Fiber-reinforced multilayer fluorine-containing cross-linking ionic membrane and preparation method thereof
A fluorine-containing cross-linked ion, fiber-reinforced technology, used in fuel cell parts, fuel cells, electrical components, etc., can solve problems such as decreased electrical conductivity and uneven membrane
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0086] Example 1: The repeating unit is
[0087]
[0088] The polymer of EW=1000 is made into 5wt% propanol aqueous solution, is then configured in the 5% peroxidation fluorine-containing malonyl DMF solution, adds silica-modified polytetrafluoroethylene fiber (diameter 1 μ m, length 50 μm, and the weight ratio of the polymer = 2:25), dispersed and cast into a polytetrafluoroethylene mold placed horizontally, after vacuum drying at 80°C for 12 hours, the film was peeled off, and the molar concentration was 0.5M H 2 SO 4 The solution was boiled for 1 hour and washed with deionized water. After heat treatment, the membrane is sequentially treated with NaOH solution and sulfuric acid solution to obtain a fiber-reinforced single-layer fluorine-containing sulfonic acid cross-linked as (I) ion membrane (single-layer membrane 1#). The above two fiber-reinforced single-layer fluorine-containing cross-linked ionic membranes are stacked and hot-pressed to prepare a double-layer fib...
Embodiment 2
[0089] Example 2: The repeating unit is
[0090]
[0091] EW=800 polymer, E-glass fiber (diameter 0.05 μm, length 5 um, mass ratio of E-glass fiber to fluorine-containing sulfonic acid resin is 1:40) was mixed, extruded to obtain a film with a thickness of 30 μm. Soak in NH 4 Cl in DMF for 5 hours. The soaked membrane was then placed in triethylamine at 200°C for 2 hours to obtain a crosslinked membrane. The membrane was sequentially treated with KOH solution and hydrochloric acid solution to obtain an ion-exchange membrane with a cross-linked structure (II) (single-layer membrane 2#).
[0092] Place the above ionic membrane in the repeating unit as
[0093]
[0094] A polymer with EW=1200 and tetraphenyltin was extruded into a 50 μm film with a twin-screw extruder, and then the film was heated to 230° C. for 10 hours to obtain a film with a crosslinked structure (V). The membrane was sequentially treated with LiOH and nitric acid solution to obtain a cross-linked io...
Embodiment 3
[0095] Embodiment 3: the repeating unit is
[0096]
[0097] The polymer with EW=1100 and urea were hot-pressed into a 100 μm membrane, heated at 170° C. for 5 h, and then treated with alkali and acid in sequence to obtain an ionic membrane with a cross-linked structure of type (II). (single layer film 4#)
[0098] Convert the repeating unit to
[0099]
[0100] The polymer of EW=940 is made into 30% DMSO solution, polyfluoropropyl vinyl ether fiber (diameter 0.005 μ m length 0.5um, the mass ratio of polyfluoropropyl vinyl ether fiber and fluorine-containing sulfonic acid resin 0.5:10) dispersed in the above solution. A 10 μm film (monolayer film 5#) was prepared by casting at 170° C. for 60 minutes.
[0101] Stack single-layer membranes 4# and 5# for hot-pressing, and then hot-press with multi-layer membrane 102# to obtain six-layer fiber-reinforced cross-linked ionic membrane (multi-layer membrane 103#).
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More