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Anion exchange membranes with a semi-interpenetrating polymer network using 1,6-dibromohexane as bifunctional crosslinker

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CHINESE JOURNAL OF CHEMICAL ENGINEERING 2024年第8期72卷 199-208页

作者： Li, Aijie Wang, Zhanliang si, zhihao Lu, Lu Huang, Peipei Liu, Jinhong Yao, Songyuan Qin, Peiyong Zhang, Xinmiao Beijing Univ Chem Technol Coll Life Sci & Technol Natl Energy R&D Ctr Biorefinery Beijing 100029 Peoples R China Beijing Univ Chem Technol Paris Curie Engineer Sch Beijing 100029 Peoples R China Beijing Res Inst Chem Ind Environm Protect Res Inst Beijing 100000 Peoples R China

An anion exchange membrane (AEM) is generally expected to possess high ion exchange capacity (IEC), low water uptake (WU), and high mechanical strength when applied to electrodialysis desalination. Among different types of AEMs, semi-interpenetrating polymer networks (siPNs) have been suggested for their structural superiorities, i.e ., the tunable local density of ion exchange groups for IEC and the restrained leaching of hygroscopic groups by insolubility for WU. Unfortunately, the conventional siPN AEMs still struggle to balances IEC, WU, and mechanical strength simultaneously, due to the lack of the compact crosslinking region. In this work, we proposed a novel siPN structure of polyvinylidene difluoride/polyvinylimidazole/1,6-dibromohexane (PVDF/PVIm/DBH). On the one hand, DBH with two cationic groups of imidazole groups are introduced to enhance the ion conductivity, which is different from the conventional monofunctional modifier with only one cationic group. On the other hand, DBH has the ability to bridge with PVIm, where the mechanical strength of the resulting AEM is increased by the increase of crosslinking degree. Results show that a low WU of 38.1% to 62.6%, high IEC of 2.12-2.22 mmol center dot g-1,- 1 , and excellent tensile strength of 3.54-12.35 MPa for PVDF/PVIm/DBH membrane are achieved. This work opens a new avenue for achieving the high-quality AEMs. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Anion exchange membrane Polyvinylidene difluoride Electrodialysis Semi-interpenetrating polymer networks CATION-EXCHANGE WATER DESALINATION ELECTRODIALYsiS PERFORMANCE PURIFICATION RADIATION

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Anion exchange membranes with a semi-interpenetrating polymer network using 1,6-dibromohexane as bifunctional crosslinker

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Chinese Journal of Chemical Engineering 2024年第08期 199-208页

作者： Aijie Li Zhanliang Wang zhihao si Lu Lu Peipei Huang Jinhong Liu Songyuan Yao Peiyong Qin Xinmiao Zhang National Energy R&D Center for Biorefinery College of Life Science and Technology Beijing University of Chemical Technology Paris Curie Engineer School Beijing University of Chemical Technology Environmental Protection Research Institute Beijing Research Institute of Chemical Industry

An anion exchange membrane（AEM） is generally expected to possess high ion exchange capacity（IEC）,low water uptake（WU）, and high mechanical strength when applied to electrodialysis *** different types of AEMs, semi-interpenetrating polymer networks（siPNs） have been suggested for their structural superiorities, i.e., the tunable local density of ion exchange groups for IEC and the restrained leaching of hygroscopic groups by insolubility for WU. Unfortunately, the conventional siPN AEMs still struggle to balances IEC, WU, and mechanical strength simultaneously, due to the lack of the compact crosslinking region. In this work, we proposed a novel siPN structure of polyvinylidene difluoride/polyvinylimidazole/1,6-dibromohexane（PVDF/PVIm/DBH）. On the one hand, DBH with two cationic groups of imidazole groups are introduced to enhance the ion conductivity, which is different from the conventional monofunctional modifier with only one cationic group. On the other hand, DBH has the ability to bridge with PVIm, where the mechanical strength of the resulting AEM is increased by the increase of crosslinking degree. Results show that a low WU of 38.1% to 62.6%, high IEC of 2.12—2.22 mmol·g-1, and excellent tensile strength of 3.54—12.35 MPa for PVDF/PVIm/DBH membrane are achieved. This work opens a new avenue for achieving the high-quality AEMs.

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微晶纤维素/聚乙烯醇对明胶基复合薄膜性能的影响

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塑料工业 2024年第2期52卷 128-134页

作者：陈杰司志昊贾济如周伟许汉斌王文娟无锡学院环境工程学院江苏无锡210044 常熟工学院纺织服装与设计学院江苏苏州215500

聚乙烯醇(PVA)/明胶基材料具有良好的成膜性能和生物相容性,具有广泛的实际应用价值,是一个重要的研究对象。本研究将微晶纤维素(MCC)和PVA分别作为增强材料和共混材料添加到明胶(GL)基材中,改善明胶基复合薄膜的力学性能和阻隔性能。... 详细信息

聚乙烯醇(PVA)/明胶基材料具有良好的成膜性能和生物相容性,具有广泛的实际应用价值,是一个重要的研究对象。本研究将微晶纤维素(MCC)和PVA分别作为增强材料和共混材料添加到明胶(GL)基材中,改善明胶基复合薄膜的力学性能和阻隔性能。微晶纤维素的添加可赋予MCC/PVA/GL复合薄膜良好的理化性能和应用性能。当基材中添加质量分数5%MCC时,复合薄膜的拉伸强度由14.91 MPa提高到48.02 MPa,热降解温度提高了11.4℃,含水率降低了9.12%。同时,还延长了水蒸气通过PVA/GL薄膜的路径,降低了MCC/PVA/GL复合薄膜的水蒸气透过率。土壤包埋实验表明,MCC的加入加快了复合薄膜的生物降解性能。因此,MCC/PVA/GL复合薄膜可应用于绿色包装领域,如食品包装、药品包装、化妆品包装等。

关键词：聚乙烯醇微晶纤维素明胶复合薄膜绿色包装物化性能

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面向生物工程类专业的“生化仪器分析”课程教学建设与改革

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生物加工过程 2024年第4期22卷 447-453页

作者：司志豪卢璐蒋妮秦培勇北京化工大学生命科学与技术学院北京100029 北京化工大学巴黎居里工程师学院北京100029

“生化仪器分析”课程是生物工程类专业的核心课,具体内容包括多种仪器分析方法的基本原理、相关仪器构造以及定量和定性分析方法。为了解决课程教学过程中“仪器分析原理与方法脱节、课本知识偏离实际应用、缺乏科学家精神和创新意识... 详细信息

“生化仪器分析”课程是生物工程类专业的核心课,具体内容包括多种仪器分析方法的基本原理、相关仪器构造以及定量和定性分析方法。为了解决课程教学过程中“仪器分析原理与方法脱节、课本知识偏离实际应用、缺乏科学家精神和创新意识的培养”等问题,笔者从教学方法、产学研结合和课程思政三个方面改革创新。实践表明,通过以“一个中心和三个基本点”为教学主线,结合信息化手段和过程性考核,能够提升学习效率,强化基础知识积累;通过科研反哺教学,帮助学生树立职业规划,提高学习主动性;通过课程思政立体化、灵魂化,引发学生的情感触动。这可为其他生物工程类专业课程的教学提供借鉴。

关键词：生物工程生化仪器分析教学改革产学研结合课程思政

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Ultrathin polyamide nanofiltration membrane prepared by triazine-based porous organic polymer as interlayer for dye removal

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Chinese Journal of Chemical Engineering 2023年第5期57卷 193-201页

作者： Yongbo Liu zhihao si Cong Ren Hanzhu Wu Peng Zhan Yuqing Peng Peiyong Qin National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing 100029China College of Life Science and Technology Beijing University of Chemical TechnologyBeijing 100029China Beijing Key Laboratory of Membrane Science and Technology College of ChemicalEngineeringBeijing University of Chemical TechnologyBeijing 100029China

Separation membrane with high flux is generally encouraged in industrial application,because of the tremendous needs for decreasing membrane areas,usage costs and space *** most effective and direct method for obtaining the high flux is to decrease membrane ***(PA)nanofiltration membrane is conventionally prepared by the direct interfacial polymerization(IP)on substrate surface,and results in a thick PA *** this work,we proposed a strategy that constructing triazine-based porous organic polymer(TRZ-POP)as the interlayer to prepare the ultrathin PA nanofiltration ***-POP is firstly deposited on the polyethersulfone substrate,and then the formed TRZ-POP provides more adhesion sites towards PA based on its high specific surface *** chemical bonding between terminal amine group of TRZ-POP and the amide group of PA further improves the binding force,and strengthens the stability of PA *** importantly,the high porosity of TRZPOP layer causes the higher polymerization of initial PA owning to the stored sufficient amino monomer;and H-bonding interaction between amine groups of TRZ-POP and piperazine(PIP)can astrict the release of ***,IP process is controlled,and the thinnest thickness of prepared PA layer is only<15 *** expected,PA/TRZ-POP membrane shows a more excellent water flux of 1414 L·m^(-2)·h^(-1)·MPa^(-1)than that of the state-of-the-art nanofiltration membranes,and without sacrificing dye *** build of TRZPOP interlayer develops a new method for obtaining a high-flux nanofiltration membrane.

关键词： Polyamide Nanofiltration Interfacial polymerization Triazine-based porous organic polymer

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Nitrate removal to its fate in wetland mesocosm filled with sponge iron:Impact of influent COD/N ratio

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Frontiers of Environmental Science & Engineering 2020年第1期14卷 77-85页

作者： zhihao si Xinshan Song Xin Cao Yuhui Wang Yifei Wang Yufeng Zhao Xiaoyan Ge Awet Arefe Tesfahunegn College of Environmental Science and Engineering State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile IndustryDonghua UniversityShanghai 201620China

Sponge iron(s-Fe°)is a porous metal with the potential to be an electron donor for *** study aims to evaluate the feasibility of using s-Fe as the substrate of wetland ***,wetland mesocosms with the addition of s-Fe"particles(CW-Fc)and a blank control group(CW-CK)were *** NOj-N reduction property and water quality parameters(*** ORP)were examined at three COD/N ratios(*** 10).Results showed that the NO3--N removal efficiencies were significantly increased by 6.6 to 58.9%in the presence of s-Fe NH4+-N was mainly produced by chemical denitrification,and approximately 50% of the NO3--N was reduced to N4+-N,at the COD ratio of *** increase of the influent COD/N ratio resulted in lower chemical denitrification and higher *** chemical denitrification mediated by s-Fe led to an accumulation of NH4+-N at COD/N ratios of 0 and *** TIN removal efficiencies increased by 4.5#12.4#.Moreover,the effluent pll,*** ORP values showed a significant negative correlation with total Fe and Fe(II)(Psis indicated that Trichococctis(77.2%)was the most abundant microorganism in the CW-Fc mcsocosm,while Thauera,*** Herbaspirillum were the primary denitrifying *** denitrifiers,simplicispira,IXxhloronwnas,and *** the dominant bacteria for *** study provides a valuable method and an improved understanding of NOj-N reduction characteristics of s-Fc in a wetland mcsocosm.

关键词： Sponge iron Wetland mesocosm Electronic donor Denitrification COD/N ratio

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乳腺癌空间转录组数据集上基于深度学习的EnST算法研究

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内蒙古工业大学学报（自然科学版） 2024年第3期43卷 200-205页

作者：赵雅楠尹娜司志好尚文婧冯振兴内蒙古工业大学理学院呼和浩特010051

在保留空间位置和组织学图像的基础上,空间转录组学使用基因表达谱数据对组织结构和生物发育提出新的见解。准确识别位点的空间域是空间转录组学各种下游分析的重要步骤,提出的EnST算法在运用复合缩放网络的基础上,添加了变分图自编码器... 详细信息

在保留空间位置和组织学图像的基础上,空间转录组学使用基因表达谱数据对组织结构和生物发育提出新的见解。准确识别位点的空间域是空间转录组学各种下游分析的重要步骤,提出的EnST算法在运用复合缩放网络的基础上,添加了变分图自编码器,能够在空间转录组数据中提取有用信息。在人类乳腺癌空间转录组学数据集中,相比于其他算法,EnST算法可以更好地描绘乳腺癌精细的空间组织结构。此外,EnST学习到的表征在聚类、可视化、差异基因表达分析、GO功能分析等下游任务中也展现出强大的性能。

关键词：深度学习变分图自编码器乳腺癌空间域聚类

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Hierarchical ZnIn2S4 microspheres as photocatalyst for boosting the selective biohydrogenation of furfural into furfuryl alcohol under visible light irradiation

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Green Chemical Engineering 2022年第4期3卷 385-394页

作者： Hongqing Zhao Qian Zhu Yan Zhuang Peng Zhan Yanou Qi Wenqiang Ren zhihao si Di Cai Senshen Yu Peiyong Qin National Energy R&D Center for Biorefinery Beijing University of Chemical TechnologyBeijing100029China School of International Education Beijing University of Chemical TechnologyBeijing100029China Research Center for Eco-environmental Sciences Chinese Academy of ScienceBeijing100085China R&D Center Yunnan Yuntianhua Co.Ltd.No.1417th Dianchi Road650000KunmingChina College of Life Science and Technology Beijing University of Chemical TechnologyBeijing100029China

Photocatalyst-enzyme coupling process for visible light driven biotransformation holds promise in producing solar *** this work,aiming to produce furfuryl alcohol,the important bulk chemical that is typically derived from renewable lignocellulose,a highly selective furfural hydrogenation process is proposed by coordinating the alcohol dehydrogenase with the ZnIn2S4 assistant reduced form of nicotinamide adenine dinucleotid(NADH)*** indicated that under visible light irradiation,the hierarchical ZnIn2S4 microspheres exhibited excellent holes and electrons separating efficiency,affording to high NADH regeneration(yield of 90.2±3.28%).When adopting the photo-biocoupled reduction process in furfural transformation,a furfuryl alcohol yield of 79.4±1.95%was achieved under the optimized *** photocatalyst-enzyme coupling process also showed good stability,exceeding 70%of catalytic activity was reserved after reusing the catalysts for 10 *** novel photo-biocoupled system showed promising in extending to the highly selective hydrogenation of other biochemicals from lignocelluloses.

关键词： NADH regeneration Photobiocatalysis Furfural Furfuryl alcohol Selective hydrogenation

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On the low cycle fatigue behaviour of an Al-Zn-Mg-Cu alloy processed via non-isothermal ageing

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Journal of Materials Science & Technology 2024年第1期168卷 227-238页

作者： Guangyi Guo Guofu Xu Yuan Tang zhihao Zhao zhihao Yi Haoran Li Ruohan Wang Xiaoyan Peng School of Materials Science and Engineering Central South UniversityChangsha 410083China Key Laboratory of Nonferrous Materials Science and Engineering of Ministry of Education Changsha 410083China

The low cycle fatigue behaviour of an Al-Zn-Mg-Cu alloy processed via non-isothermal ageing(NIA)was examined at different strain *** showed that NIA improved the low cycle fatigue life(more than 7000 cycles)by optimising the precipitate configuration within 5.5 h while maintaining comparable mechanical properties(570 MPa for tensile strength)and conductivity(nearly 39%IACS)to conventional isothermal ageing,*** observation combined with molecular dynamic simula-tion revealed that precipitation configuration manipulated by NIA had a crucial effect on fatigue resis-tance.A great number of repeatedly sheared and locally destructed GP zones enhanced co-planar slip and slip localisation in the under-aged alloy during the early stage of NIA,responsible for the dramatic displacement steps on the surface and resultant poor fatigue *** the NIA further proceeded,moderately coarsened precipitates with an average dimension of 6.0 nm and elevated number density ef-fectively impeded the dislocation movement and weaken the slip localisation to a great extent,improving the fatigue performance within a few hours.

关键词： Non-isothermal ageing Fatigue Al-Zn-Mg-Cu alloy Precipitate manipulation Slip localization

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Examination of two-phase behaviors in porous media during pool boiling

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Science China(Technological Sciences) 2024年第6期67卷 1695-1713页

作者： ZHANG zhihao GUAN ShuYa WU Rui ZHAO ChangYing School of Mechanical Engineering Shanghai Jiao Tong University

The enhancement of pool boiling heat transfer using porous media has been extensively *** the two-phase distribution and evolution in porous media are crucial to the heat transfer performance,including the critical heat flux(CHF)and heat transfer coefficient(HTC),direct observation of the two-phase flow inside the media is limited owing to the blockage of the direct view from the porous *** this study,pool boiling visualization experiments were conducted on porous samples with different throat widths in deionized *** results showed that the HTC increased with the throat ***,the growth-contraction cycle of the vapor region and the formation and drying of the wall liquid film inside the porous media were *** vapor region,including the maximum and minimum areas in the boiling cycle,was quantitatively ***,the relationship between the minimum gas-phase area and HTC peak was identified.A one-dimensional transient model was developed considering solid skeleton heat conduction,liquid film evaporation,and vapor region growth to quantitatively study the influence of heat flux on the internal two-phase *** model successfully captured the maximum gas-phase area,duration of boiling cycles,and HTC trends at specific heat *** results of this quantitative study provide insights into the internal two-phase distribution and evolution induced by pool boiling.

关键词： porous media two-phase behaviors pool boiling

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