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3D printing ink of silicon dioxide aerogel fibers, and 3D printing preparation method

An airgel fiber, 3D printing technology, applied in the direction of fiber chemical characteristics, ink, textile and paper making, to achieve the effect of good continuity, rapid prototyping and good fluidity

Active Publication Date: 2020-04-14
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a 3D printing ink of silica airgel fiber and its 3D printing preparation method, which can realize the self-supporting of the one-dimensional shape of airgel fiber to overcome the deficiencies in the existing 3D printing technology

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  • 3D printing ink of silicon dioxide aerogel fibers, and 3D printing preparation method
  • 3D printing ink of silicon dioxide aerogel fibers, and 3D printing preparation method
  • 3D printing ink of silicon dioxide aerogel fibers, and 3D printing preparation method

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preparation example Construction

[0043]Another aspect of the embodiments of the present invention provides a method for preparing the 3D printing ink of the aforementioned silica airgel fiber, which includes: uniformly mixing a linear organosiloxane polymer with a multifunctional group and a solvent to prepare The 3D printing ink of the silica airgel fiber.

[0044] Further, the preparation method includes:

[0045] (1) Design and synthesis of linear organosiloxane polymers with multifunctional groups;

[0046] (2) The linear organosiloxane polymer with multifunctional groups is mixed with a solvent to form a 3D printing ink.

[0047] As one of the preferred schemes, the use of the 3D printing ink of the silica airgel fiber specifically includes:

[0048] 1) The number average molecular weight of the 3D printing ink is 800-5000, which can meet the needs of 3D printing rapid prototyping;

[0049] 2) The 3D printing ink can realize the shape self-support and size and shape design of a single silica airgel fi...

Embodiment 1

[0084] (1) Preparation of 3D printing ink: Using PMDS and TEOS as monomers at a molar ratio of 1:1, polycondensate in THF to prepare a multifunctional group linear organosiloxane with a number average molecular weight of 800. The polymer chain contains 5 ethoxy groups, 8 siloxane groups and 3 silanol groups; and then dispersing the obtained polymer in an ethanol solution to prepare a 3D printing ink with a mass fraction of an organosiloxane polymer of 40%;

[0085] (2) 3D printing silica airgel fiber: fill the 3D printing ink into the printing equipment; prepare NaOH aqueous solution with a mass fraction of 0.1%, the diameter of the printing nozzle is 300 μm, and the temperature difference between the printing nozzle and the coagulation bath is 10 ℃, the solvent concentration difference between the printing ink and the alkaline coagulation bath is 80%, the extrusion method is continuous extrusion driven by air pressure, the extrusion speed is 10μl / min, and the printing speed is...

Embodiment 2

[0088] (1) Preparation of 3D printing ink: Using PMDS and TEOS as monomers with a molar ratio of 2:1, polycondensate in DMF to prepare a multifunctional group linear organosiloxane with a number average molecular weight of 5000. After testing, the polymer chain contains 16 ethoxy groups, 18 siloxane groups and 11 silanol groups; and then dispersing the obtained polymer in an ethanol solution to prepare a 3D printing ink with a mass fraction of an organosiloxane polymer of 1%;

[0089] (2) 3D printing silica airgel fiber: fill the 3D printing ink into the printing equipment; prepare an aqueous solution of KOH with a mass fraction of 3%, the diameter of the printing nozzle is 300 μm, and the temperature difference between the printing nozzle and the coagulation bath is 50 ℃, the solvent concentration difference between the printing ink and the alkaline coagulation bath is 75%, the extrusion method is continuous extrusion driven by a screw piston, the extrusion speed is 150μl / min,...

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Abstract

The invention discloses 3D printing ink of silicon dioxide aerogel fibers, and a 3D printing preparation method. The 3D printing ink comprises a linear organosiloxane polymer having a multifunctionalgroup and used as a main active ingredient, and a solvent, wherein the linear organosiloxane polymer having the multifunctional group is obtained by carrying out a condensation polymerization reactionon monomers such as TEOS, TMOS, PMDS, DMDMS and the like. The 3D printing preparation method comprises: loading 3D printing ink into 3D printing equipment, carrying out 3D printing in a coagulating bath through a spray head extrusion 3D printing method to obtain silica gel fibers, and carrying out drying treatment to obtain the silica aerogel fibers. According to the invention, the 3D printing ink is good in stability, good in formability and good in continuity, and has huge prospect in the fields of size and morphology design of silicon dioxide aerogel fibers, irregular aerogel preparation based on silicon dioxide aerogel fibers and the like.

Description

technical field [0001] The invention designs a novel 3D printing ink, in particular relates to a 3D printing ink of silica airgel fiber, its 3D printing preparation method and application, and belongs to the field of 3D printing, the field of nanoporous materials and the technical field of functional fibers. Background technique [0002] The airgel material is a material obtained by replacing the liquid component in the gel with gas while keeping the gel network from collapsing. Airgel was first born in the 1830s and was invented by chemist Sterven.S.Kistler of California Pacific University. It used supercritical drying technology for the first time to replace the liquid component in the wet gel with gas and keep the gel The skeleton structure is complete, thus the aerogel is obtained. Airgel has a very low apparent density (0.003~0.3g / cm 3 ), large specific surface area (100~2400m 2 / g), high porosity (80-99.8%) and low thermal conductivity [10-40mW / (m·K)]. There are th...

Claims

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Application Information

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IPC IPC(8): C09D11/102D01F9/10
CPCC09D11/102D01F9/10
Inventor 张学同杜煜王锦
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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