静电与稳恒电流

从分析研究稳恒载流导线外表面上的电荷分布规律入手，说明组成稳恒电路的导体内部电场是包含电源电极在内的导体外表面上分布着的静电荷激发的电场，并由此得出结论；稳恒电流与静电荷是紧密相联，不可分离的。     

静电除尘用高压硅整流装置的改进

叙述荆门电厂ＧＧＡＪ０２Ｓ－０．７／７２ｋＶ型静电用高压硅整流装置改进及改进前后的运行情况。     

Scattering of Electromagnetic Waves by Drift Vortex in Plasma

In a quasi-two-dimensional model, the scattering of incident ordinary electromag- netic waves by a dipole-electrostatic drift vortex is studied with first-order Born approximation. The distribution of the scattering cross-section and total cross-section are evaluated analytically in different approximate conditions, and the physical interpretations are discussed. When the wavelength of incident wave is much longer than the vortex radius （kia〈〈1）, it is found that the angle at which the scattering cross-section reaches its maxim depends significantly on the approximation of the parameters of the vortex used. It is also found that the total scattering cross-section has an affinitive relation with the parameters of the plasma, while it is irrelevant to the frequency of the incident wave in a wide range of parameters of the vortex. In a totally different range of parameters when incident wave is in the radar-frequency range （then kia 〈〈 1, the wavelength of incident wave is much shorter than the vortex radius）, the numerical procedure is conducted with computer in order to obtain the distribution and the total expression of the scattering crosssection. Then it is found that the total scattering cross-section in the low frequency range is much larger than that in high frequency range, so the scattering is more effective in the low frequency range than in high frequency range.     

多孔聚乳酸/醋酸纤维素电纺支架的制备与生物相容性研究

以聚乳酸（PLA）和醋酸纤维素（CA）为溶质,选择二氯甲烷（DCM）和丙酮作为溶剂,通过静电纺丝技术制备多孔PLA/CA纤维。使用SEM对纤维形貌及表面结构进行观察,对纤维膜采用PDL进行表面修饰,并通过XPS分析纤维支架表面元素,将PC12细胞接种在纤维支架上,培养48 h后利用MTT法测定细胞在支架上的增殖水平。该文对无孔PLA/CA纤维、多孔PLA/CA纤维及改性后的纤维进行体外细胞增殖实验,探究多孔结构对组织工程支架的影响。结果表明,以DCM/丙酮为溶剂成功制备多孔PLA/CA纤维,这是因为这2种溶液沸点较低,在纺丝过程中由于热致相分离形成相互贯通的三维孔。多孔纤维对PDL的吸收能力强于无孔纤维,所以能够更好地促进PC12细胞的增殖。该研究表明具有多孔结构的纤维支架更适合组织工程应用。     

静电危害分析及预防措施

静电放电（ESD）的危害不但影响日常生活,还危害电子产品质量与可靠性。该文详细论述静电放电（ESD）危害的典型事件包括电缆放电事件、静电干扰CPU事件,阐述静电产生原理、静电载体、静电和ESD人体模型,提出静电放电预防方法包括接地、人体静电消除器、泄漏法、防静电工作服及印制电路板（PCB）板上火花隙的应用。通过分析静电产生的原理与防护措施,来降低静电的危害程度,以期有效保障电子产品的质量。     

造孔剂对电纺炭纤维膜微结构与性能的影响

采用静电纺丝技术与氩气保护炭化工艺,以聚丙烯腈为碳源,制备了系列柔性炭纤维膜.对比研究了不同造孔剂磺基琥珀酸钠二辛酯(NaAOT)、醋酸锌(ZnAc)以及对苯二甲酸(PTA)掺杂对炭纤维膜微结构、力学以及油水分离等性能的影响.结果表明,与未掺杂造孔剂的炭纤维(CF)相比,掺杂NaAOT、ZnAc、PTA的炭纤维内部均出现一定数量孔隙结构,孔隙分别以微孔、微孔与介孔、大孔为主,且膜柔韧性与抗拉强度均高于未掺杂造孔剂的CF膜.其中,掺杂ZnAc造孔剂的炭膜(ZnAc-CF)具有最佳的柔韧性与最高的抗拉强度(0.97 MPa).此外,3种造孔剂的掺杂均在一定程度上增大了炭纤维直径,从而导致NaAOT-CF、ZnAc-CF和PTA-CF膜均表现出更好的疏水性能.ZnAc-CF膜展现出最好的油水分离性能,其油通量达到3 440 L/(m²·h),对未乳化的油水混合物分离循环50次后,分离效率依然可维持在98%左右.     

快速油-水分离用PVDF/PDMS超疏水膜的一步法制备及性能

为了制备一种可用于快速油-水分离的超疏水膜,在高压电场作用下,通过静电纺丝法共纺聚二甲基硅氧烷(PDMS)和聚偏氟乙烯(PVDF),一步制备含有PVDF纳米纤维和带有PDMS微球的超疏水复合膜材料。采用场发射扫描电子显微镜、傅氏转换红外线光谱仪和光学接触角仪对该复合膜材料进行形貌和性能分析,结果表明：该超疏水复合膜表现出优异的油-水分离性能,油-水分离通量达到6100 L/(m²·h·bar),分离效率可达99.5%,并且可以连续生产,展现出广阔的应用前景。     

Improvement of the Energy Stability of the Single Ion Microbeam

Energy instability strongly affects the state and the beam size of the single ion microbeam. A facility based on the Generating Voltmeter was developed to improve the energy stability of the CAS-LIBB （Chinese Academy of Sciences, key laboratory of ion beam bioengineering） single ion microbeam. This paper presents the analysis of the energy＇ instability of the single ion microbeam. A simplified theoretical model is set up to calculate the relationship between the energy instability and the beam spot size. By using this technique, the energy instability is adjusted to about 1%. Stable run-time is over 6 hours. The radius of the single ion beam is reduced by 10% compared to the previous olin.