期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Synthesis of novel gelatin/poly(acrylic acid) nanorods via the self-assembly of nanospheres 被引量:1
1
作者 DING Dan WANG Jing +2 位作者 CHEN Ying WU Wei jiang xiqun 《Science China Chemistry》 SCIE EI CAS 2011年第2期392-396,共5页
In this work, gelatin-poly(acrylic acid) (GEL-PAA) nanospheres with diameter of around 35 nm were prepared using a polymermonomer (gelatin-AA) pair reaction system. These nanospheres can self-assemble into nanor... In this work, gelatin-poly(acrylic acid) (GEL-PAA) nanospheres with diameter of around 35 nm were prepared using a polymermonomer (gelatin-AA) pair reaction system. These nanospheres can self-assemble into nanorods in aqueous solution at 4 ℃. Based on the observation that the intermediate state of the formation of the nanorods and the facts that the self-assembly can only occur at relatively low temperature and the gelatin molecules on the outermost layer of the GEL-PAA nanospheres can be renatured to triple helix conformation, it can be rationally inferred that the hydrogen bonding and electrostatic interactions between the gelatin molecules with the triple helix structure induce the one-dimensional self-assembly of the nanospheres into nanorods. 展开更多
关键词 GELATIN NANORODS triple helical conformation one-dimensional self-assembly
原文传递
Preparation of porous chitosan-poly(acrylic acid)-calcium phosphate hybrid nanoparticles via mineralization
2
作者 CHEN ChangJing DENG Yu +2 位作者 YAN ErYun HU Yong jiang xiqun 《Chinese Science Bulletin》 SCIE EI CAS 2009年第18期3127-3136,共10页
In this work, the preparation of chitosan-poly(acrylic acid)-calcium phosphate hybrid nanoparticles (CS-PAA-CaP NP) based on the mineralization of calcium phosphate (CaP) on the surface of chito-san-poly (acrylic acid... In this work, the preparation of chitosan-poly(acrylic acid)-calcium phosphate hybrid nanoparticles (CS-PAA-CaP NP) based on the mineralization of calcium phosphate (CaP) on the surface of chito-san-poly (acrylic acid) nanoparticles (CS-PAA NPs) was reported. CS-PAA-CaP NPs were achieved by directly adding ammonia to the aqueous solution of CS-PAA nanoparticles or by thermal decomposi-tion of urea in the aqueous solution of CS-PAA nanoparticles, resulting in the mineralization of CaP on the surface of CS-PAA NPs. Through these two routes, especially using urea as a pH-regulator, the precipitation of CS-PAA NPs, a common occurrence in basic environment, was avoided. The size, morphology and ingredient of CS-PAA-CaP hybrid nanoparticles were characterized by dynamic light scattering (DLS), transmission electron microscope (TEM), scanning electron microscope (SEM), thermogravimetry analysis (TGA) and X-ray diffractometer (XRD). When urea was used as the pH regulator to facilitate the mineralization during the thermal urea decomposition procedure, regular CS-PAA-CaP hybrid nanoparticles with a porosity-structural CaP shells and 400―600 nm size were obtained. TGA result revealed that the hybrid NPs contained approximately 23% inorganic component, which was consistent with the ratio of starting materials. The XRD spectra of hybrid nanoparticles in-dicated that dicalcium phosphate (DCP: CaHPO4) crystal was a dominant component of mineralization. The porous structure of the CS-PAA-CaP hybrid NPs might be greatly useful in pharmaceutical and other medical applications. 展开更多
关键词 纳米粒子 丙烯酸 壳聚糖 磷酸钙 多孔 制备 混合 矿化
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部