最新刊期
      卷 20 ， 期 6 ， 2007
      • Rong JIN,Zhi-yuan ZHONG,Johan F.J. Engbersen,Jie YIN
        Vol. 20, Issue 6, Pages: 1-7(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.001
        摘要：Gene delivery system is indispensable for gene therapy .Recently , research on polymeric gene delivery vectors aims at developing non low cytotoxic cationic polymers for safe and efficient gene transfer .As a family of natural compounds , carbohydrate-based cationic polymer vectors are widely studied and applied to gene delivery due to their good biocompatibility and low cytotoxicity .This review describes the mechanism of polymeric gene delivery processes .Also , the latest typical carbohydrate-based polymers as non-viral vectors are reviewed .  
        关键词：Non-viral vectors;Gene delivery;Carbohydrate   
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        发布时间：2022-09-18
      • Ming-yan HAO,Xiao-ling HU,Ping GUAN,Feng YANG
        Vol. 20, Issue 6, Pages: 8-14(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.002
        摘要：As a novel separation technique with high selectivity and efficiency, molecularly imprinted membrane (MIM) is a high pot of research .By the addition template molecule in the process of preparation, MIM is endowed with memory and recognition function, could usd to separate the template molecule .A brief introduction of Molecularly imprinting technology (MIT) and preparation of molecularly imprinted membrane is outlined .This review is mainly about the effective factors of preparation of MIM.Future development of MIM is also related in this paper.  
        关键词：Molecularly imprinting;Separation membrane;Preparation   
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        发布时间：2022-09-18
      • Lian-long HOU,Gui-sheng YANG
        Vol. 20, Issue 6, Pages: 15-23(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.003
        摘要：In this paper, based on the polymerization mechanism and combined with the concrete demands of modification in practical applications, the recent developments of modified MCPA6 were reviewed .Especially the modification of organic molecules on MCPA6 was expatiated .Thereinto, such studies of MCPA6 modified by adding polymers were discussed in detail from the modified mechanism and the morphology .Further, the studies in recent years and the development directions in the future were brought forward and summarized .All the above-mentioned researches could be referenced and widen the application scope of nylon materials .  
        关键词：MCPA6;Modification;Compatibility;Toughened   
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        发布时间：2022-09-18
      • Yong-bin ZHU,nan-ying NING,yang SUN,qin ZHANG,Qiang FU
        Vol. 20, Issue 6, Pages: 24-31(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.004
        摘要：Functionally Gradient Materials (FGM) is a new type of inhomogeneous composites .Polymeric Gradient Materials(PGM)is a kind of FGM based on polymer matrix.For its particular morphological structure, functions and potential applications,PGM attracted more scientists’attentions since it is proposed.In this paper,the present status of research on PGM are reviewed including conception,preparation,characterization and application. Moreover,the direction of development of PGM in the future is prospected.  
        关键词：Polymer;Gradient material;PGM;Preparation   
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        发布时间：2022-09-18
      • Chao WANG,Jing-xue PAN,Zhan-kui DU,Zheng-yu YANG
        Vol. 20, Issue 6, Pages: 32-37(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.005
        摘要：Among the three natural macromolecules that constitute the biomass like straws and stalks,only lignin has the mole ratio of C,H,O (1∶1∙3∶0∙3)closed to that of crude petroleum (1∶1∙6∶0∙05).In this paper,rice straw was pretreated by weak acid and cellulase,92∙5% hemicellulose and72% cellulose were removed.And the sample that contained36% lignin was further reformed at low temperature (320℃,10MPa) to obtained gasoline and diesel oil fractions,that is, "bio-petroleum" .Compared with the oil obtained from rice straw,the relative content of long chain hydrocarbons were increased greatly(32∙5%),while the relative content of the oxygenous compounds were decreased.So,the components of the oil were concentrated on the benzene and phenolic compounds,which was favor for further separation to obtain gasoline and diesel oil products with high value.  
        关键词：Natural micromolecule;Lignin;Bio-petroleum;Long-chain alkane   
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        发布时间：2022-09-18
      • Yong YANG,Xiao-qing DONG,Lei ZHANG,Jin CHANG
        Vol. 20, Issue 6, Pages: 38-44(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.006
        摘要：Various cholic acid modified lysine grafted chitosan(CA-LysCS) with the same degrees of substitute (DS) of cholic acid (4∙2%) and different degrees of substitute (DS) of Lysine(2∙3%,4∙7%,9∙3%) were synthesized with the EOC as the coupling reagent.Structural characteristics of these products were investigated using FT-IR and 1HNMR.The critical aggregation concentration(CAC) of the self-aggregate of CA-LysCS were determined by measuring the fluorescence intensity of the pyrene as a fluorescent probe,which increased with increase of DS of Lysine in the range of 1∙1~5∙3×10-2 mg/mL.The average particle size of self-aggregates in distilled water also increased with the increase of the DS of Lysine in the range of 164∙6~414∙3nm.These self-assembly nanoparticles were tagged using TOPO-capped green quantum dots (QDs).A transmission electron microscopy study showed that the quantum dots located in the hydrophobic core of the micelles.The flurescence intensity of green Quantum dots decreased after encapsulated mainly due to the covering of the micelles.  
        关键词：Chitosan;Cholic acid;L-Lysine;Nanoparticles;Self-assembly;Quantum dots   
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        发布时间：2022-09-18
      • Hong-yu LI,Qiang LI,Bo MENG
        Vol. 20, Issue 6, Pages: 45-51(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.007
        摘要：Macroporous and hollow titania materials have a wide range of applications,such as lightweight structural materials,catalytic supports,thermal and acoustic insulators,and photoelectric devices,because of their unique properties,like as high specific surface area,high damping capacity,low thermal conductivity,and low dielectric permittivity.This review summarizes research work of synthesizing structured titania materials including macroporous materials,and hollow capsules and tubes.Inverse opaline titania (photonic crystal) materials template synthesized using colloidal particle assembled templates are emphasized.Template synthesis of titania hollow spheres and nanotubes is also reviewed.  
        关键词：Titania;Photonic crystals;Macroporous materials;Hollow capsules;Nanotubes   
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        发布时间：2022-09-18
      • Yuan JIN,Ming JIANG,Yan PENG,Bin LÜ,Kang DAI
        Vol. 20, Issue 6, Pages: 52-56(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.008
        摘要：Molecular imprinting Technique(MIT),a new technology to produce molecular imprinting polymers (MIPs),developed rapidly in recent decades.It combined high polymer chemistry and biochemistry.MIPs had selective identify character,which is necessary for sensor making.Now more and more interest has been attracted in this area.This article describes recent trends and some examples of sensors based on molecular imprinting.  
        关键词：Molecular imprinting;Molecular imprinting polymers (MIPs);Sensors   
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        发布时间：2022-09-18
      • Tian-fang CUI,Xin ZHANG,Yu-chun ZHAI,Er-ting CHEN
        Vol. 20, Issue 6, Pages: 57-62(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.009
        摘要：The synthetic methods of Poly(p-phenylene benzobisoxazole) (PBO) were elaborated through the polycondensation in PPA,trimethylsilanization,mesophase polymerization,and the method of TA salt in this paper. And a novel method was also introduced for preparing PBO as developed by the homopolycondensation of a new ABPBO monomer,2-(4-methoxycarbonylphenyl)-5-amino-6-hydroxybenzoxazole (MAB),which was innovatively synthesized by the selective reduction of 4,6-dinitroresorcinol (DNR),then condensation cyclization with 4- methoxycarbonylbenzoylchloride and finally catalytic hydrogenation.Finally the synthetic methods of other homogeneous poly(benzobisoxazole)s were reviewed by exemplifying the type of chain alkene,the polycyclic type,the type of bephenyl,the heterocyclic type demonstrated.  
        关键词：Poly(p-phenylene benzobisoxazole);Poly(benzobisoxazole)s;Synthetic methods   
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        发布时间：2022-09-18
      • Bin GUO,Yong HEN,Xing-wei CHI,Zhen-yang LUO,Fu-sheng LIU,Li-jun ZHU,Mei-jing SONG,Ya-jun LI
        Vol. 20, Issue 6, Pages: 63-66(2007) DOI: 10.14028/j.cnki.1003-3726.2007.06.010
        摘要：The concentration measurements of two typical water soluble polymers were performed by means of ultraviolet spectroscopy,it is easy to operate and suitable to be a teaching experiment.  
        关键词：Ultraviolet spectroscopy;Concentration of polymers;Teaching;Experiment   
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        发布时间：2022-09-18
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