聚苯胺包覆玻璃鳞片复合物的制备与表征

采用化学聚合和乳液聚合两种方法制备聚苯胺包覆玻璃鳞片复合物。通过XRD、红外光谱、SEM、表面接触角测试、电导率测试、EIS等手段对复合材料的结构、形貌和性能进行了表征。结果表明:不同方法制备的聚苯胺包覆玻璃鳞片复合材料在结构、微观形貌和电导率上有较大差别,其中乳液法制备的复合材料,聚苯胺在玻璃鳞片载体上能够生长成较长的纤维,具有较高的结晶度,电导率高达2.281 S/cm。最后以之为导电填料,制备环氧防腐导电涂料,经研究表明其具有优异的导静电、防腐性能和机械性能。     

聚苯胺/铬酸锶复合材料的制备及其环氧涂层防腐蚀行为研究

利用原位聚合的方法合成了不同质量比的聚苯胺/铬酸锶复合材料,使用扫描电镜(SEM)、透射电镜(TEM)、傅里叶变换红外光谱(FT-IR)和X射线衍射(XRD)对复合材料进行了表征,并在不锈钢片上制备了聚苯胺/铬酸锶复合材料的环氧涂层,利用电化学工作站和盐雾试验箱测试其防腐性能.测试结果表明:聚苯胺/铬酸锶复合材料的防腐效果优于聚苯胺,且当复合材料中聚苯胺与铬酸锶的质量比为1∶1时,防腐蚀性能最好,该复合材料环氧涂层的腐蚀电位较聚苯胺环氧涂层提高30 mV,腐蚀电流密度下降一半,降低成本的同时提高了其防腐性能.     

海洋环境防腐蚀玻璃鳞片涂料的研制

用中碱玻璃鳞片为主要防腐蚀颜料,制备了一种适用于海洋气候的高固含厚浆型环氧玻璃鳞片涂料,并且考察了不同玻璃鳞片及其用量、粒径对涂层耐介质性能的影响。结果发现选用偶联剂包覆较好的玻璃鳞片,粒径为300目,用量为20%~25%,最能发挥其阻隔屏蔽效应。并且针对海洋环境的特殊性,对比测试了环氧玻璃鳞片涂料和普通环氧涂料的耐阴极剥离性能。     

码头钢管桩重防腐涂料的应用

介绍了环氧粉末涂料、聚氨酯涂料、改性环氧玻璃鳞片涂料及聚酯玻璃鳞片涂料在码头钢管桩重防腐体系中的应用。     

环氧玻璃鳞片树脂技术在离子交换设备防腐蚀中的应用

对大庆石化公司热电厂离子交换设备用环氧玻璃树脂鳞片技术现场防腐的应用进行了介绍.采用新型环氧玻璃鳞片树脂技术解决了离子交换设备防腐蚀问题,经过16 a的实际运行表明,环氧玻璃鳞片防腐材料防腐效果较好,设备未出现腐蚀、泄漏情况.     

不同偶联剂对环氧/玻璃微珠复合材料性能的影响

采用KH550、KH560、KH570三种硅烷偶联剂对空心玻璃微珠进行处理,进而使用熔融共混法制备了环氧/玻璃微珠复合材料。运用红外分析手段证实硅烷偶联剂均已成功接枝到空心玻璃微珠表面,借助DSC-TG和万能材料试验机研究了偶联剂种类对环氧/玻璃微珠复合材料固化反应、热稳定性和力学性能的影响。对测试结果的分析表明,空心玻璃微珠的表面处理并未改变环氧与氰酸酯间的固化反应速度。经偶联剂表面改性后,制得的环氧/玻璃微珠复合材料的弯曲和压缩强度显著提高,不同硅烷偶联剂的改性效果不同,其中KH-570改性的综合效果最优。     

石墨烯-玻璃鳞片环氧复合涂料在油气储运防腐中的应用研究

探究油气储运防腐中使用石墨烯-玻璃鳞片环氧复合涂料的效果.选取40目玻璃鳞片与石墨烯结合起来,制备出加入不同含量玻璃鳞片的防腐蚀涂料.重点分析所制备的涂料附着力、表面形貌等指标情况.研究结果表明,在不同含量玻璃鳞片下,涂层和基体之间可以相互结合,涂层具有良好的附着力;通过720 h中性盐雾腐蚀后,涂层结构比较紧密、完整...     

高性能酚醛环氧玻璃鳞片涂料的制备及性能研究

为降低表面处理对环氧玻璃鳞片涂层性能的影响,提高涂层耐介质和防腐性能,探讨了酚醛环氧树脂种类、反应性稀释剂类型和用量、固化剂类型及复配用量以及玻璃鳞片用量对涂层干燥性能、抗渗透性能、低表面附着性能和长效防腐性能的影响.研究表明:以m(酚醛环氧树脂DEN431):m(腰果酚缩水甘油醚)=2:1为树脂体系,以m(脂环胺C)...     

低温快干环氧煤沥青玻璃鳞片涂料的研制

通过对比实验,确定了能在-5～5℃的温度条件固化成膜的环氧煤沥青玻璃鳞片涂料的配比,讨论了玻璃鳞片对涂膜防腐性能的影响及助剂对涂膜的影响。克服了环氧类涂料在低温条件下固化时间长甚至不能固化的缺点,使环氧煤沥青玻璃鳞片涂料在低温条件下能正常施工。     

防腐蚀涂料

201002107聚苯胺改性玻璃鳞片环氧重防腐涂料及其制备方法：CN101643615[中国发明专利申请公开]／中国：中国科学院金属研究所（刘福春等）．-2010．02．10．-200810012655．5（2008．08．06）：IPCC09D163／02     

Sapindaceae,cyanolipids, and bugs

Scentless plant bugs (Heteroptera: Rhopalidae) are so named because adults of the Serinethinae have vestigial metathoracic scent glands. Serinethines are seed predators of Sapindales, especially Sapindaceae that produce toxic cyanolipids. In two serinethine species whose ranges extend into the southern United States,Jadera haematoloma andJ. sanguinolenta, sequestration of host cyanolipids as glucosides renders these gregarious, aposematic insects unpalatable to a variety of predators. The blood glucoside profile and cyanogenesis ofJadera varies depending on the cyanolipid chemistry of hosts, and adults and larvae fed golden rain tree seeds (Koelreuteria paniculata) excrete the volatile lactone, 4-methyl-2(5H)-furanone, to which they are attracted.Jadera fed balloon vine seeds (Cardiospermum spp.) do not excrete the attractive lactone. Loss of the usual heteropteran defensive glands in serinethines may have coevolved with host specificity on toxic plants, and the orientation ofJadera to a volatile excretory product could be an adaptive response to save time.Mention of a commercial product does not consititute an endorsement by the USDA.     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

2008～2009年世界塑料工业进展

收集了2008年7月～2009年6月世界塑料工业的相关资料,介绍了2008～2009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、环氧树脂、不饱和聚酯树脂)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。     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.