Unlock instant, AI-driven research and patent intelligence for your innovation.
Microfiltration membrane and its preparation method and application
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of microfiltration membrane and membrane casting liquid, applied in the field of microfiltration membrane and its preparation, can solve the problems of low membrane pure water flux and high energy consumption equipment, and meet the requirements of high selectivity, improved water flux and energy consumption reduced effect
Active Publication Date: 2022-04-08
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
View PDF7 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, the pore size of the charged nanofiltration membrane is small, and a sufficient pressure (above 0.6MPa) is required to be applied during the operation, and the energy consumption and equipment requirements are very high, and the pure water flux of the membrane is small.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
preparation example Construction
[0061] The preparation method of microfiltration membrane of the present invention, comprises the steps:
[0062] S1, dissolving the polyionic liquid in an organic solvent;
[0063] S2, adding a modifying agent to the above solution for dissolution and then ultrasonically dispersing to obtain a casting solution;
[0064] S3, spreading the casting solution on a polytetrafluoroethylene plate and then drying it;
[0065] S4, soaking the polytetrafluoroethylene plate in step S3 in water, taking it out, and peeling it off to obtain a microfiltration membrane.
[0066] The organic solvent suitable for the preparation method of the present invention is not particularly limited, as long as it can dissolve the polyionic liquid. In one embodiment of the present invention, the organic solvent is N,N-dimethylformamide or dimethylsulfoxide.
[0067] In one embodiment of the present invention, the modifier is polyvinylidene fluoride.
[0068] Further, the mass fraction of polyvinylidene...
Embodiment 1
[0072] The preparation method of microfiltration membrane, comprises the steps:
[0073] S1, dissolving the polyionic liquid in N,N-dimethylformamide;
[0074] S2. Add a modifier polyvinylidene fluoride with a mass fraction of 12% to the above solution for blending, and after fully dissolving, ultrasonically remove air bubbles for 10 minutes to obtain a casting solution;
[0075] S3. After spreading the above-mentioned casting solution on the polytetrafluoroethylene board, evaporate in a blast drying oven at 80° C. for 2 hours;
[0076] S4. After immersing the polytetrafluoroethylene plate in water in step S3 to complete the phase inversion process, take it out and peel it off to obtain a microfiltration membrane.
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Property
Measurement
Unit
pore size
aaaaa
aaaaa
thickness
aaaaa
aaaaa
pore size
aaaaa
aaaaa
Login to View More
Abstract
The invention relates to a microfiltration membrane and its preparation method and application. The microfiltration membrane is a polyionic liquid membrane made of polyionic liquid, and the polyionic liquid membrane has a pore size of 0.1 μm-1 μm and a porosity of 75 %‑85%. Compared with the prior art, the present invention has the following beneficial effects: 1) the microfiltration membrane has higher mechanical properties, solvent resistance and ion exchange capacity; 2) the microfiltration membrane is made of polyionic liquid, possessing The electrical properties can separate amino acid mixtures, with high selectivity and strong applicability; 3) The porous and large pore structure of the microfiltration membrane reduces the pressure and energy consumption requirements and improves the water flux.
Description
technical field [0001] The invention relates to the technical field of filtration membrane materials, more specifically, to a microfiltration membrane and a preparation method thereof, a filter medium including the microfiltration membrane, a filtration device and a method for separating amino acids using the filtration device. Background technique [0002] With the rapid development of the amino acid industry, my country's demand for amino acids is also increasing. At present, the main methods of artificially synthesizing amino acids include protein hydrolysis, microbial fermentation and chemical synthesis. However, most of its products are mixtures of various amino acids, which cannot be used directly. At the same time, the wastewater produced by the amino acid industry also contains a large amount of amino acid mixtures. For example, the wastewater produced by the monosodium glutamate industry contains a large amount of threonine and glutamic acid, and the wastewater pro...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More