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抗静电增强尼龙66研制

刘建强

《中国工程科学》 2004年第6卷第6期页码 77-78

摘要：

以阴离子和非离子型抗静电剂组成复合抗静电体系，用玻璃纤维为增强剂，研制成具有良好抗静电和机械性能优良的尼龙66；介绍了抗静电复合体系及玻璃纤维含量对抗静电增强尼龙性能的影响。

关键词：尼龙66树脂抗静电增强剂

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Research progress of defect-engineered UiO-66(Zr) MOFs for photocatalytic hydrogen production

《能源前沿（英文）》 2021年第15卷第3期页码 656-666 doi: 10.1007/s11708-021-0765-9

摘要： In recent years, defect-engineered Zr-based UiO-66 metal-organic frameworks (UiO-66(Zr) metal-organic frameworks (MOFs)) have shown huge advantages in catalytic, functional materials, adsorption, and other fields due to their large surface areas, well-ordered porous structures, and flexible tailorability. It is extremely challenging to introduce defect sites in the synthesis of MOFs to regulate the physicochemical properties of materials such as (energy band structure, pore structure, etc.) to obtain an excellent performance. This paper reviews the recent research results of synthesis methods, characterization technologies, and application fields of defect-engineered UiO-66(Zr) MOFs materials in order to provide new insights to synthesize high-performance UiO-66(Zr) MOFs materials and promote the development of UiO-66(Zr) in various fields.

关键词： defect engineering metal-organic frameworks UiO-66 photocatalysis

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Integrating of metal-organic framework UiO-66-NH2 and cellulose nanofibers mat for high-performance adsorption

《化学科学与工程前沿（英文）》 2022年第16卷第9期页码 1387-1398 doi: 10.1007/s11705-022-2154-2

摘要： UiO-66-NH₂ is an efficient material for removing pollutants from wastewater due to its high specific surface area, high porosity and water stability. However, recycling them from wastewater is difficult. In this study, the cellulose nanofibers mat deacetylated from cellulose acetate nanofibers were used to combine with UiO-66-NH₂ by the method of in-situ growth to remove the toxic dye, rose bengal. Compared to previous work, the prepared composite could not only provide ease of separation of UiO-66-NH₂ from the water after adsorption but also demonstrate better adsorption capacity (683 mg∙g^‒1 (T = 25 °C, pH = 3)) than that of the simple UiO-66-NH₂ (309.6 mg∙g^‒1 (T = 25 °C, pH = 3)). Through the analysis of adsorption kinetics and isotherms, the adsorption for rose bengal is mainly suitable for the pseudo-second-order kinetic model and Freundlich model. Furthermore, the relevant research revealed that the main adsorption mechanism of the composite was electrostatic interaction, hydrogen bonding and π–π interaction. Overall, the approach depicts an efficient model for integrating metal-organic frameworks on cellulose nanofibers to improve metal-organic framework recovery performance with potentially broad applications.

关键词： UiO-66-NH₂ cellulose nanofibers rose bengal adsorption mechanism

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Metal-organic framework UiO-66 membranes

Xinlei Liu

《化学科学与工程前沿（英文）》 2020年第14卷第2期页码 216-232 doi: 10.1007/s11705-019-1857-5

摘要： Metal-organic frameworks (MOFs) have emerged as a class of promising membrane materials. UiO-66 is a prototypical and stable MOF material with a number of analogues. In this article, we review five approaches for fabricating UiO-66 polycrystalline membranes including synthesis, secondary synthesis, biphase synthesis, gas-phase deposition and electrochemical deposition, as well as their applications in gas separation, pervaporation, nanofiltration and ion separation. On this basis, we propose possible methods for scalable synthesis of UiO-66 membranes and their potential separation applications in the future.

关键词： membrane metal-organic framework UiO-66 separation

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Benzenesulfonic acid-grafted UIO-66 with improved hydrophobicity as a stable Brønsted acid catalyst

《化学科学与工程前沿（英文）》 2023年第17卷第10期页码 1389-1398 doi: 10.1007/s11705-022-2285-5

摘要： Hydrothermal and catalytic stability of UIO-66 MOFs with defective structures are critical aspects to be considered in their catalytic applications, especially under the conditions involving water, moisture and/or heat. Here, we report a facile strategy to introduce the macromolecular acid group to UIO-66 to improve the stability of the resulting UIO-66−PhSO₃H MOF in aqueous phase catalysis. In detail, UIO-66−PhSO₃H was obtained by grafting benzenesulfonic acid on the surface of the pristine UIO-66 to introduce the hydrophobicity, as well as the Brønsted acidity, then assessed using catalytic hydrolysis of cyclohexyl acetate (to cyclohexanol) in water. The introduction of hydrophobic molecules to UIO-66 could prevent the material from being attacked by hydroxyl polar molecules effectively, explaining its good structural stability during catalysis. UIO-66−PhSO₃H promoted the conversion of cyclohexyl acetate at ca. 87%, and its activity and textural properties were basically intact after the cyclic stability tests. The facile modification strategy can improve the hydrothermal stability of UIO-66 significantly, which can expand its catalytic applications in aqueous systems.

关键词： metal−organic frameworks (MOFs) UIO-66 hydrolysis of cyclohexyl acetate hydrophobicity Brønsted acidity

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Continuous amino-functionalized University of Oslo 66 membranes as efficacious polysulfide barriers for

《化学科学与工程前沿（英文）》 2023年第17卷第2期页码 194-205 doi: 10.1007/s11705-022-2206-7

摘要： The shuttle effect of soluble polysulfides is a serious problem impeding the development of lithium−sulfur batteries. Herein, continuous amino-functionalized University of Oslo 66 membranes supported on carbon nanotube films are proposed as ion-permselective interlayers that overcome these issues and show outstanding suppression of the polysulfide shuttle effect. The proposed membrane material has appropriately sized pores, and can act as ionic sieves and serve as barriers to polysulfides transport while allowing the passage of lithium ions during electrochemical cycles, thereby validly preventing the shuttling of polysulfides. Moreover, a fast catalytic conversion of polysulfides is also achieved with the as-developed interlayer. Therefore, lithium−sulfur batteries with this interlayer show a desirable initial capacity of 999.21 mAh·g^–1 at 1 C and a durable cyclic stability with a decay rate of only 0.04% per cycle over 300 cycles. Moreover, a high area capacity of 4.82 mAh·cm^–2 is also obtained even under increased sulfur loading (5.12 mg·cm^–2) and a lean-electrolyte condition (E/S = 4.8 μL·mg^–1).

关键词： lithium−sulfur batteries amino-functionalized University of Oslo 66 membrane polysulfide interlayer

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Flow synthesis of a novel zirconium-based UiO-66 nanofiltration membrane and its performance in the removal

Feichao Wu, Yanling Wang, Xiongfu Zhang

《化学科学与工程前沿（英文）》 2020年第14卷第4期页码 651-660 doi: 10.1007/s11705-019-1819-y

摘要： In this work, a thin zirconium-based UiO-66 membrane was successfully prepared on an alumina hollow fiber tube by flow synthesis, and was used in an attempt to remove -nitrophenol from water through a nanofiltration process. Two main factors, including flow rate and synthesis time, were investigated to optimize the conditions for membrane growth. Under optimal synthesis conditions, a thin UiO-66 membrane of approximately 2 µm in thickness was fabricated at a flow rate of 4 mL·h for 30 h. The -nitrophenol rejection rate for the as-prepared UiO-66 membrane applied in the removal of -nitrophenol from water was only 78.1% due to the existence of membrane defects caused by coordinative defects during membrane formation. Post-synthetic modification of the UiO-66 membrane was carried out using organic linkers with the same flow approach to further improve the nanofiltration performance. The result showed that the -nitrophenol rejection for the post-modified membrane was greatly improved and reached over 95%. Moreover, the post-modified UiO-66 membrane exhibited remarkable long-term operational stability, which is vital for practical application.

关键词： UiO-66 membrane flow synthesis nanofiltration p-nitrophenol removal

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降低树脂基碳纤维复合材料成本的工程途径

赵渠森

《中国工程科学》 2001年第3卷第9期页码 21-28

摘要：

树脂基复合材料已在航空航天工业中获得广泛应用。当今复合材料的低成本已是广泛议题。文章从工程角度讨论降低成本的有效途径，它们是通过改善树脂韧性提高设计许用应变，尽可能实现结构整体性，采用混杂复合材料结构，应用树脂渗透成形工艺和电子束固化技术。

关键词：买得起复合材料 BMI树脂整体共固化结构真空辅助树脂渗透

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Construction of defect-containing UiO-66/MoSe heterojunctions with superior photocatalytic performance

《化学科学与工程前沿（英文）》 2023年第17卷第4期页码 449-459 doi: 10.1007/s11705-022-2226-3

摘要： Metal–organic frameworks are recognized as promising multifunctional materials, especially metal–organic framework-based photocatalysts, which are considered to be ideal photocatalytic materials. Herein, a new type of UiO-66/MoSe₂ composite was prepared using the solvothermal method. The optimum composite was selected by adjusting the mass ratio of UiO-66 and MoSe₂. X-ray diffraction analysis showed that the mass ratio influenced the crystal plane exposure rate of the composite, which may have affected its photocatalytic performance. The composite is composed of ultra-thin flower-like MoSe₂ that wrapped around cubic UiO-66, a structure that increases the abundance of active sites for reactions and is more conducive to the separation of carriers. The photocatalytic properties of the composite were evaluated by measuring the degradation rate of Rhodamine B and the catalyst’s ability to reduce Cr(VI)-containing wastewater under visible light irradiation. Rhodamine B was decolorized completely in 120 min, and most of the Cr(VI) was reduced within 150 min. The photochemical mechanism of the complex was studied in detail. The existence of Mo⁶⁺ and oxygen vacancies, in addition to the Z-type heterojunction promote the separation of electrons and holes, which enhances the photocatalytic effect.

关键词： UiO-66/MoSe₂ photocatalysis dye-containing wastewater heavy metal wastewater oxygen vacancies

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我国高性能合成树脂发展战略研究

张丽平,杨学萍,初立秋,盛依依

《中国工程科学》 2020年第22卷第5期页码 121-127 doi: 10.15302/J-SSCAE-2020.05.011

摘要：

高性能合成树脂是支撑先进制造、新能源、电子信息等国家战略性新兴产业发展的关键基础材料。本文立足产业发展对高性能合成树脂的迫切需求，着眼我国合成树脂行业长远发展，采用文献调研、专家咨询等研究手段，从高性能聚烯烃树脂材料、其他高性能合成树脂材料两个方面，系统梳理了我国高性能合成树脂材料的技术发展趋势，凝练合成树脂工业面临的技术与装备相对落后、部分高端产品尚无国产化技术、基础理论与方法研究薄弱、解决废弃塑料污染环境问题动力不足等问题。在分析高性能合成树脂材料关键技术的基础上，研究提出行业发展建议：利用现有装备和技术开发高端产品，实现规模化应用；加强高性能材料领域基础研究和人才培养，保障技术创新；开发生物可降解塑料，促进可持续发展；加强

关键词：高性能合成树脂高性能聚烯烃产业趋势关键技术

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纳米技术在牙科复合树脂改良中的应用

夏阳,谢海峰,章非敏,顾宁

《中国工程科学》 2012年第14卷第3期页码 76-82

摘要：

以牙科复合树脂现存缺点为背景，对纳米技术对复合树脂的改良情况进行了研究，着重讨论了纳米材料对复合树脂的聚合收缩、抗菌性能和机械性能改良的一系列问题研究结果表明,使用纳米技术和材料可以很好地改进复合树脂多方面的性能，同时对复合树脂的发展方向和研究前景进行了展望。

关键词：纳米技术复合树脂抗菌聚合收缩机械性能

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淡水室填充阳离子交换树脂的EDI膜堆对镍离子溶液分离性能的研究

牛玉标,徐小青,赵海洋,周志军

《中国工程科学》 2014年第16卷第7期页码 62-67

摘要：

采用淡水室填充阳离子交换树脂的电去离子（EDI）膜堆来处理低浓度含镍废水，考察了该EDI 膜堆用于低浓度重金属废水处理的可行性，并探讨了膜堆电压和料液流量对EDI 分离重金属离子性能的影响。

关键词： EDI 阳离子交换树脂重金属镍离子

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Zr₆₆Al₉Cu₁₆Ni₉块体非晶合金制备工艺研究

阮许平,阮宏伟

《中国工程科学》 2004年第6卷第5期页码 76-78

摘要：

运用真空电弧炉熔炼合金制备试样，采用三种不同的方法对金属熔体进行处理，试样的X射线衍射晶化相分析结果表明，B₂O₃和Na₂SiO₃的混合物与所选组分的熔体发生了反应，不适合作Zr基合金的包裹物；组分为CaF₂(45%)，AlF₃(50%)，CaO(5%)以及微量的TiO₂的氟盐，由于该净化剂与所选的组分发生了反应，不适合Zr基合金的净化；设备的高真空度、原材料成分的高纯度是促进合金形成非晶态的重要因素。

关键词：块体非晶合金制备工艺玻璃熔盐真空度