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Solvent-resistant porous membranes using poly(ether−ether ketone): preparation and application

Frontiers of Chemical Science and Engineering 2022年第11期16卷 1536-1559页

作者： Lixin Xing Jiaming Wang xuehua ruan Gaohong He State Key Laboratory of Fine Chemicals R&D Center of Membrane Science and TechnologySchool of Chemical EngineeringDalian University of TechnologyDalian 116023China School of Chemical Engineering at Panjin Campus Dalian University of TechnologyPanjin 124221China

Poly(ether−ether ketone)(PEEK)is a linear aromatic macromolecule,which can form semi-crystalline aggregative status,allowing PEEK materials to have strong environment tolerance and excellent physicochemical properties.PEEK materials have become a promising alternative to fabricate particular membranes used in extreme conditions.In the past few decades,many researches and evolutions have emerged in membrane fabrication with PEEK materials and its applications for treating organic solvents and their mixtures;however,there are little systematic and comprehensive literature to summarize fabrication approaches,compile applications,and elaborate PEEK property-structure relationship.In this review,the main approaches to fabricate PEEK-based membranes are illustrated concretely,including conventional thermal-induced and non-solvent-induced phase separation,and novel chemical-induced crystallization;the representative applications in ultrafiltration,nanofiltration and membrane contactor containing organic solvents are demonstrated systematically.Meanwhile,the mechanism to tune PEEK solubility in solvents,which can be achieved by altering monomers in synthesis processes or changing membrane preparation routes,is deeply analyzed.Moreover,the existing problems and the future prospects are also discussed.This review provides positive guidance for designing and fabricating membranes using PEEK and its derivative materials for task-specific applications in harsh conditions.

关键词： PEEK phase inversion solvent-resistant membrane nanofiltration membrane contactor

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Pressure swing adsorption/membrane hybrid processes for hydrogen purification with a high recovery

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Frontiers of Chemical Science and Engineering 2016年第2期10卷 255-264页

作者： Baojun Li Gaohong He Xiaobin Jiang Yan Dai xuehua ruan State Key Laboratory of Fine Chemicals R&D Center of Membrane Science and Technology School of Chemical Engineering Dalian University of Technology Dalian 116012 China

Hydrogen was recovered and purified from coal gasification-produced syngas using two kinds of hybrid processes： a pressure swing adsorption （PSA）- membrane system （a PSA unit followed by a membrane separation unit） and a membrane-PSA system （a mem- brane separation unit followed by a PSA unit）. The PSA operational parameters were adjusted to control the product purity and the membrane operational parameters were adjusted to control the hydrogen recovery so that both a pure hydrogen product （〉 99.9%） and a high recovery （〉 90%） were obtained simultaneously. The hybrid hydrogen purification processes were simulated using HYSYS and the processes were evaluated in terms of hydrogen product purity and hydrogen recovery. For comparison, a PSA process and a membrane separation process were also used individually for hydrogen purifica- tion. Neither process alone produced high purity hydrogen with a high recovery. The PSA-membrane hybrid process produced hydrogen that was 99.98% pure with a recovery of 91.71%, whereas the membrane-PSA hybrid process produced hydrogen that was 99.99% pure with a recovery of 91.71%. The PSA-membrane hybrid process achieved higher total H2 recoveries than the membrane-PSA hybrid process under the same H2 recovery of membrane separation unit. Meanwhile, the membrane-PSA hybrid process achieved a higher total H2 recovery （97.06%） than PSA-membrane hybrid process （94.35%） at the same H2 concentration of PSA feed gas （62.57%）.

关键词： hydrogen purification PSA membrane separation hybrid process

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The control and optimization of macro/micro-structure of ion conductive membranes for energy conversion and storage

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Chinese Journal of Chemical Engineering 2016年第5期24卷 558-571页

作者： Xiaoming Yan Wenji Zheng xuehua ruan Yu Pan Xuemei Wu Gaohong He State Key Laboratory of Fine Chemicals School of Petroleum and Chemical EngineeringDalian University of Technology Research and Development Center of Membrane Science and Technology School of Chemical EngineeringDalian University of Technology

Ion conductive membranes(ICMs)are frequently used as separators for energy conversion and storage technologies of fuel cells,flow battery,and hydrogen pump,because of their good ion-selective conduction and low electronic conductivity.Firstly,this feature article reviews the recent studies on the development of new nonfluorinated ICMs with low cost and their macro/micro-structure control.In general,these new nonfluorinated ICMs have lower conductivity than commercial perfluorinated ones,due to their poor ion transport channels.Increasing ion exchange capacity(IEC)would create more continuous hydrophilic channels,thus enhancing the conductivity.However,high IEC also expands the overall hydrophilic domains,weakens the interaction between polymer chains,enhances the mobility of polymer chains,and eventually induces larger swelling.The micro-scale expansion and macro-scale swelling of the ICMs with high IEC could be controlled by limiting the mobility of polymer chains.Based on this strategy,some ef ficient techniques have been developed,including covalent crosslinking,semi-interpenatrating polymer network,and blending.Secondly,this review introduces the optimization of macro/microstructure of both perfluorinated and nonfluorinated ICMs to improve the performance.Macro-scale multilayer composite is an ef ficient way to enhance the mechanical strength and the dimensional stability of the ICMs,and could also decrease the content of per fluorosulfonic acid resin in the membrane,thereby reducing the cost of the perfluorinated ICMs.Long side chain,multiple functionalization,small molecule inducing micro-phase separation,electrospun nano fiber,and organic–inorganic hybrid could construct more ef ficient ion transport channels,improving the ion conductivity of ICMs.

关键词：离子传导存储技术能量转换导电膜宏观控制优化微结构

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包覆型缓释氧化剂的制备及其缓释性能评价

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环境工程学报 2024年第4期18卷 1044-1055页

作者：李凡申佳张雪花唐智超阮秀秀上海大学环境与化学工程学院上海市200444

在低渗层非水相液体污染物的原位化学氧化修复过程中,土壤有机质会消耗氧化剂,导致氧化剂的有效浓度难以长期维持,从而使污染物浓度容易反弹。为了解决该问题采用硬脂酸作为壳材,通过相分离法包覆高锰酸钾制备缓释氧化材料。结果表明,... 详细信息

在低渗层非水相液体污染物的原位化学氧化修复过程中,土壤有机质会消耗氧化剂,导致氧化剂的有效浓度难以长期维持,从而使污染物浓度容易反弹。为了解决该问题采用硬脂酸作为壳材,通过相分离法包覆高锰酸钾制备缓释氧化材料。结果表明,硬脂酸包覆型高锰酸钾(PP@SA)具有良好的缓释性能,可以持续缓释120 h以上。正交实验结果显示,当芯壳比为1∶3,超声时间为15 min,搅拌速度为300 r·min^(-1),粒径为1.12~4.00 mm时缓释效果最佳。并且,随着PP@SA的粒径和硬脂酸用量的增大,MnO4-的缓释机制从Fickian扩散模式向骨架溶蚀和Fickian扩散混合释放机制转变,其中骨架溶蚀释放机制逐渐起主导作用。此外,土相缓释柱实验结果表明,PP@SA在淤泥质粘土和粉质粘土两种低渗土壤中可以保持高锰酸根离子的扩散浓度在0.25 g·L^(-1)以上的时间分别为7和9d,其缓释寿命远超过原高锰酸钾。

关键词：原位化学氧化缓释高锰酸钾低渗土壤

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A new long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide)(PPO)/polybenzimidazole(PBI)amphoteric membrane for vanadium redox flow battery

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Chinese Journal of Chemical Engineering 2020年第7期28卷 1918-1924页

作者： Bowen Jiang Lei Hu Xiaoming Yan Jiahui Sun Li Gao Yan Dai xuehua ruan Gaohong He State Key Laboratory of Fine Chemicals School of Petroleum and Chemical EngineeringDalian University of TechnologyPanjin 124221China Panjin Industrial Technology Institute Dalian University of TechnologyPanjin 124221China

A new amphoteric membrane was prepared by blending long-side-chain sulfonated poly(2,6-dimethyl-1,4-phenylene oxide)(S-L-PPO)and polybenzimidazole(PBI)for vanadium redox flow battery(VRFB)application.An acid-base pair structure formed between the imidazole of PBI and sulfonic acid of S-L-PPO resulted in lowered swelling ratio.It favors to reduce the vanadium permeation.While,the increased sulfonic acid concentration ensured that proton conductivity was still at a high level.As a result,a better balance between the vanadium ion permeation(6.1×10^-9 cm^2·s^-1)and proton conductivity(50.8 m S·cm^-1)in the S-L-PPO/PBI-10%membrane was achieved.The VRFB performance with S-L-PPO/PBI-10%membrane exhibited an EE of 82.7%,which was higher than those of pristine S-L-PPO(81.8%)and Nafion 212(78.0%)at 120 m A·cm^-2.In addition,the S-LPPO/PBI-10%membrane had a much longer self-discharge duration time(142 h)than that of Nafion 212(23 h).

关键词： Amphoteric membrane Poly(2,6-dimethyl-1,4-phenylene oxide)(PPO) Vanadium redox flow battery Polybenzimidazole(PBI) Long side chain

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血根碱对腰椎间盘突出症大鼠炎性疼痛的改善作用及机制

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中国药房 2024年第9期35卷 1087-1093页

作者：阮祯何生华龚雪花乔松王超武汉市中医医院推拿科武汉430000 武汉市第七医院中南路街第一社区卫生服务中心武汉430060 湖北省中西医结合医院康复医学中心推拿科武汉430010

目的研究血根碱(SG)对腰椎间盘突出症(LDH)大鼠炎性疼痛的改善作用及机制。方法制备LDH模型大鼠,然后分为模型组和SG低、中、高剂量组(1.00、2.50、6.25 mg/kg)以及SG高剂量+Anisomycin[丝裂原活化蛋白激酶(MAPK)激活剂]组(6.25 mg/kg S... 详细信息

目的研究血根碱(SG)对腰椎间盘突出症(LDH)大鼠炎性疼痛的改善作用及机制。方法制备LDH模型大鼠,然后分为模型组和SG低、中、高剂量组(1.00、2.50、6.25 mg/kg)以及SG高剂量+Anisomycin[丝裂原活化蛋白激酶(MAPK)激活剂]组(6.25 mg/kg SG+5 mg/kg Anisomycin),每组10只;另取10只大鼠作为对照组。各组大鼠腹腔注射相应药物,对照组和模型组大鼠腹腔注射等体积生理盐水,每天1次,连续7 d。观察大鼠一般情况及神经功能变化;测定大鼠疼痛阈值[包括机械刺激缩足反射阈值(PWMT)和热刺激缩足反射潜伏期(PWTL)];观察大鼠背根神经节(DRG)组织病理变化;检测大鼠血清中炎症因子[肿瘤坏死因子α(TNF-α)、白细胞介素1β(IL-1β)]和疼痛因子[神经肽Y(NPY)、5羟色胺(5-HT)]水平;观察脊髓小胶质细胞中离子钙接头蛋白1(Iba-1)和星形胶质细胞中胶质原纤维酸性蛋白(GFAP)的阳性表达;检测大鼠DRG组织中MAPK/胞外信号调节激酶(ERK)/核因子κB(NF-κB)信号通路相关蛋白和TNF-α、IL-1β蛋白的表达。结果与对照组相比,模型组大鼠精神食欲不振,后肢运动障碍,DRG椎间盘神经元细胞排列紊乱;神经功能评分,血清中TNF-α、IL-1β、NPY水平,Iba-1、GFAP阳性表达,DRG组织中p38 MAPK、ERK1/2、NF-κB p65蛋白磷酸化水平和TNF-α、IL-1β蛋白表达水平均显著升高(P<0.05);PWMT、PWTL和血清中5-HT水平均显著降低(P<0.05)。与模型组相比,SG各剂量组大鼠精神食欲好转,后肢运动障碍缓解,DRG椎间盘神经元结构改善,上述定量指标水平均显著逆转(P<0.05)。Anisomycin可逆转SG对LDH大鼠炎性疼痛的改善作用。结论SG可通过抑制LDH大鼠DRG组织中小胶质细胞活化,减少炎症因子释放,提高疼痛阈值,从而改善炎性疼痛;其作用机制可能与抑制MAPK/ERK/NF-κB信号通路有关。

关键词：血根碱腰椎间盘突出症炎性疼痛 MAPK/ERK/NF-κB信号通路

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Integration of molecular dynamic simulation and free volume theory for modeling membrane VOC/gas separation

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Frontiers of Chemical Science and Engineering 2018年第2期12卷 296-305页

作者： Bo Chen Yan Dai xuehua ruan Yuan Xi Gaohong He State Key Laboratory of Fine Chemicals R & D Center of Membrane Science and Technology School of Chemical Engineering Dalian University of Technology Panjin 124221 China Panjin Industrial Technology Institute Dalian University of Technology Panjin 124221 China

Gas membrane separation process is highly unpredictable due to interacting non-ideal factors, such as composition/pressure-dependent permeabilities and real gas behavior. Although molecular dynamic （MD） simulation can mimic those complex effects, it cannot precisely predict bulk properties due to scale limitations of calculation algorithm. This work proposes a method for modeling a membrane separation process for volatile organic compounds by combining the MD simulation with the free volume theory. This method can avoid the scale-up problems of the MD method and accurately simulate the performance of membranes. Small scale MD simulation and pure gas permeation data are employed to correlate pressure-irrelevant parameters for the free volume theory; by this approach, the microscopic effects can be directly linked to bulk properties （non-ideal permeability）, instead of being fitted by a statistical approach. A lab-scale hollow fiber membrane module was prepared for the model validation and evaluation. The comparison of model predictions with experimental results shows that the deviations of product purity are reduced from 10% to less than 1%, and the deviations of the permeate and residue flow rates are significantly reduced from 40% to 4%, indicating the reliability of the model. The proposed method provides an efficient tool for process engineering to simulate the membrane recovery process.

关键词： membrane vapor separation membrane process modeling process engineering free volume theory volatile organic compound

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聚酰亚胺膜材料分子结构设计强化CO_(2)渗透性研究进展

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化工学报 2024年第4期75卷 1137-1152页

作者：张子佳仇昕月孙翔罗志斌罗海中贺高红阮雪华大连理工大学化工学院盘锦分院辽宁盘锦124221 中国能源建设集团广东省电力设计研究院有限公司广东广州510663

膜技术基于渗透性差异实现天然气无相变脱碳,节能优势显著,此外膜装置的模块化制造可以灵活应对非常规天然气开采规模的大幅变化。聚酰亚胺(PI)是一种广泛研究的玻璃态聚合物膜材料,脱碳选择性较高、化学稳定性好,近年来在天然气脱碳领... 详细信息

膜技术基于渗透性差异实现天然气无相变脱碳,节能优势显著,此外膜装置的模块化制造可以灵活应对非常规天然气开采规模的大幅变化。聚酰亚胺(PI)是一种广泛研究的玻璃态聚合物膜材料,脱碳选择性较高、化学稳定性好,近年来在天然气脱碳领域已实现工业应用。尽管如此,通过分子结构设计提升聚酰亚胺膜的渗透性,从而大幅降低膜装置建设成本和占地面积,仍是未来的重要研究方向。从气体在玻璃态聚合物膜中的渗透传质机制出发,归纳总结了芳香族聚酰亚胺在链段构型与柔顺性、大位阻侧基、主链轴节结构等方面的设计进展以及膜材料自由体积分数和气体渗透系数随之发生变化的内在规律,对聚酰亚胺膜材料分子结构设计的未来发展方向进行了展望,兼顾考虑自由体积分数和自由体积空穴尺寸分布范围是同时提高渗透性和选择性的重要途径。

关键词：天然气脱碳膜分离聚酰亚胺分子结构渗透性自由体积

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复方金菊口服液指纹图谱探索性研究

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国际医药卫生导报 2024年第11期30卷 1854-1857页

作者：刘宴林阮丽英谭本仁刘学华周秋霞徐韵汕头大学医学院附属粤北人民医院药学部韶关512026 丽珠集团利民制药厂韶关512028

目的本研究旨在通过高效液相色谱法(HPLC)建立复方金菊口服液的指纹图谱,为其质量控制和评价提供科学依据。方法采用Discovery C18色谱柱(250 mm×4.6 mm,5μm),流动相为乙腈-0.1%磷酸溶液梯度洗脱,流速为1.0 ml/min,柱温为30℃,检测波... 详细信息

目的本研究旨在通过高效液相色谱法(HPLC)建立复方金菊口服液的指纹图谱,为其质量控制和评价提供科学依据。方法采用Discovery C18色谱柱(250 mm×4.6 mm,5μm),流动相为乙腈-0.1%磷酸溶液梯度洗脱,流速为1.0 ml/min,柱温为30℃,检测波长245 nm。研究时间为2022年1月至2023年12月。结果建立复方金菊口服液的指纹图谱,共标定21个共有峰,并指认其中6个共有峰。结论HPLC简单、稳定,各峰分离良好,为复方金菊口服液的质量控制和评价提供科学依据。

关键词：高效液相色谱法复方金菊口服液指纹图谱

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儿童CRKP感染的临床特征及预后不良危险因素研究

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重庆医学 2024年第2期53卷 198-203页

作者：付春云张欢刘敏雪岑贞娇阮佳玲王双杰胡雪桦广西壮族自治区妇幼保健院医学检验科南宁530003

目的分析儿童耐碳青霉烯类肺炎克雷伯菌(CRKP)感染的临床特征、耐药性及预后不良危险因素。方法收集2016年8月5日至2020年12月31日该院分离的住院患儿分离CRKP标本,对CRKP阳性患儿临床资料和CRKP耐药性进行分析,对CRKP感染患儿预后良好... 详细信息

目的分析儿童耐碳青霉烯类肺炎克雷伯菌(CRKP)感染的临床特征、耐药性及预后不良危险因素。方法收集2016年8月5日至2020年12月31日该院分离的住院患儿分离CRKP标本,对CRKP阳性患儿临床资料和CRKP耐药性进行分析,对CRKP感染患儿预后良好组和预后不良组的相关资料进行比较,并分析预后不良的危险因素。结果共收集106株非重复CRKP,主要分离自≤1岁患儿。科室分布以新生儿重症医学科和重症医学科为主。CRKP对多种抗菌药物呈高耐药,仅对阿米卡星、左氧氟沙星、庆大霉素、环丙沙星、米诺环素、氯霉素的耐药率<30%。CRKP感染患儿预后不良率达27.4%。logistic多因素回归分析结果显示,多器官功能障碍和贫血是CRKP感染患儿预后不良的独立危险因素(P<0.05)。结论儿童CRKP感染以≤1岁婴儿为主,CRKP对多种抗菌药物呈高度耐药,预后不良的独立危险因素包括多器官功能障碍和贫血。

关键词：耐碳青霉烯类肺炎克雷伯菌耐药性危险因素多器官功能障碍贫血

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