检索结果-南通市图书馆

Chinese Journal of Reactive polymers 2004年第1期13卷 65-73页

作者： WANGShufang SONGCunjiang CHENGuangxin LIUJing YANGChao ZHANGXihui GUOTianying ZHANGBanghua state key laboratory of functional polymer materials for adsorption and separation hTstitute of Polymer ChemtryN＆Tjoint AcademyNankai UniversityTianjin 300071China Department of Microbiology Life Science CollegeNankai UniversityTianjin 300071China

Poly (3-hydroxybutyrate-co-3-hydroxyvalerate)/Organophilic montmorillonite (PHBV/OMMT) nanocomposites were prepared and the biodegradability of the PHBV/OMMT nanocomposites was studied by a cultivation degrading method in soil suspension. The relationship between structure and biodegradability of PHBV/OMMT nanocomposites was investigated. The results showed that the biodegradability of PHBV/OMMT nanocomposites decreased with increasing amount of OMMT and it was related to the number of PHBV degrading microorganisms in degradation environment, the anti-microbial property of OMMT and the degree of crystallinity of the nanocomposites.

关键词： Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) Organophilic montmorillonite Biodegradability.

REINFORCEMENT OF CALCIUM PHOSPHATE CEMENTS WITH PHOSPHORYLATED CHITIN

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of polymer Science 2002年第4期20卷 325-332页

作者： Xiao-hong Wang Jian-biao Ma Yi-nong Wang Bin-ling He The state key laboratory of functional polymer materials for adsorption and separation Institute of polymer Chemistry Nankai University Tianjin 300071, China Nankai Univ Inst Polymer Chem State Key Lab Funct Polymer Mat Adsorpt & Separat Tianjin 300071 Peoples R China

Phosphorylated chitins (P-chitins) as the additives of calcium phosphate cements (CPCs) were prepared by the phosphorylation of chitin with phosphorus pentoxide in methanesulfonic acid. Their physical properties and effects on CPCs from monocalcium phosphate monohydrate (MCPM) and calcium oxide (CaO) or dicalcium phosphate dihydrate (DCPD) and calcium hydroxide [Ca(OH)(2)] were investigated. Addition of P-chitin (M-w = 2.60 x 10(4); degree of substitution, DS = 0.68) to the liquid phase in amounts up to 3 wt.% for MCPM and CaO cements or 1.5 wt.% for DCPD and Ca(OH)(2) cements could enhance the mechanical strength considerably, while little influence on the setting time was observed. However, further addition of P-chitin will cause no setting.

关键词： phosphorylated chitins calcium phosphate cements mechanical strength setting time

THE PREPARATION OF CROSSLINKED N,O-CARBOXYMETHYL CHITOSAN RESINSAND THEIR adsorption PROPERTIESFOR TRIGLYCERIDE IN SERUM

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Reactive polymers 1997年第1期6卷 83-86页

作者： Yu Yihau He Binglin Gu Hanqing Institute of polymer Chemistry The State Key Laboratory of Functional Polymer Materials for Adsorption and Separation Nankai University Tianjin 300071 P. R. China Tianjin Institute of Urological Surgery Tianjin Institute of Urological Surgery

Crosslinked N, O-carboxymethyl chitosan resins which can selectively adsorb triglyceride, were prepared by the reaction of N, O- carboxymethyl chitosan with glutaraldehyde solution. adsorption experiments were performed by adding the resins to the serum. The results showed that this type of adsorbent could cut down the concentration of triglyceride in serum by 56. 4% (3. 35mg/gresin ) at most, while concentration of the total protein (TP ) decreased only by 10. 9% at least, so this novel adsorbent can be used to cure hypertriglyceridemia by hemoperfusion in the future.

关键词： Crosslinked N O-carboxymethyl chitosan Triglyceride Serum, Total protein (TP ) Hypertriglyceridemia adsorption

Ordered mesoporous carbon-silica frameworks confined magnetic mesoporous TiO_(2) as an efficient catalyst under acoustic cavitation energy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materiomics 2020年第1期6卷 45-53页

作者： Pengpeng Qiu Tao Zhao Jeehyeong Khim Wan Jiang Lianjun Wang Wei Luo state key laboratory for Modification of Chemical Fibers and polymer materials College of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai201620China School of Civil Environmental and Architectural EngineeringKorea UniversitySeoul136-701Republic of Korea

Herein,we report a biphase stratification strategy that enables the encapsulation of magnetic mesoporous TiO_(2) inside an ordered mesoporous C/SiO_(2) *** obtained composites exhibit high surface areas(up to 600 m^(2) g^(-1)),large perpendicular pore sizes(up to 9 nm)and a strong magnetic response(~10.0 emu g^(-1)),presenting significantly enhanced degradation activities toward pentachlorophenol(PCP)and bisphenol-A(BPA)under acoustic cavitation *** remarkable performance is ascribed to the synergistic effect from the unique structural modulation:1)The large ordered mesopores favors the mass transfer,2)The mesoporous C/SiO_(2) frameworks promote the adsorption of organic pollutants and enrich them close to the TiO_(2) surface and 3)The special spatial arrangement of different components facilitates the generation of cavitation bubbles,leading to the increase in the overall hydroxyl-radical-production ***,owing to the effective confinement,the as-prepared materials possess an excellent stability and *** importantly,the catalysts can easily be recovered by a magnet and show an excellent *** is believed that these results could provide an important insight for the development of an efficient,stable and facile recoverable catalyst for the acoustic chemical process.

关键词： Fe_(3)O_(4)@mTiO_(2)@mC/SiO_(2) Acoustic cavitation Magnetic separation Mechanical stability

functional graphene oxide nanosheets modified with cyclodextrins for removal of Bisphenol A from water

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2021年第11期34卷 79-87页

作者： Zhi-Hao Chen Zhuang Liu Lei Zhang Quan-Wei Cai Jia-Qi Hu Wei Wang Xiao-Jie Ju Rui Xie Liang-Yin Chu School of Chemical Engineering Sichuan UniversityChengdu 610065China state key laboratory of polymer materials Engineering Sichuan UniversityChengdu 610065China

A novel type of functional graphene oxide nanosheets(GNs)modified with b-cyclodextrins(b-CDs)have been developed by coating dopamine-functionalized cyclodextrin(DACD)molecules on GNs for removing Bisphenol A(BPA)molecules from *** DACD molecules with both b-CD groups for achieving adsorption property and dopamine(DA)groups for achieving adhesion property are synthesized by grafting DA onto carboxymethyl-b-cyclodextrin(CmbCD).The proposed DACD molecules can be firmly coated on the surfaces of various inorganic and organic *** to the large specific surface area of GNs,DACD-coated GNs(DACD@GNs)are proposed for efficient adsorption separation of BPA molecules from *** to the host-gust complexation between the BPA molecules in water and b-CDs on DACD@GNs,the fabricated DACD@GNs exhibit excellent adsorption *** adsorption kinetics can be explained via the pseudo-second-order model *** experimental adsorption capacity of DACD@GNs is 11.29 mg·g^(-1) for ***,after the adsorption process,the DACD@GNs can be easily separated from aqueous solutions via vacuum filtration with porous membranes,and then regenerated by simply washing with *** proposed strategy in this study can be used for effectively functionalizing the surfaces of various substrates with functional b-CDs,which is highly promising in applications in the field of adsorption separations,especially water treatments.

关键词： adsorption separation b-Cyclodextrin Bisphenol A Graphene oxide nanosheets Dopamine

Synthesis of stimuli-responsive pillararene-based supramolecular polymer materials for the detection and separation of metal ions

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2023年第5期34卷 268-273页

作者： Yongfu Li Xinyue Lou Chunyu Wang Yan Wang Yu Jia Qi Lin Yingwei Yang International Joint Research laboratory of Nano-Micro Architecture Chemistry College of ChemistryJilin UniversityChangchun 130012China state key laboratory of Supramolecular Structure and materials Institute of Theoretical ChemistryLaboratory of Theoretical and Computational ChemistryCollege of ChemistryJilin UniversityChangchun 130012China key laboratory of Eco-functional polymer materials of the Ministry of Education Key Laboratory of Eco-Environmental Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China

A stimuli-responsive supramolecular polymer network(G-(CN)_(2)⊂BXDSP5)with aggregation-induced emission(AIE)properties has been efficiently constructed by host-guest interactions between pillar[5]arene derivative BXDSP5 and a homoditopic guest G-(CN)_(2),which shows not only excellent fluorescence properties due to the AIE effect but also desirable ion-sensing abilities in both solution and solid states,holding great potential in the applicable fluorescence detection for Fe^(3+).The resultant G-(CN)_(2)⊂BXDSP5 can be transformed into supramolecular polymer gel at high concentration via multiple noncovalent interactions,showing multi-stimuli-responsiveness in response to temperature change,mechanical force,and competitive ***,the xerogel of supramolecular polymer material has been successfully used to remove Fe^(3+)from water with high adsorption *** addition,an ionresponsive film based on supramolecular polymer has also been developed,which can serve as a practical and convenient fluorescence test kit for detecting Fe^(3+).

关键词： Aggregation-induced emission Host-guest chemistry Sensing and separation Stimuli-responsive materials Supramolecular polymer materials

Schiff-base polymer derived FeCo-N-doped porous carbon flowers as bifunctional oxygen electrocatalyst for long-life rechargeable zinc-air batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 470-478,I0012页

作者： Yusong Deng Jiahui Zheng Bei Liu Huaming Li Mei Yang Zhiyu Wang College of Chemistry Xiangtan UniversityXiangtan 411105HunanChina key lab of Environment-Friendly Chemistry and Application in Ministry of Education Key Laboratory of Polymeric Materials&Application Technology of Hunan ProvinceKey Laboratory of Advanced Functional Polymeric Materials of College of Hunan ProvinceXiangtan UniversityXiangtan 411105HunanChina state key lab of Fine Chemicals Liaoning Key Lab for Energy Materials and Chemical EngineeringPSU-DUT Joint Center for Energy ResearchSchool of Chemical Engineering Dalian University of TechnologyDalian 116024LiaoningChina

Rational design and exploration of low-cost and robust bifunctional oxygen electrocatalysts are vitally important for developing high-performance zinc-air batteries(ZABs).Herein,we reported a facile yet cost-efficient approach to construct a bifunctional oxygen reduction reaction(ORR)/oxygen evolution reaction(OER)electrocatalyst composed of N-doped porous carbon nanosheet flowers decorated with Fe Co nanoparticles(Fe Co/N-CF).Rational design of this catalyst is achieved by designing Schiff-base polymer with unique molecular structure via hydrogen bonding of cyanuramide and terephthalaldehyde polycondensate in the presence of metal *** exhibits excellent activity and stability for electrocatalysis of ORR/OER,enabling ZAB with a high peak power density of 172 m W cm^(-2)and a large specific capacity of 811 m A h g^(-1)Znat large *** rechargeable ZAB demonstrates excellent durability for 1000 h with slight voltage decay,far outperforming a couple of precious Pt/Ir-based *** functional theory(DFT)calculations reveal that high activity of bimetallic Fe Co stems from enhanced O_(2)and OH-adsorption and accelerated O_(2)dissociation by OAO bond activation.

关键词： Rechargeable zinc-air batteries Oxygen electrocatalyst Schiff-base polymer Bimetallic FeCo N-doped porous carbon

APPLICATION OF THE SULFONATE ESTER GROUP AS A LINKER FOR SOLID PHASE ORGANIC SYNTHESIS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Reactive polymers 2001年第1期10卷 21-26页

作者： SUN Weimin LUO Juntao HUANG Wenqiang ZHU Xiaoxia The state key laboratory of functional polymer Material for adsorption and separation Institute of Polymer ChemistryNankai UniversityTianjin 300071China Department of Chemistry University of MontrealMontrealQuebecCANADA H3C 3J7

A use of Sulfonate ester as a linker in synthesis of (-aminoalkanols was reported. Diols were tethered onto polystyryl sulfonyl chloride resin, yielding sulfonate resins (2). After cleaved by diethyl amine, diisopropy... 详细信息

关键词： Polystyryl sulfonate ester Immobilization of diol (-Aminoalkanol Solid phase organic synthesis.

CATALYSIS OF POLYSTYRENE N-HYDROXYL SULFONAMIDE FOR ESTERIFICATION OF BUTANOL WITH ACETIC ANHYDRIDE

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Reactive polymers 2004年第1期13卷 1-6页

作者： LIShufeng LIQian YANGXinlin HUANGWenqiang state key laboratory of functional polymer materials for adsorption and separation Institute of polymer Chemistry Nankai UniversityTianjin 300071.China

Polystyrene N-hydroxyl sulfonamide resin 1 was prepared and used to catalyze the esterification of n-butanol and acetic anhydride. The mechanism of catalytic esterification proved by IR spectra of the resins was found that O-H and N-H of the N-hydroxyl sulfonamide resin reacted with the acetic anhydride respectively to form the active intermediate polystyrene N,O-diacetyl sulfonamate which was cleaved by n-butanol to produce butyl acetate. The catalytic esterification by resin 1 was in good agreement with the kinetic model of 揵i-bi-ping-pong?mechanism.

关键词： Polystyrene N-hydroxyl sulfonamide N,O-diacetyl sulfonamate Esterification kinetics Acyl transfer.

Enhancing Dehydration Performance of Isopropanol by Introducing Intermediate Layer into Sodium Alginate Nanofibrous Composite Pervaporation Membrane

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advanced Fiber materials 2019年第2期1卷 137-151页

作者： Peiyun Li Cheng Cheng Ke Shen Tonghui Zhang Xuefen Wang Benjamin S.Hsiao state key lab for Modification of Chemical Fibers and polymer materials Donghua UniversityShanghai 201620People’s Republic of China Department of Chemistry Stony Brook UniversityStony BrookNY 11794USA

A novel three-tier composite membrane based on highly porous nanofibrous substrate was demonstrated for efficient iso-propanol dehydration by ***,polyethyleneimine(PEI)modified graphene oxide(GO)sheets were vacuum-assistant assembled onto porous electrospun polyacrylonitrile(PAN)nanofibrous substrate to achieve a smooth,hydrophilic and compact PEI-GO intermediate *** introduction of PEI chains endowed GO interlayer with sufficient interaction for bonding adjacent GO nanosheets to enhance stability in water/isopropanol mixture and also with the ascended inter-lamellar space to improve the water-sorption ability due to the abundant active amino *** from PEI-GO layer,a defect-free sodium alginate(SA)skin layer could be facilely manufactured with elaborately controlled thickness as thin as possible in order to reduce mass transfer resistant and enhance permeability ***,the interlayer would also contribute to enhance interfacial adhesion to promote the structure integrity of three-tier thin-film nanofibrous composite(TFNC)membrane in pervaporation dehydration *** fine-tuning of membrane preparation process,the SA/PEI(75)-GO-60/PAN TFNC membrane exhibited competitive pervaporation performance with the permeate flux of 2009 g/m2 h and the separation factor of 1276 operated at 70°C for dehydration of 90 wt%isopropanol *** unique three-tier composite membrane structure suggested an effective and facile approach to design novel membrane structure for further improvement of pervaporation performance.

关键词： Polyethyleneimine modified graphene oxide Intermediate layer Thin-film nanofibrous composite membrane Pervaporation membrane