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国家自然科学基金(50875108)

作品数:14 被引量:60H指数:6
相关作者:丛茜齐迎春齐欣王京春王骥月更多>>
相关机构:吉林大学长春工程学院长春师范大学更多>>
发文基金:国家自然科学基金中国博士后科学基金教育部重点实验室开放基金更多>>
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14 条 记 录,以下是 1-10
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Fabrication of superhydrophobic AAO-Ag multilayer mimicking dragonfly wings被引量:1
2012年
Inspired by the co-coupling of the non-smooth structure and the waxy layer inducing the hydrophobicity of dragonfly wing surface,we developed a simple and versatile method to fabricate a superhydrophobic surface with the dragonfly wing structures.In this work,Ag nanorods grew on highly ordered anodic aluminum oxide(AAO) surface via a galvanic reduction approach.Then the AAO-Ag multilayer was fabricated.Furthermore,the surface free energy of AAO-Ag multilayer was reduced by modifying with perfluorodecanethiol.The modified AAO-Ag multilayer was superhydrophobic and the static contact angle reached as high as 168°.X-ray photoelectron spectra(XPS) were used to characterize the chemical structure of the obtained products.The morphologies of AAO-Ag multilayer was similar to microstructure of dragonfly wing surface and presented hierarchical rough structure.The results showed that the co-coupling of the rough structure and low surface free energy induced the superhydrophobic performance of the AAO-Ag multilayer surface.
WANG XiaoJunSONG WeiLI ZhiShiCONG Qian
关键词:AAO蜻蜓多孔阳极氧化铝
凹槽形仿生针头减阻试验及机理分析被引量:4
2013年
从仿生学角度出发,依据蚊子口器的形态结构,设计了凹槽形仿生结构针头。采用激光表面毛化处理机加工出凹槽形仿生针头,对仿生针头的穿刺阻力进行了测定,并对其刺入机理进行了分析。试验表明:凹槽形仿生针头较光滑针头具有减阻效果,且减阻效果随凹槽数量的增加而增大,凹槽宽度对针头的减阻效果呈先增后减的趋势;针头与刺入介质接触面积越小,针头减阻效果越好;凹槽结构在刺入过程中产生涡流效应,使滑动摩擦变为滚动摩擦,减小了摩擦阻力。
弯艳玲丛茜齐迎春齐欣
关键词:仿生减阻注射器针头
仿生非光滑注射器针头注射过程接触有限元模拟被引量:4
2010年
应用接触非线性有限元方法对普通针头及两种分别具有锯齿形和波纹形仿生非光滑表面针头的注射过程进行了数值模拟,求得了软组织在该过程中应力、速度、动能和内能的变化时间历程,直观描述了非光滑表面对针头在注射这一动态过程中的影响。通过三种针头的对比和分析表明,仿生非光滑针头具有减阻和减痛效果,并且具有波纹形非光滑表面的针头效果更加明显,与试验研究结果吻合。
王京春左文杰高元明葛长江任露泉
关键词:工程仿生学仿生非光滑注射器针头
无痛注射技术研究现状被引量:16
2009年
无痛注射技术的研究对促进医疗工程领域自主创新、技术进步和行业发展具有重大意义,其重要性不仅在于它的经济效益或经济作用,更在于它的社会效益。分析了注射疼痛的产生原因,总结归纳了无痛注射机理,介绍了各种无痛注射技术(如:微型针头、无针注射、减阻注射等)的研究现状及存在的问题,并对疼痛的检测方法进行了简述,最后对无痛注射技术的研究意义进行了探讨。
齐迎春李岩金敬福王京春丛茜
关键词:无痛注射
Multiple-dimensional micro/nano structural models for hydrophobicity of butterfly wing surfaces and coupling mechanism被引量:6
2015年
The microstructure, wettability and chemical composition of the butterfly wing surfaces were investigated by a scanning electron microscope, a contact angle meter and a Fourier transform infrared spectrometer. The micro/nano structural models for hydrophobicity of the butterfly wing surfaces were established on the basis of the Cassie equation. The hydrophobicity mechanisms were discussed from the perspective of biological coupling. The butterfly wing surfaces are composed of naturally hydrophobic material and possess micro/nano hierarchical structures, including primary structure (micrometric scales), secondary structure (nano longitudinal ridges and lateral bridges) and tertiary structure (nano stripes). The wing surfaces exhibit high hydrophobicity (contact angle 138°-157°) and low adhesion (sliding angle 1°-3°). The micromorphology and self-cleaning performance of the wing surfaces demonstrate remarkable anisotropism. The special complex wettability ascribes to a coupling effect of the material element and the structure element. In microdimension, the smaller the width and the bigger the spacing of the scale, the stronger the hydrophobicity of the wing surfaces. In nano-dimension, the smaller the height and the smaller the width and the bigger the spacing of the longitudinal ridge, the stronger the hydrophobicity of the wing surfaces. This work promotes our understanding of the hydrophobicity mechanism of bio-surfaces and may bring inspiration for biomimetic design and preparation of smart interfacial materials.
房岩孙刚毕雨涵智亨
关键词:SUPERHYDROPHOBICITYADHESIONBUTTERFLY
Fabrication of a Bionic Needle with both Super-Hydrophobic and Antibacterial Properties被引量:7
2013年
Many biological surfaces possess unusual micro-nano hierarchical structures that could influence their wettability, which provide new methods for the construction of novel materials. In this work, silver nanoparticles were successfully coated on the surface of stainless steel needle by a simple electroless replacement reaction process between the AgNO3 solution and the activated stainless steel needle. After the replacement reaction, porous micro/nanostructures were formed on the surface of the stainless steel needle. By modifying long chains ofthiol molecules, the stainless steel needle exhibited good super-hydrophobic property with a contact angle greater than 150°. Moreover, the silver coated stainless steel needle (bionic needle) showed strong antibacterial activity against the gram-negative bacterium Escherichia coli (E. colO. By calculating the area of the inhibition zone against E. coil formed on agar medium, the antibacterial activity of the bionic needle with the contact angle of 152° is much better than that with the contact angle of 138°. The as-prepared bionic needle with both super-hydrophobie and antibacterial properties has the potential to be applied in modem medical devices.
Xin QiWei SongZhu MaoWenran GaoQian Cong
关键词:BIONICSILVER
凹槽形仿生针头优化设计与减阻机理分析被引量:13
2012年
以蚊子和蝉的口针为原形设计了凹槽形仿生针头,运用试验优化技术,通过显示动力学接触分析,证明凹槽形仿生针头具有明显减阻效果,最高减阻率可达40.94%;分析凹槽针头表面非光滑几何形态参数对注射时针头外壁所受摩擦力的影响规律,凹槽深度对摩擦力影响最大,宽度对摩擦力影响最小,凹槽深度和宽度与摩擦力呈抛物线关系,凹槽条数与摩擦力呈线性关系,随着凹槽条数增加,摩擦力减小;探讨仿生针头减阻机理,针头凹槽结构的存在可减小针头外壁与软组织的接触面积,使软组织与针头表面间存在间隙,产生空气膜,降低摩擦因数,另一方面,可使皮肤中的液体易于逸出,增加了润滑效果。依据国标,对数值分析所用的9种凹槽形仿生针头进行了穿刺试验,试验结果与数值分析结果一致。
齐迎春丛茜王骥月齐欣
关键词:工程仿生学无痛注射正交设计针头减阻
白英甾体化合物的抗炎活性研究被引量:1
2020年
白英含有多种化学成分,具有潜在的药用价值和开发前景,但抗炎机制的研究并不完整。本实验以小鼠RAW264.7细胞为材料,研究白英甾体化合物的抗炎作用机制,研究发现:白英甾体化合物能明显抑制产生炎症的小鼠RAW264.7细胞的TNF-α的炎症因子的表达,提高炎症细胞的线粒体膜电位,白英甾体化合物可能是通过保护线粒体来实现其抗炎作用。
金丹丹房岩费瑞郝凤桐马金理杨文卓
关键词:TNF-Α线粒体膜电位抗炎
以蝴蝶翅为模板构建多级结构的超疏水表面被引量:5
2016年
以蝴蝶翅表面为生物模板,采用真空蒸镀法、软刻蚀法制备了超疏水纳米银膜、超疏水高分子膜(聚二甲基硅氧烷,PDMS).使用扫描电子显微镜(scanning electron microscope,SEM)和视频光学接触角测量仪观测了天然和仿生表面的微观形态及浸润性.结果表明:在蝴蝶(夜迷蛱蝶,Mimathyma nycteis)翅表面蒸镀的不同厚度(5,10,20,40,60,80,100nm)纳米级银膜上,接触角(contact angle,CA)均大于130°,其中蒸镀5nm银膜的表面接触角达到了150.4°.随着蒸镀银膜厚度的增加,蝴蝶翅表面的疏水性降低.仿生高分子膜表面较好地复制了蝴蝶(斑缘豆粉蝶,Colias erate)翅表面的多级微观结构和浸润性,接触角达到了153.2°.蝴蝶翅表面的微纳米多级粗糙结构使金属银和高分子膜实现了超疏水.
孙刚房岩白雪花李政文彭小唤
关键词:蝴蝶微观结构超疏水性生物材料仿生制备
基于蝉口针形态的仿生针头结构优化设计及减阻机理分析被引量:3
2014年
基于蝉上颚口针表面的非光滑结构形态,结合对蝉口针刺入机理的分析,设计出锯齿形仿生针头。采用二元二次回归正交组合试验优化设计方法,研究了锯齿宽度、锯齿间距这两个仿生结构参数对针头穿刺阻力的影响规律,求取了回归方程。得到最优仿生锯齿形针头的结构参数为:锯齿宽度0.3mm、锯齿间距2.5mm,减阻率为43.21%。锯齿形仿生针头通过减小接触面积、形成滚动轴承模型和产生微震的方式实现减阻效果,为无痛仿生针头的研制提供了依据。
王骥月丛茜齐欣张琰
关键词:工程仿生学减阻
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