偶联剂

Abstract(#br)Polydimethylsiloxane (PDMS) coated membranes on a polysulfone (PSf) support were fabricated for propylene recovery from off-gas stream. PDMS coated membrane, however, showed trade-off trends that permeability and selectivity are inversely proportional to each other. Addition of silica nanoparticles of 12–400\u003cce:hsp sp=\"0.25\"/\u003enm size into PDMS matrix enhanced both separation factor and propylene permeance from 5.2 to 7.3 from 31 to 36\u003cce:hsp sp=\"0.25\"/\u003eGPU, respectively. Silica nanoparticles in composite membrane tended to agglomerate with each other.

Abstract(#br)Surface treatment of polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) fibers was conducted with coupling agents such as epoxy silane, amino silane, and titanate to improve the adhesion characteristics of PVDF-HFP fibers and polydimethylsiloxane (PDMS). The adhesion strength was largest when 4\u003cce:hsp sp=\"0.25\"/\u003ewt% amino silane was used for surface treatment, showing a 250% improvement compared to the untreated case.