Optimization Conditions for Preparation Of Polyvinyl Alcohol- Alumina Gel Composite and its Properties


A preparation of poly (vinyl alcohol) (PVA)/alumina (Al 2O3) gelcomposite was investigated.This type of composite gel was carried out with two stages firstly thehydrolysis of polyvinyl alcohol in a hot water at 200ºC for 2 hours and differentmixing ratio of (PVA/H2O) solution at (10,20,30,40,50) wt% has beeninvestigated to check its operating conditions .Secondly different ratios of aluminarefractory were used (5,10,15,20,25) wt% of (AL2O3 /PVA) at 350ºC for 4 hoursto give a completes composite gel of ( PVA/Al2O3) in a polymerization stage.The final composite gel of (Al2O3/PVA) is molded in a different shapesand size due to suitable characteristics tests in order to check chemical, thermal,and mechanical properties afterward curing these specimens at 120ºCfor 2 hoursto complete the compatibility of composite gel.The results tests proved that: All final composite gel specimen is moreefficient than other base polyvinyl alcohol (PVA) of high mechanical and thermalproperties than base one with less internal stresses, also the resistance for chemicalsolutions in (100%H2O, 10%H2SO4) is increased at sever conditions at 50ºC for5 days especially for optimum mixing ratio specimen No.3 with preference foroptimum sample No.3 of (30%PVA Sol./15% Al2O3) g/g.