塑料包装材料表面的电晕处理与火焰处理

本文分析了塑料包装材料印刷、粘接困难的原因、介绍了两种表面处理改性方法,即电晕处理和火焰处理,并对这两种方法处理效果的影响因素进行了讨论,指出了提高表面处理改性质量的主要因素。     

氟石膏后处理系统的改进

氟石膏后处理系统从湿法工艺改造为干法工艺的同时,通过改变物料输送和贮运方式,较好地消除了影响生产的因素、改善了现场环境和操作条件。     

黑液治理研究进展

在综合了目前黑液治理技术和实例考察结果的基础上，提出了黑液治理应以生化处理为主体，加强前端预处理和后端物化处理的思路。     

难生物降解有机废水处理技术现状与发展

工业有机废水都含有毒性和稳定性强的污染物，对于这样的废水难以用常规的物理、化学及生物方法处理。对目前国内外难生物降解有机废水的主要处理技术进行了综述，包括生物处理、化学处理和物理处理及各种联合处理工艺，阐述了各种方法或工艺的优缺点及它们的研究现状及进展。得出了单一工艺对难生物降解有机物废水的处理都存在一定的局限性的结论，指出了新的联合工艺的开发与应用将成为难降解有机废水处理发展的方向。     

有机颜料的表面处理

简单介绍了有机颜料的表面活性和表面处理的必要性，并对有机颜料表面处理和处理方法作了物概括的描述。     

现代磷化

本文叙述了现代磷化的特点;磷化膜提高油漆结合力和耐蚀性的原因;磷化机理;磷化加速剂和表面调整剂的作用.介绍了作者研制的表调剂、常温、中温低浓度磷化剂的性能.     

浅论模具的表面处理技术

文章阐述了几种表面处理技术和应用情况。实践证明，表面强化处理是模具强化处理的最新技术和有效手段，应该大力发展和推广。     

含油废水处理技术研究进展

概述了含油废水的来源、危害、特点和分类,阐述了含油废水常用处理方法的原理、优势及存在问题,介绍了最新研究成果,提出了含油废水处理的发展趋势。     

蓝色硅胶的生产方法

现有技术中，硅胶生产所用的原料都是硅酸钠和硫酸。由于制备方法的不同和控制工艺参数的不同，可以制备出不同品质的硅胶。ZL93110232．4号专利文献披露了一种B型球形硅胶的生产工艺方法。该工艺方法的流程步骤为：造粒制胶→老化处理→酸化处理→水洗处理→表面活化处理→干燥处理→筛选包装。     

一种快速软化方法

对增重砂（ballasted sand）絮凝技术处理含有硬度的工业废水的可行性进行了研究。该项研究分3阶段进行。第1阶段处理了含钙硬的废水．第2阶段处理含镁硬和二氧化硅的废水．第3阶段处理含有钙、镁和二氧化硅的废水，研究发现．该处理系统可实现快速软化，明显减少了处理时间并提高了处理水的水质。并可在各种浓度和工艺条件下运行。     

A Review of Contemporary Views of Theories of Adhesion

The once distinct and independent theories of adhesion have been losing their isolation and converging. Ideas of the effects of surface roughness, once dismissed as irrelevant except in the case of textiles, have been revised; albeit on a smaller scale as details of surfaces have been revealed by sophisticated techniques. Electrostatic interactions across an interface have been more deeply explored and their significance recognised and expounded. Diffusion of groupings and chain segments within a polymer have been related to the possibilities of interaction with a variety of surfaces. Perhaps most important, theories of adsorption have been extended in depth. The precise nature of the molecular interactions have been recognised and quantified. In doing this the contribution of diffusion and elastoplastic phenomena have been integrated. These developments are collated and analysed to present the present understanding of the concepts.     

A Review of Contemporary Views of Theories of Adhesion

The once distinct and independent theories of adhesion have been losing their isolation and converging. Ideas of the effects of surface roughness, once dismissed as irrelevant except in the case of textiles, have been revised; albeit on a smaller scale as details of surfaces have been revealed by sophisticated techniques. Electrostatic interactions across an interface have been more deeply explored and their significance recognised and expounded. Diffusion of groupings and chain segments within a polymer have been related to the possibilities of interaction with a variety of surfaces. Perhaps most important, theories of adsorption have been extended in depth. The precise nature of the molecular interactions have been recognised and quantified. In doing this the contribution of diffusion and elastoplastic phenomena have been integrated. These developments are collated and analysed to present the present understanding of the concepts.     

Structural,mechanical, and gas barrier properties of poly(ethylene terephthalate) nanohybrid using nanotalc

Amorphous poly(ethylene terephthalate) (PET)/nanotalc nanohybrids have been prepared through solution casting route. The fine dispersion of nanotalc clay in the polymer matrix has been examined through transmission electron microscopy (TEM). The intercalation and interaction of nanoclay have further been confirmed using X-ray diffraction, ultraviolet, and Fourier transform infrared techniques. The thermal stability has been tested via thermogravimetric analysis and nanohybrids have been found thermally stable. The glass-transition temperature has been further confirmed through DTA and differential scanning calorimetry analysis which has been increased in the presence of nanotalc arising from greater interaction. The nanohybrids have been tested for their mechanical performances and have been found to have improved mechanical responses for nanotalc-filled nanohybrids. The modulus has been increased whereas toughness has been compromised meagerly. The modulus values have been theoretically predicted using various micromechanical models. The microhardness of the nanohybrids has been examined through Vicker hardness test. The theoretical prediction of the hardness values has been done using different micromechanical models. The structural development upon uniaxial stretching of the samples has been studied using small-angle X-ray scattering and wide-angle ray diffraction. The stretched samples have found to have short-range ordering as well as increased blob size and better coherency in the presence of nanotalc. The aspect ratio has been increased upon stretching. The inclusion of nanotalc has induced high barrier for gas permeation as compared to pure PET. The oxygen transmission rate has been found to decrease up to 64% for 8 wt % of filler concentration. The prediction of the permeability data has been done using different models considering different aspect ratios. The permeability values have been predicted very closely and nanohybrids have been found suitable for practical applications such as packaging. © 2020 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 137, 48607.     

关于陶瓷墙地砖的深加工及其机械

本文简要回顾了陶瓷墙地砖深加工的工艺理论和机械设备。对陶瓷墙地砖深加工的自动抛光生产线和组成生产线的工艺单机作了一般介绍。指出设计陶瓷墙地砖深加工工艺单机时要注意的主要问题,并提供了解决这些问题的方法。     

INVITED REVIEW ABSORPTION OF NOX GASES

Oxidation of nitric oxide is an important step in NO_x absorption. Recent advances namely catalytic oxidation and the use of slrong oxidizing agents have been reviewed. The refinements which have been made in the kinetics of NO oxidation have been discussed. Several liquid phase absorbents have been suggested for the NO removal, particularly for the purpose of pollution abatement. Different models for NO oxidation using nitric acid have been analysed and the limitations of published information have been brought out.

Absorption of tetravalent nitrogen oxide (NO₂ and N₂O₄) has received considerable attention. The absorbents include water, nitric and sulfuric acids, sodium hydroxide, sodium sulfite and sodium chlorite. Absorption in water and nitric acid is important in the manufacture of nitric acid. The published information on the mechanism of NO₂ and N₂O₄ absorption in water has been critically analysed. The problem of nitrous acid decomposition has been analysed on the basis of film theory. The predictions agree favourably with the available experimental data.

A new mathematical model has been developed for a packed column. Performance charts have been prepared which take into account the effects of concentration of nitric acid, superficial liquid velocity, temperature and the partial pressures of various components. A simplified model on the basis of NO oxidation has also been presented.

Various process design aspects have been discussed in detail. Optimum values for various operating parameters exist and basis for their selection has been explained. Some engineering aspects such as the selection of equipment and material of construction have also been discussed. A comparison between semi-batch and continuous modes of operation has been presented. The problem of the manufacture of pure nitrites has been analysed

Specific recommendations have been made regarding the use of equations and procedures in design. The knowledge gaps have been clearly brought out and suggestions have been made for future work     

SIGNIFICANCE OF THE CENTRAL PLUME VELOCITY FOR THE CORRELATION OF LIQUID PHASE MIXING IN BUBBLE COLUMNS

The knowledge of the flow patterns of each phase of bubble column reactors is of considerable importance for the rational design and scale-up. The hydrodynamic models for the liquid phase have been reviewed. The models have been based on some form of pressure balance or energy balance. These two approaches have been compared and recommendations have been made regarding the range of applicability of the individual models. A comparison between the predicted and the experimental liquid velocities has been presented whenever possible. The range of variables has been pointed out for which further investigations are needed. The empirical and theoretical models for the mixing behavior of the different phases of bubble column reactors have also been reviewed.     

The Application of Biocatalysis in the Preparation and Resolution of Morita-Baylis-Hillman Adducts and Their Derivatives

The Morita-Baylis-Hillman (MBH) reaction affords highly functionalised allylic alcohols containing a new stereogenic centre. These MBH adducts are very versatile and have been transformed into a large range of products, some of which have medicinal potential. Several examples of asymmetric syntheses of MBH adducts have been reported, although a generally applicable method remains to be developed. Biocatalytic approaches for the synthesis and enzymatic kinetic resolution of MBH adducts have been reported, and are discussed in detail in this review. Enzymes able to catalyse the asymmetric MBH reaction have been identified, but selectivity and efficiency have generally been low. Lipases, esterases and nitrile-converting enzymes have all been successfully applied in the resolution of MBH adducts, with excellent selectivity being realised in most cases.     

水处理除盐系统出力不足的原因分析及处理措施

针对郑州热电厂五期补给水处理一级除盐系统酸碱耗大、自用水率高、出力严重不足等问题，对现场进行了调查研究，分析了主要原因，并提出了相应的处理措施，最终使问题得以解决。     

微乳液特性及在纳米材料制备中的应用

本文主要介绍了W／O相微乳液的组成、内部结构等特性，并简要分析了其制粉原理及影响因素。并对其在纳米材料制备领域中的应用进行了评述，对其今后的研究方向作了简要推测。     

Vapor-liquid equilibria in the system of glycidol synthesis products

Vapor-Liquid equilibrium (VLE) data have been calculated for systems made up by glycidol synthesis products and have been compared with data available from the literature. The VLE data reported for the systems have been optimized using the NRTL and UNIQUAC models, and the model parameters and their accuracy have been estimated. The VLE in binary and multicomponent systems has been simulated.