qingzinano: Zeolite Hollow Fibers Taking advantage of coaxial electrospinning, zeolite hollow fibers
qingzinano: Zeolite Hollow Fibers Taking advantage of coaxial electrospinning, zeolite hollow fibers were fabricated by Jiang and Yu’s group using coelectrospinning followed by calcination, in 2008 (Di et al., 2008). Core-shell fibers were obtained first, using a suspension of silicalite-1 NPs in PVP/ethanol solution as the outer fluid, while paraffin oil was used as the inner liquid. An appropriate proportion of PVP and silicalite-1 was necessary because the silicalite-1 suspension could not be electrospun alone, while the viscous PVP solution could make the blend feasible for fluent electrospinning and served as an adhesive to bond the silicalite-1 NPs together. By subsequent calcination in air at 550C for 6 h, these composite fibers transformed into zeolite hollow fibers with removal of paraffin oil, tetrapropylammonium hydroxide, and PVP. The zeolite hollow fibers had good mechanical strength with great performance of self-standing. Moreover, the zeolite hollow fibers had a hierarchical intersecting channel structure and rough wall constructed by the NPs. The morphology and chemical composition of the as-spun fibers composed of silicalite-1 and PVP by coelectrospinning are shown in Fig. 5.10. -- source link
#materials science#science#zeolites#fibers#electrospinning#magnified view