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Covalent organic frameworks-incorporated thin film composite membranes prepared by interfacial polymerization for efficient CO_(2) separation

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Chinese Journal of Chemical Engineering 2022年第3期35卷 152-160页

作者： Haoqing Xu Wenyan Feng menglong sheng Ye Yuan Bo Wang Jixiao Wang Zhi Wang Chemical Engineering Research Center School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Tianjin Key Laboratory of Membrane Science and Desalination Technology State Key Laboratory of Chemical EngineeringCollaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300350China Life and Health Research Institute School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

Thin film composite(TFC)membranes with nanofillers additives for CO_(2)separation show promising applications in energy and environment-related ***,the poor compatibility between nanofillers and polymers in TFC membranes is the main *** this work,covalent organic frameworks(COFs,TpPa-1)with rich ANHA groups were incorporated into polyamide(PA)segment via in situ interfacial polymerization to prepare defect-free TFC membranes for CO_(2)/N_(2)*** formed covalent bonds between TpPa-1 and PA strengthen the interaction between nanofillers and polymers,thereby enhancing ***,the incorporated COFs disturb the rigid structure of the PA layer,and provide fast CO_(2)transfer *** incorporated COFs also increase the content of effective carriers,which enhances the CO_(2)facilitated ***,in CO_(2)/N_(2)mixed gas separation test,the optimal TFC(TpPa_(0.025)-PIP-TMC/m PSf)membrane exhibits high CO_(2)permeance of 854 GPU and high CO_(2)/N_(2)selectivity of 148 at 0.15 MPa,CO_(2)permeance of 456 GPU(gas permeation unit)and CO_(2)/N_(2)selectivity of 92 at 0.5 *** addition,the Tp Pa_(0.025)-PIP-TMC/m PSf membrane also achieves high permselectivty in CO_(2)/CH_(4)mixed gas separation ***,the optimal TFC membrane showes good stability in the simulated flue gas test,revealing the application potential for CO_(2)capture from flue gas.

关键词： Covalent organic frameworks CO_(2)/N_(2)separation In situ interfacial polymerization Compatibility Covalent bonds

Synthesis and optimization of high-performance amine-based polymer for CO_(2) separation

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Chinese Journal of Chemical Engineering 2022年第10期50卷 168-176页

作者： Ye Yuan Yurui Pan menglong sheng Guangyu Xing Ming Wang Jixiao Wang Zhi Wang Chemical Engineering Research Center School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Tianjin Key Laboratory of Membrane Science and Desalination Technology State Key Laboratory of Chemical EngineeringCollaborative Innovation Center of Chemical Science and EngineeringHaihe Laboratory of Sustainable Chemical TransformationsTianjin UniversityTianjin 300350China College of Chemical Engineering and Safety Binzhou UniversityEngineering Research Center for Industrial Wastewater Treatment and Reuse of Shandong ProvinceBinzhou 256600China

Membrane technology features inspiring excellence from numerous separation technologies for CO_(2) capture from post-combustion ***(PVAm)-based facilitated transport membranes show significantly high separation performance,which has been proven promising for industrial ***,commercialized PVAm with low molecular weight and excessive crystallinity is not available to prepare high-performance ***,the synthesis process of PVAm was optimized by regulating polymerization and acidic hydrolytic *** membranes based on PVAm with a molecular weight of 154 kDa and crystallinity of 11.37%display high CO_(2) permeance of 726 GPU and CO_(2)/N_(2) selectivity of 55 at a feed gas pressure of 0.50 ***,we established a PVAm synthesis reactor with an annual PVAm solution(1%(mass))capacity of over 7000 kg and realized the scaled-up manufacture of both PVAm and composite membranes.

关键词： CO_(2)/N_(2)separation Polyvinylamine Polymeric membranes Facilitated transportmembranes

Coupling Coordination Analysis of Cropland Intensification and Agroecosystem Services:Evidence from Loess Plateau in Shaanxi Province,China

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Chinese Geographical Science 2024年第3期34卷 401-419页

作者： FU Shaowu FU Mengyu QIU menglong Center for Land Resource Research in Northwest China Shaanxi Normal UniversityXi’an 710119China

One of the greatest challenges in the agroecosystem is to improve cropland intensification while preserving agroecosystem *** many studies have investigated the effect of cropland intensification on agroecosystem service,the interactive coupling and coordination among these factors remain largely *** view of this,this study performed a case study of the Loess Plateau in Shaanxi Province,China and constructed comprehensive evaluation models to quantify the cropland intensification and agroecosystem service in this *** analysis and the coupling coordination degree model were used to evaluate the interactive relationship between cropland intensification and agroecosystem service,and statistical analysis and spatial autocorrelation were used to analyze the spatial characteristics and potential mechanism of the coupling *** show that both the cropland intensification and agroecosystem service in the study area were relatively low yet gradually increased from 2000 to *** service lag was identified as the dominant unbalanced development *** the supply capacity of agroecosystem services plays a key role in the balanced development of cropland in the Loess *** coupling coordination degree between cropland intensification and agroecosystem service ranges from basic coordination to serious ***,cropland intensification practices in the area should be optimized to enhance this coordination *** upward trend was also observed in the coupling coordination degree from2000 to *** withdrawal of marginal cropland in the Grain for Green program is one of the most important reasons for this trend,especially for the northern *** 83.6%of the high-high clusters are concentrated in the southern region of the Loess Plateau,whereas 70.5%of the low-low clusters are distributed in the northern *** clustering characteristics are mainly attributed to the environmental

关键词： cropland intensification agroecosystem services balance analysis coupling coordination degree Loess Plateau,China

Analysis on influencing factors of detecting chemical oxygen demand in water by three-dimensional spectroscopy

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Optoelectronics Letters 2024年第1期20卷 42-47页

作者： ZHOU Kunpeng LIU Zhiyang CONG menglong MAN Shanxin Inner Mongolia Autonomous Region Joint Laboratory of Nuclear and Radiation Detection College of Physics and Electronic InformationInner Mongolia Minzu UniversityTongliao 028000China College of Information Engineering Jingzhou UniversityJingzhou 434000China Alxa League Meteorological Bureau Alxa 750300China

This paper focuses on the standard chemical oxygen demand(COD)liquid and studies the impact of pH,nitrite nitrogen,nitrate nitrogen,heavy metals,salinity,and other factors on fluorescence intensity and fluorescence peak positions during the detection of COD in water using fluorescence *** influence mechanisms of different environmental factors on fluorescence spectra are also *** indicate that pH value affects the fluorescence emission wavelength(Em),resulting in a red shift from 1.5 to 7.2,and a blue shift from 7.2 to *** nitrogen can react with organic matter in water to form nitro compounds,leading to a decrease in fluorescence *** has a negligible effect on T1 peak but a relatively large effect on T2 *** metal ion concentration has a significant impact on T2 peak,while T1 peak position shifts with an increase in heavy metal *** study aims to explore the factors that can impact the detection of COD in water using three-dimensional fluorescence spectrometry,providing references to improve accuracy and practicability for COD detection based on three-dimensional fluorescence spectrometry.

关键词： chemical negligible nitrate

Dielectric response of ANb_(2)O_(6)(A = Zn, Co, Mn, Ni) columbite niobates: From microwave to terahertz

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Journal of Advanced Ceramics 2024年第8期13卷 1189-1197页

作者： Weijia Luo Shun Wang Siyong Zheng Jining Li menglong Wang Yongzheng Wen ingxia Li Ji Zhou State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Institute of Laser and Optoelectronics School of Precision Instrument and Opto-Electronics EngineeringTianjin UniversityTianjin 300072China Shandong Inspur Artificial Intelligence Research Institute Co. Ltd.Jinan 250013China School of Microelectronics Tianjin UniversityTianjin 300072China

In the upcoming 6-generation(6G)revolution,the achievement of low power consumption has become a key objective in research concerning terahertz *** an important component of passive devices,there are very few low-loss dielectric ceramics in the terahertz *** elucidate the mechanism of loss and promote the application of microwave dielectric ceramics for future 6G technology(covering microwave and terahertz frequencies),the terahertz responses of ANb_(2)O_(6)(A=Zn,Co,Mn,and Ni)columbite niobates were *** influences of magnetic loss on the Qxf values in the microwave range with different transition metal ions in the A-site were reasonably ***,due to the weakened magnetic relaxation properties in the terahertz range,the samples all exhibited low loss and approximate transparency,especially for MnNb_(2)O_(6) and NiNb_(2)O_(6)(tano<0.01 and absorption coefficient<10 cm^(-1) below 1.2 THz),which subverted the definition of traditional low-loss microwave dielectric ***,based on Mie theory,we designed a prototypical broadband metamaterial reflector to validate the applicability of the ANb_(2)O_(6) system in the terahertz band,which is highly important for the development of terahertz ceramic-based passive devices.

关键词： columbite niobates terahertz response transition metal ions magnetic loss ceramic-based metamaterials

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膜法碳捕集技术--研究现状及展望

化工进展 2022年第3期41卷 1097-1101页

作者：王志原野生梦龙李庆华天津大学化工学院化学工程研究所天津市膜科学与海水淡化技术重点实验室化学工程联合国家重点实验室(天津大学)天津化学化工协同创新中心天津300350

碳捕集是实现CO_(2)减排的重要技术手段之一。在众多碳捕集技术中,膜分离技术具有操作简单、能耗低、环境污染小等优势,吸引了广泛关注。完整的膜法捕集CO_(2)技术研究链条包括膜材料开发、分离膜规模化制备、膜组件研制和膜分离工艺及... 详细信息

碳捕集是实现CO_(2)减排的重要技术手段之一。在众多碳捕集技术中,膜分离技术具有操作简单、能耗低、环境污染小等优势,吸引了广泛关注。完整的膜法捕集CO_(2)技术研究链条包括膜材料开发、分离膜规模化制备、膜组件研制和膜分离工艺及装置的设计建造。本文针对膜法碳捕集技术链的四个环节,总结对比了国内外技术水平和研究进展,分析了碳捕集膜从实验室研究到工业放大的瓶颈问题,并对本文作者课题组在各个技术环节所积累的研究成果进行了综述。在此基础上,对进一步提高膜法碳捕集技术水平的研究方向进行了展望。

关键词：二氧化碳分离膜碳捕集膜组件膜分离工艺工业化

Enhancing the Trustworthiness of 6G Based on Trusted Multi-Cloud Infrastructure:A Practice of Cryptography Approach

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工程与科学中的计算机建模(英文) 2024年第1期138卷 957-979页

作者： Mingxing Zhou Peng Xiao Qixu Wang Shuhua Ruan Xingshu Chen menglong Yang School of Cyber Science and Engineering Sichuan UniversityChengdu610207China Cyber Science Research Institute Sichuan UniversityChengdu610207China Information Center China Southern Power Grid Yunnan Power Grid Co.Ltd.Kunming650000China School of Aeronautics and Astronautics Sichuan UniversityChengdu610065China*Corresponding Author:QixuWang.Email:qixuwang@***

Due to the need for massive device connectivity,low communication latency,and various customizations in 6G architecture,a distributed cloud deployment approach will be more relevant to the space-air-ground-sea integrated network ***,the openness and heterogeneity of the 6G network cause the problems of network *** improve the trustworthiness of 6G networks,we propose a trusted computing-based approach for establishing trust relationships inmulti-cloud *** proposed method shows the relationship of trust based on dual-level *** separates the trustworthy states of multiple complex cloud units in 6G architecture into the state within and between cloud ***,SM3 algorithm establishes the chain of trust for the system’s trusted boot ***,the remote attestation server(RAS)of distributed cloud units verifies the physical ***,the physical servers use a ring approach to verify the cloud ***,the centralized RAS takes one-time authentication to the critical evidence information of distributed cloud unit ***,the centralized RAS also verifies the evidence of distributed *** establish our proposed approach in a natural OpenStack-based cloud *** simulation results show that the proposed method achieves higher security with less than a 1%system performance loss.

关键词： 6G multi-cloud trusted Infrastructure remote attestation commercial cipher

Prenatal Environmental Antibiotic Exposure and Autism Spectrum Disorder Symptoms in Children at 3 Years of Age:Findings from the Ma’anshan Birth Cohort Study

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Environment & Health 2024年第9期2卷 651-660页

作者： Baolin Wang Feifei Han Peng Ding Juan Tong Kaiyong Liu Shuangqin Yan sheng Wang Guanjun Chen Xiaoyan Wu Kun Huang menglong Geng Fangbiao Tao School of Public Health Anhui Medical UniversityHefei 230032 AnhuiChina Key Laboratory of Population Health Across Life Cycle(Anhui Medical University) Ministry of Education of the People’s Republic of ChinaHefei 230032 AnhuiChina NHC Key Laboratory of Study on Abnormal Gametes and Reproductive Tract(Anhui Medical University) Hefei 230032 AnhuiChina Anhui Provincial Key Laboratory of Environment and Population Health across the Life Course Anhui Medical UniversityHefei 230032 AnhuiChina Ma’anshan Maternal and Child Healthcare(MCH)Center Ma’anshan 243011China The Center for Scientific Research of Anhui Medical University Anhui Medical UniversityHefei 230032 AnhuiChina

ABSTRACT:Antibiotic exposure during pregnancy may affect the neurodevelopment of children,but biomonitoring-based population studies on this class of new pollutants are *** conducted a prospective birth cohort study of 2860 mother−child pairs,measured the urinary concentrations of 41 antibiotics and their two metabolites over three trimesters,and assessed children’s autism spectrum disorder(ASD)symptoms at 3 years of *** examined the associations between prenatal antibiotic exposure and children’s ASD *** least absolute shrinkage and selection operator regression screened for Tetracycline and Ofloxacin as important predictors of ASD *** Poisson regression models revealed that maternal Tetracycline exposure throughout pregnancy increased the risk of ASD symptoms(RR:1.66,95%CI:1.14,2.40).Maternal Tetracycline exposure during the first(RR:1.74,95%CI:1.13,2.68)and third trimesters(RR:1.86,95%CI:1.16,3.00)increased the risk of ASD symptoms in boys,and Ofloxacin exposure during the first trimester(RR:1.47,95%CI:1.07,2.02)increased the risk of ASD symptoms in *** dose-dependent relationships between prenatal antibiotic exposure and ASD symptoms were validated by restricted cubic *** exposure to Tetracycline and Ofloxacin may increase the risk of ASD symptoms in children,and the first and third trimesters might be the key windows.

关键词： Antibiotics Biomonitoring Urine biomarkers Prenatal exposure Autism Birth cohort

界面聚合法制备用于脱氮提纯CH_(4)的N_(2)优先渗透ZIF-90/聚酰胺混合基质膜

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化工学报 2022年第7期73卷 3273-3286,F0002页

作者：于喆淼王志生梦龙邢广宇王纪孝天津大学化工学院化学工程研究所天津市膜科学与海水淡化技术重点实验室化学工程联合国家重点实验室天津化学化工协同创新中心天津300350

作为一种高效的分离方法,膜法分离非常规天然气具有较理想的应用前景。相较CH_(4)优先渗透膜,N_(2)优先渗透膜优势在于分离N_(2)/CH_(4)混合气后CH_(4)处于高压侧,利于后续处理。以均苯三甲酰氯为油相单体,间苯二胺为水相单体,采用界面... 详细信息

作为一种高效的分离方法,膜法分离非常规天然气具有较理想的应用前景。相较CH_(4)优先渗透膜,N_(2)优先渗透膜优势在于分离N_(2)/CH_(4)混合气后CH_(4)处于高压侧,利于后续处理。以均苯三甲酰氯为油相单体,间苯二胺为水相单体,采用界面聚合法在聚砜基膜上制备致密超薄聚酰胺分离层,并通过向其中引入孔径可允许N_(2)分子通过而不允许CH_(4)分子通过的纳米颗粒ZIF-90,在膜内形成固定的N_(2)传递通道,成功制备了用于脱氮提纯CH_(4)的N_(2)优先渗透混合基质膜。膜渗透选择性能测试结果显示当混合基质膜中纳米颗粒掺杂量为0.30 g·L^(-1)时,2 bar(1 bar=0.1 MPa)进料压力下,N_(2)渗透速率达1.16×10^(-9) mol·m^(-2)·s^(-1)·Pa^(-1),N_(2)/CH_(4)分离因子达16.6,分离因子比未掺杂ZIF-90的聚酰胺膜提高46.5%,具有一定的处理非常规天然气脱氮提纯甲烷的应用潜力。

关键词：气体分离 N_(2)/CH_(4)分离界面聚合膜混合基质膜

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