晓星化纤与北院开展技术交流与合作

2007年10月19日,晓星化纤(嘉兴)有限公司总经理黄正模一行专程来京,与北京橡胶工业研究设计院就双方可能开展的合作领域进行交流和探讨.北院院长徐耀先对韩国客人的到来表示欢迎,并详细介绍了北院目前的整体情况和长期以来积累的技术及产业化成果与优势.晓星公司介绍了其纤维帘线和钢丝帘线方面的技术优势和产品研发情况.双方就所关心的产品和应用问题进行了充分沟通,并对未来可能开展的PEN帘布和Lyocell等应用研究项目充满了信心.     

材料科学与工程专业课程体系教学改革与实践

探讨了材料科学与工程专业的人才培养规格和知识结构,在此基础上确立了该专业理论教学和实践教学改革方案,建立了产学研"教学全过程"的人才培养模式,提出科研育人的思想,并依此制定教学计划和教学大纲,培养受行业欢迎的毕业生。     

地表水电导率与水质指标相关性分析与建模

分析珠江某断面2020-2021年的各项水质指标数据,通过Pearson系数分析得出电导率与总氮和氟化物之间存在着极显著正相关性。基于电导率和总氮、氟化物的拟合结果可知,相比线性和幂次式,二次项的拟合结果最优,并且综合模型验证结果来说,以电导率为因变量,总氮和氟化物为自变量得出最优模型为y=11.14+4.18x+0.634x²和y=23.70+17.44x+57.55x²,以此模型可以高效、低成本在线监测估算出城市水系中总氮和氟化物指标。     

回眸与展望流态化科学与技术

流态化作为一门具有科学内涵的学科始于20世纪40年代,但对于尚没有流态化命题下应用流态化技术的生活和生产活动,如淘米和扬谷,早已存在。此类活动的文字记载出现于16世纪。近代流态化理论以郭慕孙提出的广义流态化理论和无气泡气固接触理论以及Davidson提出的气泡理论为代表,而近代流态化技术的工业应用则以煤的气化和石油的催化裂化为代表。当前流态化的理论研究主要集中于流化床内由不同尺度的颗粒、液滴、气泡、聚团的时空不均匀分布所形成的不均匀结构的预测与优化调控理论与方法的研究,不均匀结构与传递和反应的关系理论的研究以及流态化床的计算机模拟与放大研究。当前流态化技术的工业应用范围已涵盖化工、冶金、能源、材料、环境等领域。在我国,由于经济快速发展,流态化技术应用尤为活跃。采用由流化床局部构效关系模型与两流体模型相结合的计算机模拟方法是解决流态化反应器过程优化调控和设备放大问题的有效途径。该方法面临许多挑战,需要付出艰苦的努力。目前中国工业正处于调整产业结构,淘汰落后产能,实现节能减排、清洁生产的转型期。在许多工业流程中,用高效节能的流态化床反应器替代低效高能耗的回转窑、固定床、移动床反应器正逢其时。     

政策与法规

商务部终裁乙二醇和二甘醇的单丁醚反倾销商务部发布2013年第5号公告,最终裁定原产于美国和欧盟的进口乙二醇和二甘醇的单丁醚存在倾销,自2013年1月28日起征收反倾销税,实施期限为5a。乙二醇和二甘醇的单丁醚是广泛应用于水性涂料中的溶剂,也是硝化纤维素、醇酸树脂和用顺酐改性的酚醛树脂的溶剂,一般用作涂料特别是硝基喷漆,可以防雾、防皱,提     

大学化学实验课程体系与内容的改革与实践

我院以全面培养学生的创新精神和实践能力为目标,对大学化学实验课程体系与内容进行全面的改革,科学地设置实验项目,形成适应学科特点及自身系统性和科学性的课程体系。规范基础技能训练型实验,增加综合性、设计性实验,鼓励创新性实验,使学生较全面地了解和掌握化学实验的基本理论和基本技能。     

互动与对比相结合强化传热与吸收的教学

通过互动与对比相结合的教学方式,在复习课中对《化工原理》课程中传热和吸收的异同点进行比较和概括总结,大大加深了学生对传热和吸收基本概念的理解和掌握程度,并提高了学生分析和解决问题的能力和对《化工原理》课程学习的积极性和主动性,还能创造良好的教学气氛。     

试论化学农药与生物农药的内涵与外延

化学农药与对应生物农药之间存在一定区别与联系,因为生物农药在发展的整个过程中为后续化学农药研制与开发奠定了有力基础,之后在此背景下为其进行定量资源供给。以生物资源开发为蓝本的化学农药研制,突破了之前传统生物农药的消极束缚,从化学农药角度和生物农药角度进行详细分析和阐述,确定高效农药研发和安全农药研发以及经济农药研发才是制胜之本。     

PVA与淀粉薄膜的研究进展与应用

介绍了聚乙烯醇(PVA)和淀粉多羟基、多氢键、高结晶等结构特点,以及根据此开发的可塑化方法和水溶性薄膜生产方法,包括最新的PVA薄膜一步熔融挤出法。PVA和淀粉水溶性薄膜熔融挤出法的难点在于均要破坏结晶结构,达到可塑化,前者主要是要获得增塑凝胶化可自由流动粒子,后者在于糊化处理。     

浅析书法与陶瓷艺术相承与发展

书法与陶瓷艺术在中国历史长河中有着悠久的渊源,陶瓷与书法的综合艺术是有广阔的发展空间和美好的前途。把陶瓷艺术和书法艺术融为一体的风格,实在值得令人关注和投入应用。     

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.     

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.     

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。     

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.     

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.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.