SBA-15改性氧化石墨烯的环氧复合涂层制备及其防腐性能

用γ-氨丙基三乙氧基硅烷(KH-550)将SBA-15分子筛接枝到氧化石墨烯上制备功能填料,并将其填充到水性环氧树脂中制备复合涂层。采用FTIR、XRD、氮气吸附脱附和TEM对填料进行了表征;采用电化学阻抗谱(EIS)、盐雾实验和附着力测试等方法对不同填料添加量涂层的防腐性能及力学性能进行了表征。实验结果表明:当功能填料添加质量分数为1.0%(占体系总质量)时,涂层电化学阻抗值达到4×10~8Ω·cm~2,同时具有最佳耐盐雾性能以及附着力性能。复合涂层的防腐性能明显优于纯环氧涂层,这主要是因为功能填料的孔/片协同结构有效地延缓了腐蚀粒子到达金属基材表面的时间。     

石墨烯光固化涂料的制备及防腐性能研究

为了提高光固化涂料的耐腐蚀性，将不同质量分数的石墨烯添加到光固化涂料中，制备了石墨烯复合光固化防腐涂层。对不同含量石墨烯复合光固化防腐涂层的硬度、耐冲击性、附着力等物理性能进行测试，并通过极化曲线、电化学阻抗谱等对其电化学性能进行了研究。最后，采用盐雾试验对不同石墨烯添加量的光固化涂层的防腐性能进行了评价。结果表明：当石墨烯的添加量为 0.1%时，涂层的硬度、耐冲击性以及附着力等物理性能得到显著增强，此时涂层的腐蚀电位最高，腐蚀电流密度最低，具有优异的耐腐蚀性能。     

卡拉胶改性三聚磷酸铝对水性环氧涂层防腐性能的影响

通通过卡拉胶（KC）对三聚磷酸铝（ATP）进行接枝改性获得KC-ATP改性填料,再将其添加到水性环氧树脂（WEP）中制备复合防腐涂层。采用FTIR、XPS、TG、SEM对ATP改性前后的形貌、结构进行表征。结果表明,KC成功地接枝到ATP表面,改善了ATP的水溶性。采用电化学阻抗谱（EIS）和盐雾实验考察了复合涂层的防腐性能。结果表明,复合涂层的防腐性能明显优于纯水性环氧涂层,且当KC-ATP功能填料含量为1.0%时（以水性环氧树脂的质量为基准,下同）,涂层的耐腐蚀性能达到最佳,浸泡48 h后涂层的极化电阻Rp为8.183×107 Ω∙cm2,远高于ATP改性复合涂层和纯环氧涂层。     

卡拉胶改性三聚磷酸铝对水性环氧涂层防腐性能的影响

采用卡拉胶(KC)对三聚磷酸铝(ATP)进行接枝改性获得了KC-ATP填料,再将其添加到水性环氧树脂(WEP)中制备了复合防腐涂层.通过FTIR、XPS、TG、SEM对ATP改性前后的形貌、结构进行了表征.采用电化学阻抗谱(EIS)和盐雾实验考察了复合涂层的防腐性能.结果表明,KC成功地接枝到ATP表面,改善了ATP的水溶性.复合涂层的防腐性能明显优于纯水性环氧涂层,且当KC-ATP填料含量为1.0％时(以水性环氧树脂的质量为基准,下同),涂层的耐腐蚀性能达到最佳,浸泡48 h后涂层的极化电阻Rp为8.183×107?·cm2,远高于ATP改性复合涂层和纯环氧涂层.     

石墨烯在环氧富锌底漆中的应用

用石墨烯替代环氧富锌底漆中的部分锌粉,制备了一种锌烯复合涂料。采用盐雾、耐冲击、附着力以及电化学等测试方法对不同石墨烯含量的锌烯复合涂料和环氧富锌底漆的性能进行了评价,并对锌烯复合涂料的防腐机理进行了分析。结果表明:石墨烯添加量为1%时,锌烯复合涂层具有最佳的防腐性能。     

环保型金属防腐涂料性能关键影响因素研究

采用水性硅溶胶与硅丙树脂复配制备了一系列环保型金属防腐涂料,并研究了不同因素对涂料的力学性能、防腐性能及耐久性能的影响。试验结果表明:填料的种类对涂层的防腐性能有重要影响,其中添加超细玻璃粉的涂层防腐性能较好,在测试中未出现毛边、锈蚀蔓延、起泡等情况;涂料的耐盐雾性能随着研磨时间的增加先增强、后减弱;铝银浆粒径大小对银白涂层膜面影响较大;消光粉的添加量决定了涂层的光泽度,随其添加量的增加,涂层光泽度下降,可用于制备亚光涂层;喷砂处理制备的涂层附着力较强,是提高产品耐盐雾性的重要手段。     

石墨烯-锌粉水性环氧复合涂料的制备与研究

通过填料与石墨烯(graphene,GR)浆料预混合的工艺制备石墨烯复合粉体,采用石墨烯复合粉体替代传统环氧富锌涂料中的部分锌粉,最终制备了一种GR-锌粉水性环氧复合涂料。利用原子力显微镜(Atomic Force Microscope,AFM)及扫描电镜(Scanning Electron Microscope,SEM)分析其在混合粉料中的分散性;利用耐盐雾实验考察涂料的防腐性能,结果表明:添加GR能有效提高水性环氧锌粉复合涂层的耐腐蚀性能,并且石墨烯浓度为0.25%的复合粉体掺量下的环氧锌粉复合涂料表现出最佳的腐蚀防护性能;同时由于GR的加入,涂层耐冲击性、弯曲性和附着力都得到增强。并通过电化学实验得到涂料的腐蚀电流密度(Icorr)和腐蚀电压(Ecorr)表征涂料的防腐机理,结果表明0.25%石墨烯复合粉体制备的涂料具有最小的腐蚀速率。     

缺陷砖头状钴基金属有机框架化合物对松香基醇酸树脂清漆防腐性能的影响

为提高醇酸树脂清漆耐腐蚀性，添加水热法制备的钴基金属有机框架化合物（Co-MOF）作为缓蚀剂。利用X射线衍射仪、扫描电子显微镜对Co-MOF进行表征，借助极化曲线、交流阻抗技术、盐雾腐蚀试验等，研究Co-MOF的添加量对涂层防腐性能的影响。结果表明：当Co-MOF的添加量为0.15%时，涂层的耐腐蚀性提升效果最佳，涂层的腐蚀电流密度由21.02μA/cm2降低至1.83μA/cm2，盐雾试验与电化学测试结果一致，硬度提升至4H。说明Co-MOF的添加可以显著提高涂层的防腐性，且最佳添加量为0.15%。     

三层水性丙烯酸酯重防腐涂层的制备与性能研究

针对不同涂层的功能要求选用不同特点的成膜物质和功能填料,设计并制备了三层水性丙烯酸酯重防腐涂层材料。通过各功能涂层之间的独特配合,有效提高了涂层对重腐蚀介质的抗渗透性以及对碳钢的附着力,耐盐雾性能可以达到35 d。制备的涂层性能优于传统的溶剂型涂层,可用于抗酸、碱、盐或石油化工等重防腐领域。     

石墨烯与氧化石墨烯增强富锌环氧涂层防腐性能的研究

研究了三种不同锌粉含量的富锌环氧底漆的腐性能,包括厚度、硬度、附着力等物理测试,比较了这三种不同锌粉含量的耐盐雾性能的差异。从而在这三种不同锌粉含量的环氧漆中选择出一种,用以进行后续的实验研究。其次,我们研究了氧化石墨烯(GO)增强富锌环氧涂层的防腐性能,包括物理性能的测试、电化学性能的测试和耐中性盐雾测试。最后,我们研究了石墨烯(G)增强富锌环氧涂层的防腐性能,同样对添加石墨烯的复合涂层进行了物理测试、电化学测试和耐中性盐雾测试。并对氧化石墨烯/富锌环氧复合涂层(GO/Zn)和石墨烯/富锌环氧复合涂层(G/Zn)的防腐性能进行了对比。发现,添加石墨烯的复合涂层(G/Zn)性能比添加氧化石墨烯的复合涂层(GO/Zn)好,且在石墨烯含量为1%时防腐性能最好。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Many Drugs of Abuse May Be Acutely Transformed to Dopamine,Norepinephrine and Epinephrine In Vivo

It is well established that a wide range of drugs of abuse acutely boost the signaling of the sympathetic nervous system and the hypothalamic–pituitary–adrenal (HPA) axis, where norepinephrine and epinephrine are major output molecules. This stimulatory effect is accompanied by such symptoms as elevated heart rate and blood pressure, more rapid breathing, increased body temperature and sweating, and pupillary dilation, as well as the intoxicating or euphoric subjective properties of the drug. While many drugs of abuse are thought to achieve their intoxicating effects by modulating the monoaminergic neurotransmitter systems (i.e., serotonin, norepinephrine, dopamine) by binding to these receptors or otherwise affecting their synaptic signaling, this paper puts forth the hypothesis that many of these drugs are actually acutely converted to catecholamines (dopamine, norepinephrine, epinephrine) in vivo, in addition to transformation to their known metabolites. In this manner, a range of stimulants, opioids, and psychedelics (as well as alcohol) may partially achieve their intoxicating properties, as well as side effects, due to this putative transformation to catecholamines. If this hypothesis is correct, it would alter our understanding of the basic biosynthetic pathways for generating these important signaling molecules, while also modifying our view of the neural substrates underlying substance abuse and dependence, including psychological stress-induced relapse. Importantly, there is a direct way to test the overarching hypothesis: administer (either centrally or peripherally) stable isotope versions of these drugs to model organisms such as rodents (or even to humans) and then use liquid chromatography-mass spectrometry to determine if the labeled drug is converted to labeled catecholamines in brain, blood plasma, or urine samples.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.