Interpenetrating polymer networks based on polyol modified castor oil polyurethane and poly(2‐ethoxyethyl methacrylate): Synthesis,chemical, mechanical,thermal properties,and morphology

Interpenetrating polymer networks (IPNs) of glycerol modified castor oil polyurethane (GC‐PU) and poly(2‐ethoxyethyl methacrylate) poly(2‐EOEMA) were synthesized using benzoyl peroxide as initiator and ethylene glycol dimethacrylate (EGDM) as crosslinker. GC‐PU/poly (2‐EOEMA) interpenetrating polymer networks were obtained by transfer molding. The novel GC‐PU/poly (2‐EOEMA) IPNs are found to be tough films. These IPNs are characterized in terms of their resistance to chemical reagents thermal behavior (DSC, TGA) and mechanical behavior, including tensile strength, Young's modulus, shore A hardness, and elongation. The morphological behavior was studied by scanning electron microscopy. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 94: 1029–1034, 2004     

EDTA络合滴定法快速测定碳酸锆中锆铪含量

锆铪氧化物含量的测定通常采用苦杏仁酸[C6H5CH（OH）COOH]重量法。该法经典、准确,但操作烦琐,分析时间长,对日常生产、入库或销售不利。乙二胺四乙酸二钠（EDTA）络合滴定法（容量法）操作简便、快速、准确,适合日常检验。但用基准氧化锌、高纯二氧化锆或氯氧化锆来标定EDTA时,测定结果偏低。采用重量法和容量法相结合,先用重量法测定锆铪氧化物含量,以已知锆铪氧化物含量的碳酸锆作标定物,再标定EDTA标准溶液的滴定度,用此EDTA标准溶液测定相同原料生产的碳酸锆。该法简便、快速、准确,试剂安全性好。     

自然过程碳排放数据信息WebGIS

作为自然过程碳排放数据信息管理系统建设的重点内容,自然过程碳排放研究数据WebGIS系统的构建成为了本文的研究对象.该系统以Silverlight为客户端平台,以ArcGIS Server作为系统GIS服务器,结合WCF RIA Service、ArcGIS API for Silverlight等WebGIS技术进行了系统的框架结构和空间数据库的设计,给出了系统属性数据和空间数据的组织和Web访问策略,实现属性数据的网络动态查询、检索、统计和分析与空间数据的网络地图展示、空间分析和专题图制作等功能.在系统构建过程中,重点分析了其涉及的WebGIS关键技术和解决方案的具体实施.研究表明,基于Silverlight技术和ArcGIS Server平台构建的WebGIS系统,不仅能解决地理空间数据的发布与管理,快速高效进行系统功能的开发,同时还能满足用户对系统高交互性和响应时间的要求,并提高WebGIS系统的表现力.     

Low cost coal-based carbons for combined SO2 and NO removal from exhaust gas

The aim of this paper is to show how a cheap carbonaceous material such as low rank coal-based carbon (or char) can be used in the combined SO₂/NO removal from exhaust gas at the linear gas velocity used in commercial systems (0.12 m s⁻¹). Char is produced from carbonization and optionally activated with steam. This char is used in a first step to abate the SO₂ concentration at the following conditions: 100 °C, space velocity of 3600 h⁻¹, 6% O₂, 10% H₂O, 1000 ppmv SO₂, 1000 ppmv NO and N₂ as remainder. In a second step, when the SO₂ concentration in the flue gas is low, NO is reduced to N₂ and steam at the following experimental conditions: 150 °C, space velocity of 900 h⁻¹, 6% O₂, 10% H₂O, 0-500 ppmv SO₂, 1000 ppmv NO, 1000 ppmv NH₃ and N₂ as remainder.It has been shown that the presence of NO has no effect on SO₂ abatement during the first step of combined SO₂/NO removal system and that low SO₂ inlet concentration has a negligible effect on NO reduction in the second step. Moreover, this char can be thermally regenerated after use for various cycles without loss of activity. On the other hand, this regenerated char shows the highest NO removal activity (compared to parent chars, either carbonized or steam activated) which can be attributed to the activating effect of the sulfuric acid formed during the first step of the combined SO₂/NO removal system.     

Irganox HP-136的稳定机理及在PP稳定过程中的作用

Irganox HP-136（3-芳基-苯并呋喃酮）是一种高效的自由基捕捉剂,它能有效地捕获以碳为中心的自由基,许多实验表明它在聚合物稳定过程中起到了重要的作用.本文比较了Irganox HP-136与传统抗氧剂的抗氧机理,并分析了其在PP稳定过程中的作用.     

活性炭多维电极法去除水中溶解态腐殖酸研究

本文以活性炭多维电极法，去除水中氯消毒副产物的前驱物－溶解态腐殖酸。文章比较了活性炭多维电极法与活性炭单纯吸附的去除效果，讨论了水样pH值、Ca^2 浓度、外电压、活性炭粒径和加入量对去除效果的影响。     

X-ray photoelectron spectroscopy of Pd/γ-alumina and Pd foil after catalytic methane oxidation

Samples of palladium supported on-alumina and a palladium foil were used as catalysts for methane oxidation at 550° C. The samples were quenched quickly in the reaction chamber to room temperature in flowing Ar and then transferred in vacuo for XPS analysis. Structure sensitivity was manifest from an increase in PdO stability and a decrease in carbon deposition relative to Pd with increasing particle size. The results were compared with recent ellipsometric data.     

中国铝用炭素50年的技术创新模式分析

简要叙述了技术创新的概念和技术创新的主要模式,对我国铝用炭素50年来的若干主要技术创新点的技术创新模式进行分析,并分析了我国铝用炭素技术创新的诱导因素和技术创新体系,提出一些不足和努力方向。     

有序介孔碳材料的模板化构筑及水处理应用研究

介孔碳材料是指孔径介于2 nm-50 nm的一类多孔碳材料。有序介孔碳材料，具有比表面积高、孔道结构规则有序、孔径分布狭窄、孔径大小可调控、表面易于修饰等结构特点和高机械强度、强吸附能力、化学惰性等性能特点，在诸多领域得到了广泛应用，特别是其作为新型吸附剂在水处理领域具有广阔的发展前景。有序介孔炭材料的制备方法主要有硬模板法和软模板法。模板和碳源的选择是控制有序介孔碳材料结构和性能的关键因素。本文从有序介孔硅、天然矿物、MOFs材料、嵌段共聚物等不同模板的角度对有序介孔碳、多级有序微/介孔碳、多级有序大/介孔碳的制备方法进行综述，并对有序介孔碳材料在水处理领域的应用进行简单介绍。     

降低循环流化床锅炉飞灰含碳量的因素分析

循环流化床锅炉的飞灰含碳量是锅炉燃烧工况好坏的直接反映 ,其对锅炉的热效率的影响是很大的 ,它还直接影响着粉煤灰的综合开发和利用 .在对云天化循环流化床锅炉的生产实验研究中 ,分析了影响循环流化床锅炉飞灰含碳量的各种因素 (床温、煤质煤粒、一次风、二次风、床压和旋风分离器效率等 ) ,通过实验研究找到了降低循环流化床锅炉飞灰含碳量的具体而又行之有效的操作方法 ,以指导实际生产 .