新型干燥设备——直热式燃气纸浆模塑烘干线的设计和制造

介绍了以天然气为燃料的纸浆模塑烘干线的设计过程 ,以及该套设备的制造和安装要点。由于使用了清洁能源 ,所以该套设备能生产出清洁度较高的纸浆模塑包装制品 ,满足电子工业和食品工业对包装制品的要求     

固体超强酸T：O_2／SO_4~(2-)催化合成水杨酸乙酯

研究了以固体超强酸Ｔ：Ｏ＿２／ＳＯ＿４￣（２－）为催化剂，水杨酸和乙醇为原料合成水杨酸乙酯，并考察了醇酸比、催化剂用量、反应时间、反应温度对酯产率的影响。结果表明，在水杨酸用量为０．１ｍｏｌ的情况下用固体超强酸Ｔ：Ｏ＿２／ＳＯ＿４￣（２－）为催化剂，催化剂用量为１．０克，乙醇与水杨酸的摩尔比为３：１或４：１，反应时间为５小时，反应温度９５一１００℃是最适宜的反应条件，酯产率达８９％。并且同硫酸相比，固体超强酸Ｔ：Ｏ＿２／ＳＯ＿４￣（２－）有许多优点：产品容易从催化剂中分离，后处理方便，减少废液，降低动力消耗，具有很好的经济性。     

几种增塑剂增塑聚乳酸的性能研究

用聚乙二醇（PEG）、邻苯二甲酸二辛酯（DOP）、柠檬酸三丁酯（TBC）、亚磷酸三苯酯（TPPi）、癸二酸二丁酯（DBS）分别与聚乳酸（PLA）熔融共混，通过试样拉伸性能测试和DSC分析，研究这几种增塑剂对PLA拉伸性能和热性能的作用。结果表明，在这几种增塑剂中，TPPi和DBS增塑效果最好，能显著降低PLA玻璃化转变温度和熔融温度，提高PLA断裂伸长率和结晶度。     

水中苯胺类化合物检测1—萘酚试剂盒的研制

本文提出一种能快速灵敏地检测地面水和污水中苯胺类化合物的试剂盒。该方法是以 N-氯代丁二酰亚胺氧化苯胺 ,在 p H9- 1 1的碱性介质中 〔1〕,以 1 -萘酚偶联显色。显色反应所得的蓝色化合物的最大吸收波长为 61 0 nm,在苯胺浓度为 0 .2～ 8mg/L的浓度范围内符合比尔定律 ,最低检出限为 0 .0 2 mg/L ,测定的重现性在± 5 %以内。该试剂盒用于合成水样和环境水样的分析 ,回收率在 94.9～ 98.2之间。这种试剂盒可以成功地用于合成水样和环境水样的分析     

Integrating a membrane and a fluidized pellet reactor for removing hardness: effects of NOM and phosphate

A novel treatment process combining a membrane with outside-in flow configuration and a fluidized pellet rector for removing hardness was studied. The effects of influent water quality, e.g., concentrations of natural organic matter (NOM) and phosphate along with the hydrophobicity of NOM, on the hardness removal efficiency of the novel process were investigated. The hardness removal efficiency decreases with increasing NOM concentration. However, the NOM removal efficiency is independent of NOM concentration and is related to the hydrophobicity of NOM samples. Raw water containing phosphate has adverse impact on the hardness removal efficiency, which decreases from 85% for treating water containing no phosphate to only 38% and 14% for water containing 0.33 mg/L and 1.63 mg/L of phosphate, respectively.     

磷石膏的微量组分及其对水泥凝结、水化和硬化的影响

借助差热分析、热失重、X射线衍射和扫描电镜等测试手段,分析了磷石膏的微量组分,研究了磷石膏对硅酸盐水泥物理性能及水化过程和水化产物的影响,进而探讨了磷石膏对水泥单矿物的水化作用机理。     

纳米TiO_2可见光催化零VOC内墙乳胶漆

介绍了纳米TiO2光催化的机理和特点、纳米TiO2可见光催化零VOC内墙乳胶漆的性能和应用等。表明其不仅是零VOC无毒无害,而且是一种能在一般室内照明条件下净化空气的内墙乳胶漆。     

彰显百年风范再创明天辉煌——专访大连橡胶塑料机械股份有限公司董事长、总经理洛少宁

今年的7月1日是大连橡胶塑料机械股份有限公司的百年华诞。100年来,见证了中国机械工业的近现代历史,也鲜活地呈现着中国机械工业发展的轨迹。在纪念公司百年华诞的日子里,本刊特约通讯员郭恒智(以下简称郭)访问了董事长、党委书记、总经理洛少宁先生(以下称洛总)。     

The Effects of Phenyltrimethoxysilane Coupling Agents on the Properties of PTFE/Silica Composites

A study on PTFE reinforced with SiO₂ was described. This study included the manufactural process of SiO₂-reinforced PTFE and the effects of the content of silane (Z6124) on the properties of the composites material, such as thermal, dielectric properties, tensile strength and morphology, etc. PTFE/silica composites of 60 wt% SiO₂ loaded with a different coupling agent content were mixed by a high-speed dispersion machine and prepared by a two-roll milling machine. Our results show that the sample treated with 3 wt% silane has the highest tensile strength and optimum dielectric properties. Furthermore, the tensile strength and coefficient of thermal expansion (CTE) increase, and the water absorption decreases, with an increasing silane content. These experiments reveal that silane treatment can reduce the overall hydrophilicity of the composites. Finally, predictions on dielectric and CTE properties are discussed. It has been found that experimental values of the dielectric constant agree well with those predicted by the rule of mixture.     

Novel polyacrylonitrile nanocomposites containing Na-montmorillonite and nano SiO2 particle

Polyacrylonitrile (PAN)/Na-montmorillonite (Na-MMT)/SiO₂ nanocomposites were prepared via in situ emulsion polymerization. X-ray diffraction (XRD) results suggest that the Na-MMT layers are exfoliated during the polymerization process. As evidenced by the transmission electron microscope (TEM), the Na-MMT and nano SiO₂ particles exhibit good dispersion in the polymer matrix. It was found that the PAN/Na-MMT/SiO₂ nanocomposites exhibit considerably enhanced mechanical properties compared with the PAN/Na-MMT and PAN/SiO₂ nanocomposites.