软起动的介绍及应用

从软起动的定义着手,指出了电机直接起动的要求及危害,介绍了软起动的工作原理、控制方式及技术特点,结合软起动的应用条件,通过计算验证了起动过程电压下降满足设计规范的要求,阐述了软起动的调试及同步电机软起的起动过程。总结列出了常见故障现象及处理方法,最后从运行的角度分析了应用效果及注意事项。     

气辅外门拉手用PC/PBT合金材料研究

介绍了动力锂离子电池对隔膜的性能要求,分析了现有的聚烯烃隔膜的特点及缺陷,并综述了目前各类型动力锂离子电池隔膜的研究成果,讨论了改性聚烯烃隔膜、改性无纺布隔膜及其他隔膜的特点及应用情况。另外,指出了安全性及均一性是动力锂离子电池隔膜的最基本要求及关键性能。     

纳米技术、纳米材料及其在纺织工业上的应用

概述了纳米技术的起源及发展,介绍了纳米材料的结构及性质,对其在高分子复合材料及纺织工业上的应用进行了综述。     

甲基磺酸盐在锡及锡基合金镀层中的应用现状

介绍了甲基磺酸(MSA)盐镀液体系的特点。分析了电镀锡及可焊性锡合金镀液的主要成分及特点,介绍了MSA体系在电镀锡钢板中的应用。对比了电镀无铅镀层和Sn–Pb合金镀层的性能,给出了电镀及化学镀锡及锡基合金的工艺配方及操作条件。     

新型卟啉化合物的合成应用新进展

简要介绍了卟啉类化合物的结构特征、性质及应用;重点综述了新型卟啉化合物及金属配合物的合成及应用;新型卟啉衍生物的合成及选择性识别;新型卟啉衍生物的合成及在光学方面的应用。并对卟啉化学的发展进行了展望。     

结晶及沉淀过程中粒子聚结与团聚的研究进展

粒子聚结及团聚是结晶及沉淀过程中重要的二次动力学过程,对最终产品的晶形、粒度分布及纯度影响较大。综述了粒子聚结及团聚过程的机理及其影响因素,讨论了有关数学模型的研究进展,并对聚结与团聚的研究方向进行了展望。     

铜及铜合金的化学抛光工艺改进

本文介绍了改进的铜及铜合金化学抛光工艺,简介了该工艺的流程,化学抛光液和脱膜液的配方及工艺条件,还分析了硝酸及过氧化氢浓度、乙醇及LC添加剂、抛光时间及搅拌速度等对该工艺的影响。     

国外氯乙酸的生产及市场分析

概述了国外氯乙酸的生产情况、消费结构及商情,提供了国外主要生产厂家及生产规模,阐述了氯乙酸用途及工业开发前景。     

冠醚化合物合成应用研究的新进展

简要介绍了冠醚化合物的结构特征及应用，重点综述了新型冠醚的合成及选择性组装键合作用、新型冠醚衍生物的合成及应用、特殊结构冠醚的合成及应用，并对冠醚化学的发展进行了展望。     

重烷基苯在润滑油添加剂中的应用

介绍了国内烷基苯及重烷基苯的生产技术及生产能力、重烷基苯的组成,分析了国内外润滑油添加剂的生产厂家、生产状况及市场需求,探讨了重烷基苯制取重烷基苯磺,酸重烷基苯磺酸在润滑油添加剂生产中的应用及发展方向.     

间十五烷基酚在正庚烷中密度和粘度的测定和关联

实验测定了温度为283．15～308．15 K条件下间十五烷基酚与正庚烷形成的二元体系的密度和粘度。通过拟合,得到了准确的模型参数,同时计算了测定值和计算值之间的误差。结果证明,数据和模型拟合效果良好, VTF方程的标准方差是0．78％,数据和模型对于间十五烷基酚分离提纯的工程设计非常有用。     

Preparation and surface-active properties of the sodium soaps,mono- and diethanolamides and diol and triol sulfates of cycloaliphatic C21 Di- and C22 Tricarboxylic acids

Cycloaliphatic C₂₁ di- and C₂₂ tricarboxylic acids were prepared by the Diels-Alder reaction of dehydrated castor oil (DCO) fatty acids (containing 48% conjugated and 42% nonconjugated dienes) with acrylic and fumaric acids, respectively. The reaction temperature, time, catalyst concentration, and mole ratio of reactants were varied to get maximum yields of the di- and tricarboxylic acids. The unreacted DCO fatty acids were removed from the products by partition between aqueous methanol and n-hexane. The products were converted to methyl esters and characterized as the substituted cyclohexene derivatives before and after dehydrogenation with Pd/C in xylene, hydrogenation with Pd/C in decalin and oxidation with periodate-permanganate reagent and by mass and proton nuclear magnetic resonance spectrometry. The acids were converted to sodium soaps, mono- and diethanolamides and the corresponding diol and triol sulfates, and the resulting products were evaluated for their surface-active properties. The sodium soaps showed better calcium tolerance and poorer foaming power than sodium oleate. The diethanolamides were inferior to lauroyl diethanolamide in wetting and emulsifying power. The monoethanolamides were better than the respective diethanolamides and lauroyl diethanolamide in wetting property. The diol and triol sulfates were poorer in wetting and emulsifying ability and better in calcium tolerance than sodium lauryl sulfate.     

苯并呋喃噻吩(吲哚)二酮染料的合成及其光谱性能

本文合成了对溴苦杏仁酸、对甲基苦杏仁酸、对甲氧基苦杏仁酸和对巯基苯酚，用这4个中问体合成了4只苯并呋喃噻吩二酮染料和4只苯并呋喃吲哚二酮染料。经质谱鉴定，分子离子峰和碎片峰与结构一致。初步探讨了这些染料的光谱性能。     

Tetraalkynylated and Tetraalkenylated Benzenes and Pyridines: Synthesis and Photophysical Properties

Tetra(arylalkynyl)pyridines and tetra(arylalkenyl)pyridines and their benzene analogues were prepared by palladium‐catalyzed cross‐coupling reactions from the commercially available chlorinated substrates in good to excellent yields. The photophysical properties of selected compounds were investigated and compared to each other. Very good fluorescence quantum yields were observed, especially for the pyridine derivatives.     

微米、纳米SiC表面涂覆、改性的方法及研究现状

介绍了微米、纳米SiC表面涂覆、改性的实验方法,探讨了各种方法的特点.从微米、纳米SiC的三种不同形态入手,详细介绍了微米、纳米SiC的表面涂覆、改性的研究进展,并对微米、纳米SiC表面涂覆、改性技术给出了简要评价.     

PCT及其共聚酯的开发概况及应用

简述了PCT及其改性聚酯的工艺原理,综述了有关PCT及其共聚酯的开发现状和研究概况,并指出其应用领域。     

Flexible and conducting composites of polypyrrole and polydimethylsiloxane

Conductive and flexible polydimethylsiloxane (PDMS)/polypyrrole (PPy) composites were synthesized electrochemically. Electrochemical syntheses were performed at +1.10 V by using p‐toluene sulfonic acid (PTSA) as supporting electrolyte and water as solvent. Composites were characterized by cyclic voltammetry, thermogravimetric analysis, differential scanning calorimetry, scanning electron microscopy, and Fourier transform infrared spectroscopy. Conductivity measurements and mechanical tests were also performed. The observed conductivities were in the range of 3.5–7.6 S/cm, indicating that the conductivities of PDMS/PPy composites and that of pure PPy were in the same order of magnitude. Tensile tests revealed that higher percent elongation was obtained by the addition of PDMS. Highly flexible and foldable PDMS/PPy composites were successfully synthesized, which have high conductivities and improved mechanical properties. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 736–741, 2004     

乙草胺在甘蔗和土壤中的残留分析及消解动态

采用GC-μECD法测定了乙草胺在甘蔗植株、茎秆及土壤中的消解动态和最终残留。样品用乙腈提取,PSA和碳纳米管净化。结果表明:当乙草胺在植株、茎秆和土壤中的添加浓度在0.005~0.5 mg/kg时,添加回收率分别为84.84%~95.54%、81.96%~99.40%和80.91%~95.70%,相对标准偏差分别为1.67%~5.20%、1.75%~5.50%和1.11%~2.24%。乙草胺在植株和土壤中的半衰期分别为2.7~3.2 d和8.0~8.7 d。乙草胺在甘蔗植株、茎秆和土壤中的最终残留量分别为0.005 mg/kg、0.005 mg/kg和0.010~0.099 mg/kg。     

毒死蜱、联苯菊酯在室内和室外土壤中的消解动态及土壤化学屏障研究

[目的]探讨毒死蜱和联苯菊酯在室内外土壤中的消解动态,并预测2种农药作为土壤化学屏障防治白蚁的有效期。[方法]采用气相色谱法测定不同时期土壤中毒死蜱和联苯菊酯的残留量并采用土壤穿透法测定2种农药在土壤中的生物活性。[结果]毒死蜱在室内和室外的半衰期分别为51.3、39.5 d,联苯菊酯在室内和室外的半衰期分别为31.3、44.5 d。毒死蜱和联苯菊酯抗白蚁穿透的最低有效质量分数分别为6.15、5.78 mg/kg,并结合消解动态方程预测出毒死蜱和联苯菊酯作为土壤化学屏障中有效成分的有效期在室内分别为195、29.1 d,在室外则分别为158.4、56.1 d。[结论]得到的白蚁防治有效期结果较好,为白蚁的化学防治提供理论依据。     

无机及分析化学课程教学改革与实践

结合无机及分析化学课程的内容和特点,介绍了无机及分析化学课程教学改革的一些新举措,取得了良好的效果。主要研究内容和成果有:优化教学内容,选择合适的教材,合理安排教学进度;改进课堂教学方法和手段,将传统教学方式与多媒体教学相结合;理论与实验教学相结合,加深学生对理论知识的理解,培养学生的研究能力和创新意识。