从四氢呋喃、甲醇、水三元混合物系中分离四氢呋喃的研究

叙述了以液—液萃取、间歇精馏为手段，从四氢呋喃、甲醇、水三元混合物系中分离四氢呋喃的方法。四氢呋喃纯度超过９８％，收率６４．８％。     

聚磷酸铵的研究进展

聚磷酸铵(APP)是一种重要的无机阻燃剂，是膨胀型阻燃剂的主要成分之一。介绍了Ⅰ-型和Ⅱ-型聚磷酸铵的结构、性质，着重讨论了Ⅰ-型和Ⅱ-型聚磷酸铵的合成方法、改性途径的研究新进展，以及Ⅰ-型聚磷酸铵到Ⅱ-型聚磷酸铵的转化机理、转化方法。研究目的在于制备难溶于水的聚磷酸铵。     

Hyperbola-Logistic叠加模型预测地基沉降

针对Hyperbola模型和Logistic模型的优缺点,提出Hyperbola-Logistic叠加模型,该叠加模型综合了两种单项预测模型的优点,以期达到高精度的预测结果。结合发电厂地基沉降现场观测数据,利用Hyperbola-Logistic叠加模型预测地基沉降,并与单项沉降预测模型的拟合结果进行比较分析。结果表明:与两种单项预测模型的预测结果相比较,叠加模型减小了系统误差,提高了整体的预测精度,拟合结果可靠,适用于发电厂地基沉降量的预测。新模型具有一定的适用性,是一种分析预测地基沉降的有效方法。     

Binder effect on cycling performance of silicon/carbon composite anodes for lithium ion batteries

The cycling performance of a silicon/carbon composite anode has been significantly enhanced by using acrylic adhesive and modified acrylic adhesive as binder to fabricate the electrodes for lithium ion batteries. The capacity retentions of Si/C composite electrodes bound by acrylic adhesive and modified acrylic adhesive are 79% and 90% after 50 cycles, respectively. These two binders are electrochemically stable in the organic electrolyte in the working window. They also show larger adhesion strength between the coating and the Cu current collector as well as smaller solvent absorption in the electrolyte solvent than polyvinylidene fluoride (PVDF). Furthermore, sodium carboxyl methyl cellulose (CMC) plays an important role on improving the properties of acrylic adhesive, which increases the adhesive strength of acrylic adhesive and improves the activation of the electrodes.     

用瞬时法测定液体导热系数

以珠状热敏电阻为加热元件,建立了用瞬时法测定液体导热系数的装置,在25℃下用乙二醇等7个标准样品,对该装置进行了标定,平均偏差为2%.为了核实装置和所得关系式的可靠性,又测定了13个已知导热系数的样品,多数偏差在2%以内,最大偏差为5%.单次测量的精度为0.2%.本文叙述了这一方法的原理,并对实验结果进行了讨论.     

Eddy characteristics on mass transfer close to free interface

The velocity fluctuations in the immediate vicinity of a free interface were measured with a hot film anemometer. And mass transfer rates and eddy exposure times were analyzed by using the method of deterministic approach. These mass transfer rates were compared with the mass transfer rates by means of concentration measurements in the air-water system. The eddy exposure time distributions obtained from velocity data were skewed toward the lower time value. The contribution of eddies wi:h small exposure time was increased as the liquid became more turbulent. The mass transfer rates were mainly contributed by the Prandtl size eddies and even larger eddies. The mass transfer predictions by the single eddy model employing a deterministic method were in good agreement with the experimental results by independent measurements of concentration.     

电镀综合废水处理技术

电镀行业普遍存在废水处理不够彻底的排放问题。针对这种现状，本文提出首先必须对生产线上的电镀废液进行种类及清污分流，并应用化学絮凝—气浮法一体化的处理技术对综合废水进行处理。试运行情况表明，该处理技术易于控制、占地面积小、运行费用低，处理后的废水可以达到GB8978—1996二级标准，去除率在96％以上，并有65％以上的处理水可以回收利用。     

[(2Y-ZrO2)-Al2O3]纳米微粉制备的研究

本研究采用SoL-GeL法和自动引燃法制备[(2Y-ZrO)-AlO]超微粉,并进行了微观结构分析。为比对223两种超微粉性能的差异,采用注浆成型法制备样品,并分别测定抗折强度,断裂韧性和烧结温度。结果表明:自动引燃制备的ZrO-AlO掺稀土纳米微粉,工艺简单、细小均匀,由其烧造的样品较SoL-GeL法样品抗弯强度高,223断裂韧性好,烧结温度低。     

超高分子量聚乙烯纤维/有机玻璃复合材料摩擦磨损性能研究

用真空浸渍法成功制备出了超高分子量聚乙烯纤维／有机玻璃(UHMWPE／PMMA)复合材料，并对基体材料PMMA，单向超高分子量聚乙烯纤雏／有机玻璃复合材料以及三维编织超高分子量聚乙烯纤维／有机玻璃(即UHMWPE3D／PMMA)复合材料的摩擦磨损性能进行了研究。实验证明UHMWPE／PMMA复合材料具有优良的摩擦磨损性能。经过纤维增强的复合材料的摩擦磨损性能优于基体材料，三维编织纤维增强的复合材料其磨损远小于单向纤维增强的复合材料，但其摩擦系数没有显著变化。     

工业废渣磷石膏用作充填材料的研究

研制了以工业废渣磷石膏为基材的充填材料.改性后磷石膏的耐水性大大增强,抗压强度≥0.79 MPa、渗透系数≤1×10-5cm.s-1,并且具有合适的C、Φ值.