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Inthis paper, 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) was synthesizedand used as solvent to dissolve bamboo pulp. Dimethylsulfoxide (DMSO)was selected as cosolvent to adjust the solution viscosity. As comparedwith the bamboo pulp/[Bmim]Cl system, the addition of DMSO decreasesthe solution viscosity dramatically. Afterward, cellulose hollow fibermembranes were prepared by dry-wet spinning process using 75 wt %[Bmim]Cl + 25 wt % DMSO as solvent. Scanning electron microscope (SEM),mechanical testing, pure water permeability, and retention rate wereused to characterize its properties, respectively. The SEM resultshows that the prepared cellulose hollow fiber membrane presents densesurface structure, which leads to a relative high tensile strengthand retention rate to bovine serum albumin, i.e. 28 MPa and 98%, respectively,but a relative low pure water permeability, i.e. 83 L/m2·h. In the end, the [Bmim]Cl is recovered by azeotropy, andthe recycling yield reaches 99 wt %. [ABSTRACT FROM AUTHOR]

Novel amphiphilic conetworks (APCNs) with uniform channel size were synthesized through end-cross-linking of well-defined amphiphilic triblock copolymers via atom transfer radical polymerization (ATRP). A new ditelechelic polydimethylsiloxane macroinitiator was synthesized to initiate the polymerization of N,N-dimethylacrylamide. The resulting triblock copolymers show well-defined molecular weight with narrow polydisperisty, which are telechelic modified by allylamine and fully cross-linked with polyhydrosiloxanes through hydrosilylation. Transmission electron microscopy shows that the APCN has the behavior of microphase separation with small channel size and uniform phase domain. The resulting APCNs with idealized microstructure exhibit a combination of excellent properties, i.e., superhigh mechanical strength (4 ± 1 MPa) and elongation ratio (175 ± 25%), outstanding oxygen permeability (350 ± 150 barrers), a high water uptake property, and excellent biocompatibility, indicating that in this way, "near perfect" networks are obtained. These results are better than those reported in the literature, suggesting a promising semipermeable barrier for islet encapsulation in relative biomaterial fields.