基于聚异丁烯的高性能氢燃料电池密封胶的制备与性能OA
Preparation and Properties of High Performance Sealant for Hydrogen Fuel Cells Based on Polyisobutylene
以改性聚异丁烯作为基体,利用其双键与含氢硅油之间的加成反应,制备了单组分密封胶;研究了双键与硅氢的比值(R值)、高活性聚异丁烯和二氧化硅的用量及固化条件等对密封胶力学性能的影响,并据此进行配方优化.优化后的密封胶表现出优异的力学性能,其拉伸强度、断裂伸长率和压缩永久变形分别达到3.0MPa、300％和15％.同时,密封胶具有优异耐老化性能、低氢气阻隔系数和低透湿度,可应用于氢燃料电池.
One-component sealant was prepared using modified polyisobutylene as the matrix,leveraging the addition reaction between its double bond and hydrosilicone oil.The effects of the molar ratio of double bond to silylhydride(R value),content of high reactive polyisobutylene and silica,curing conditions on the sealant's mechanical properties were investigated,thus leading to formulation optimization.The optimized sealant exhibits outstanding mechanical properties,achieving tensile strength,elongation at break,and compression set of 3.0 MPa,300％,and 15％,respectively.Concurrently,the sealant demonstrates excellent aging resistance,low hydrogen transmission coefficient and low moisture permeability,making it suitable for hydrogen fuel cell applications.
曹健;胡建华;李艳;刘平
华南理工大学材料科学与工程学院,广东 广州 510640||广东时利和汽车实业集团有限公司,广东佛山 528222广东时利和汽车实业集团有限公司,广东佛山 528222广东时利和汽车实业集团有限公司,广东佛山 528222华南理工大学材料科学与工程学院,广东 广州 510640||广东时利和汽车实业集团有限公司,广东佛山 528222
化学化工
聚异丁烯密封胶力学性能氢燃料电池
polyisobutylenesealantmechanical propertieshydrogen fuel cells
《合成材料老化与应用》 2026 (2)
1-4,4
评论