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复合材料 5

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a smart potassium ion-responsive copolymer into polysulfone support membrane on the performance of thin-filmcomposite nanofiltration membrane

Meibo He, Zhuang Liu, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

《化学科学与工程前沿(英文)》 2019年 第13卷 第2期   页码 400-414 doi: 10.1007/s11705-018-1757-0

摘要: Thin-film composite (TFC) nanofiltration (NF) membranes were fabricated via the interfacial polymerization of piperazine (PIP) and 1,3,5-benzenetricarbonyl trichloride on polysulfone (PSf) support membranes blended with K -responsive poly( -isopropylacryamide-co-acryloylamidobenzo-15-crown-5) (P(NIPAM-co-AAB C )). Membranes were characterized by attenuated total reflection Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, atomic force microscope, scanning electron microscope, contact angle, and filtration tests. The results showed that: (1) Under K -free conditions, the blended P(NIPAM-co-AAB C )/PSf supports had porous and hydrophilic surfaces, thereby producing NF membranes with smooth surfaces and low MgSO rejections; (2) With K in the PIP solution, the surface roughness and water permeability of the resultant NF membrane were increased due to the K -induced transition of low-content P(NIPAM-co-AAB C ) from hydrophilic to hydrophobic; (3) After a curing treatment at 95 °C, the improved NF membrane achieved an even higher pure water permeability of 10.97 L·m ·h ·bar under 200 psi. Overall, this study provides a novel method to improve the performance of NF membranes and helps understand the influence of supports on TFC membranes.

关键词: nanofiltration     interfacial polymerization     support membrane     potassium ion-responsive     thin-film composite    

Tuning the primary selective nanochannels of MOF thin-film nanocomposite nanofiltration membranes for

《环境科学与工程前沿(英文)》 2022年 第16卷 第4期 doi: 10.1007/s11783-021-1474-7

摘要:

• PA layer properties tune the primary nanochannels in MIL-101(Cr) TFN NF membranes.

关键词: Porous metal organic framework     Thin-film nanocomposite membrane     Primary selective nanochannels     Nanofiltration     Endocrine disrupting compounds    

Recent development and application of thin-film thermoelectric cooler

Yuedong Yu, Wei Zhu, Xixia Kong, Yaling Wang, Pengcheng Zhu, Yuan Deng

《化学科学与工程前沿(英文)》 2020年 第14卷 第4期   页码 492-503 doi: 10.1007/s11705-019-1829-9

摘要: Recently, the performance and fabrication of thin-film thermoelectric materials have been largely enhanced. Based on this enhancement, the thin-film thermoelectric cooler (TEC) is becoming a research hot topic, due to its high cooling flux and microchip level size. To fulfill a thin-film TEC, interfacial problems are unavoidable, as they may largely reduce the properties of a thin-film TEC. Moreover, the architecture of a thin-film TEC should also be properly designed. In this review, we introduced the enhancement of thermoelectric properties of (Bi,Sb) (Te,Se) solid solution materials by chemical vapor deposition, physical vapor deposition and electrodeposition. Then, the interfacial problems, including contact resistance, interfacial diffusion and thermal contact resistance, were discussed. Furthermore, the design, fabrication, as well as the performance of thin-film TECs were summarized.

关键词: thin-film thermoelectric cooler     interfaces     cooling flux     TE device fabrication    

Thin-film composite forward osmosis membranes with substrate layer composed of polysulfone blended with

Baicang Liu,Chen Chen,Pingju Zhao,Tong Li,Caihong Liu,Qingyuan Wang,Yongsheng Chen,John Crittenden

《化学科学与工程前沿(英文)》 2016年 第10卷 第4期   页码 562-574 doi: 10.1007/s11705-016-1588-9

摘要: To advance commercial application of forward osmosis (FO), we investigated the effects of two additives on the performance of polysulfone (PSf) based FO membranes: one is poly(ethylene glycol) (PEG), and another is PSf grafted with PEG methyl ether methacrylate (PSf-g-PEGMA). PSf blended with PEG or PSf-g-PEGMA was used to form a substrate layer, and then polyamide was formed on a support layer by interfacial polymerization. In this study, NaCl (1 mol?L ) and deionized water were used as the draw solution and the feed solution, respectively. With the increase of PEG content from 0 to 15 wt-%, FO water flux declined by 23.4% to 59.3% compared to a PSf TFC FO membrane. With the increase of PSf-g-PEGMA from 0 to 15 wt-%, the membrane flux showed almost no change at first and then declined by about 52.0% and 50.4%. The PSf with 5 wt-% PSf-g-PEGMA FO membrane showed a higher pure water flux of 8.74 L?m ?h than the commercial HTI membranes (6–8 L?m ?h ) under the FO mode. Our study suggests that hydrophobic interface is very important for the formation of polyamide, and a small amount of PSf-g-PEGMA can maintain a good condition for the formation of polyamide and reduce internal concentration polarization.

关键词: thin-film composite     forward osmosis     amphiphilic copolymer     interfacial polymerization     poly(ethylene glycol)    

Surface-tailoring chlorine resistant materials and strategies for polyamide thin film composite reverse

《化学科学与工程前沿(英文)》 2022年 第16卷 第5期   页码 564-591 doi: 10.1007/s11705-021-2109-z

摘要: Polyamide thin film composite membranes have dominated current reverse osmosis market on account of their excellent separation performances compared to the integrally skinned counterparts. Despite their very promising separation performance, chlorine-induced degradation resulted from the susceptibility of polyamide toward chlorine attack has been regarded as the Achilles’s heel of polyamide thin film composite. The free chlorine species present during chlorine treatment can impair membrane performance through chlorination and depolymerization of the polyamide selective layer. From material point of view, a chemically stable membrane is crucial for the sustainable application of membrane separation process as it warrants a longer membrane lifespan and reduces the cost involved in membrane replacement. Various strategies, particularly those involved membrane material optimization and surface modifications, have been established to address this issue. This review discusses membrane degradation by free chlorine attack and its correlation with the surface chemistry of polyamide. The advancement in the development of chlorine resistant polyamide thin film composite membranes is reviewed based on the state-of-the-art surface modifications and tailoring approaches which include the in situ and post-fabrication membrane modifications using a broad range of functional materials. The challenges and future directions in this field are also highlighted.

关键词: reverse osmosis     polyamide     thin film composite membranes     chlorine resistance     surface modification    

mesoporous silica nanoparticle with 4-triethoxysilylaniline to enhance seawater desalination properties of thin-film

Jian Wang, Qun Wang, Xueli Gao, Xinxia Tian, Yangyang Wei, Zhen Cao, Chungang Guo, Huifeng Zhang, Zhun Ma, Yushan Zhang

《环境科学与工程前沿(英文)》 2020年 第14卷 第1期 doi: 10.1007/s11783-019-1185-5

摘要: Mesoporous silica nanoparticle was modified with 4-triethoxysilylaniline. AMSN-based TFN-RO membranes were prepared for seawater desalination. Water transport capability of the AMSN was limited by polyamide. Polyamide still plays a key role in permeability of the TFN RO membranes. Mesoporous silica nanoparticles (MSN), with higher water permeability than NaA zeolite, were used to fabricate thin-film nanocomposite (TFN) reverse osmosis (RO) membranes. However, only aminoalkyl-modified MSN and low-pressure (less than 2.1 MPa) RO membrane were investigated. In this study, aminophenyl-modified MSN (AMSN) were synthesized and used to fabricate high-pressure (5.52 MPa) RO membranes. With the increasing of AMSN dosage, the crosslinking degree of the aromatic polyamide decreased, while the hydrophilicity of the membranes increased. The membrane morphology was maintained to show a ridge-and-valley structure, with only a slight increase in membrane surface roughness. At the optimum conditions (AMSN dosage of 0.25 g/L), when compared with the pure polyamide RO membrane, the water flux of the TFN RO membrane (55.67 L/m2/h) was increased by about 21.6%, while NaCl rejection (98.97%) was slightly decreased by only 0.29%. However, the water flux of the membranes was much lower than expected. We considered that the enhancement of RO membrane permeability is attributed to the reduction of the effective thickness of the PA layer.

关键词: Thin film nanocomposite membrane     Reverse osmosis     Seawater desalination     Aminophenyl-functionalized mesoporous silica nanoparticles    

Fabrication of titania thin film with composite nanostructure and its ability to photodegrade rhodamine

ZHANG Gaojie, WU Jinming, LIU Shaoguang, YAN Mi

《化学科学与工程前沿(英文)》 2008年 第2卷 第1期   页码 44-48 doi: 10.1007/s11705-008-0001-8

摘要: A titania nanorod film was synthesized by direct oxidation of metallic Ti with hydrogen peroxide solution under a low temperature. Titania nanoparticles were then filled into the gaps among the nanorods through an infiltration sol-gel procedure to form a composite titania film with an ordered nanostructure. X-ray diffraction spectra indicate that the composite film was a mixture of anatase and rutile while the titania film obtained by only using a sol-gel procedure was pure anatase. Field emission scanning electron microscopy observations show that titania nanoparticles were embedded into the titania nanorod film. Photoluminescence spectra suggest the enhanced separation of electron and hole pairs for the obtained composite titania film over the corresponding titania nanorod film. The composite titania film exhibited improved ability to photodegrade rhodamine B in water compared with the titania nanorod film. The apparent photodegradation rate constant, fitting a pseudo-first-order, was 3 times of that obtained by the sol-gel derived titania film at the same weight. The improved photocatalytic activity for the composite titania film could be attributed to the enhanced separation of electron and hole pairs due to the embedding of the titania nanoparticles within the titania nanorods.

关键词: constant     weight     apparent photodegradation     hydrogen     nanorod    

基于Cu(In,Ga)Se2 低成本薄膜的光伏技术的进展

Powalla Michael,Paetel Stefan,Hariskos Dimitrios,Wuerz Roland,Kessler Friedrich,Lechner Peter,Wischmann Wiltraud,Magorian Friedlmeier Theresa

《工程(英文)》 2017年 第3卷 第4期   页码 445-451 doi: 10.1016/J.ENG.2017.04.015

摘要:

本文讨论了基于Cu(In,Ga)Se 2 (CIGS) 复合薄膜半导体材料的光伏(PV)技术。主要内容包括CIGS技术与传统的晶体硅技术的总体比较、CIGS 技术基础、一种柔性CIGS 电池产品破世界纪录的转化效率,以及在生产、应用和稳定性方面的突出表现和良好的发展前景。CIGS 技术极具潜力,若能实现大规模量产,将成为所有光伏清洁发电技术中成本最低的一种技术。

关键词: 薄膜光伏     太阳能     柔性     Cu(In     Ga)Se2    

Theoretical analysis and experimental study on the influence of electric double layer on thin film lubrication

WANG Xin-jie, BAI Shao-xian, HUANG Ping

《机械工程前沿(英文)》 2006年 第1卷 第3期   页码 370-373 doi: 10.1007/s11465-006-0040-0

摘要: A new mathematical model for thin film lubrication is established by taking into account the effect of an electric double layer. In the present paper, experiments are carried out on a self-made tester. With a composite block and a

关键词: mathematical     account     electric     composite     lubrication    

Fabrication of Si-based three-dimensional microbatteries: A review

Chuang YUE, Jing LI, Liwei LIN

《机械工程前沿(英文)》 2017年 第12卷 第4期   页码 459-476 doi: 10.1007/s11465-017-0462-x

摘要:

High-performance, Si-based three-dimensional (3D) microbattery systems for powering micro/nano-electromechanical systems and lab-on-chip smart electronic devices have attracted increasing research attention. These systems are characterized by compatible fabrication and integratibility resulting from the silicon-based technologies used in their production. The use of support substrates, electrodes or current collectors, electrolytes, and even batteries used in 3D layouts has become increasingly important in fabricating microbatteries with high energy, high power density, and wide-ranging applications. In this review, Si-based 3D microbatteries and related fabrication technologies, especially the production of micro-lithium ion batteries, are reviewed and discussed in detail in order to provide guidance for the design and fabrication.

关键词: three-dimensional (3D)     wafer-scale     Si-based anode     micro-LIBs     thin-film deposition    

Thin-liquid-film evaporation at contact line

Hao WANG, Zhenai PAN, Zhao CHEN

《能源前沿(英文)》 2009年 第3卷 第2期   页码 141-151 doi: 10.1007/s11708-009-0020-2

摘要: When a liquid wets a solid wall, the extended meniscus near the contact line may be divided into three regions: a nonevaporating region, where the liquid is adsorbed on the wall; a transition region or thin-film region, where effects of long-range molecular forces (disjoining pressure) are felt; and an intrinsic meniscus region, where capillary forces dominate. The thin liquid film, with thickness from nanometers up to micrometers, covering the transition region and part of intrinsic meniscus, is gaining interest due to its high heat transfer rates. In this paper, a review was made of the researches on thin-liquid-film evaporation. The major characteristics of thin film, thin-film modeling based on continuum theory, simulations based on molecular dynamics, and thin-film profile and temperature measurements were summarized.

关键词: meniscus     thin film     contact line     disjoining pressure     evaporation    

薄膜润滑研究的回顾与展望

雒建斌,张朝辉,温诗铸

《中国工程科学》 2003年 第5卷 第7期   页码 84-89

摘要:

薄膜润滑是20世纪90年代以来广泛研究的新型润滑状态。它是界于弹流润滑和边界润滑之间的一种过渡润滑状态,有着自己独特的润滑规律。文章回顾了薄膜润滑的研究历史,包括薄膜润滑概念的提出、测试技术的发展、薄膜润滑的膜厚特性、润滑机理探索以及计算理论等方面的研究成果与主要进展。

关键词: 薄膜润滑     有序膜     膜厚测量     微结构    

The effect of altering crosslinker chemistry during interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants removal

《化学科学与工程前沿(英文)》 2023年 第17卷 第12期   页码 2025-2036 doi: 10.1007/s11705-023-2356-2

摘要: Chemistry of the polyamide active layer of a desalination membrane is critical in determining both its physical and chemical properties. In this study, we designed and fabricated three novel membranes with different active layers using the crosslinkers: terephthaloyl chloride, isophthaloyl chloride, and trimesoyl chloride. The crosslinkers were reacted with an aqueous solution of an aliphatic tetra-amine. Because these crosslinkers differ in their structures and crosslinking mechanisms during interfacial polymerization, the resultant membranes also possess different structural properties. The water contact angle of the fabricated membranes also varies; the water contact angles of 4A-3P-TPC@PSF/PET, 4A-3P-TMC@PSF/PET, and 4A-3P-IPC@PSF/PET, are 68.9°, 65.6°, and 53.9°, respectively. Similarly, the desalination performance of resultant membranes also showed variations, with 4A-3P-TPC@PSF/PET, 4A-3P-IPC@PSF/PET, and 4A-3P-TMC@PSF/PET having a permeate flux of 17.14, 25.70, and 30.90 L·m−2·h−1, respectively, at 2.5 MPa. The 4A-3P-TPC@PSF/PET membrane exhibited extensive crosslinking with aliphatic linear amine, and cationic dye rhodamine B, MgCl2, and amitriptyline rejection rates of 98.6%, 92.7% and 80.9%, respectively. The 4A-3P-TMC@PSF/PET membrane showed mediocre performance, while 4A-3P-IPC@PSF/PET membrane showed even lower performance, with a 35% rejection of methyl orange dye.

关键词: acid chlorides     covalent crosslinking     desalination     linear aliphatic amine     micropollutant removal     thin film composite membranes    

碱金属掺杂对CIGS 薄膜及电池器件的影响

孙云,林舒平,李伟,程世清,张运祥,刘一鸣,刘玮

《工程(英文)》 2017年 第3卷 第4期   页码 452-459 doi: 10.1016/J.ENG.2017.04.020

摘要:

本文总结了Cu(In, Ga)Se2 (CIGS) 电池中掺杂碱金属的发展历史和一些重要成果,综述了碱金属掺杂方式对CIGS 吸收层及器件性能的影响。通过分析由(NaF+KF)-PDT 导致的CIGS 表面结构及电学性能的改变,我们提出并解释了如下几个问题:①在低温沉积CIGS 薄膜过程中,Na 促进了CuInSe2的优先形成,排挤Ga 向Mo 衬底扩散,造成CIGS 薄膜的分层现象;② Na 原子钝化CIGS 晶界及表面缺陷从而提高空穴载流子浓度的相关机制;③过渡层减薄提高了短路电流(JSC)而不产生开路电压(VOC)损失,这不仅归因于化学浴沉积初期过渡层较好的包覆性,还在于受主缺陷VCu 转型为施主缺陷CdCu+时密度的增加,强化了同质浅埋结;④ (NaF+KF)-PDT 使CIGS 吸收层表面价带降低,进一步抑制了CIGS 吸收层和过渡层界面的复合,是提高电池开路电压与填充因子的重要原因。

关键词: 碱金属     Cu(In     Ga)Se2     薄膜太阳能电池     PDT    

Ni-Ti-Cu-V四元薄膜库中微观结构和相变的组合合成和高通量表征 Article

Naila M. Al Hasan, Huilong Hou, Suchismita Sarkar, Sigurd Thienhaus, Apurva Mehta, Alfred Ludwig, Ichiro Takeuchi

《工程(英文)》 2020年 第6卷 第6期   页码 637-643 doi: 10.1016/j.eng.2020.05.003

摘要:

过去70年来,基于Ni-Ti的形状记忆合金(shape memory alloy, SMA)已得到广泛使用,但是提高 其功能稳定性仍然是实现更稳健和更高级应用的关键。SMA因其能够通过可逆的马氏体转变来保 持加工后的形状而得名,它对成分的变化非常敏感。因此,用三元和四元元素合金化来微调SMA 的晶格参数和热滞,成为材料研究中的一个难题。组合材料科学允许从多种表征技术中简化合成 过程和数据管理。本研究采用磁控溅射的方法,在热氧化的硅晶片上制备了具有成分分布的Ni-TiCu-V薄膜库。使用高通量波长色散光谱、同步加速器X射线衍射和温度相关的电阻,测量研究并 确定了成分相关的相变温度和微观结构。在材料库的177种成分中,有32种成分具有形状记忆效应, 其中5种成分具有零或接近零的热滞效应。应用中,这些合金成分在给定工作温度范围内提供了选 择的灵活性。结合薄膜库的局部微观结构和组成,讨论了四元体系的相图和功能特性的相关性。 

关键词: Ni–Ti–Cu–V合金     组合材料科学     四元合金     形状记忆合金     薄膜库     弹性冷却     热弹性冷却     相变     高通量表征     属性映射     机器学习    

标题 作者 时间 类型 操作

a smart potassium ion-responsive copolymer into polysulfone support membrane on the performance of thin-filmcomposite nanofiltration membrane

Meibo He, Zhuang Liu, Tong Li, Chen Chen, Baicang Liu, John C. Crittenden

期刊论文

Tuning the primary selective nanochannels of MOF thin-film nanocomposite nanofiltration membranes for

期刊论文

Recent development and application of thin-film thermoelectric cooler

Yuedong Yu, Wei Zhu, Xixia Kong, Yaling Wang, Pengcheng Zhu, Yuan Deng

期刊论文

Thin-film composite forward osmosis membranes with substrate layer composed of polysulfone blended with

Baicang Liu,Chen Chen,Pingju Zhao,Tong Li,Caihong Liu,Qingyuan Wang,Yongsheng Chen,John Crittenden

期刊论文

Surface-tailoring chlorine resistant materials and strategies for polyamide thin film composite reverse

期刊论文

mesoporous silica nanoparticle with 4-triethoxysilylaniline to enhance seawater desalination properties of thin-film

Jian Wang, Qun Wang, Xueli Gao, Xinxia Tian, Yangyang Wei, Zhen Cao, Chungang Guo, Huifeng Zhang, Zhun Ma, Yushan Zhang

期刊论文

Fabrication of titania thin film with composite nanostructure and its ability to photodegrade rhodamine

ZHANG Gaojie, WU Jinming, LIU Shaoguang, YAN Mi

期刊论文

基于Cu(In,Ga)Se2 低成本薄膜的光伏技术的进展

Powalla Michael,Paetel Stefan,Hariskos Dimitrios,Wuerz Roland,Kessler Friedrich,Lechner Peter,Wischmann Wiltraud,Magorian Friedlmeier Theresa

期刊论文

Theoretical analysis and experimental study on the influence of electric double layer on thin film lubrication

WANG Xin-jie, BAI Shao-xian, HUANG Ping

期刊论文

Fabrication of Si-based three-dimensional microbatteries: A review

Chuang YUE, Jing LI, Liwei LIN

期刊论文

Thin-liquid-film evaporation at contact line

Hao WANG, Zhenai PAN, Zhao CHEN

期刊论文

薄膜润滑研究的回顾与展望

雒建斌,张朝辉,温诗铸

期刊论文

The effect of altering crosslinker chemistry during interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants removal

期刊论文

碱金属掺杂对CIGS 薄膜及电池器件的影响

孙云,林舒平,李伟,程世清,张运祥,刘一鸣,刘玮

期刊论文

Ni-Ti-Cu-V四元薄膜库中微观结构和相变的组合合成和高通量表征

Naila M. Al Hasan, Huilong Hou, Suchismita Sarkar, Sigurd Thienhaus, Apurva Mehta, Alfred Ludwig, Ichiro Takeuchi

期刊论文