电子束辐照再生丁基橡胶

介绍了电子束辐照再生丁基橡胶的技术原理,试验研究的情况,加工工艺流程,技术特点,以及推广前景,市场预测,财务评价等。     

Effect of nanometer SiC filler on the tribological behavior of PEEK under distilled water lubrication

The composites of polyetheretherketone (PEEK) filled with nanometer SiC of different proportions were prepared by compression molding. The tribological behaviors of the composites under lubrication of distilled water were investigated and compared with that under dry sliding, on an M‐200 friction and wear test rig, by running a plain carbon steel (AISI 1045 steel) ring against the composite block. The worn surfaces of nanometer SiC filled‐PEEK and the transfer film were observed by means of scanning electron microscopy (SEM) and electron probe microanalysis (EPMA). As the results, nanometer SiC as the filler greatly improves the wear resistance of PEEK under dry sliding and distilled water lubrication, though the composites show different dependence of wear resistance on the filler content. Nanometer SiC‐filled PEEK showed signs of slight scuffing under distilled water lubrication, while a thin, uniform, and tenacious transfer film was formed on the surface of the counterpart steel ring. On the contrary, unfilled PEEK under lubrication of water showed signs of severe plowing and erosion, while the worn surface of the counterpart ring was very rough, and a discontinuous PEEK transfer film was formed. Thus, the different friction and wear behaviors of unfilled PEEK and nanometer SiC‐filled PEEK can be attributed to the different characteristics of the corresponding transfer films. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 609–614, 2000     

Ordered CoFe2O4 nanowire arrays with preferred crystal orientation and magnetic anisotropy

CoFe₂O₄ nanowire arrays were fabricated by electrodeposition of Fe²⁺ and Co²⁺ into anodic aluminum oxide (AAO) templates and further oxidization. The phase structure of the nanowires is cubic spinel-type, and the XRD result exhibits perfect preferred crystallite orientation along the nanowire axes. Compared with CoFe₂O₄ nanowire arrays synthesized by other methods, the magnetic hysteresis loops demonstrate that the arrays of nanowires exhibit uniaxial magnetic anisotropy with easy magnetization direction along the nanowire axes owing to the large shape anisotropy. This approach provides a facile technology to fabricate oxide nanowires with uniaxial magnetic anisotropy.     

用废旧干电池浸出液采用共沉淀法合成V5+掺杂锰-锌铁氧体

以废旧干电池的浸出液为原料,以NH4HCO3为沉淀剂,以NH4VO3为添加剂,采用共沉淀技术制备了不同V5+掺杂量(摩尔分数,下同)的锰–锌铁氧体。采用电感耦合等离子发射光谱仪、冷原子荧光测汞仪定量分析了浸出液中各金属离子浓度。采用X射线衍射仪、扫描电子显微镜研究了样品的微观结构并测试了样品的磁性能。采用Archimedes法测试了样品的密度。结果表明:废旧电池的浸出液经金属还原法除汞后,汞离子及杂质金属离子均已去除。掺入V5+不改变单相尖晶石结构。随着V5+掺杂量的增加,样品粒径先增大后变化不明显,当V5+掺杂量为0.05%时,样品粒径更均匀,密度更大;而气孔率先减小后增大;磁导率和饱和磁感应强度随掺杂量的增加先增大后减小,且当V5+掺杂量为0.05%时最大。     

流动注射化学发光法测定盐酸利多卡因

基于盐酸利多卡因对鲁米诺-过氧化氢化学发光反应的增敏作用,结合流动注射技术,建立了流动注射化学发光反应测定盐酸利多卡因的新方法。该方法的线性范围为8．0×10^-8～5．0×10^-6g／mL,检出限为1．2×10^-4g／mE。对5．0×10^-7g／mE的盐酸利多卡因进行11次平行测定,相对标准偏差2．5％,方法简单、快速、灵敏。该法已用于针剂中盐酸利多卡因含量的测定。     

新型双季铵盐缓蚀杀菌剂的合成及其性能研究

合成了一种新型双季铵盐类缓蚀杀菌剂MBQA,探讨了其合成条件并对其分子结构进行了表征,研究了MBQA缓蚀、杀菌性能和机理.结果表明,MBQA是一种典型的阳极抑制型缓蚀剂,其杀菌性能较甲硝唑有明显改善,远远优于油田普遍使用的"1227".     

印染废水处理技术的研究进展

印染废水组分复杂,常含有多种染料,色度深、毒性强、难降解、pH值波动大,而且浓度高,废水量大,是难处理的工业废水之一。本文对国内外印染废水治理中物理法、化学法、物化法和生化法处理技术的应用和进展作了综述,同时还从前处理、染色、印花、后整理等角度介绍了减少污染源的环保生产工艺,对印染废水处理技术的发展前景进行了展望。     

石榴皮抑菌活性物质的初步研究

研究了石榴皮初提物对黄瓜枯萎病菌的室内生物活性.结果表明:在甲醇、氯仿及正己烷提取物中,甲醇提取物的抑菌活性最为显著.采用生长速率法和孢子萌发法测定了石榴皮溶剂萃取物对黄瓜枯萎病菌、番茄灰霉病菌、玉米小斑病菌和棉花立枯病菌等4种病原菌的生物活性.在甲醇提取物的石油醚、氯仿、乙酸乙酯及正丁醇萃取物中,以正丁醇萃取物的抑菌活性最强,在质量浓度为200 g/L时.对4种供试真菌的抑制率均大于70%,而对玉米小斑菌的抑制作用达90.67%,其EC50值为26.2 g/L.     

水洗工艺汽水分离系统合理优化与改进

在硫酸法生产钛白粉工艺中,水洗(偏钛酸的净化)是很重要的工序.水洗的汽水分离系统的分离效果,直接影响水洗时间和洗涤效果.由于传统汽水分离系统和汽水分离罐设计不合理,导致许多钛白企业汽水分离罐体积大、数目多,真空损耗严重,汽水分离效果不好,大大制约水洗效果.针对这一问题,从工艺路线、设备以及各单元的合理优化配置和安装要求上,提出了汽与水在混合管道内进行分离的方法和思路.通过改进,提高了分离效率,减少了真空损耗,缩短了水洗时间.     

海洋胶红酵母、光合细菌、生化黄腐酸在海参育苗和养成中的应用效果

用二氧化氯（含量≥8％）日投量1g／m^3水体两天处理一次水质,海洋胶红酵母（浓度为1X10^10cfu／mL）日投量1～10mL／m。水体、光合细菌（浓度为2×10^10cfu／mL）日投量1～10mL／m^3水体、生化黄腐酸（含量≥60％）日投量5～10g／m^3水体在海参育苗中应用。试验结果表明：与用恩诺沙星日投量1g／m^3水体、EDTA螯合剂日投量2g／m^3水体,及常规投饵方式进行比较,海参幼体烂边病发病率从20．0％降低到10．0％,烂胃病发病率从23．0％降低到10．0％。在海参养殖中应用海洋胶红酵母、光合细菌（球形红假单胞菌）,可提菏成参产量14．3％～16．4％。海洋胶红酵母、光合细菌和生化黄腐酸在海参育苗和养成中应用具有广阔前景。