Structural Performance and Characterization of Polyimide Doped Activated Carbon Fibers for Mercury Adsorption

Structure characteristics about activated carbon fibers (ACF) and polyimide (P84) doped ACF modified by HNO3 solution were studied to apply in mercury removal in coal-fired flue gases.The P84,which was always used in the non-woven fabric for bag filter,was intermingled with polyacrylonitrile-based ACF (PAN-ACF) in the weight ratio of 1:1 in order to make the doped ACF with P84 (doped-ACF-P84).Then the doped-ACF-P84 fibers were modified by HNO3 solution.The structure and morphology of doped-ACF-P84 were characterized and compared with those of ACF and doped-ACF-P84 modified by HNO3 solution.The results show that the modified doped-ACF-P84 fibers have almost the same pore structure and specific surface area comparing with the original one.However,contrasted with the original PAN-ACF,the doped-ACFP84 fibers modified by HNO3 solution have more oxygen-containing groups used for mercury removal.In particular,they have more lactone and carboxyl groups.     

有毒气体的微型实验设计——无机化学实验课的改革

本文对无机化学实验中的有毒气体 Cl2 、HCI、HBr、SO2 、NO2 、CO、NH3、H2 S、P2 O5 等的制备与性质实验进行了微型实验设计。用深井吸收法 ,气室法和全封闭管道等完成了有毒气体的制备及性质实验     

采用SBR法处理麻生物脱胶废水的研究

采用序批式活性污泥法（SBR）处理麻生物脱胶废水,与传统方法相比,废水中的COD、SS显著减少,且占地面积小、耐冲击负荷、污泥产生量少、能有效抑制丝状菌繁殖。当进水COD浓度为582.2～1665.7mg/L、进水SS浓度为106～915ml/L时,COD去除率为62.8%～86.9%,SS去除率为61.3%～88.6%。研究表明,进水[COD]在1000mg/L以下,宜采用限制性曝气;[COD]在1000mg/L以上,宜采用非限制性曝气。研究了一级生物降解反应动力学,得到了动力学常数K1和不可降解有机物浓度,模拟数与试验数据吻合良好。     

无机化学实验教学方法的改革初探

文章讨论了通过无机化学实验教学方法的改进来提高无机化学实验的教学质量。在教学过程中引入多媒体实验教学课件,建立无机化学实验教学网络平台,在暑假期间鼓励学生从事开放实验的训练,提高学生的实验技能,使实验教学质量不断提高。     

The Mechanism of Eliminating Drafting Waves in Spinning

The mechanism of the staple yarn's drafting waves during roller drafting is analyzed in this paper.It's concluded that the dynamic friction coefficient is greater than the static friction coefficient on the friction behavior of fibers, and the difference is largely responsible for the " stick-slip" motion of fibers which causes the drafting waves during drafting. In this paper,it's expected that when a high frequency undulating wave is imposed on the fiber strand in the drafting zone of roller system, the friction among fibers is dominated by the dynamic friction rather than the static friction, and thus the " stick-slip" motion will be eliminated. As a result, the fiber binding effect causing drafting waves can be significantly reduced. This hypothesis is verified by an experiment, and it can be applied in developing new spinning drafting device.     

基于机器视觉的棉纺异纤清除系统

异性纤维检测清除技术是近几年来国内外研究的热点.本文给出了基于机器视觉的异性纤维清除系统框架,提出了灰度结合非线性阈值判断的算法用于检测皮棉中的异性纤维.实验结果表明,该方法有效地清除皮棉中的异性纤维,并提高了系统的清除率.     

高师无机化学实验绿色化探讨

绿色化学的基本思想是在设计、研究没有或尽可能少的环境负作用的无害化学,在技术和经济上,它是可行的;在本质上,有别于环境化学.现阶段,大学无机化学课基本上是由实验引入的,而其实验存在的一些不合理因素,对环境造成了严重的危害,是一个不容忽视的污染源.文章结合绿色化学的理念和大学无机化学实验的具体状况,对大学无机化学实验进行了系统的绿色化研究和大面积的教学改进,对部分污染较大的传统实验进行无害化改造,很大程度实现了大学无机化学实验绿色化.     

无机盐阻燃麻纤维热解及阻燃机理研究

将麻纤维用含氮、磷、卤的无机阻燃化合物处理,所得阻燃纤维采用热分析、锥形量热分析、红外光谱研究其热解行为,用氧指数、剩碳率、热释放速率和有效燃烧热等参数表征它的阻燃性能,并用Broido方程计算麻纤维的动力学参数热解活化能的变化。通过比较未处理麻纤维和阻燃麻纤维的热解行为、阻燃性能及热解反应活化能的变化,初步探讨无机阻燃化合物处理麻纤维的阻燃机理。     

新型有机/无机复合非线性光学材料制备及特性

用溶胶 -凝胶 (Sol_Gel)法制备了含对硝基偶氮苯酚 (NHA)和分散橙 3(DO3)生色团的两种掺杂型有机 /无机复合非线性光学 (NLO)材料 ,并通过FTIR、1H_NMR、UV_VIS、DSC和二次谐波信号 (SHG)测量等方法对它们的制备过程和NLO性能进行了考察 .实验结果表明 :两种掺杂型聚合物膜的最高掺杂量分别为w =7.2 %和w =11.3% ;二阶非线性光学系数 (d33)值分别为 2 .91× 10 - 8esu和 6.14× 10 - 8esu ;两种聚合物膜的常温稳定性都较好 ,90d后d33 值都能保持其初值的 85%以上 ,373K下 10h后d33值也能保持其初值的 50 %左右 .     

活性炭纤维（ACF）的制备、性能及在石油加工中的应用

介绍了国内外活性炭纤维（Activated cardon fiber ACF)制备工艺进展,这种新型材料的微孔结构决定了优异的吸附性能,预测了在石油加工中广泛的应用前景。