A gradient hydrophilic-hydrophobic carbon paper and a preparation method thereof
By constructing a gradient of hydrophilicity and hydrophobicity along the thickness direction of carbon paper and modifying it with nano-silica and silane, the problem of insufficient drainage capacity of carbon paper was solved, the drainage and gas transmission performance of fuel cells was improved, and the flooding problem was avoided.
CN119434018BActive Publication Date: 2026-03-27SHANGHAI JIAOTONG UNIV
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2026-03-27
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Figure CN119434018B_ABST
Abstract
The present application relates to a kind of gradient hydrophilic-hydrophobic carbon paper and its preparation method, comprising the following steps: (1) after pretreatment, carbon paper is dipped in nanometer silicon dioxide dispersion, takes out, dry, carries out heat treatment, obtains the carbon paper after hydrophilic treatment;(2) in the carbon paper after hydrophilic treatment one side surface, spray hydrophobic modified silane dispersion, after drying, heat treatment is carried out, i.e. in the thickness direction, carbon paper with gradient hydrophilic-hydrophobic property is obtained.Compared with prior art, the present application realizes the gradient of hydrophilic-hydrophobic property in the thickness direction of carbon paper, effectively improves the drainage, gas transmission performance of carbon paper, and process is simple, low cost.
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Citation Information
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