聚乙烯防雾膜的研制Ⅰ.防雾滴剂结构与防雾性的关系

在聚乙烯中分别添加不同结构的防雾滴剂，用PLE－300型Brabander吹塑机吹塑成膜。研究了防雾滴剂的结构与防雾性能的关系，结果表明：防雾滴剂的碳链长，则持久防雾性好；经氢化后的防雾滴剂持久防雾效果好，但润湿性能变差；防雾滴剂中存在着不饱和亲油基、环状亲油基及引入带有弱亲水基的烃基，均会降低持久防雾效果。     

新型冠醚化合物的合成应用新进展

简要介绍了冠醚化学的产生、发展及应用;重点介绍了:(1)新型冠醚化合物的合成及应用;(2)新型冠醚超分子聚合物的合成及自组装;(3)新型金属冠醚的合成及应用,并对冠醚化学的发展进行了展望。     

新型冠醚化合物的合成性能及应用研究的新进展

介绍了冠醚化学的产生发展及应用,详细综述了:①新型冠醚的合成及其对阳离子的选择性识别作用;②新型双冠醚配体及其稀土过渡金属配合物的合成;③新型氮杂冠醚的合成及应用。并对冠醚化学的发展进行了展望。     

Recent progress in porous organic polymers and their application for CO2 capture

Carbon capture, storage, and utilization (CCSU) is recognized as an effective method to reduce the excessive emission of CO₂. Absorption by amine aqueous solutions is considered highly efficient for CO₂ capture from the flue gas because of the large CO₂ capture capacity and high selectivity. However, it is often limited by the equipment corrosion and the high desorption energy consumption, and adsorption of CO₂ using solid adsorbents has been receiving more attention in recent years due to its simplicity and high efficiency. More recently, a great number of porous organic polymers (POPs) have been designed and constructed for CO₂ capture, and they are proven promising solid adsorbents for CO₂ capture due to their high Brunauer-Emmett-Teller (BET) surface area (S_BET), adjustable pore size and easy functionalization. In particular, they usually have rigid skeleton, permanent porosity, and good physiochemical stability. In this review, we have a detailed review for the different POPs developed in recent years, not only the design strategy, but also the special structure for CO₂ capture. The outlook of the opportunities and challenges of the POPs is also proposed.     

Recent progress in zinc oxide nanomaterials and nanocomposites: From synthesis to applications

The global market of ZnO grows at an annual rate of 4.03%. ZnO has been used in a wide array of applications owing to its unique chemical, physical, and biological properties. In general, the properties of ZnO, such as band gap, crystallite size, and morphology, depend on the synthesis method and parameters employed. In this review, recent progress in the research on ZnO is presented. This review focuses on the latest advancements in pristine ZnO, doped ZnO, ZnO-based nanocomposites with other metal oxides, carbon-based materials, and spinels. The effect of the synthesis method and conditions on the properties of ZnO is discussed. In particular, recent studies on ZnO prepared through precipitation method, green synthesis, green combustion method, hydrothermal method, microwave-assisted hydrothermal, and sol–gel synthesis are reviewed. The effect of dopants and metal oxides on ZnO characteristics is also laid out. This review aims to provide the readers with a thorough understanding of structure–property relationships achieved by varying the synthesis parameters of ZnO, which will be beneficial for the fabrication of high-performance ZnO-based materials for photocatalytic, biological, gas sensing, and flexible electronic applications.     

氨合成催化剂的进展

Fe_1－xO催化剂体系和钌催化剂的发现,标志着合成氨催化剂的研究取得了重大进展。Fe_1－xO催化剂体系的发明,使氨合成催化剂的活性有了一个飞跃性的进步,为熔铁催化剂的发展注入了生机。钌催化剂的发明则有可能成为真正突破经历了近一个世纪的铁催化剂的使用历史。由于钌的稀有和昂贵,要在工业上广泛应用,还需要做大量的研究。     

Recent developments and progress of aerogel assisted environmental remediation: a review

Journal of Porous Materials - Aerogel is a special type of porous material with many outstanding physical and chemical properties, such as low density, high porosity, high surface area, and...     

水溶性偶氮引发剂的合成与应用进展

总结了水溶性偶氮引发剂的分类、合成及应用现状.水溶液聚合和乳液聚合是自由基聚合机理重要的实施手段.它们使用环保水来做分散相,可采用水溶性的偶氮引发剂来进行聚合反应.研究表明,相比于油溶性的偶氮引发剂或常规的氧化还原引发体系,水溶性偶氮引发剂不论足在引发、聚合及产品特征方面都有明显的优势.最后对我国水溶性偶氮引发剂的发展...     

Recent progress in electrodeposition of thermoelectric thin films and nanostructures

Thermoelectric power generators and coolers have many advantages over conventional refrigerators and power generators such as solid-state operation, compact design, vast scalability, zero-emissions and long operating lifetime with no maintenance. However, the applications of thermoelectric devices are limited to where their unique advantages outweigh their low efficiency. Despite this practical confine, there has been a reinvigorated interest in the field of thermoelectrics through identification of classical and quantum mechanical size effects, which provide additional ways to enhance energy conversion efficiencies in nanostructured materials. Although, there are a few reports which demonstrated the improvement of efficiency through nanoengineering, the successful application of these nanostructures will be determined by a cost-effective and high through-put fabrication method. Electrodeposition is the method of choice to synthesize nanoengineered thermoelectric materials because of low operating and capital cost, high deposition rates, near room temperature operation, and the ability to tailor the properties of materials by adjusting deposition conditions. In this paper, we reviewed the recent progress of the electrodeposition of thermoelectric thin films and nanostructures including Bi, Bi_1−xSb_x, Bi₂Te₃, Sb₂Te₃, (Bi_1−xSb_x)₂Te₃, Bi₂Se₃, Bi₂Te_3−ySe_y, PbTe, PbSe, PbSe_1−xTe_x and CoSb₃.     

Schiff bases and their complexes: Recent progress in thermal analysis

Schiff bases are versatile compounds synthesized from the condensation of primary amino compounds with aldehydes or ketones. The high thermal of many Schiff base and their complexes were useful attributes for their application as catalysts in reactions involving at high temperatures. This thermal behavior of Schiff bases and their complexes was evaluated by TGA/DTG and DTA curves with mass losses related to dehydration and decomposition. This review summarizes the developments in the last decade for thermal analysis of Schiff bases. Therefore, synthesis of Schiff bases and their complexes are reviewed.     

新型中孔分子筛研究进展

中孔分子筛已成为人们研究的一个重要课题。目前，人们用不同的表面活性剂，根据不同的组装路线合成出了M41S、SBA-n系列、HMS、KIT-1、MSU-x、MSU-V、MSU-G、MSU-S和 MSU-H等中孔分子筛。对目前的中孔分子筛的研究情况进行了综述，分析了合成路线及合成所用的不同的表面活性剂，对今后的研究方向作了展望。     

微反应器研究与应用新进展

近5年许多研究和开发活动集中于进行小尺度反应这一未开发领域。着重分析了基于微反应器的生产装置设想的可行性以及它是否是一个理智的选择。侧重介绍了微反应器在热交换、光化学反应和电化学反应、气相/液相反应以及不同种类气相反应等方面的应用实例。指出应采取冷静乐观的态度对待微反应器和微化学工程,它不仅需要现代的加工方法,还特别需要大量的适用知识。     

水溶性农用聚磷酸铵的研究与应用进展

低聚合度水溶性聚磷酸铵是一种新型高浓度肥料,因其缓释高效、安全易复配的特点在近年新肥料研发和农业应用中受到广泛欢迎。综述了近期水溶性农用聚磷酸铵的合成方法和农学实验的研究进展。论述了水溶性农用聚磷酸铵在农业生产中的施用优点以及聚磷酸铵肥料的相关质量检测方法。分析了水溶性农用聚磷酸铵在土壤中的水解作用机理。阐述了当今农用聚磷酸铵肥料在实际生产应用中存在的问题与发展方向。     

Recent research progress on bio-oil conversion into bio-fuels and raw chemicals: a review

Recent advances in lignocellulosic biomass valorization for producing fuels and commodities (olefins and BTX aromatics) are gathered in this paper, with a focus on the conversion of bio-oil (produced by fast pyrolysis of biomass). The main valorization routes are: (i) conditioning of bio-oil (by esterification, aldol condensation, ketonization, in situ cracking, and mild hydrodeoxygenation) for its use as a fuel or stable raw material for further catalytic processing; (ii) production of fuels by deep hydrodeoxygenation; (iii) ex situ catalytic cracking (in line) of the volatiles produced in biomass pyrolysis, aimed at the selective production of olefins and aromatics; (iv) cracking of raw bio-oil in units designed with specific objectives concerning selectivity; and (v) processing in fluidized bed catalytic cracking (FCC) units. This review deals with the technological evolution of these routes, in terms of catalysts, reaction conditions, reactors, and product yields. A study has been carried out on the current state-of-knowledge of the technological capacity, advantages and disadvantages of the different routes, as well as on the prospects for the implementation of each route within the scope of the Sustainable Refinery. © 2018 Society of Chemical Industry     

电去离子技术的应用与研究进展

介绍了电去离子(EDI)技术工作的基本原理,阐述了包括特种分离在内的国内外EDI技术应用进展,除传统的纯水制备外,特别对当前EDI的几个新兴应用领域进行了分析总结,主要包括低浓度重金属废水处理、化工产品分离纯化、树脂电化学再生、饮用水脱硝等.在研究进展方面,主要对EDI膜堆的结构设计、当前EDI运行过程中的结垢问题与防治措施、EDI与其他技术的集成以及传质机理研究等进行了探讨.最后对EDI技术的发展前景进行了分析和展望.     

提高多产丙烯性能的ZSM-5分子筛改性研究进展

催化裂化装置在多产丙烯方面扮演着重要的角色,ZSM-5分子筛由于具有特殊的孔道结构、活性较高以及择形催化等特点,是催化裂化多产丙烯主要催化剂。综述采用改性手段增强ZSM-5分子筛水热稳定性和引入介孔提高分子可及性研究进展,主要包括F改性,P改性,过渡金属及稀土掺杂等改性手段,以及物理化学法脱铝脱硅,软模板法和硬模板法修饰ZSM-5分子筛孔道。     

偕胺肟类化合物的合成与应用新进展

偕胺肟类化合物具有优良的金属离子吸附性能、多样化的品种,已被广泛应用在材料、化工等行业中。本文介绍了偕胺肟类化合物及其中间体的合成方法,包括氰乙基化、聚合以及偕胺肟化;综述了上述合成方法以及偕胺肟类化合物的应用研究进展,并由此提出了偕胺肟类化合物未来的发展方向。     

胺类化合物合成与应用研究进展

主要依照烃基的不同,分类介绍胺类化合物的合成研究现状,详述了脂肪胺、芳香胺的合成。阐述了胺类化合物在矿物浮选、湿法冶金及废水处理等工业应用的进展,并由此提出胺类化合物未来研究的发展趋势。     

Piezoelectric thick films and their application in MEMS

Piezoelectric thick films (up to 10 μm thick) and piezoelectric micromachined ultrasonic transducer (pMUT) have been successfully demonstrated at low temperatures of 650 °C using a composite thick film processing route. Submicron-sized PZT powder was dispersed into sol–gel solution to form homogeneous slurry for spin-coating on silicon substrate. Issues associated with recipe of the slurry, deposition process and sintering of films have been summarized with a view to optimizing the properties of the films and pMUTs. Typical microstructure, ferroelectric and piezoelectric properties of the composite films are given. Thermal stability of bottom electrode, a key issue about device fabrication, has also been investigated. The ultrasound-radiating performance of the pMUT element in response to a continuous alternating current driving voltage has been reported. The generated sound pressure level is 116.8 dB at 76.3 kHz at a measuring distance of 12 mm. The pMUT is suitable for application of airborne object recognition.     

Zinc-based metal-organic frameworks: synthesis and recent progress in biomedical application

Journal of Inorganic and Organometallic Polymers and Materials - This review based on Zn-based MOF is summarized on new insights for targeted drug delivery of medicinal compounds and developed for...