Morphology and Adhesion Force of Aramid Fibrids
Aramid pulps(or fibrids)often act as binder in aramid sheet,its features of morphology and binding properties are very important for the mechanical,dielectrical and thermal properties of aramid sheet.The microstructure features of aramid pulps were characterized by atomic force microscopy (AFM)in tapping mode,as well as the scanning electric microscopy(SEM)and polarized optical microscopy (POM).The binding properties of pulps were determined by adhesion force with AFM tip coating technique.The aramid pulps exhibit ribbon-like shape in SEM,branching crystal in POM,and grain like in AFM,which indicated the high shearing forces in its producing process.It can be made into sheet,and the surface features had greatly changed after the fibrids sheet was calendered at high temperature and pressure.They were adhered together and the bonding strength significantly increased.The surface of fibrids sheet became smoother after calendering.The adhesion forces between the fibrids were measured by AFM pull-off force.AFM force-distance curves,between grafted tips and screened fibrids surface,were carried out in contact mode.Calibration of the cantilever(spring constant and tip radius)is of major importance to obtain quantitative data.The tip was coated with fibrids and then the fibrids-fiber force,and fibrids-fibrids force was measured.
aramid fiber morphology adhesion force microstructure Atomic force microscopy (AFM)
SUFENG ZHANG MEIYUN ZHANG KECHENG LI
College of Pulp and Paper Engineering,Shaanxi University of Science and Technology,Xian,Shaanxi,712 Department of Chemical Engineering and Limerick Pulp and Paper Centre,University of New Brunswick,Fr
国际会议
第二届国际造纸与环境学术会议(The Second International Papermaking & Environment Conference)
天津
英文
939-945
2008-05-14（万方平台首次上网日期，不代表论文的发表时间）