碱减量处理对涤纶织物性能的影响

利用浓度为20%氢氧化钠溶液,在温度为85℃时,对涤纶织物进行不同时间的碱减量处理,研究其处理后机械性能和亲水性能的变化.实验表明：涤纶织物的失重率在5%左右时,强力损失为7.3%,亲水性能最佳。     

废棉布制备高粘度羧甲基纤维素

为纺织废料的再利用,本文以废棉布为原料制备高粘度羧甲基纤维,采用碱醚同釜法及正交实验,通过测试粘度得到最佳反应条件为:浴比为1∶3,氢氧化钠质量分数为30%,氯乙酸乙醇质量分数为30%,醚化时间为2 h,碱化时间为2 h,碱化温度为35~40℃,醚化初期温度为40~45℃,后期温度为70℃,羧甲基纤维素的的粘度值为932.6mPa.s。     

多功能节能高效洗涤组合橱柜的设计

该产品是集洗涤、烘干、消毒、循环水再利用于一体的多功能组合橱柜,具有空间小,功能全,成本低,结构简单,操作方便,节能环保等特点.     

涤纶仿真丝面料的开发及其服用性能探讨

采用83.3 dtex/72f涤纶三叶有光丝制成仿真丝面料,对面料进行碱减量处理和低温等离子处理,并对面料服用性能进行了测试.结果表明经过低温等离子处理的涤纶仿真丝面料具有良好的抗皱性、吸湿透气性和染色性能,具有超真丝的效果.     

碱体系中系列羟基苯基卟啉红外光谱和拉曼光谱性质研究

本文继续深入研究该体系中相关物质的红外光谱和拉曼光谱的性质.论文结果说明,在碱体系中,NaOH只与羟基苯基卟啉周边meso-位的羟基反应形成盐,这个性质与紫外可见光谱性质是一致的.同时这一结果也为研究卟啉与金属的相互作用提供了有益的理论支持.     

碱处理棉纤维结构及其在LiCi/DMAc中的溶解特性

采用NaOH溶液对棉纤维进行处理.通过X射线衍射研究了不同碱处理条件下棉纤维的晶面结构变化,表征了棉纤维的结晶度和晶粒尺寸.考察了碱处理棉纤维在LiCl/DMAc中的溶解性和溶解稳定性.结果表明碱处理后,棉纤维的晶面结构明显变化,棉纤维衍射峰发生明显的变化,结晶度和晶粒尺寸也有变化,且随碱的质量分数的变化非常明显,而处...     

Sulfur-Tolerant NOx Storage Traps: An Infrared and Thermodynamic Study of the Reactions of Alkali and Alkaline-Earth Metal Sulfates

The sulfur tolerance of a barium-containing NO_x storage/reduction trap was investigated using infrared analysis. It was confirmed that barium carbonate could be replaced by barium sulfate by reaction with low concentrations of sulfur dioxide (50 ppm) in the presence of large concentrations of carbon dioxide (10%) at temperatures up to 700 °C. These sulfates could at least be partially removed by switching to hydrogen-rich conditions at elevated temperatures. Thermodynamic calculations were used to evaluate the effects of gas composition and temperature on the various reactions of barium sulfate and carbonate under oxidizing and reducing conditions. These calculations clearly showed that if, under a hydrogen-rich atmosphere, carbon dioxide is included as a reactant and barium carbonate as a product then barium sulfate can be removed by reaction with carbon dioxide at a much lower temperature than is possible by decomposition to barium oxide. It was also found that if hydrogen sulfide was included as a product of decomposition of barium sulfate instead of sulfur dioxide then the temperature of reaction could be significantly lowered. Similar calculations were conducted using a selection of other alkaline-earth and alkali metals. In this case calculations were simulated in a gas mixture containing carbon monoxide, hydrogen and carbon dioxide with partial pressures similar to those encountered in real exhausts during switches to rich conditions. The results indicated that there are metals such as lithium and strontium with less stable sulfates than barium, which may also possess sufficient NO_x storage capacity to give sulfur-tolerant NO_x traps.     

可视化模拟在燃烧器中的应用

以相似理论为基础,对KBN双通道燃烧器出口湍流场进行了研究,通过因次分析得到了可视化模拟的相似准则。并采用了酸碱水模拟可视化方法,对出口燃烧影响比较大的燃料和燃烧空气的混合情况进行了可视化模拟,验证了所得到的可视化模拟条件的正确性。     

单组分中温固化耐碱胶黏剂的研制

从解决潜伏性中温固化和耐碱性问题入手，合成了新型促进剂，并选用具有耐碱化学结构的主体材料成分，配制出性能优良的单组分糊状胶黏剂并研究了其耐碱性、固化工艺、黏度变化和贮存期。采用双酚A环氧为主体树脂，以合成的韧性环氧进行增韧，以超细双氰胺为固化剂，以合成的混合胺的脲类衍生物为潜伏性固化促进剂，以气相SiO2调节触变性，制备出的单组分中温固化环氧胶黏剂具有良好粘接性能和稳定的分散性，其室温剪切强度（铝／铝）达28MPa，90℃剪切强度25MPa，用于橡胶粘接达到橡胶破坏。该胶体现出良好的耐碱性、耐湿热老化性能和较长的贮存期（室温一个月以上）。     

氟硅酸溶液中氟硅酸及氢氟酸含量的测定

基于生成氟硅酸钾沉淀和该沉淀水解均析出不同量酸，用碱滴定完成氟硅酸及氢氟酸的连续测定。该方法用于生产实践，结果令人满意。