LI Ya-juan, DANG Ya-gu, FEI De-jun. Study on performance HEC/PVDF wet-sensing material for fiber-optic humidity sensor[J]. 2010, 29(5): 77-79. DOI: 10.13873/j.1000-97872010.05.028.
A refractive index change type optical fiber sensor baseds on blends of polyvinylidene fluoride(PVDF)and hydroxyethyl cellulose(HEC)as wet-sensing material is fabricated.The thickness
length
as well as the ratio of blends of wet-sensing film were studied
and then were characterized by scanning electron microscopy(SEM).The results showed that the coated film made from blends of PVDF and HEC has the advantage of anti-human error
not required temperature compensation at room temperature
etc.The wet-sensing film made of 1∶2(PVDF:HEC)has the best performance of wide detecting range and high sensitivity.