A kind of superelastic 3D printing nano-cellulose composite material and its preparation method

A nanocellulose, 3D printing technology, applied in the field of 3D printing materials, can solve the problems of high cost, non-compliance with environmental protection and sustainable development, and achieve the effect of cost saving, high elasticity, excellent fatigue resistance and compression performance, and broad application prospects.

Active Publication Date: 2022-06-17
RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is costly and does not meet the requirements of environmental protection and sustainable development

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment provides a method for preparing a superelastic 3D printing nanocellulose composite material. The steps are as follows:

[0030] Step 1) prepare 100 grams of 6wt% microcrystalline nanocellulose solution;

[0031] Step 2) Add TiO to the prepared microcrystalline nanocellulose aqueous solution 2 Nanoparticles are 6 grams, homogenized by a high-speed homogenizer;

[0032] Step 3) It is directly used for 3D printing at room temperature, the printing speed is 2.5mm / s, the material extrusion speed is 1.5mL / h, and the diameter of the nozzle mouth is 0.41mm;

[0033] Step 4) Add a calcium chloride solution with a concentration of 0.5 mol / L to the molded sample dropwise for 5 min. After the sample is taken out, it is freeze-dried in liquid nitrogen and placed in a 40% humidity environment.

[0034] Nanocellulose / TiO prepared by Example 1 2 The nanoparticle composite 3D printing sample was subjected to 24 50% deformation compression tests at a compression rate o...

Embodiment 2

[0036] This embodiment provides a method for preparing a superelastic 3D printing nanocellulose material. The steps are as follows:

[0037] Step 1) dehydrate the nanocellulose aqueous solution prepared by TEMPO oxidation to a concentration of 2.0 wt% by vacuum drying, and take 100 grams;

[0038] Step 2) adding 18 grams of nano-montmorillonite to the dehydrated nano-cellulose aqueous solution, and using a high-speed homogenizer to homogenize;

[0039] Step 3) It is directly used for 3D printing at room temperature, the printing speed is 2.5mm / s, the material extrusion speed is 1.5mL / h, and the diameter of the nozzle mouth is 0.41mm;

[0040] Step 4) Add a calcium chloride solution with a concentration of 0.75 mol / L to the molded sample dropwise for 30 min. After the sample is taken out, it is freeze-dried in liquid nitrogen and placed in a 40% humidity environment.

experiment example 1

[0044] The composite materials in Example 2 and Comparative Example 1 were subjected to a mechanical compression test. When the compression deformation was 50%, 100% of the deformation of the sample of Example 2 was recovered, and the compression deformation of the sample of Comparative Example 1 was close to 40% and could not be recovered. It can be seen that , low concentrations of hygroscopic salts cannot make the material have resilience.

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PUM

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Abstract

The invention relates to a superelastic 3D printing nano-cellulose composite material and a preparation method thereof, comprising the following steps: blending a nano-cellulose aqueous solution with a concentration of 1.5-12 wt% and inorganic nanoparticles, and performing 3D printing after homogenization treatment Molded, printed hydrogel impregnated with hygroscopic salt, freeze-dried and molded, and the product is obtained. The anti-fatigue and highly elastic 3D composite material provided by the invention has broad application prospects in the aspects of substance adsorption, water collection, bioengineering and the like.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a superelastic 3D printing nanocellulose composite material and a preparation method thereof. Background technique [0002] Cellulose is widely found in plants and their processed products, marine organisms and bacteria. Due to its unique small size effect, high specific surface area, high Young's modulus, high mechanical strength, and high biocompatibility, nanocellulose is significantly different from macroscopic objects in physical, chemical, and mechanical properties. Nanocellulose also has a good fluffy three-dimensional network structure, which can promote the mechanical combination of the polymer matrix and the nanocellulose, and enhance the performance of the matrix material. Therefore, the use of nanocellulose as the host material or filler material is in line with the development trend of high-performance green composite materials. [0003] Nanocellulose...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C64/106B29C64/379B29C71/00C08L1/04C08K3/22C08K3/34B33Y10/00B33Y40/20B33Y70/10
CPCB29C64/106B29C64/379B29C71/0009C08K3/22C08K3/346B33Y10/00B33Y40/00B33Y70/00B29C2071/0027C08K2003/2241C08K2201/011C08L1/04
Inventor 陈媛姜峰李改云
Owner RES INST OF FORESTRY NEW TECH CHINESE ACAD OF FORESTRY
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