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Ink treatment method for digital inkjet printing

A technology of digital inkjet and treatment method, which is applied in water/sewage treatment, textile industry wastewater treatment, water/sewage multi-stage treatment, etc. It is not easy to be polluted, has excellent mechanical properties, and has good solvent resistance.

Active Publication Date: 2019-08-02
浙江海印数码科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used membrane materials in the desalination process of inkjet ink are cellulose acetate series membranes, PA membranes, etc. Although this series of membranes can effectively remove the salt in inkjet inks, the membranes are easily polluted and have a short service life. and poor mechanical properties

Method used

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  • Ink treatment method for digital inkjet printing

Examples

Experimental program
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Effect test

specific Embodiment 1

[0042]S1: Ethyl tetrasilicate was dissolved in absolute ethanol, and dopamine hydrochloride and sodium citrate were dissolved in deionized water to prepare a mixed solution. Among them, the mass ratio of ethyl orthosilicate, dopamine hydrochloride and sodium citrate is 3:0.22:0.01. Add the mixed solution dropwise to the tetraethyl orthosilicate solution and stir at room temperature for 60 min, then add 0.1 mol / L hydrochloric acid solution, and then stir to prepare polydopamine-modified silica sol.

[0043] S2: adding the polydopamine-modified silica sol prepared in step S1 into a polyacrylonitrile-dimethylformamide solution, stirring and mixing to obtain a membrane liquid. DMF solution of polyethylene glycol was used as core fluid. The core liquid and the membrane liquid are respectively added into the core liquid channel and the membrane liquid channel of the dual-channel spinneret of the spinning machine, and the coagulation bath adopts deionized water to prepare the hollow...

specific Embodiment 2

[0048] S1: Ethyl tetrasilicate was dissolved in absolute ethanol, and dopamine hydrochloride and sodium citrate were dissolved in deionized water to prepare a mixed solution. Among them, the mass ratio of ethyl orthosilicate, dopamine hydrochloride and sodium citrate is 3:0.45:0.01. Add the mixed solution dropwise into the tetraethyl orthosilicate solution and stir at room temperature for 120 min, then add 0.1 mol / L hydrochloric acid solution, and then stir to prepare polydopamine-modified silica sol.

[0049] S2: adding the polydopamine-modified silica sol prepared in step S1 into a polyacrylonitrile-dimethylformamide solution, stirring and mixing to obtain a membrane solution. DMF solution of polyethylene glycol was used as core fluid. The core liquid and the membrane liquid are respectively added into the core liquid channel and the membrane liquid channel of the dual-channel spinneret of the spinning machine, and the coagulation bath adopts deionized water to prepare the ...

specific Embodiment 3

[0054] S1: Ethyl tetrasilicate was dissolved in absolute ethanol, and dopamine hydrochloride and sodium citrate were dissolved in deionized water to prepare a mixed solution. Among them, the mass ratio of ethyl orthosilicate, dopamine hydrochloride and sodium citrate is 3:0.25:0.01. Add the mixed solution dropwise to the tetraethyl orthosilicate solution and stir at room temperature for 70 minutes, then add 0.1 mol / L hydrochloric acid solution, and then stir to prepare polydopamine-modified silica sol.

[0055] S2: adding the polydopamine-modified silica sol prepared in step S1 into a polyacrylonitrile-dimethylformamide solution, stirring and mixing to obtain a membrane liquid. DMF solution of polyethylene glycol was used as core fluid. The core liquid and the membrane liquid are respectively added into the core liquid channel and the membrane liquid channel of the dual-channel spinneret of the spinning machine, and the coagulation bath adopts deionized water to prepare the h...

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Abstract

The invention discloses an ink treatment method for digital inkjet printing. The ink treatment method comprises the following steps: firstly, preparing polydopamine-modified silica sol, adding the polydopamine-modified silica sol into a dimethylformamide solution of polyacrylonitrile, and stirring and mixing to obtain a membrane solution; adopting a DMF solution of polyethylene glycol as a core solution to obtain a hollow membrane; taking acrylamide and polyimide as polymerized monomers and polymerizing on the surface of the hollow membrane to obtain a composite nanofiltration membrane; firstly, carrying out activated carbon adsorption treatment on inkjet ink; then treating the inkjet ink by a microfilter penetration processor; subsequently, putting penetrating fluid into a nano permeatorfilled with the composite nanofiltration membrane for carrying out desalting treatment. The ink treatment method for digital inkjet printing, provided by the invention, has the beneficial effects thatthe salinity in the inkjet ink can be effectively removed, and energy consumption is low; in addition, a membrane material adopted in the desalting technology has stable membrane flux, good solvent resistance, excellent mechanical properties and low possibility of being polluted.

Description

technical field [0001] The invention relates to the field of dye preparation, in particular to an ink treatment method for digital inkjet printing. Background technique [0002] As a new technology combining digital information technology and textile printing, digital printing has become the mainstream direction of industrial upgrading and technological innovation in the textile industry due to its advantages such as short production cycle, rich colors, energy saving and environmental protection. Inkjet ink preparation is the core technology in the application of digital printing. Due to the monopoly of foreign countries on ink technology, there are few domestic high-quality inks. The higher ink cost hinders the popularization of digital printing, and textile printing and dyeing enterprises cannot apply it on a large scale. Localization of ink preparation technology is an effective way to reduce the cost of industrial digital printing. However, there are a large amount of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02B01D69/12B01D61/00C02F103/30
CPCC02F1/442C02F1/283C02F1/444B01D69/12B01D61/027C02F2103/30
Inventor 宋水友
Owner 浙江海印数码科技有限公司
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