有机硅氧烷改性水性聚氨酯的合成

采用有机硅氧烷单体与聚醚、二羟甲基丙酸（DMPA）和甲苯二异氰酸酯（TDI）反应制备水性聚氨酯涂料。研究结果表明采用后添加有机硅氧烷单体的合成工艺，可制备贮存稳定好的水性聚氨酯乳液；凝胶渗透色谱（GPC）分析表明有机硅氧烷改性水性聚氨酯提高了聚氨酯的相对分子质量；性能测试表明有机硅氧烷改性水性聚氨酯涂料具有明显的优点：涂膜硬度高，耐沾污性、耐水性好和耐溶剂性好。     

纳米白炭黑的表面改性及其在氯丁橡胶中的应用

研究纳米白炭黑经硅烷偶联剂(Si-75)湿法改性后对氯丁橡胶抗疲劳性能的影响，并对改性剂的用量、改性工艺条件进行了优化。实验结果表明：适当改性后的纳米白炭黑可显著提高氯丁橡胶的抗撕裂和抗疲劳性能。     

Surface modification of a biomedical poly(ester)urethane by several low‐powered gas plasmas

Several low‐powered gas plasmas were employed to treat a biomedical poly(ester)urethane using the treatment gases of CO₂, O₂, NH₃, and SO₂ with different treatment time (2, 5, 10, and 15 min). The changes of the physical and chemical characteristics of the biopolymer surface were studied. Surface morphology was evaluated by scanning probe microscopy, which showed increased roughness of the surface after plasma treatment. The wettability of the surface was examined by static water contact angle (SCA) measurements, which presented that there was a decrease of SCA in all plasma treatments compared with the untreated surface and that each gas plasma had an optimum treatment time accompanied by a minimum contact angle. X‐ray photoelectron spectroscopy indicated the changes of the surface functional groups. The data demonstrated that CO₂ and O₂ plasmas resulted in the incorporation of oxygen‐containing groups, while NH₃ plasma resulted in the combination of nitrogen‐containing groups, and SO₂ plasma resulted in the formation of sulfur‐containing groups. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1273–1282, 2006     

过磷酸钙折流混合器的改进

由于绿原化工有限公司过磷酸钙装置生产能力由 6 70 t/ d(实物量 )提高到 84 0 t/ d,折流混合器负荷增大 ,出现折流环磨损加快等问题。采用若干技改措施 :扩大折流环内径、改变折流混合器喷射方向、采用新材料制作折流环 ,使折流混合器能满足 84 0 t/ d过磷酸钙生产的需要     

高速气流冲击式粉体表面改性装置——HYBRIDIZATION系统及应用

利用高速气流冲击法进行粉体/粉体系表面改性技术,是迄今为止各种粉体材料开发中最为引人注目的技术之一。HYBRIDIZATION(下称HYB)系统是利用高速气流冲击法对微粉体进行干式/机械化处理,是使材料复合化的最实用的装置,可对各类有机物、无机物、金属等进行广泛组合,通用性很强,适用于许多行业领域。从本文所述的系统构成、型式,有关的典型球形化处理的运转特性,利用复合化高温粉体测定被处理粉体表面温度,利用颜料改变色调等的处理特点及该系统的适用性等(一部分是从已发表的学术论文及专利上摘录的),可以说明HYB系统的概况。     

蛋白质化学修饰的研究进展

蛋白质分子具有极其复杂的结构层次，用化学修饰的方法研究蛋白质分子的结构与功能的关系一直是生物化学和分子生物学领域的热点。人们研究出许多小分子化学修饰剂并进行了多种类型的化学修饰。综述了蛋白质化学修饰领域的研究现状与水平，同时强调蛋白质的化学修饰是生化药物研究开发的重要手段之一。     

用预分解技术改造Φ4×60m预热器窑的又一成功实例

介绍南京水泥工业设计研究院用预分解生产技术对山东水泥厂Φ4×60m预热器窑烧成系统进行的成功技术改造。技改设计指标为：熟料产量保证指标1500t／d，争取指标1700t／d，熟料热耗＜3762kJ／kg，熟料28d抗压强度＞60MPa。整个工程停产施工耗时仅用48d，烧成系统技改共耗资约3000万元。技改后一次点火投料成功，且点火当月即实现72h达标考核，所有设计指标均达标。     

Styrene-butadiene branched star-shaped asphalt modifiers: Synthesis and mechanical characterization

Abstract

The synthesis and the corresponding characterization of styrene-butadiene (SB), branched, star-shaped copolymers was investigated as part of a research project on asphalt modification using polymers with precise molecular structures. The method of anionic polymerization was followed to prepare samples of block copolymers of SB, a synthesis method that controls chain-architecture, molecular weight distribution, monomer distribution, and the average molecular weight. The research studies are the synthesis of block copolymers including linear, three- and four-arms constructs, depending on the coupling agent used. The techniques of nuclear magnetic resonance (1NMR), differential scanning calorimetry (DSC), gel permeation chromatography (GPC), and rheology were carried out to characterize the copolymers. From the results of the 1NMR, DSC, and GPC analyses, all star-shaped copolymers investigated showed a similar block copolymer composition. Furthermore, the rheological behavior of one of the synthesized star-shaped copolymers was nearly the same as a four-branched commercial copolymer. Rheologically, the four-arm block copolymer sample had the largest storage modulus (G′) among the branched copolymers synthetized, indicating that such architecture produces a highly structured material. In regard to polymer-modified asphalt formulations, the three-branched copolymer architecture yielded better elastic behavior than the four-branch version. In summary, the findings of this investigation provide new insight about a polymer system that may offer advantages in industrial asphalt paving applications.     

我公司造气技术改造总结

针对原中氮流程造气存在的不足,借鉴小氮肥造气优点,对我公司造气系统的工艺、设备进行了大规模的技术改造,取得了明显的经济效益。     

超声辐照制备SrFeO3降解苯酚光催化性能研究

采用超声辐照柠檬酸络合法制备了复合氧化物SrFeO3，以苯酚为光催化探针分子，以450W高压汞灯为光源（主波长〉410nm），研究了SrFeO3光催化性能、研究表明，经过超声辐照制备的SrFeO3光催化活性提高一倍以上。XRD、TEM、DRS表征结果表明，超声辐照制备的SrFeO3粒径均匀、分散性好、粒径较小，光吸收红移显著。探讨了超声提高催化性能的机理。