聚氨酯用于界面调控以实现碳纸 韧性的提升

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·碳纸韧性提升·作者简介：赵双双，在读博士研究生；主要从事纤维复合材料界面性能与强韧化等方面的研究。

关键词：碳纸；聚氨酯；韧性；界面调控

中图分类号：TS761.2；TB332 文献标识码：A DOI：10.11980/j.issn.0254-508X.2025.08.006

Use of Polyurethane for Interface Control to Improve the Toughness of Carbon Paper

ZHAO Shuangshuang'MENG Ling2，3 * LI Hailong1，* CHEN Dong1 （1.SchlofLightIdustryieneandEngneeingouthCinaUiesityfecolguangouuangdogProine; 2.StateKeyLbofPulp&PaperEnginering，SouthChinaUniversityofTechnology，Guangzhou，GuangdongProvince; 3.School ofChemistryand Chemical Engineering，Guangzhou University，Guangzhou，Guangdong Province，510006） （ * E-mail：mengling@gzhu.edu.cn； felhl@scut.edu.cn）

Abstract：Inordertoimprovethetoughnessofcarbonpaper（CP），thisstudyemployedthermoplasticpolyurethanes（TPU）toconstruct multi-layerinterfacsduringteCPodingprocess toreducetheinterfacialbondingstrengthbetwencarbonfiberandresincarbonThe resultsshowedtatTUcouldfillthegroovesonthsurfaceofcarbonfiberandreducethesurfaceroughness.WithteincreaseofTUcontent，theaverageporesizeofCPincreased，thesurfaceconductiviyemainedbasicallyunchanged，thesurfaceougnessandfracture toughnessshowed a trend of increasing first and then decreasing. When the TPU mass fraction was 49. 8% ，the fracture toughness of CP increased by 99. 8% compared with the unmodified CP，the average pore size increased by 35.2% ，and the surface roughness reduced from 28.1 μm to 26.2μm . The improvement in CP toughness was atributed to the energy dissipation caused by fiber pull-out and debonding. Under conditions of 100% relative humidity，the limiting current density and power density of a single cell reached1.28 A/cm²and （204号 347.8mW/cm2 ，respectively，achieving the fuel cellperformance of commercial CP.

Keywords：carbon paper；polyurethane;toughness；interface control

碳纸（CP）具有输气排水以及电子传导等功能，被广泛应用于质子交换膜燃料电池气体扩散层中[1-3]。（剩余15589字）