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Method for preparing organic separating membrane through three-dimensional molding technology

A technology for three-dimensional molding and separation of membranes, applied in the direction of additive processing, etc., to achieve the effects of increased flexibility, fast curing speed, and optimized preparation conditions

Inactive Publication Date: 2016-06-08
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the retrieved literature and patents, there is no report on the preparation of planar or three-dimensional separation membranes by using jet photocuring 3D printing technology. However, the preparation of separation membranes by this method has the advantages of digitalization, rapidity, greenness, controllability, and uniformity. big market prospect

Method used

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  • Method for preparing organic separating membrane through three-dimensional molding technology
  • Method for preparing organic separating membrane through three-dimensional molding technology
  • Method for preparing organic separating membrane through three-dimensional molding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing a separation membrane without protrusions and a substrate structure on the surface (see figure 2 ), using light-curing 3D printing technology to prepare an organic film with a total thickness of 0.15mm:

[0035] (1) According to the special surface structure of the separation membrane, use AutoCAD software to establish a three-dimensional digital model of the separation membrane product with 3D without protrusions, the length and width are 150 mm, and the output is an STL file for controlling the 3D printer;

[0036] (2) The composition of the light-curing material is as follows:

[0037] effect

ingredients

mass percentage

prepolymer

Acrylic Monomer

<30

prepolymer

Acrylate Oligomer

<15

Thinner

2-Acrylic acid, 1,7,7-trimethylbicyclo[2.2.1]hept-2-yl methacrylate

<25

Photoinitiator

Diphenoxybenzophenone

<2

[0038] The above-mentioned photocurable materials were mixed, ...

Embodiment 2

[0042] A method for preparing a separation membrane with protrusions on the surface and without a substrate structure, using photo-curing 3D printing technology to prepare an organic membrane with a total thickness of 0.4mm:

[0043] (1) According to the special surface structure of the separation membrane, use AutoCAD software to establish a three-dimensional digital model of the separation membrane product with 3D protrusions. The protrusions are frustum pyramid structures, the diameter of the pyramid bottom is 0.5mm, and the diameter of the upper surface is 0.3mm. , the height is 0.1mm, and the distance between the two pyramids is 1.5mm. They are evenly and orderly distributed on the surface of the membrane, and the output is an STL file for controlling the 3D printer; the protrusion structure on the surface of the separation membrane can be designed into different shapes (rhomboid, half circular, spiral) and different arrangements (staggered, diagonal, spaced) (see image ...

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Abstract

The invention relates to a method for preparing a membrane through a three-dimensional molding technology, in particular to a method for preparing an organic separating membrane through the three-dimensional molding technology. The method comprises the steps that firstly, a three-dimensional separating membrane model is prepared through three-dimensional cartographic software and then is converted into a format capable of being recognized by a 3D printer; secondly, photocuring material systems of the organic separating membrane are mixed and subjected to filtering and degassing; processed photocuring material liquid is injected to a cavity of the 3D printer, the separating membrane is printed in a spraying layer-by-layer mode, and the separating membrane is formed by combination with a light source polymerization curing reaction; and finally the separating membrane is obtained. The obtained organic separating membrane can be applied to the industries such as environmental protection, chemical engineering, separation and pharmacy. The organic separating membrane is prepared by means of the spraying type photocuring 3D printing for the first time, the preparation method and design structure are novel, the shape, thickness and surface structure of the separating membrane can be accurately controlled, the uniformity and selection separability of the separating membrane are improved, the production efficiency of the preparation process is improved, and compared with a traditional organic separating membrane, the spraying type photocuring 3D printing membrane has the characteristics of being high in curing rate and low in volume shrinkage rate.

Description

technical field [0001] The invention relates to a method for preparing a membrane by using a three-dimensional forming technology, in particular to a method for preparing an organic separation membrane by using a three-dimensional forming technology. Background technique [0002] Membrane preparation and application began in the 1960s. After fifty years of development, the membrane separation process has been gradually applied in advanced sewage treatment, seawater desalination, resource recovery, material separation and other fields, and has become a core technology in some of these fields. However, the application of membrane technology is largely restricted by the selective separation of membranes, and high-selectivity separation membranes have always been a hot and difficult point in the research of membrane preparation. The separability of the selective membrane is not only related to the film-forming material, but also closely related to the film structure, film-formi...

Claims

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Application Information

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IPC IPC(8): B29C67/00B33Y10/00B33Y70/00B33Y80/00
Inventor 张杨刘磊史元腾何思远
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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