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Facile fabrication of durable superhydrophobic fabrics by silicon polyurethane membrane for oil/water separation

Chinese Journal of Chemical Engineering 2023年第3期55卷 73-83页

作者： Taoyan Mao runhui xiao Peng Liu Jiale Chen Junqiang Luo Su Luo Fengwei Xie Cheng Zheng School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Guangdong Debao Environmental Technology Research Co.Ltd Guangzhou 510300China School of Engineering Newcastle UniversityNewcastle upon Tyne NE17RUUnited Kingdom Guangzhou Vocational College of Science and Technology Guangzhou 510550China

Nowadays, oil contamination has become a major reason for water pollution, and presents a global environmental challenge. Although many efforts have been devoted to the fabrication of oil/water separation materials, their practical applications are still hindered by their weak durability, poor chemical tolerance,environmental resistance, and potential negative impact on health and the environment. To overcome these drawbacks, this work offers a facile method to fabricate the eco-friendly and durable oil/water separation membrane fabrics by alkaline hydrolysis and silicon polyurethane coating. The X-ray photoelectron spectroscopy, scanning electron microscopy, and atomic force microscopy results demonstrate that silicon polyurethane membrane could be coated onto the surface of hydrolyzed polyester fabric and form a micro-/nano-scaled hierarchical structure. Based on this, the modified fabric could have a stable superhydrophobic property with a water contact angle higher than 150°, even after repeated washing and mechanical abrasion 800 times, as well as chemical corrosion. Moreover, the modified fabrics show excellent oil/water separation efficiency of up to 99% for various types of oil–water mixture. Therefore, this durable, eco-friendly and cost-efficient superhydrophobic fabric has great potential in large-scale oil/water separation.

关键词： Superhydrophobic fabrics Silicon polyurethane membrane Durability Separation Polymers Waster water

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微波在化工过程中的研究及应用进展

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化工学报 2019年第A1期70卷 1-14页

作者：曾昭文郑成毛桃嫣魏渊肖润辉彭思玉广州大学精细化工研究所广东广州510006 广州科技职业技术学院广东广州510550

与传统加热过程比较,微波辅助有机合成的优势在于加快反应速率、提高产率和改变化学选择性。研究者们将这种常规加热无法重现的现象称为非热效应,但关于非热效应的存在性一直争论不休,至今微波促进合成反应的作用机理尚不清楚。总结了... 详细信息

与传统加热过程比较,微波辅助有机合成的优势在于加快反应速率、提高产率和改变化学选择性。研究者们将这种常规加热无法重现的现象称为非热效应,但关于非热效应的存在性一直争论不休,至今微波促进合成反应的作用机理尚不清楚。总结了微波技术在有机合成和化工分离过程的应用进展,综述了近年来国内外对微波热效应与非热效应的研究进展,阐述了微波效应的实例分析以及理论观点,同时,对微波在工业化过程的发展进行了分析与展望。

关键词：微波化工应用微波热效应非热效应化学反应分离合成

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纳米结构脂质载体的制备及其聚集动力学研究

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化工学报 2018年第10期69卷 4427-4437页

作者：魏渊凌慧郑成毛桃嫣曾昭文彭思玉肖润辉广州大学精细化工研究所广东广州510006 广州科技职业技术学院广东广州510550

采用高压均质法制备包覆二苯酮-3 (BP-3)和对甲氧基肉桂酸辛酯(OMC)两种紫外线吸收剂的纳米结构脂质载体(NLC),并通过单因素实验探究了总油相含量、液体脂质用量、防晒剂含量、乳化剂种类及其用量对NLC粒径、ζ电位和包封率的影响,并优... 详细信息

采用高压均质法制备包覆二苯酮-3 (BP-3)和对甲氧基肉桂酸辛酯(OMC)两种紫外线吸收剂的纳米结构脂质载体(NLC),并通过单因素实验探究了总油相含量、液体脂质用量、防晒剂含量、乳化剂种类及其用量对NLC粒径、ζ电位和包封率的影响,并优化了工艺配方。此外,还考察了电解质的种类、浓度以及乳化剂用量对NLC聚集行为的影响并建立了聚集动力学模型。结果表明,电解质的存在可以压缩胶体体系的双电层,导致ζ电位降低,加剧纳米粒之间的聚集结合。NLC样品在电解质NaCl和CaCl_2存在下的临界聚沉浓度分别为538.2和95.8mmol·L^(-1),且在CaCl_2溶液中的聚集速度比NaCl溶液中更快,适量的乳化剂对维持NLC体系的稳定性具有重要作用。

关键词：纳米结构脂质载体聚集作用动力学制备防晒剂模型

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微波化学反应的无量纲准数动力学模型研究:以偶氮二异丁脒盐酸盐(AIBA)分解反应为例

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化工学报 2021年第3期72卷 1364-1371页

作者：毛桃嫣邹敏婷郑成曾昭文伍旭贤肖润辉彭思玉广州大学精细化工研究所广东广州510006 岭南师范学院广东湛江524037

微波辅助化学已成为备受关注的研究课题,但微波反应动力学模型缺乏系统的研究严重阻碍了微波在化学工业化上的应用,微波化学反应在化学工程化的放大设计及应用缺乏基础依据。以偶氮二异丁脒盐酸盐(AIBA)分解反应为例,通过选择合适的溶... 详细信息

微波辅助化学已成为备受关注的研究课题,但微波反应动力学模型缺乏系统的研究严重阻碍了微波在化学工业化上的应用,微波化学反应在化学工程化的放大设计及应用缺乏基础依据。以偶氮二异丁脒盐酸盐(AIBA)分解反应为例,通过选择合适的溶剂调整其复配比例,得到一系列具有不同沸点的混合溶剂作为反应介质,使反应在混合溶剂沸点下进行,以保证反应过程中微波的持续作用来研究微波反应动力学。从微波作用下动量传递、热量传递和质量传递的影响因素进行考虑,选择了对微波化学反应必须和充分的因素,包括微波功率密度p、黏度μ、密度ρ、反应物的浓度CA、温度T、热导率λ、损耗角正切δ和微波辐射频率f。采用量纲分析方法,通过模型分析建立了微波分解反应动力学模型。通过大量的实验数据进行拟合,回归出特定反应的模型参数。该模型估算值与实验值的误差较小,相关性较高,具有一定的预测能力可解决微波反应过程放大的基础性问题,有望用于指导微波工业化生产。

关键词：微波辐射动力学模型分解反应量纲分析法

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柱前衍生-高效液相色谱-荧光检测法测定白酒中的甜蜜素

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色谱 2024年第8期42卷 792-798页

作者：顾长瑜李晓斌柴晓王真侯晨宇柯润辉中轻检验认证有限公司北京100016 中国食品发酵工业研究院有限公司北京100015

白酒中甜蜜素(化学名为环己基氨基磺酸钠)是我国食品安全监督抽检计划中的重点关注项目,生产企业亟需简单、经济、灵敏度高而且可靠的检测方法。本研究建立了柱前衍生-高效液相色谱-荧光检测法测定白酒中甜蜜素的方法。在酸性条件下,通... 详细信息

白酒中甜蜜素(化学名为环己基氨基磺酸钠)是我国食品安全监督抽检计划中的重点关注项目,生产企业亟需简单、经济、灵敏度高而且可靠的检测方法。本研究建立了柱前衍生-高效液相色谱-荧光检测法测定白酒中甜蜜素的方法。在酸性条件下,通过脱磺酸基反应将样品中的环己基氨基磺酸钠转化为氨基化合物,然后加入400 g/L的氢氧化钠溶液中和样品处理液,再加入邻苯二甲醛衍生试剂与样品溶液中的氨基化合物进行反应,产生具有荧光信号的吲哚取代衍生物。以反相C18色谱柱(250 mm×4.6 mm,5μm)为分析柱,乙腈和磷酸盐缓冲液为流动相进行等度洗脱,荧光检测器检测,外标法定量。结果表明,甜蜜素在0.1~2.0 mg/L范围内呈良好的线性关系,其相关系数(r^(2))大于0.999。基于白酒样品,在0.1~1.0 mg/kg含量范围内进行3个浓度水平的加标回收试验(n=6),平均回收率为90.7%~100.9%,相对标准偏差为3.5%~5.6%,方法的检出限为0.03 mg/kg,定量限为0.10 mg/kg。应用本方法对市售9种白酒样品进行检测,结果与GB 5009.97-2016(第三法)液相色谱-串联质谱法所得结果一致。本方法具有成本低、灵敏度高、专属性强、定量结果准确的特点,适用于大批量白酒中甜蜜素的定量检测,可为生产企业或相关机构进行白酒中甜蜜素的日常监测提供有力的技术支持。

关键词：高效液相色谱荧光检测柱前衍生甜蜜素白酒

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模拟宿主防御肽的聚(2-噁唑啉)作为佐剂增强多粘菌素B的抗菌活性并拓展抗菌谱

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Science China Materials 2024年第3期67卷 991-999页

作者：罗政杰赵学斌周敏邹景橙肖希勉刘龙强谢佳洋武月铭张雯静刘润辉 State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237China Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism Key Laboratory for Ultrafine Materials of Ministry of EducationFrontiers Science Center for Materiobiology and Dynamic ChemistryResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Department of Orthopedic Surgery Shanghai General HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200080China

临床上常用的广谱抗生素无法有效解决抗生素高度耐药ESKAPE菌感染的难题,ESKAPE耐药菌已经成为人类生命健康的重大威胁.抗生素与佐剂的联合治疗是解决抗生素耐药菌感染的重要途径,但是探索对所有ESKAPE耐药菌都具有广谱和高效抗菌活性... 详细信息

临床上常用的广谱抗生素无法有效解决抗生素高度耐药ESKAPE菌感染的难题,ESKAPE耐药菌已经成为人类生命健康的重大威胁.抗生素与佐剂的联合治疗是解决抗生素耐药菌感染的重要途径,但是探索对所有ESKAPE耐药菌都具有广谱和高效抗菌活性的抗生素-佐剂组合仍然面临巨大挑战.在这里,我们提出了一种抗生素-佐剂的有效设计策略,将对ESKAPE中耐药阴性菌具有高活性的多粘菌素B(PMB)与模拟宿主防御肽的细菌膜靶向阳离子聚(2-噁唑啉)相结合.我们通过2-噁唑啉单体可控聚合,合成了一系列具有不同疏水性侧链的阳离子聚(2-噁唑啉).研究表明,聚(2-噁唑啉)和PMB的组合效果随着聚(2-噁唑啉)侧链疏水性的提高呈现出从拮抗效应到协同效应的逐渐变化.其中,优选的聚(2-噁唑啉)EACA-POX_(20)显著增强了PMB的抗菌活性,尤其是对于ESKAPE耐药阳性菌的抗菌活性增强了16–32倍.聚(2-噁唑啉)EACA-POX_(20)有效增强了PMB的抗菌活性并扩展了PMB的抗菌谱.聚(2-噁唑啉)和PMB的组合策略能够有效对抗所有耐药ESKAPE病原体,为解决ESKAPE耐药菌提供了新的思路.

关键词： poly(2-oxazoline)s ESKAPE bacteria polymyxin B broad-spectrum activity

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Alkali-metal hexamethyldisilazide initiated polymerization on alpha-amino acid N-substituted N-carboxyanhydrides for facile polypeptoid synthesis

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Chinese Chemical Letters 2021年第5期32卷 1675-1678页

作者： Yueming Wu Min Zhou Kang Chen Sheng Chen Ximian xiao Zhemin Ji Jingcheng Zou runhui Liu State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237China Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Polypeptoids have been explored as mimics of polypeptides,owing to polypeptoids'superior stability upon *** can be synthesized from one-pot ring-opening polymerization of amino acid N-substituted N-carboxyanhydrides(NNCAs).However,the speed of polymerization of NNCAs can be very slow,especially for NNCAs bearing a bulky N-substitution *** hindered the exploration on polypeptoids with more diverse structures and ***,it is in great need to develop advanced strategies that can accelerate the polymerization on inactive ***,we report that lithium/sodium/potassium hexamethyldisilazide(Li/Na/KHMDS)initiates a substantially faster polymerization on NNCAs than do commonly used amine initiators,especially for NNCAs with bulky N-substitution *** fast NNCA polymerization will increase the structure diversity and application of polypeptoids as synthetic mimics of polypeptides.

关键词： Polypeptoids Peptide mimics N-Substituted N-carboxyanhydrides(NNCA) Lithium hexamethyldisilazide Sodium hexamethyldisilazide Potassium hexamethyldisilazide Ring-opening polymerization Inactive NNCA

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Breaking or following the membrane-targeting mechanism:Exploring the antibacterial mechanism of host defense peptide mimicking poly(2-oxazoline)s

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Journal of Materials Science & Technology 2020年第24期59卷 220-226页

作者： Chengzhi Dai Min Zhou Weinan Jiang Ximian xiao Jingcheng Zou Yuxin Qian Zihao Cong Zhemin Ji Longqiang Liu Jiayang Xie Zhongqian Qiao runhui Liu State Key Laboratory of Bioreactor Engineering Frontiers Science Center for Materiobiology and Dynamic ChemistryKey Laboratory of Specially Functional Polymeric Materials and Related Technology(ECUST)Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai200237China State Key Laboratory of Molecular Engineering of Polymers(Fudan University) Shanghai200438China

Peptides exert important biological functions but their application is hindered by their susceptibility to proteolysis and poor stability in ***,functional peptide mimics have drawn a great deal of attention to address this ***(2-oxazoline)s,a class of biocompatible and proteolysis-resistant polymer,can work as host defense peptide mimics without following the general membrane-targeting mechanism as shown in our previous *** observation encouraged us to figure out if poly(2-oxazoline)s are special and break the general membrane-targeting mechanism of host defense peptides and their *** this study,we aimed at the connection between structure and antibacterial mechanism of poly(2-oxazoline)s.A new γ-aminobutyric acid(GABA)-pendent poly(2-oxazoline)was synthesized and investigated to compare with glycine-pendent poly(2-oxazoline)in our previous study,with the former polymer has two extra CH2 groups in the sidechain to increase the hydrophobicity and *** depolarization assay suggested that incorporating two more CH2 groups into the sidechain of poly(2-oxazoline)resulted in a mechanism switch from DNA-targeting to membrane-targeting,which was supported by the slow time-kill kinetics and slightly distorted and sunken membrane ***,GABA-pendent poly(2-oxazoline)showed potent activity against methicillin-resistant *** and low hemolysis on human red blood ***,repeated use of the antimicrobial poly(2-oxazoline)did not stimulate bacteria to obtain resistance,which was an obvious advantage of membrane-targeting antimicrobial agents.

关键词： Poly(2-oxazoline) Host defense peptide Antibacterial mechanism Membrane-targeting Antimicrobial resistance

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Controllable Polymerization of N-Substituted β-Alanine N-Thiocarboxyanhydrides for Convenient Synthesis of Functional Poly(β-peptoid)s

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CCS Chemistry 2023年第4期5卷 994-1004页

作者： Ximian xiao Min Zhou Zihao Cong Longqiang Liu Jingcheng Zou Zhemin Ji Ruxin Cui Yueming Wu Haodong Zhang Sheng Chen Maoquan Li runhui Liu State Key Laboratory of Bioreactor Engineering East China University of Science and TechnologyShanghai 200237 Key Laboratory for Ultrafine Materials of Ministry of Education Frontiers Science Center for Materiobiology and Dynamic ChemistryShanghai Frontiers Science Center of Optogenetic Techniques for Cell MetabolismResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237 Department of Interventional and Vascular Surgery Shanghai Tenth People’s HospitalTongji University School of MedicineShanghai 200072

Poly(β-peptoid)is a class of polypeptide mimics that possesses excellent biocompatibility and resistance to ***,the synthesis of poly(β-peptoid)s with functionalities is a long-standing challenge that greatly hinders the functional study and application of poly(β-peptoid)*** report a controllable and easy synthesis of poly(β-peptoid)s bearing diverse functionalities via the ring-opening polymerization on N-substitutedβ-alanine N-thiocarboxyanhydrides(β-NNTAs).The polymerization can be carried out in openvesselsundermildconditions usingaminesas the initiators to provide poly(β-peptoid)s with targeted molecular weights,narrow dispersities,and diverse functionalities in the side chains and ***β-NNTAs polymerization is even compatible with initiators bearing unprotected hydroxyl *** amphiphilic/cationic poly(β-peptoid)s exhibit a broad spectrum and potent antibacterial activities against multidrug-resistant *** addition,the highly favored stability ofβ-NNTAmonomers for purification and storage highlights the advantages of thisβ-NNTA polymerization strategy for poly(β-peptoid)s synthesis,functional study,and application as a synthetic mimic of polypeptides.

关键词： ring-opening polymerization poly(β-peptoid) β-NNTA functionlization

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Host-Defense-Peptide-Mimickingβ-Peptide Polymer Acting as a Dual-Modal Antibacterial Agent by Interfering Quorum Sensing and Killing Individual Bacteria Simultaneously

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Research 2023年第4期2023卷 245-261页

作者： Wanlin Li Ximian xiao Yuchen Qi Xiuhui Lin Huiqun Hu Minqi Shi Min Zhou Weinan Jiang Longqiang Liu Kang Chen Kai Wang runhui Liu Min Zhou Department of Respiratory and Critical Care Medicine the Fourth Affiliated HospitalZhejiang University School of MedicineYiwu 223300China University-University of Edinburgh Institute(ZJU-UoE Institute) Zhejiang University School of MedicineZhejiang UniversityHaining 314400China State Key Laboratory of Bioreactor Engineering Key Laboratory for Ultrafine Materials of Ministry of EducationFrontiers Science Center for Materiobiology and Dynamic ChemistryResearch Center for Biomedical Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China Institute of Translational Medicine Zhejiang UniversityHangzhou 310029China Department of Infectious Diseases The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310058China State Key Laboratory of Modern Optical Instrumentations Zhejiang UniversityHangzhou 310058China

Host defense peptides(HDPs)are one of the potentially promising agents for infection diseases due to their broad spectrum and low resistance rate,but their clinical applications are limited by proteolytic instability,high-cost,and complicated synthesis ***,we report a host-defense-peptidemimickingβ-peptide polymer that resists proteolysis to have enhanced the activity under physiological conditions,excellent antimicrobial efficiency even at high density of bacteria,and low cost for ***β-peptide polymer demonstrated quorum sensing(QS)interference and bactericidal effect against both bacterial communities and individual bacterium to simultaneously block bacterial communication and disrupt bacterial *** hierarchical QS network was suppressed,and main QS signaling systems showed considerably down-regulated gene expression,resulting in excellent biofilm eradication and virulence reduction *** dual-modal antibacterial ability possessed excellent therapeutic effects in Pseudomonas aeruginosa pneumonia,which could inhibit biofilm formation and exhibit better antibacterial and anti-inflammatory efficiency than clinically used antibiotics,***,theβ-peptide polymer also showed excellent therapeutic effect Escherichia coli pyogenic liver ***,we believed that theβ-peptide polymer had a feasible clinical potential to treat bacterial infection diseases.

关键词： process Killing modal

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