掺碘对石墨导电涂料性能的影响

研究了石墨-聚苯乙烯-苯、石墨-醇酸清漆-稀释剂、石墨-硝基清漆-稀释剂3种涂料中分别掺入碘后对涂料导电性能的影响，实验表明，掺碘后3种涂料的导电性分别提高到3.1倍、4.5倍、13.1倍，其增导机理有：一是生成石墨-碘传荷络合物，二是碘与聚合物反应生成了极性基团，在相同情况下，溶液型涂料导电性高于溶胶型涂料。     

聚苯胺／氟碳乳液复合涂层的防腐蚀性能

以聚苯乙烯磺酸（PSSA）为掺杂剂,制备水性聚苯胺（PANI）-蒙脱土（MMT）复合材料,再以水性氟碳乳液（FC）为成膜物,制备水分散体PANIL氟碳乳液复合涂层材料用于A3钢的防腐蚀。利用平衡开路电位（OCP）、电化学交流阻抗谱（EIS）、Tafel曲线考察了掺杂剂和蒙脱土对防腐蚀性能的影响。XRD结果表明PANI—MMT复合材料中的蒙脱土以片层剥离状态存在;当n（PSSA）：n（An）=1．5：1和m（An）：m（MMT）=1：2．5时,复合涂层具有较高的阻抗,显著提高了金属的腐蚀电位（-0．75V）,降低了金属的腐蚀电流密度（10^-7.5A／cm^2）。     

聚吡咯涂层尼龙导电织物的性能研究

选用尼龙作为基材,以吡咯为单体,对甲苯磺酸为掺杂剂,过硫酸铵为氧化剂,采用简单易行的液相原位聚合法制备聚吡咯涂层导电尼龙织物。首先,研究了其导电性、聚吡咯在织物表面的分布状态。其次,测试了聚吡咯涂层尼龙导电织物的力学性能和透湿性能。结果表明:制备的聚吡咯涂层尼龙织物的导电性能良好,聚吡咯在尼龙上的分布较均匀。聚吡咯涂层对织物本身断裂强力和透湿性能基本无影响。     

水性聚苯胺／氟碳复合乳液涂层的防腐蚀性能

以十二烷基苯磺酸（DBSA）为乳化剂和掺杂剂,制备了水性聚苯胺（PANI）乳液,X射线衍射分析（XRD）结果表明,DBSA掺杂的PANI分子链伸展性较好;粒径测试结果表明聚苯胺乳胶粒子分布均匀,平均粒径约为250nm。冉以水性氟碳（FC）乳液为成膜物制备了水性PANUFC复合乳液涂层材料,利用电化学交流阻抗谱（EIS）、Tafel曲线（Tafel）、平衡开路电位（OCP）考察了其对Q235低碳钢的防腐蚀性能。结果表明,PANI／FC复合乳液涂层具有较高的阻抗．显著地提高了金属的腐蚀电位（-0．4V）,降低了金属的腐蚀电流密度（10-6A／cm2）。当m（PANI）：m（FC）=1：1时,复合涂层对Q235碳钢的防腐蚀性能最好。     

磷酸改性天然石墨负极材料的设计、制备及性能研究

利用石墨层间化合物技术处理天然石墨,使磷酸进入到石墨层表面,并在石墨表面包覆一层有机胺中间体,然后在惰性气氛下进行高温处理。研究发现,所得材料在保持石墨原始结构不被破坏的情况下,增大了石墨的层间距,为锂离子的嵌入和脱出拓宽了通道,也为材料在充放电过程中预留了膨胀体积。将这种材料用于锂离子电池负极材料、电化学性能测试表明或改性材料中可具有更小的不可逆容量和更高的充放电效率,并且在大电流充放电情况下,倍率性能得到了提升。     

聚苯胺涂层导电涤纶纤维的制备与性能

先对涤纶纤维进行了碱减量处理,然后在液相中使苯胺在涤纶纤维表面原位聚合而制得聚苯胺涂层导电涤纶纤维。讨论了氧化剂与苯胺的初始摩尔比、苯胺单体浓度、掺杂酸浓度、反应温度及反应时间对纤维导电性能的影响。结果表明,该导电涤纶纤维的电导率在１０＾－２－１０＾－５Ｓ．ｃｍ＾－１范围内,且基本保持了其原有的力学性能。     

石墨砂浆渗浇钢纤维混凝土导电机理研究

系统地研究了石墨砂浆渗浇钢纤维混凝土（GSIFCON）的导电性能。试验研究了不同掺量石墨对石墨砂浆的流动性和GSIFCON的力学性能的影响,并优选出了石墨的最佳掺量。分别测定了在交流电和直流电作用下,GSIFCON的电阻率变化。试验结果表明,石墨掺量对GSIFCON电阻率变化有明显的影响且存在明显的渗滤阈值。通过对SIFCON（砂浆渗浇钢纤维混凝土）和GSIFCON电阻率变化的分析,给出了GSIFCON的导电机理模型。     

聚醚砜/热膨胀石墨导电纳米复合材料的制备与性能研究

为改善PES的力学性能、热性能和电性能,采用熔融插层法制备了聚醚砜(PES)/热膨胀石墨(EG)导电纳米复合材料(PES/EG),并利用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、热重分析(TGA)、X射线衍射(XRD)、密度测试、吸水率测试以及拉伸试验分别对PES/EG导电纳米复合材料的微观形貌、热性能、结晶性能、密度、吸水性及力学性能进行了分析测试。结果表明,当EG的质量分数为6%时,PES/EG导电纳米复合材料的综合力学性能较好。热性能测试表明,加入质量分数为6%的EG使基体PES的T-5%提高了4.8 oC。TEM和SEM分析表明,EG的表面处理改善了与基体PES的界面相互作用,EG经熔融插层后以10～30 nm的薄片均匀分散于PES基体中。电性能测试表明,当加入质量分数为2%的EG时,复合材料的电导率提高了12个数量级,其导电逾渗阀值小于2%。综合考虑复合材料的力学和电性能,添加的EG的质量分数应低于6%。     

The Effect of Relative Humidity on the Corrosion-resisting Property of Fluorocarbon Coating

The effect of relative humidity on the corrosion-resisting property of fluorocarbon coating was investigated by water vapor transmission technique and electrochemical impedance spectroscopy technique. Measuremerits were carried out on samples, which were tested in an accelerated corrosion environment for the same time （300, 500, 800 and 1000 h ）. The experimental results were obtained as follows： （i） The water absorption, coating resistance and corrosion rate of metal under the coating changed with relative humidity and aging time, the results obtained by EIS are good consistent with those by water vapor transmission technique ; （ ii ） when the subject investigated presented two time constant, the goodness of fit by EEC R （ C （ R （ CR ） ） ） was inferior to that by EEC R（ C（ R（QR） ） ）, but the error of parameters acquired from the former was smaller, by which we could analyze the experiment result quantitatively. With the appearance of diffusion layer on the metal, the difference of metal capacitance was aggravated, the error of parameters acquired from EEC R（ C（ R（ C（RW） ） ） ）was bigger than that from EEC R（ C（ R（ Q（ RW） ） ） ） .     

石墨电极表面的热喷涂扩散渗铝工艺

为了提高石墨电极的使用寿命,避免电极燃烧部位掉进炼钢炉增加钢的含碳量,从而降低钢的质量,本文研究开发了电极表面的热喷涂扩散渗铝工艺,利用该工艺制备的涂层电极,在间隙式电炉中炼钢时,降低电极单耗20%～30%,吨钢节约电极费用5～10元.     

无皂乳液聚合法制备氟碳聚合物乳液

通过低聚物形成、种子乳液制备和核壳乳液聚合工艺,制备自交联氟碳聚合物乳液,由实验优化配方和工艺参数.研究结果表明,无皂乳液聚合法制备核壳结构自交联氟碳聚合物乳液的较佳条件是:n(BA)∶n(MAA)=1.0∶1.60,低聚物P(BA/MANa)用量为6%,m(BA)∶m(MMA)=40∶60,自交联单体加量为2%,丙烯酸六氟丁酯用量为15%,反应温度为80℃,引发体系为过硫酸钾与亚硫酸氢钠的混合物.通过FTIR、TEM、MFT、乳胶膜的接触角和吸水率等对产物进行结构表征和性能检测,结果表明,用该方法制备的氟碳聚合物乳液,其成膜稳定性和乳胶膜性能均优于用常规法制备的.     

Preparation of self-crosslinked fluorocarbon polymer emulsion with core-shell structure by the method of soap-free emulsion polymerization

Using methyl methacrylate (MMA), butyl acrylate(BA) and hexafluorobutyl acrylate(HFBA) as main raw materials, we prepared self-crosslinked fluorocarbon polymer emulsion with core-shell structure via soap-free emulsion polymerization when the conception of particle design and polymer morphology was adopted. Moreover, the influence of mole ratio of BA to MAA, pH value on the oligomer was studied. And the effects of the added amount of oligomer, self-crosslinked monomer and HFBA, mass ratio of BA to MMA, reaction temperature and the initiator on the polymerization technology and the performance of the product, were investigated and optimized. The structure and performance of the fluorocarbon polymer emulsion were characterized and tested with FTIR, TEM, MFT and contact angle and water absorption of the latex film. The experimental results show that the optimal conditions for preparing fluorocarbon polymer emulsion are as follows: for preparing the oligomer, mol ratio of BA to MAA is equal to 1.0: 1.60, and pH value is controlled within the range of 8.0 and 9.0; for preparing fluorocarbon polymer emulsion, the added amount of oligmer[P(BA/MANa)] is 6%; mass ratio of BA to MMA is 40: 60; the added amount of self-crosslinked monomer is 2%, the added amount of HFBA is 15%; reaction temperature is 80 °C; the mixture of potassium persulfate and sodium bisulfite is used as the initiator. The film-forming stability of the fluorocarbon polymer emulsion and the performance of the latex film, which is prepared with the soap-free emulsion polymerization, are better than that prepared with the conventional emulsion polymerization. Funded by the Jiangsu Provincial Creative Fund for Scientific and Technical Small and Medium-size Enterprise     

Preparation of Graphite Gangue Wall Body Materials By Solidifying Technique

1　IntroductionGraphite,akindofinorganicnonmetalmaterial,isnecessaryforchemicalandelectricalequipmentindustry .Moreover,italsoplaysanimportantroleinthenationaldefenseindustryandhigh techproductions .Butaplentyofgangueisabandonedafterrefininggraphitemine .Thegangueparticleistinywithalowspecificgravity .Thedumpofganguenotonlyoccupiesmuchlandbutalsopol lutestheenvironmentbadly .Soitisimportantforfactoriestomakegooduseofthegangue .Asfarasourpresentconstruction’sleveliscon cerned ,thebrickisstil…     

Mierostrueture and Properties of A IN Coating/Graphite Fabrieated via In-situ Reaction

A novel method was used to fabricate AlN coating on graphite substrate. This approach included two steps： firstly, the emulsion composed of BN and anhydrous ethanol was sprayed on the surface of the graphite substrate; secondly, AlN coating was formed through the in-situ reaction of Al with the sprayed BN. The reaction was investigated by thermogravimetric-differential thermal analysis （TG-DTA）, and the phase composition in the synthetic process was characterized by X-ray diffraction （XRD）. Scanning electronic microscopy （SEM） was used to observe the morphology, and electron probe microanalysis （EPMA） was used to observe the distribution of the elements. The experimental results show that the AlN coating is dense and bonded with graphite tightly.     

酚醛环氧树脂作为预聚物的紫外光固化涂料的制备及性能研究

以酚醛环氧树脂(F-51)、邻甲酚缩水甘油醚(JX-017)、聚己内酯二元醇(Polyol-0201)和三芳基锍鎓六氟锑酸盐(UVI-6976)作为组分制备一种阳离子型紫外光固化涂料,利用凝胶率测定法对其紫外光固化涂料的光敏性进行研究。同时,对该紫外光固化涂料的贮存稳定性以及它的光固化膜的拉伸性能,冲击强度和铅笔硬度进行了研究。在F-51质量分数60%,JX-017质量分数20%,Polyol-0201质量分数15%和UVI-6976质量分数5.0%时所制备的紫外光固化涂料,其紫外光光固化膜的拉伸强度、断裂伸长率、冲击强度和铅笔硬度分别为30.95 MPa、5.95%、9 kg·cm和5H。     

钛纳米改性聚合物防腐涂料的研究

为保护大庆油田三元复合液中油管,以钛纳米改性聚合物为主要原料,研制了钛纳米改性聚合物重防腐涂料.采用透射电子显微镜(TEM)研究了钛纳米改性聚合物平均粒径.采用正交试验法,确定最佳原料配比.采用扫描电子显微镜(SEM)研究了漆膜腐蚀.采用金相显微镜研究了钛纳米改性聚合物在漆膜中的分布.探讨了油管的腐蚀机理和钛纳米涂料的防护机理.实验结果表明:钛纳米含量为6%时,涂料具有最佳的防腐蚀效果,能很好的保护大庆油田三元复合液中的油管,并具有优异的抗化学药品介质的腐蚀性能.     

镍钛合金表面含壳聚糖的钙磷复合涂层的仿生合成

将高浓度模拟体液5×SBF与壳聚糖溶液相互结合,在预处理后的镍钛合金基体上快速形成了含壳聚糖的钙磷复合涂层。电化学测试表明,钙磷涂层复合壳聚糖以后,阳极极化曲线中的钝化区变宽,击穿电位明显升高,涂层的抗腐蚀性增强。复合涂层在单倍模拟体液SBF中浸泡4d后,SEM、EDS对涂层的测试结果表明,复合涂层具有良好的生物活性。