comprising the following steps:

[0050] (1) Wash the discarded Portunus crab shells with water to remove the soil and other impurities on the crab shells, and then crush and sieve at high speed to obtain 300-mesh brown crab shell powder;

[0051] (2) Soak the crab shell powder obtained in step (1) in a container filled with 6% phosphoric acid, the mass volume ratio of crab shell powder to dilute acid is 1:8, the soaking time is 12 h, then filter and wash until Neutral, dried at 100°C for 20 h to obtain orange-red crab shell powder;

[0052] (3) Add the orange-red crab shell powder obtained in step (2) into a container containing 6% potassium hydroxide solution, the mass volume ratio of crab shell powder and alkali solution is 1:5, stir at 30°C for 20h, 30 Stir at ℃ for 20h, then filter, wash until neutral, and dry at 100℃ for 12h to obtain light red crab she...

Embodiment 3

[0056] A preparation method with light yellow appearance reinforced polylactic acid 3D printing composite material, comprising the following steps:

[0057] (1) Wash the discarded portunus crab shells with water to remove the soil and other impurities on the crab shells, and then crush and sieve at high speed to obtain 200-mesh brown crab shell powder;

[0058] (2) Soak the crab shell powder obtained in step (1) in a container filled with 6% acetic acid, the mass volume ratio of crab shell powder to dilute acid is 1:10, the soaking time is 10h, then filter and wash to medium properties, and dried at 100°C for 20 h to obtain orange-red crab shell powder; for scanning electron microscopy, see figure 2 , it can be seen that the hollow structure of the crab shell powder is more obvious, and the contact area between the crab shell powder and the matrix polylactic acid is larger, thereby further improving the mechanical properties of the material;

[0059] (3) Add the orange-red c...

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Abstract

The invention belongs to the fields of solid waste treatment and fused deposition modeling 3D printing technologies and particularly relates to a crab shell powder chemical treatment method. Accordingto the method, surfaces of crab shells are cleaned, the crab shells are smashed to obtain brown crab shell powder, the crab shell powder is soaked in a container containing a dilute acid solution, the solution is filtered, washed and dried to obtain orange crab shell powder, multiple steps can be sequentially performed subsequently to obtain light-red crab shell powder, light-yellow crab shell powder and milk-white crab shell powder respectively, and the chemically treated crab shell powder is mixed with polylactic acid, a flexibilizer and a lubricant for 3D printing. Through the method, waste crab shells are chemically treated, then a polylactic acid 3D printing material is prepared, the preparation process is simple, added value of crabs is increased, environmental pollution is relieved, and the prepared polylactic acid 3D printing material not only has good mechanical properties and printing properties but also is environment-friendly and unique in color.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and fused deposition modeling 3D printing, and specifically relates to a method for chemically treating crab shell powder, a reinforced polylactic acid 3D printing material and a preparation method thereof. Background technique [0002] In recent years, as the output of crabs in our country has increased year by year, how to effectively use the discarded crab shells produced in the processing process, reduce environmental pollution, and increase the added value of products is of great significance to the development of the crab industry. Crab shells are rich in active ingredients such as chitin, protein, pigments, and inorganic salts. How to effectively extract and rationally utilize them has always been a research hotspot, especially the extraction of chitin from discarded crab shells has attracted widespread attention. At present, the extraction of chitin from discarded crab shells...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08C08L67/04C08L5/08C08K5/098C08L53/02C08L75/04B33Y70/00B29B9/06B29C48/05
CPCB29B9/06B29C48/05B33Y70/00C08B37/003C08L67/04C08L2205/03C08L5/08C08L53/025C08K5/098C08L53/02C08L75/04
Inventor 董先明杨飞文李华柳陈锡辉龙海波周武艺罗颖
Owner SOUTH CHINA AGRI UNIV
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