CaC03纳米粉填充环氧树脂分散技术研究

探讨了CaCO3纳米粉填充环氧树脂的均匀分散技术。采用超声波振动和对CaCO3纳米粉进行硅烷偶联处理两种方法，改进CaCO3在环氧树脂中的分散效果。扫描电镜观察表明，以上两种方法比普通搅拌混合效果显著，实现了CaCO3纳米粉在环氧树脂中的均匀分散。     

电刷镀纳米Al2O3／Ni复合镀层表面形貌及接触疲劳寿命研究

将复合电刷镀技术和纳米材料有机结合，成功制备了镍基含纳米Al2O3陶瓷粉的电刷镀复合镀层。研究复合镀层的微观表面形貌、硬度、抗接触疲劳寿命等性能，分析了纳米粉处理方法、纳米粉浓度等工艺参数对复合镀层性能的影响，并对这些影响因素进行优化。     

硝酸盐修饰TiO_2纳米粉的制备及光催化降解亚甲基蓝

采用水热法制备了TiO_2纳米粉以及用硝酸盐(硝酸镁、硝酸钙和硝酸锶)对TiO_2纳米粉进行表面修饰,采用XRD和SEM对其物相和形貌进行表征。将制备的硝酸盐修饰的TiO_2纳米粉用来降解亚甲基蓝。结果表明,硝酸盐修饰的TiO_2纳米粉对亚甲基蓝的降解率都有很大的提高。当硝酸盐的掺杂比例为0.75%时,对亚甲基蓝的降解率达到最大,硝酸镁、硝酸钙和硝酸锶修饰的TiO_2纳米粉的降解率分别是88%、87%和85%,而纯TiO_2纳米粉的降解率只有65%,最大提高了35%。     

CaCO3纳米粉填充环氧树脂分散技术研究

本文对CaCO3纳米填充环氧树脂的均匀分散技术进行了探讨。采用超声波振动和对CaCO3纳米粉进行硅烷偶联处理两种方法改进CaCO3在环氧树脂中的分散效果。扫描电镜观察表明，以上两种方法比普通搅拌混合效果显著，实现了CaCO3纳米粉在环氧树脂中的均匀分散。     

纳米复合TZP陶瓷模具的研制

在3Y－TZP微粉中加入少量3Y－TZP纳米粉，可以制造出高强度，高硬度陶瓷模具，烧成温度可以降低80℃，抗折强度提高30％，3Y－TZP纳米粉通过控制ZrO2晶粒尺寸而使其产生相变增强。     

CaCO3纳米粉填充环氧树脂分散技术研究

探讨了CaCO3纳米粉填充环氧树脂的均匀分散技术。采用超声波振动和对CaCO3纳米粉进行硅烷偶联处理两种方法,改进CaCO3在环氧树脂中的分散效果。扫描电镜观察表明,以上两种方法比普通搅拌混合效果显著,实现了CaCO3纳米粉在环氧树脂中的均匀分散。     

CaCO_3纳米粉填充环氧树脂分散技术研究

对CaCO3 纳米粉填充环氧树脂的均匀分散技术进行了探讨。采用超声波振动和对CaCO3纳米粉进行硅烷偶联处理两种方法改进CaCO3 在环氧树脂中的分散效果。扫描电镜观察表明 ,以上两种方法比普通搅拌混合效果显著 ,实现了CaCO3 纳米粉在环氧树脂中的均匀分散。     

纳米粉对隧道混凝土抗裂防渗性能的影响

在隧道用水泥混凝土中添加α-Al2O3纳米粉,分析纳米粉对混凝土的力学性能、收缩性、早期抗裂性和抗渗性的影响.结果 表明:纳米α-Al2O3的添加有利于提高混凝土的抗压强度和抗折强度,适宜的掺量范围为2％～2.5％;纳米粉提高了混凝土的早期收缩值,并且在一定范围内随着纳米粉掺量的增加收缩值增加,当纳米粉掺量增加到一定程度混凝土干缩率减小;适宜的纳米粉掺量有利于提高混凝土的早期抗裂性;纳米α-Al2O3粉的掺入可以显著提高混凝土的抗渗性.     

YAG纳米粉的研制进展

综述了YAG纳米粉的研究现状,着重介绍了7种合成YAG纳米粉的方法,其中常用的是固相法、溶胶.凝胶法、沉淀法、水(溶剂)热法.     

合成莫来石纳米粉的红外吸收光谱研究

采用溶胶（ｓｏｌ）－凝胶（ｇｅｌ）－超临界流体干燥（ｓｕｐｅｒｃｒｉｔｉｃａｌ ｆｌｕｉｄ ｄｒｙｉｎｇ）ＳＣＦＤ法合成了莫来石纳米粉，并利用红外吸收光谱（ＩＲ）对其溶胶、凝胶及超细粉的结构组成进行了定性分析，结合Ｘ射线衍射分析（ＸＢＤ）和透射电子显微镜分析（ＴＥＭ）技术初步探讨了莫来石纳米粉的合成机理。     

乙烯酮(双乙烯酮)下游产品废水的治理技术

乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。     

我国聚碳酸酯工业发展概况

介绍我国聚碳酸酯生产能力和消费需求,对聚碳酸酯在信息工业中的应用作了简短介绍     

Semi-empirical equation of state of metals. Equation of state of aluminum

A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO₂) of density 0.08 g/cm³. __________ Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008.     

水泥水化热测定方法综述

水泥水化热是中、低热水泥和核电工程用水泥的一项关键的技术指标。全球范围内测定水泥水化热的方法有溶解法、直接法/半绝热法、等温传导量热法三种。本文总结了中、美、欧相关方法标准,对其测试原理、仪器设备、试验过程等方面进行了比对,并对其在领域的应用做了简单的概括。     

Effect of degree of deacetylation of chitosan on the kinetics of ultrasonic degradation of chitosan

The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003     

Calorimetric and Computational Study of Enthalpy of Formation of Diperoxide of Cyclohexanone

A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out.     

气化给煤系统故障分析

气化给煤装置自投运以来,出现了气化煤仓堵煤、称重给煤机输送皮带因跑偏而损伤以及清扫装置故障频繁等问题,多次造成气化系统减负荷运行。通过对出现的各种问题进行分析,找到了产生这些问题的原因,并有针对性地采用配煤和改进清扫链等措施,使出现的问题得到了极大的改善。     

船舶柴油机涡轮增压器的清洗

采用喷射清洗剂的方法，清洗涡轮叶片积炭。     

醋酸纤维素取代基分布与性质的关系

分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。     

Generalization of vdW type of equations of state

1 INTRODUCTIONBecause of importance of equations of state (EOS)in science and industry,hundreds forms of EOS havebeen presented since latter 19th century.It seems impossible to develop a general equation covering vari-ous kinds of EOS.But for cubic EOS,several generalequations have been reported already. Martin presented the first general equation whichis following p=RT/V-α(T)/(υ β)(υ γ) δ(T)/υ(υ β)(υ γ) (1) Kumar et a1.presented an equation called the most general form of a density-cubic or, alterna tively,volume-cubic mathematical equation,the form of which is as follows