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Epoxy microcapsules for high-performance self-healing materials using a novel method via integrating electrospraying and interfacial polymerization

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Journal of Materials Science & Technology 2022年第17期112卷 59-67页

作者： He Zhang Kaibin Xiao Zhilin Lin Shengyu Shi Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of TechnologyGuangzhou 510641China National Engineering Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering(SCUT)Ministry of EducationSouth China University of TechnologyGuangzhou 510641China

The high-efficiency fabrication of high-quality microcapsules containing epoxy is crucial to the further development of the potential practical self-healing epoxy systems based on microencapsulated two-part epoxy-amine ***,a novel microencapsulation technique based on non-equilibrium droplets via integrating electrospraying and interfacial polymerization(ES-IP)was established to efficiently microencapsulate epoxy *** ES-IP technique,consisting of three continuous steps,*** to massively generate droplets,enwrapping every single droplet through instant interfacial polymerization,and thickening shell at an elevated temperature,has great flexibility to regulate the microencapsulation process and the microcapsule *** fabricated core-shell structured epoxy microcapsules(Ep-MCs)were comprehensively characterized for their properties,showing that they have high cleanness with rare impurities,controllable and tunable size,good thermal stability and tightness,and high effective core *** high-quality Ep-MCs were adopted to formulate a self-healing epoxy based on the microencapsulated epoxy-amine *** highest healing efficiency,in terms of the recovered mode I fracture toughness,of 110±17%was achieved after being healed at room temperature(~25℃)for 48 *** the developed ES-IP technique facilitates the microencapsulation technique based on non-equilibrium droplets,the fabricated high-quality Ep-MCs greatly promote the further developments of the practical self-healing materials.

关键词： Epoxy Microcapsule Electrospraying interfacial polymerization Self-healing

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CO2/CH4 separation using inside coated thin film composite hollow fiber membranes prepared by interfacial polymerization

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Chinese Journal of Chemical Engineering 2017年第3期25卷 278-287页

作者： Eun-Sung Jo Xinghai An Pravin G.Ingole Won-Kil Choi Yeong-Sung Park Hyung-Keun Lee Korea Institute of Energy Research(KIER) 71-2 Jang-dongYuseong-guDaejeon 205343Republic of Korea Department of Environmental Engineering Daejeon UniversityDaejeonRepublic of Korea Department of Advanced Energy and Technology University of Science and Technology(UST)217 Gajeong-roYuseong-guDaejeon 305-350Republic of Korea

Carbon dioxide(CO_2) is greenhouse gas which originates primarily as a main combustion product of biogas and landfill gas. To separate this gas, an inside coated thin film composite(TFC) hollow fiber membrane was developed by interfacial polymerization between 1,3–cyclohexanebis–methylamine(CHMA) and trimesoyl chloride(TMC). ATR-FTIR, SEM and AFM were used to characterize the active thin layer formed inside the PSf hollow fiber. The separation behavior of the CHMA-TMC/PSf membrane was scrutinized by studying various effects like feed gas pressure and temperature. Furthermore, the influence of CHMA concentration and TMC concentration on membrane morphology and performance were investigated. As a result, it was found that mutually the CHMA concentration and TMC concentration play key roles in determining membrane morphology and performance. Moreover, the CHMA-TMC/PSf composite membrane showed good CO_2/CH_4 separation performance. For CO_2/CH_4 mixture gas(30/70 by volume) test, the membrane(PD1 prepared by CHMA 1.0% and TMC 0.5%) showed a CO_2 permeance of 25 GPU and the best CO_2/CH_4 selectivity of 28 at stage cut of 0.1. The high CO_2/CH_4 separation performance of CHMA-TMC/PSf thin film composite membrane was mostly accredited to the thin film thickness and the properties of binary amino groups.

关键词： Thin-film composite hollow fiber membrane interfacial polymerization CHMA/TMC CO2/CH4 separation

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Highly permeable reverse osmosis membranes incorporated with hydrophilic polymers of intrinsic microporosity via interfacial polymerization

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Chinese Journal of Chemical Engineering 2022年第5期35卷 194-202页

作者： Jing Dou Shuo Han Saisai Lin Zhikan Yao Lian Hou Lin Zhang Engineering Research Center of Membrane and Water Treatment of MOE College of Chemical&Biological EngineeringZhejiang UniversityHangzhou 310027China Research Institute of Ningbo Zhejiang UniversityNingbo 315100China Xi’an High-Tech Institute Xi’an 710025China

Enhancing the water permeation while maintaining high salt rejection of existing reverse osmosis(RO)membranes remains a considerable ***,we proposed to introduce polymer of intrinsic microporosity,PIM-1,into the selective layer of reverse osmosis membranes to break the trade-off effect between permeability and selectivity.A water-soluble a-LPIM-1 of low-molecular-weight and hydroxyl terminals was *** designed characteristics endowed it with high solubility and *** it was mixed with m-phenylenediamine and together served as aqueous monomer to react with organic monomer of trimesoyl chloride via interfacial *** characterization results exhibited that more“nodule”rather than“leaf”structure formed on RO membrane surface,which indicated that the introduction of the high free-volume of a-LPIM-1 with three dimensional twisted and folded structure into the selective layer effectively caused the frustrated packing between polymer *** virtue of this effect,even with reduced surface roughness and unchanged layer thickness,the water permeability of prepared reverse osmosis membranes increased 2.1 times to 62.8 L·m^(-2)·h^(-1) with acceptable Na Cl rejection of 97.6%.This attempt developed a new strategy to break the trade-off effect faced by traditional polyamide reverse osmosis membranes.

关键词： PIM-1 Intrinsic microporosity Reverse osmosis interfacial polymerization Trade-off

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Reducing active layer thickness of polyamide composite membranes using a covalent organic framework interlayer in interfacial polymerization

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Chinese Journal of Chemical Engineering 2020年第4期28卷 1039-1045页

作者： Meidi Wang Weixiong Guo Zhongyi Jiang Fusheng Pan State Key Laboratory of Petroleum Pollution Control CNPC Research Institute of Safety and Environmental TechnologyBeijing 102206China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

Polyamide(PA)-based thin-film composite membranes exhibit enormous potential in water purification,owing to their facile fabrication,decent performance and desirable ***,the thick PA active layer with high transport resistance from the conventional interfacial polymerization hampers their *** controllable fabrication of a thin PA active layer is essential for high separation efficiency but still ***,a covalent organic framework TpPa-1 interlayer was firstly deposited on a polyethersulfone(PES)substrate to reduce the thickness of PA active layer in interfacial *** abundant pores of TpPa-1 increase the local concentration of amine monomers by adsorbing piperazine molecules,while hydrogen bonds between hydrophilic groups of TpPa-1 and piperazine molecules slow down their diffusion *** from those synergetic effects,the PA active layer is effectively reduced from 200 nm to 120 *** optimizing TpPa-1 interlayer and PA active layer,the water flux of resultant membranes can reach 171.35 L·m^-2·h^-1·MPa^-1,which increased by 125.4%compared with PA/PES membranes,while the rejection rates of sodium sulfate and dyes solution remained more than 90%and 99%,*** strategy may stimulate rational design of ultrathin PA-based nanofiltration membranes with high performances.

关键词： Thin film composite membranes interfacial polymerization Covalent organic frameworks interlayer Nanofiltration

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Preparation of Thin Film Composite Nanofiltration Membrane by interfacial polymerization with 3,5-Diaminobenzoylpiperazine and Trimesoyl Chloride

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Chinese Journal of Chemical Engineering 2011年第2期19卷 262-266页

作者：王丽红李德玲程丽华张林陈欢林 Department of Chemistry Tangshan Normal CollegeTangshan 063000China Department of Chemical & Biological Engineering Zhejiang UniversityHangzhou 310027China The Engineering Central of Membrane and Water Treatment MOEHangzhou 310027China

A new aromatic diamine,3,5-diaminobenzoylpiperazine （3,5-DABP）,was synthesized from 3,5-diaminobenzoic acid and 1-formyl *** structure of 3,5-DABP was identified by FT-IR spectra and 1H NMR *** 3,5-DABP as aqueous monomer and trimesoyl chloride （TMC） as organic monomer,thin film composite （TFC） nanofiltration membranes were prepared by interfacial polymerization *** salt rejection order of these TFC membranes is *** sequence indicates that the membranes are negatively charged.

关键词： thin film composite membrane 3 5-diaminobenzoylpiperazine trimesoyl chloride interfacial polymerization

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Polyamide Nanofiltration Membrane from Surfactant-assembly Regulated interfacial polymerization of 2-Methylpiperazine for Divalent Cations Removal

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Chemical Research in Chinese Universities 2022年第3期38卷 782-789页

作者： GONG Li ZHU Yuzhang DONG Dianyu ZHANG Yuping GUI Liangliang JIN Jian College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou215123P.R.China i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou215123P.R.China

Removal of metal ions from water can not only alleviate the scaling problem of domestic and industrial water,but also solve the water safety problem caused by heavy metal ion ***,we fabricate a positively charged nanofiltration membrane via surfactant-assembly regulated interfacial polymerization(SARIP)of 2-methylpiperazine(MPIP)and trimesoyl chloride(TMC).Due to the existence of methyl substituent,MPIP has lower reactive activity than piperazine(PIP)but stronger affinity to hexane,resulting in a nanofiltration(NF)membrane with an opposite surface charge and a loose polyamide active ***,with the help of sodium dodecyl sulfate(SDS)assembly at the water/hexane,the reactivity between MPIP and TMC was obviously increased and caused in turn the formation of a positively charged polyamide active layer with a smaller pore size,as well as with a narrower pore size *** resulting membrane shows a highly efficient removal of divalent cations from water,of which the rejections of MgCl_(2),CoCl_(2)and NiCl_(2)are higher than 98.8%,98.0%and 98.0%,respectively,which are better than those of most of other positively charged NF membranes reported in literatures.

关键词： Nanofiltration membrane interfacial polymerization Surface charge Divalent cation removal

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Preparation of Composite Charge-mosaic Hollow Fiber Membrane by interfacial polymerization

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Chinese Chemical Letters 2004年第5期15卷 609-610页

作者： HaoQinZHANG JinDunLIU CollegeofChemicalEngineering ZhengzhouUniversityZhengzhou450002

The preparation of composite charge-mosaic membrane included spinning of hollow fiber as the supporting membrane, preparing a selective layer on the inside surface of the fiber by interfacial polymerization. The charge-mosaic membranes show a high salt permeability while retaining sucrose. The charge-mosaic membrane can be effectively used to separate multivalent salts with organic matter of molecular weight great than 300 g/mol in industry.

关键词： Charge-mosaic membrane interfacial polymerization composite membrane.

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Ultrathin Nanofilms Prepared by interfacial polymerization

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Chemical Research in Chinese Universities 2023年第6期39卷 862-863页

作者： LI Linji SHI Yongli ZHANG Kai Geological Experiment and Testing Institute Henan Academy of GeologyZhengzhou 450052P.R.China

Recently,Livingston and his colleagues published two articles in Nature and Science,respectively,to tackle the challenges of accurate molecular sieving and crude oil separation in the field of membrane separation by preparing ultrathin nanofilms through interfacial *** is that the nanofilms with ordered sub-nanopores achieve accurate molecular sieving atångström precision,and the other is that the permeability of hydrophobic polyamide nanofilms to hydrophobic liquid is significantly enhanced by an order of *** thoughtful design and excellent performance provide a feasible strategy for the development of membrane separation,and show great potential in industrial applications(drug separation and crude oil fractionation).

关键词： Ultrathin nanofilm interfacial polymerization Molecu-larsieving Sub-nanopore

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Porous Poly（1-naphthylamine） Synthesized by interfacial polymerization

Porous Poly（1-naphthylamine） Synthesized by Interfacial Po...

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2014中国功能材料科技与产业高层论坛

作者： Zhen-zhong Hou Qing-hao Yang Department of Material Science and Engineering Xi’an university of science and technology

Porous poly（1-naphthylamine）were synthesized by interracial polymerization *** effects of several reaction conditions including oxidant/monomer molar ratio,polymerization temperature and reaction time on the polymerization yield have been *** highest yield of poly（1-naphthylamine）was up to 73%at oxidant/monomer molar ratio of 3 and polymerization temperature of 25(C for over *** FT-IR and XRD to analyze the structure of the obtained polymer,the results show that the main mode of connection for 1-naphthylamine units was linking N to para-C and it formed amorphous polymer with some ordered *** micro-morphology of the polymer observed by SEM was found to have irregular porous structure with pore size less than 5μm,which may be related to the"self-emulsion effect"during polymerization.

关键词： Poly(1-naphthylamine) interfacial polymerization Porous material

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Nanoscale Hollow-bubbly Polypyrrole Obtained via interfacial polymerization with Phase Transfer Catalyst

Nanoscale Hollow-bubbly Polypyrrole Obtained via Interfacial...

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2014中国功能材料科技与产业高层论坛

作者： Dengpan Dong Qinghao Yang Lintao Yang Zhenzhong Hou Zhongyi Tu College of Material Science and Engineering Xi’anUniversity of Science and Technology

Crown ether 18C6 was used as a phase transfer catalyst(PTC)for the interfacial polymerization of polypyrrole(PPy).Usually,in interfacial reacting system,oxidant FeCl was dissolved in deionized water to form aqueous phase,while pyrrole was dissolved in chloroform to form organic *** 18C6PTC can efficiently form complexes with Fe(Ⅲ)and transfer Fe(Ⅲ)from aqueous phase into organic phase,resulting in nanoscale hollow-bubbly PPy with better electronic ***-vis was used to confirm the phase transfer ability of composed Fe(Ⅲ).Cyclic Voltammograms(CVs)were used to characterize capacitance property of *** Transition Infrared(FT-IR)spectroscopy and Scanning Electronic Microscopy(SEM)were carried out to investigate the microstructure of ***,defect control migration growth mechanism of PPy during the polymerization has been carefully discussed.

关键词： Polypyrrole interfacial polymerization Phase transfer catalyst Crown ether 18C6 Hollowbubbly morphology

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