Cellulose nanofiber/sulfonated polyether sulfone proton exchange membrane and preparation method
A sulfonated polyethersulfone and proton exchange membrane technology, applied in the field of proton exchange membranes, can solve the problems of incomplete filling of the film-forming matrix, unavoidable proton conductivity, weak "transfer barrier layer, etc., to improve water retention, improve Proton conductivity, the effect of low methanol permeability
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0026] A cellulose nanofiber / sulfonated polyethersulfone proton exchange membrane and a preparation method thereof, characterized in that it comprises the following steps:
[0027] S1 uses cellulose acetate as a raw material, and prepares cellulose acetate nanofibers by solution jet spinning, and the fiber diameter distribution is about 50-1100nm;
[0028] S2 is hydrolyzed in sodium hydroxide alcoholic solution to obtain cellulose nanofibers;
[0029] S3 dissolving the sulfonated polyethersulfone particles in the solvent N,N-dimethylformamide (DMF) to prepare a casting solution with a molecular weight of 30000-60000 and a sulfonation degree of 60-80%;
[0030] S4 immersing the cellulose nanofibers into a sulfonated polyethersulfone solution by a solution impregnation method to prepare a cellulose nanofiber / sulfonated polyethersulfone proton exchange membrane.
[0031] The invention uses cellulose acetate as a raw material and adopts a solution jet spinning method to prepare c...
Embodiment 1
[0045] With acetone and N, N-dimethylacetamide (DMAc) as spinning solvent, cellulose acetate was dissolved in the spinning solution to prepare a solution with a mass concentration of cellulose acetate of 17%; The spinning solution is fed into the spinneret liquid reservoir through the metering pump at a speed of / h. When the spinning solution is extruded from the spinneret, a thin stream is formed, and the thin stream passes through the high-pressure drafting airflow (pressure is 0.05MPa). After drafting and refining, it enters the spinning box (box temperature is 25°C), under the joint action of high-pressure airflow and spinning box, the solvent volatilizes to form fibers, and the fibers are collected on the receiving net curtain by the fan (the receiving distance is 40cm), obtain cellulose acetate nanofibers, control the thickness of cellulose acetate nanofibers to be 40 μm;
[0046] The sulfonated polyethersulfone microspheres were dissolved in N,N-dimethylformamide (DMF) ...
Embodiment 2
[0051] Only the quality of the cellulose nanofibers was improved during the impregnation process, and other conditions were completely the same as in Example 1 to obtain a cellulose nanofiber / sulfonated polyethersulfone proton exchange membrane.
[0052] The mass of the cellulose nanofibers is 3% of the mass of the proton exchange membrane to obtain a cellulose nanofiber / sulfonated polyethersulfone proton exchange membrane (SPES / Cell-3) with a thickness of 104 μm.
[0053] The proton exchange membrane is brittle, and the cross-section of the proton exchange membrane is observed with a scanning electron microscope. The observation results are as follows figure 2 shown, according to figure 2 It can be seen that the observation results are similar to Example 1.
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More