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Topologically ordered surfaces with a polymer brush-grafted layer were prepared by a combination of nano-imprinting (NI) and surface-initiated atom transfer radical polymerization (SI-ATRP). The molecular aggregation state and the wetting were evaluated by synchrotron radiation X-ray analyses and water droplet contact angle measurements, respectively. An ordered topography was fabricated onto a spin...
Chain orientation of poly(glycolic acid) (PGA) induced by halloysite nanotubes (HNTs) in hybrid electrospun fibers was investigated. The well-aligned PGA/HNTs hybrid fibers were prepared by electrospinning. The influence of HNTs loading (0, 1, 5, 10 wt%) on the PGA molecular chain and crystallite orientation was characterized by polarized Fourier transform infrared spectroscopy (FT-IR) and wide angle...
For practical applications of poly(l-lactic acid) (PLLA), PLLA crystallization with keeping transparency is preferable. As one method to keep transparency without inhibiting crystallization, we prepared SiO2 nanoparticles which were modified with poly (methyl methacrylate) (PMMA-g-SiO2). FT-IR and TG–DTA measurement indicated that PMMA was grafted on SiO2 surface successfully. TG–DTA and GPC measurement...
Nanoimprint lithography (NIL) was carried out on precursor of polyimide (PI), poly(amic acid) film, and then hard baking to obtain imprinted PI film. The molecular aggregation states of imprinted PI films before and after hard baking were investigated by grazing-incidence wide-angle X-ray diffraction comparing with the one of flat PI film. It was found that NIL and hard baking can strongly affect...
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