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Cellulose/nano inorganic filler composite gel ink for 3D printing and preparation method of cellulose/nano inorganic filler composite gel ink

A nano-inorganic filler and composite gel technology, applied in the field of preparation of 3D printing gel ink, can solve the problems of environmental protection hazards, high energy consumption, strict requirements for printing ink forming conditions, etc., and achieve good biocompatibility, The effect of a wide range of sources and low cost of raw materials

Pending Publication Date: 2021-05-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires high-temperature treatment under the protection of inert gas from printing ink to forming components. The high-temperature treatment temperature is 550°C-1000°C, and the processing time is 30min-100min. The forming conditions of the printing ink are demanding and consume a lot of energy. , and a large amount of strong acid, strong oxidizing reagents, concentrated sulfuric acid, nitric acid, potassium permanganate, etc. are used in the ink preparation process, and the ink preparation process has certain hazards to environmental protection

Method used

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  • Cellulose/nano inorganic filler composite gel ink for 3D printing and preparation method of cellulose/nano inorganic filler composite gel ink
  • Cellulose/nano inorganic filler composite gel ink for 3D printing and preparation method of cellulose/nano inorganic filler composite gel ink
  • Cellulose/nano inorganic filler composite gel ink for 3D printing and preparation method of cellulose/nano inorganic filler composite gel ink

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Experimental program
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Effect test

Embodiment

[0031] The 3D printing cellulose / nano-inorganic filler composite gel ink provided by the present invention is a cellulose-based composite gel aqueous solution with nano-inorganic materials as fillers and cellulose as a polymer matrix. According to the ratio of parts by mass, It is made of 15-20 parts of nano-inorganic filler dispersion, 90-100 parts of cellulose dispersion, and 1-2 parts of chemical crosslinking agent; the addition amount of nano-inorganic filler in the nano-inorganic filler dispersion is 1-30 wt%, The added amount of fiber in the cellulose dispersion is 4-6 wt%.

[0032] The nano-inorganic filler is one of graphene oxide nanosheets, clay nanosheets, and carbon nanotubes; the cellulose raw material is cotton linters; the chemical crosslinking agent is epichlorohydrin; the ink is When the preparation is completed, it is partially cross-linked; when in use, the ink is soaked in deionized water at 50°C-100°C, and fully cross-linked by thermal induction, then it c...

specific Embodiment 1

[0044] See attached Figure 1~2 , the 3D printing cellulose / nano-inorganic filler composite gel ink provided in this example uses hydroxylated graphene oxide as the nano-inorganic filler.

[0045] A kind of preparation method of the cellulose / graphene composite gel ink that is used for 3D printing nano composite material, it comprises the following steps:

[0046] (1) Add a quantitative amount of hydroxylated graphene oxide into deionized water, and ultrasonically disperse to obtain a uniformly dispersed graphene oxide dispersion; for the graphene oxide ultrasonic dispersion process, the ultrasonic power is 20W-80W, and the ultrasonic time is 1h-12h ;

[0047] (2) Take a quantitative amount of cotton linter raw material, add alkali / urea solution pre-cooled to a specified temperature, and stir rapidly to obtain a cellulose dispersion; add the graphene oxide dispersion obtained in the above step (1) to the fiber In the plain dispersion, stir vigorously to obtain a mixed disper...

specific Embodiment 2

[0062] The preparation method of the cellulose / graphene composite gel ink for 3D printing nanocomposite provided by the embodiment of the present invention comprises the following steps:

[0063] (1) Add 1.0 g of graphene oxide powder into 19.0 g of deionized water, and ultrasonicate for 30 min at a power of 80 W to obtain a graphene oxide dispersion;

[0064] (2) Weigh 4.5g of dried cotton linter raw material, add it into 75.5g of 7wt%NaOH / 20wt%urea solution precooled to -10°C, and stir rapidly for 5min to obtain a cellulose dispersion;

[0065] (3) the graphene oxide dispersion liquid and the cellulose dispersion liquid that above-mentioned step (1) and step (2) obtain are mixed, under ice-bath condition, carry out mechanical stirring with the rotating speed of 1000r / min;

[0066] (4) Under the stirring condition of the above step (3), slowly add 1 mL of the chemical crosslinking agent epichlorohydrin, and the stirring time in the ice bath is 30 min;

[0067] (5) Take the c...

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Abstract

The invention discloses a 3D printing cellulose / nano inorganic filler composite gel ink, which is characterized in that the ink is a cellulose-based composite gel aqueous solution with a nano inorganic material as a filler and cellulose as a polymer matrix, and the ink is prepared from the following raw materials in parts by mass: 15-20 parts of nano inorganic filler dispersion liquid, 90-100 parts of cellulose dispersion liquid and 1-2 parts of chemical cross-linking agent, the addition amount of the nano inorganic filler in the nano inorganic filler dispersion liquid is 0.5-30 wt%, and the addition amount of the fiber in the cellulose dispersion liquid is 4-6 wt%. The invention also discloses a preparation method of the composite gel ink. The cellulose is used as the polymer matrix of the 3D printing ink, the preparation method is efficient, the prepared gel ink has good biocompatibility, mechanical properties and environmental friendliness, and the polymer matrix is wide in source and low in raw material cost and can be used for printing preparation of polymer reinforced composite materials in the fields of electronic devices, electronic packaging and other fields.

Description

technical field [0001] The invention relates to a preparation method of 3D printing gel ink, in particular to a 3D printing cellulose / graphene oxide composite gel ink and a preparation method thereof. Background technique [0002] 3D printing is a technology that prints three-dimensional objects by slicing and reconstructing the restoration trajectory. Generally, the digital model is restored by the principle of printing ink following the accumulation of the trajectory, which has the advantages of unique design freedom and short preparation cycle. In recent years, 3D printing molding technology has been introduced to the field of polymer composite materials to enhance various properties of composite materials, such as mechanical properties, electrical conductivity, electromagnetic shielding properties, thermal conductivity, etc. [0003] At present, the matrix materials of common 3D printing reinforced composite inks are common thermoplastics (such as polyurethane, polypropy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08K3/04C08K5/1515C08K3/34C08K7/00C08J3/075C08J3/24B33Y70/10
CPCC08J3/075C08J3/244B33Y70/10C08J2301/02C08K3/042C08K5/1515C08K3/346C08K3/041C08K7/00
Inventor 宋娜王培丁鹏
Owner SHANGHAI UNIV
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