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Synthesis of core-shell acrylic-polyurethane hybrid latex as binder of aqueous pigment inks for digital inkjet printing

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Progress in Natural Science:Materials International 2012年第1期22卷 71-78页

作者： Jingfang Zhang a,Xuefeng Li a,Xinhao Shi a,Mei Hua a,Xingping Zhou b,Xiaqin Wang a,a State Key Laboratory for Modification of chemical Fibers and Polymer Materials,Donghua University,Shanghai 201620,China b College of chemical engineering and biotechnology,Donghua University,Shanghai 201620,China [a] State Key Laboratory for Modification of chemical Fibers and Polymer Materials Donghua University Shanghai 201620 China [b] College of chemical engineering and biotechnology Donghua University Shanghai 201620 China

Acrylic-polyurethane(PUA) hybrid aqueous emulsion with core-shell structure was prepared via semibatch emulsion copolymerization of the acrylate monomers(AC) in the presence of a commercial polyurethane dispersion as *** core-shell structure of the emulsion was observed by *** particle size and distribution of the emulsion was found to vary drastically with the core-shell *** thermal response properties of emulsion films were measured by DSC,and the results indicated the good compatibility between PA and PU moieties in PUA *** chemical structures of emulsion films were studied by FTIR,and the surface properties were tested by contact angle *** results supported the idea that the surface of the cast films was rich in polyurethane *** water resistance of the cast films became better by increasing the AC *** rheological properties of the latex and its utilization as a binder for aqueous pigment inks of digital inkjet printing were thoroughly investigated,indicating that the prepared hybrid emulsion could be used safely for aqueous pigment inks of digital ink jet printing.

关键词： Core-shell structure PUA hybrid emulsion Latex ink binder Rheological properties

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Synthesis and Crystal Structure of a 3D Manganese(Ⅱ) Metal-Organic Frameworks Based on 2-Thiobarbituric Acid

Synthesis and Crystal Structure of a 3D Manganese(Ⅱ) Metal-...

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中国化学会第六届全国结构化学学术会议

作者： Kai Liang~(1,*) 1 College of Chemistry,chemical engineering and biotechnology,University of Donghua, Shanghai,201620

Recently,Metal-Organic Frameworks(MOFs) have been focused because of their potential applications in adsorption,separation,gas storage,and heterogeneous *** we report a novel Metal-Organic Frameworks {[Mn(Htaab)(HO)2].2DMF}(Htaab is 2-thiobarbituric acid),which is characterized by IR,TG and single-crystal X-ray *** compound crystallizes in the tetragonal

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Dyeing Characteristics of Chitosan Biguanidine Hydrochloride Treated Wool Fabrics

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China Textile 2010年第4期000卷 52-59页

作者： ZHAO Xuea,HE JIN-xina,b a College of Chemistry,chemical engineering and biotechnology,Donghua University,Shanghai 201620,China bKey Lab of Textile Science&Technology,Ministry of Education,China College of Chemistry Chemical Engineering and biotechnology Donghua UniversityShanghai 201620China Key Lab of Textile Science & Technology Ministry of EducationChina

Chitosan biguanidine hydrochloride(CGH) has been synthesized by the guanidineylation reaction of chitosan with *** structures of CGH were characterized by Fourier transform infrared spectroscopy and 13CNMR *** this paper,we used citric acid(CA) as a crosslinking agent,mixed with CGH to perform a pad-drycure treatment on wool fabric to study reaction mechanism during crosslinking with the help of Fourier transform infrared spectroscopy(FT-IR) and scanning electron microscopy(SEM).Dyeing characteristics of CGH treated wool fabric was *** effects of CGH concentration,curing temperature,dipping time,pH value on color yield of reactive dyes on wool fibres were *** properties of the modified wool fabric to laundering and crocking have also been *** transform infrared spectroscopy(FT-IR) showed that CA produce esterification with the-OH group of the wool and transamidation with the-NH2 group of the CGH to form a *** electron microscopy(SEM) analysis showed the CGH firmly attached to the surface of wool *** was found that the CGH pretreated wool fabrics had significantly improved dyeability *** is worthwhile to mention that the CGH treated samples have antibacterial potential due to the antibacterial property of chitosan molecules and guanidinium salts.

关键词： CGH Dyeing Characteristics of Chitosan Biguanidine Hydrochloride Treated Wool Fabrics

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Asymmetric Synthesis ofβ-CF3-β-Amino Acid via Aza-Morita-Baylis-Hillman Reaction Betweenα,β-Unsaturated Esters and 2-Methyl-N-（2,2,2-Trifluoroethylidene）Propane-2-Sulfinamide

Asymmetric Synthesis ofβ-CF3-β-Amino Acid via Aza-Morita-B...

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中国化学会第十二届全国氟化学会议

作者： Wei Yu Yingle Liu Yangen Huang~* College of Chemistry chemical engineering and biotechnology Donghua University 2999 North Renmin Road Shanghai 201620 China College of Chemistry Chemical Engineering and Biotechnology Donghua University 2999 North Renmin Road Shangghai 201620 China

＜正＞Synthetic studies on fluorinatedα- andβ-amino acids as biologically relevant buiding blocks for synthesis of peptides andβ-lactams have attracted considerable attention in the past decades. 2-Methyl-N-（2,2,2-trifluoroethylidene）propane- 2-sulfinamide（1）,firstly reported by Kuduk in 2006 ,which was rapidly becoming a noticeable intermediate for the asymmetric synthesis of fluorinated

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Asymmetric Synthesis ofα-CF3-α-Propargylamines by Acetylide Addition to(S)-N-tert-Butylsulfinyl Ketimines

Asymmetric Synthesis ofα-CF3-α-Propargylamines by Acetylid...

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氟化学与美好生活——中国化学会第十一届全国氟化学会议

作者： Heng-Qiao Xiao~1,Yan-Gen Huang~(1,*) 1 College of Chemistry,chemical engineering and biotechnology,Donghua University,2999 North Renmin Road,Shanghai 201620,China

Chiral propargylamine is one of the most important building blocks for the synthesis of many drugs and natural products,and meanwhile the trifluoromethyl-containing compounds have attracted much attention in pharmaceutical, agrochemical and materials sciences,so the synthetic method for trifluoromethylated chiral propargylamines are worth being ***,we wish to report an example of the asymmetric synthesis ofα-trifluoromethylatedα-propargylamines by the addition of lithium acetylides to the chiral CF-substituted(S)-N -tert-butylsulfinyl ketimines.

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Electrospun 3-D macroporous nanoflbrous scaffolds from controllable patterning for cellular infiltration

Electrospun 3-D macroporous nanoflbrous scaffolds from contr...

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2011年第十一届上海地区医用生物材料研讨会——生物材料与再生医学进展

作者： Shifang Zhao,Huihua Yuan,Bei Feng,Hongju Peng,Yanzhong Zhang ~* College of Chemistry,chemical engineering & biotechnology,Donghua University,Shanghai 201620,P.R.China.

Electrospinning is an efficient means to produce nanofibrillar and porous scaffolds that resemble the native extracellular ***,one of the noted problems with electrospun scaffolds is that the inherently tiny pores do not promote adequate cellular infdtration and tissue *** address this challenge,we herein develop electrospun three-dimensional(3-D) macroporous nanofibrous scaffolds from designing and employing particular non-conductive template collectors that contain patterned topographical *** was found that surfacce pattern of non-conducting collector could be accurately replicated by the electrospun *** similar experimental observations suggested that surface topography of collector is the key factor that determine the deposition and the arrangement of electrospun fibers in an electrospinning process,rather than electric *** finding enabled us to use different collectors with patterned microstructure to increase the pore size of electrospun *** pore size and the porosity were highly enlarged,depending on the collector patterns.

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Improved phase homogeneity in electrospinning biomimetic composite nanofibers of gelatin/PCL

Improved phase homogeneity in electrospinning biomimetic com...

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2011年第十一届上海地区医用生物材料研讨会——生物材料与再生医学进展

作者： FENG Bei,TU Hongbin,LI Biyun,ZHAO Shifang,LI Qin,ZHANG Yanzhong~* College of Chemistry,chemical engineering & biotechnology,Donghua University,Shanghai 201620,P.R.China.

Electrospun gelain/PCL hybrid is a well-liked nanofibrous scaffolding material that have been widely used for biomimetically engineering a variety of ***,dissimilarity of the constituents in their physicochemical attributes would give rise to phase seperation within the fibrous *** study aims to 1) investigate the influence of phase seperation on the morphology,homogeneity,mechanical properties of the electrospun gelatin/PCL fibers,and 2) improve the phase homogeneity of electrospun gelatin/PCL nanofibers by using acetic acid(HAc).Our results showed that addition of a tiny amount(0.1%) of HAc remarkably improved the miscibility of gelatin and PCL which were dissolved in a common solvent of trifluoroethanol,and resulted in the formation of homogeneous and performance -optimized nanofibers upon *** culture experiment intended for skin tissue engineering indicated that thus modified electrospun gelatin/PCL scaffolds supported better cellular responsive behaviour.

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Electrospun HAp/CTS nanoflbrous scaffold as an inductive substrate for the osteogenic differentiation of mBMSCs

Electrospun HAp/CTS nanoflbrous scaffold as an inductive sub...

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2011年第十一届上海地区医用生物材料研讨会——生物材料与再生医学进展

作者： PENG Hongju,LI Biyun,TU Hongbin,LI Qin,ZHAO Shifang,ZHANG Yanzhong~* College of Chemistry,chemical engineering & biotechnology,Donghua University,Shanghai 201620,P.R.China.

Developing novel artificial matrices or scaffolds that can mimic the stem cell living niche represents a very promising approach to manipulating the differentiation of stem cells in regenerative *** study aims at determining the efficacy of using biomimetic nanoflbrous scaffolds of hydroxyapatite/chitosan(HAp/CTS) to induce mouse bone marrow stem cells(mBMSCs) to differentiate into osteogenic lineage in vitro,in the absence or presence of an osteogenic supplementation of ascorbic acid,(-glycerol phosphate,and *** electrospun chitosan nanoflbrous scaffolds as a control,it was found that the expression of bone-specific genes was significantly higher in mBMSCs growing on HAp/CTS than those on CTS alone scaffolds in both normal and osteogenic *** phosphatase staining and collagen assay confirmed that the nanoflbrous HAp/CTS scaffolds stimulated mBMSCs differentiation into the osteoblastic *** results suggest that the electrospun nanoflbrous HAp/CTS scaffolds are osteoconductive and osteoinductive,enabling to regulate the osteogenic commission of the mesenchymal stem cells.

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Aligned ultrafine fibers by stable jet electrospinning

Aligned ultrafine fibers by stable jet electrospinning

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2011年第十一届上海地区医用生物材料研讨会——生物材料与再生医学进展

作者： YUAN Huihua,ZHAO Shifang,LI Qin,LI Biyun,TU Hongbin,ZHANG Yanzhong~* College of Chemistry,chemical engineering & biotechnology,Donghua University,Shanghai 201620,P.R.China.

Electrospinning has been widely recognized as a novel platform technique to construct biomimicking scaffolds for tissue ***,there is a huge technological challenge in making aligned fibers and structures applicable to certain *** formulating the viscoelasticity of spinning dopes and supressing the jet bending instability,we currently demonstrated the feasibility of making single fibers,fiber yarns,and unidirectional fiber membranes with fiber fineness of a few microns in *** the WAXD and polarized Fourier transform infrared spectra results suggested that stable jet electrospinning encouraged polymer chain and crystalline orientation,which may contribute to significant improvement in the mechanical properties of thus made ultrafine fibers,as confirmed by the tensile *** jet electrospinning would enable us to biomimickingly engineer tissues like tendon or ligament,where fiber alignment,fineness,and mechanical performance are the major concerns while constructing such specific tissue engineering scaffold.

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Pd-Catalyzed Aerobic Dehydrogenative Cross-Coupling of Polyfluoroarenes with Thiophenes

Pd-Catalyzed Aerobic Dehydrogenative Cross-Coupling of Polyf...

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中国化学会第十二届全国氟化学会议

作者： Chun-Yang He ~Qiao-Qiao Min ~+ and Xingang Zhang~(* +) (+ Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Science College of Chemistry chemical engineering and biotechnology Donghua University) College of Chemistry Chemical Engineering and Biotechnology Donghua University Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy

＜正＞Molecules containing polyfluoroarene-thiophene structure play a primary role as active materials in electronic devices,such as organic light-emitting diodes（OLEDs） and field-effect transistors（FETs）.Hence,it is of great synthetic interest to develop efficient reactions to access *** recently,we successfully developed an efficient method for the synthesis

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