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2012年全国高分子材料科学与工程研讨会

作者：陈洁彭呈方大为聂俊马贵平常州大学北京化工大学

＜正＞基于核壳结构纳米纤维在生物组织工程、药物控释以及纤维增强等方面有较高的应用价值。本文用静电纺丝法,利用水蒸气法诱导相分离,以N,N-二甲基甲酰胺（DMF）为聚丙烯腈（PAN）/聚乙烯吡咯烷酮（PVP）的共溶剂,水蒸汽作为PAN的沉... 详细信息

＜正＞基于核壳结构纳米纤维在生物组织工程、药物控释以及纤维增强等方面有较高的应用价值。本文用静电纺丝法,利用水蒸气法诱导相分离,以N,N-二甲基甲酰胺（DMF）为聚丙烯腈（PAN）/聚乙烯吡咯烷酮（PVP）的共溶剂,水蒸汽作为PAN的沉淀剂,制备了具有表面亲水的PAN/PVP核壳结构纳米纤维,考察了纺丝溶液浓度及配比对纤维形态的影响。

关键词： electrospinning nanofiber core-shell

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Nanostructured Biomaterials and Biomimicking in Biomaterials Development for the Human Body Tissue Repair

Nanostructured Biomaterials and Biomimicking in Biomaterials...

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中国化学会第26届学术年会纳米化学分会场

作者： Min Wang * Dept. of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong

Nanostructured biomaterials and objects of nanometer dimensions have unique properties that conventional biomaterials of micrometer-level structures or devices of above-the-micrometer dimensions do not possess. Nanotechnologies currently available have already made profound influences on our strategies for the human body tissue repair. They enable us to produce nanofibers, nanoparticles and nanocomposites that are potentially very useful for biomedical applications. Our work on micro- and nano-sized fibers has focused on using the electrospinning technique to fabricate biodegradable fibers. Electrospun nanofibrous structures mimic the natural extracellular matrix of human body tissues. By judicious selection of electrospinning parameters, nonwoven micro- or nano-fibrous polyhydroxybutyrate （PHB） or other polymer membranes can be fabricated. It is also possible to produce micro-sized composite fibers of biodegradable polymer matrices containing nano-sized hydroxyapatite （HA） particles. These nanocomposite fibers can be used for bone tissue engineering as HA incorporated imparts osteoconductivity on the fibrous porous structure. It has become possible to fabricate fibrous scaffolds containing aligned polymer fibers. Fibrous membranes having multilayered structures with each individual layer being aligned fibers can also be made. These porous structures of aligned fibers have potentials of being used in tendon/ligament, skin, blood vessel, and neural tissue engineering. Our exploration into the synthesis of nano-sized bioactive calcium phosphate （Ca-P） particles has several objectives. One of them is to use the Ca-P nanoparticles in biodegradable composites or scaffolds for bone tissue repair. A nanoemulsion process has been developed for the synthesis of these particles whose diameters were 5-30nm and whose Ca:P ratio could be varied. Composite scaffolds were then made using the selective laser sintering technology. In vitro studies showed that osteoblastic cells attached and proliferated on the composite scaffolds

关键词： nanoparticle nanofiber nanocomposite nanobiomaterial biomimetic

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The interaction of Schwann cells with electrospun silk fibroin nanotibers mats

The interaction of Schwann cells with electrospun silk fibro...

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中国神经科学学会第四次会员代表大会暨第八届全国学术会议

作者： Xiao-Li YAN,Ya-Hong ZHAO,Yu-Min YANG~* Jiangsu Key Laboratory of Neuroregeneration,Nantong University,Nantong,226001,China

＜正＞Objective The bridging of nerve gaps is still one of the major problems in peripheral nerve regeneration.A promising alternative for the repair of peripheral nerve injuries is the bioartificial nerve graft.Interaction between cultured nerve cells and biomaterials is of importance.For the purposes of this study,an electrospinning method was used to fabricate silk fibroin（SF） nanofibers mats for cell culture of Schwann Cells（SCs） that were harvested from rats’ sciatic nerves.Methods Characterizations of alcohol-treated SF electrospun nanofibers were investigated by attenuated total reflection Fourier transform infrared（ATR-FTIR） spectroscopy and scanning electronic microscopy（SEM）.The growth of SCs was observed by light and scanning electron microscopy at regular intervals.SCs were identified by immunocy-tochemical staining and the viability of SCs was measured by MTT assay.Results SF electrospun nanofibers exhibited a circular cross-section with a smooth surface.There was a good biological compatibility between SF electrospun nanofibers mats and SCs.Conclusion Our results indicated that SF electrospun nanofibers may be a good candidate for the peripheral nerve regeneration applications.

关键词： electrospinning nanofiber Silk fibroin Schwann cells

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Effect of Different Factors on Falling Process of Melt Electrospinning Jet

Effect of Different Factors on Falling Process of Melt Elect...

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中国材料大会2012

作者： Yong Liu Zhaoxiang Liu Liang Deng Kejian Wang Weimin Yang College of Mechanical and Electrical Engineering Beijing University of Chemical Technology

ISBN: (纸本)9783037856079

The falling process of melt electrospinning jet is different from those of solution electrospinning in which there is apparent solvent volatilization. In order to study the factors influencing on the forming process of fibers in melt electrospinning, dropping process of fibers is recorded and analyzed via high speed video camera in the article. Results showed that there was an optimal spinning temperature for melt electrospinning of the polymer;the greater the voltage was, the more obvious stretching action on jet was. However, the voltage did not exceed a certain value, because there was a spinnable voltage limit corresponding to every receiving distance. When the spinning distance was generally short, the jet swinging radius decreased with increasing spinning distance;when the spinning distance was long, the jet was subject to the influence of the environment temperature easily. The changes of viscosity had dominant influence on the motion of jet.

关键词： High speed video Melt electrospinning Buckling nanofiber

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静电纺制备石墨烯/纳晶纤维素/聚己内酯复合纳米纤维（英文）

静电纺制备石墨烯/纳晶纤维素/聚己内酯复合纳米纤维（英文）

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2015年全国高分子学术论文报告会

作者：郭飞杨诗文陈少华王桦王罗新武汉纺织大学材料科学与工程学院

In this research,nanofibers of Graphene/nanocrystallien/PCL cellulose nanofibers were prepartaion by electrospinning,Graphene was dispersed by nanocrystallien cellulose,the morphologies as well as mechanical properties and conductivity were stuied according to the content of graphene.The research reveals that the morphologies and mechanical properties of the nanofibers are the best when the content of graphene was 1.5%,and the conductivity increases significantly by the graphene content increased.

关键词： electrcspinning PCL Graphene nanocrystallien cellulose nanofiber

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Hydrothermal Synthesis and Photoluminescence of Pre-Perovskite Lead Titanate nanofibers

Hydrothermal Synthesis and Photoluminescence of Pre-Perovski...

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中国材料大会2012

作者： Junhao He Gang Xu Xiao Wei Zhaohui Ren Ge Shen Gaorong Han State Key Laboratory of Silicon Materials Department of Materials Science and EngineeringZhejiang University

ISBN: (纸本)9783037856079

Pre-perovskite PbTiO3 nanofibres were synthesized by hydrothermal method with four butyl titanate （（C4H9O）4Ti） and lead nitrate （Pb（NO3）） as the main precursors and Tetramethylammonium Hydroxide （TMAH） as mineralizer. X-ray diffraction （XRD）, Raman, Scanning Electronic Microscopy （SEM）, Transmission electron microscopy （TEM）, high-resolution TEM （HRTEM）, and the corresponding selected area electron diffraction （SEAD） were used to characterize the crystal structure and morphology of the obtained products. The results showed that the nanofibers are of a few to tens micrometer at length size, and 50～300 nm at diameter size. Based on the experimental results, the effect of Tetramethylammonium Hydroxide （TMAH） was simply discussed.

关键词： Hydrothermal Pre-perovskite PbTiO3 Single crystal nanofiber

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The electrospinning of nanofibers

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科技信息 2014年第8期 1-1,9页

作者：辛志超唐建国青岛大学杂化材料研究所

Electrospinning is a straight forward method to produce polymer fibers from polymer solutions,with fiber diameters in the range of 500 nm.In this paper the polymer nanofiber was successful made by the electrospinning method.Through the analysis of SEM,we got the conclusions that the PMMA,PAN and PVP nanofiber were successfully got from the electrospinning technology.

关键词： electrospinning nanofiber

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