二氧化钛光催化剂及在环境保护中的应用

文章介绍了纳米二氧化钛光催化剂催化机理,简要归纳了纳米二氧化钛光催化剂的制备方法,并概述了提高纳米二氧化钛光催化剂光催化性能几种主要方法和研究情况,并总结了其在污水处理、空气净化和其他环境保护相关领域的应用。     

纳米二氧化钛改性及其在涂料中的应用

简要介绍了纳米二氧化钛表面改性的常用方法,并综述了纳米二氧化钛在抗菌涂料、净化空气涂料、汽车面漆、耐老化涂料等方面的应用进展。     

500t/a金红石型纳米二氧化钛煅烧方案

简要介绍了以硫酸法钛白生产的中间产物硫酸氧钛为原料采用均匀沉淀法生产纳米二氧化钛过程中水洗和煅烧所存在的问题,并对工业化生产中采用旋流动态煅烧炉和旋转闪蒸干燥器组合煅烧金红石型纳米二氧化钛的方案作了详细介绍。     

纳米二氧化钛的现状与发展

介绍了目前纳米（超细）二氧化钛的几种基本制造方法，指出了二氧化钛的光催化性质、条件及原理，并且介绍了纳米二氧化钛的应用途径，主要是作为紫外光吸收剂、特殊颜料和化学催化剂使用。预测了未来10a纳米二氧化钛的生产消费情况。指出，到目前为止所有纳米（超细）粉体材料中，二氧化钛具有较好的光催化性质。     

纳米二氧化钛光催化材料研究新进展

纳米级TiO2作为一种光催化材料，在环境保护、光能转换、纺织建筑、工业催化等领域有着极为广泛的用途，其制备方法也得到了深入系统的研究。文章简要介绍了近年来纳米二氧化钛的制备方法、掺杂改性途径以及在卫生保健、废水处理、有机气体降解、新型材料制备等应用中的最新进展，并展望纳米二氧化钛今后的研究方向。     

纳米技术与纳米材料(Ⅴ)--防晒化妆品中的纳米二氧化钛

介绍了纳米二氧化钛屏蔽紫外线的原理；阐述了防晒化妆品中纳米二氧化钛应具备的特点和功能；详细讨论了国内外防晒领域的纳米二氧化钛的产品种类、发展趋势和研究方向。另外，就国内纳米二氧化钛规模化生产状况和应用现状论述了作者的观点。     

纳米二氧化钛的水热制备及光催化研究进展

纳米二氧化钛具有优异的光催化活性以及光电转化、光致发光特性。纳米二氧化钛的水热法制备具有独特的优势。重点介绍了纳米二氧化钛的3种晶体结构、水热法制备的过程机理,以及反应条件(原料、温度、pH等)对所得产物的影响,反应条件控制得当,可以获得具有一定晶型组成、尺寸和形状的纳米二氧化钛。介绍了纳米二氧化钛的光催化机理、晶体结构对光催化的影响,以及光催化性能的改进。根据光催化机理可以设计制备出具有分散性好、晶粒小、高比表面积、晶型可控的高催化活性的纳米二氧化钛,其在抗菌消毒、污水处理等方面具有很高的应用价值和良好的发展前景。     

超微细粉体材料二氧化钛的开发和应用

介绍了超微细二氧化钛的制备方法，对气相法和液相法合成纳米级二氧化钛的优缺点进行了比较，介绍了改性二氧化钛的表面处理方法及应用，建议我国应尽快开发纳米级二氧化钛生产工艺。     

纳米TiO2光催化剂在污水处理中的应用

纳米二氧化钛作为一种重要的光催化材料,由于具有化学性质稳定、便宜、无毒并具有较高活性等优点而得到了广泛的研究与应用。论文在综合分析相关文献的基础上,概述了二氧化钛光催化剂在污水处理中的应用,介绍了纳米二氧化钛在光催化处理污水方面的成果和研究进展,探讨了纳米二氧化钛工业应用的研究方向。     

纳米二氧化钛的制备与应用

本文详细介绍了纳米二氧化钛光催化材料的作用和基本特性。介绍了纳米二氧化钛超亲水性原理及应用方面的分类。对纳米二氧化钛的基本制备方法和应用进行了探讨。总结了光催化材料在实用技术和应用方面存在的问题,并对其今后的发展方向进行了前景展望。     

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.     

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.     

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。