壳聚糖及其衍生物对钙离子的吸附性能

利用壳聚糖及相应衍生物在不同pH值和反应时间等条件下对Ca^2 吸附性能进行表征，得到经不同化学改性的壳聚糖衍生物对Ca^2 吸附能力变化的有关信息。     

国产和进口亚磷酸酯抗氧剂的对比和评价

为了考察辅助抗氧剂168(亚磷酸酯类)的应用性能,对几种进日、国产抗氧剂168进行了对比和评价研究,重点对抗氧剂168在树脂后加工中的性能进行系统的考察。     

壳聚糖及其衍生物的吸附特性研究进展

综述了壳聚糖及其衍生物对重金属离子、酸和有机染料等吸附特性的研究进展。     

壳聚糖及其衍生物的吸附特性研究进展

综述了壳聚糖及其衍生物对重金属离子、酸和有机染料等吸附特性的研究进展。     

亚磷酸酯抗氧剂TNP的合成及评价

以壬基酚与三氯化磷为原料,合成了三壬基苯基亚磷酸酯抗氧剂（TNP）,采用正交设计的实验方法,考察了反应温度,保温时间,搅拌转速等对产品质量的影响,并对所得产品进行了性能评价,结果表明,亚磷酸酯类抗氧剂TNP有良好的抗热氧老化性能,可用作合成橡胶不变色稳定剂。     

壳聚糖质活性炭对亚甲基蓝的吸附性能研究

用壳聚糖制成活性炭,研究其对亚甲基蓝的吸附能力,并分析了吸附动力学以及吸附等温线。结果显示,壳聚糖质活性炭对亚甲基蓝最佳的吸附条件为:投入量为0.3 g,吸附时间为60 min,亚甲基蓝体积为10 mL;吸附温度为50℃,吸附过程较为符合二级吸附动力学方程、Freundlich模型。     

N-马来酰化壳聚糖的合成和性能

通过酰化反应,制备一系列取代度不同的N-马来酰化壳聚糖。测定了产物的取代度、特性黏度、相对分子质量、吸湿保湿性,并用IR、NMR进行结构表征。研究发现高取代度高相对分子质量高黏度产物(M-11)的吸湿保湿性、抑菌性均优于透明质酸,有望替代昂贵的透明质酸,开辟壳聚糖新的应用范围。     

Synthesis and characterization of chitosan alkyl carbamates

The synthesis of chitosan methylcarbamate (ChMC) and ethylcarbamate (ChEC) is described by using a new methodology. Polymers with substitution degrees up to 63% for ChEC and 68.5% for ChMC were obtained. Derivatives with lower substitutions were acid soluble but those with higher ones were completely insoluble. This could be due to the loss in hydrophilic sites when the substitution degree increases. The reaction conditions and degree of substitution obtained for both derivatives were also described. A complete chemical characterization was carried out by spectroscopic techniques. The thermal degradation of chitosan and derivatives were studied in the range 25–500°C and both derivatives were shown to be thermally less stable than chitosan. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2742–2747, 2002     

Synthesis,characterization, and antimicrobial activity of chitosan hydrazide derivative

A series of modified chitosan derivatives 1–4 has been synthesized. Modification process of chitosan was achieved through a sequence of four reactions starting by protection of its amino group with benzaldehyde (derivative 1), followed by reaction with epichlorohydrine (derivative 2), then reaction with benzhydrazide (derivative 3), and finally restoring the free amino groups on the chitosan by removing of benzaldehyde molecules (derivative 4). These four derivatives were characterized by elemental analyses, FTIR, and X-ray. The four chitosan derivatives showed better antibacterial and antifungal activities than that of chitosan. Derivative 4 exhibited the highest antimicrobial activity relative to the other derivatives.     

Synthesis and property of nanosized palladium catalysts protected by chitosan/silica

A chitosan (CTN)/silica‐supported nanosized palladium catalyst was obtained from a silica‐supported chitosan palladium complex through a complex transition method. An adsorption model was employed to simplify the structure of the di‐supporter. It was indicated that when the polymer coil adsorbed on the silica surface with even a monolayer the catalytic activity would reach an optimum value, and different situations of the, nanosized palladium particles would cause a different catalysis. The molar ratio of the chitosan structure unit to the palladium would affect the metal's size, which therefore influenced its catalytic activity. The experimental results corresponded with the inferences. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 85: 989–994, 2002     

离子液体中壳聚糖磷酸吡哆醛席夫碱衍生物的合成与表征

引言壳聚糖是自然界中唯一含有氨基的碱性多糖,具有多样的生物活性、极好的生物相容性、生物可降解性以及无毒性等特性,是一种新兴的生物功能材料[1-3]。磷酸吡哆醛是维生素B6参与多种代谢反应的一种活性形式。磷酸吡哆醛作为一种辅酶参与所有转氨基反应及一些氨基酸的脱羧及脱氢反应。研究表明,磷酸吡哆醛不但可以用于预防治疗高血压、心血管疾病及糖尿病等,还可用于治疗迟发性运动障碍和治疗难治性儿童期癫痫[4-5]。王涛等[6]以壳聚糖微球为载体,然后固定磷酸吡哆醛等制备得到了低密度脂蛋白亲和吸附剂,用于去除高脂血症患     

壳聚糖及其衍生物在医药领域的应用

简要介绍了壳聚糖及其衍生物在医药领域的应用.展望了随着各种壳聚糖衍生物的合成成功,将有更多符合医药用标准的新型材料得到广泛应用.     

壳聚糖衍生物的合成及其在化妆品中的应用

综述了目前几类壳聚糖衍生物：羧甲基壳聚糖、羧基壳聚糖、壳聚糖羟烷基衍生物、壳聚糖或酰基化衍生物、壳聚糖磺化衍生物、壳聚糖季铵盐的制备方法．分别介绍了它们的性能和在护肤品、洗发香波、头发调理剂、定型剂以及洗浴剂中的应用，同时举出了较典型的应用实例，为此方面研究工作提供了参考配方。     

全氟辛酸聚甘油酯的合成及其防雾滴性能

由全氟辛酸与聚甘油在无溶剂条件下发生酯化反应,制得全氟辛酸聚甘油酯,对反应温度、反应时间、反应原料摩尔比、催化剂种类4个主要影响因素进行了正交试验.实验结果表明,在催化剂作用下,全氟辛酸和聚甘油的摩尔比为1:1.4,205℃下反应6 h时,全氟辛酸聚甘油酯的酯化率最高达95.9%.通过红外光谱和核磁共振氢谱等表征手段对其进行了结构表征.     

壳聚糖及其衍生物对重金属吸附性能的研究

壳聚糖分子中含有大量的氨基和羟基,可以进行多种化学改性,得到相应的衍生物。改性前后的壳聚糖对重金属都具有吸附作用,可以作为重金属离子的富集剂。文章综述了近年来壳聚糖及其衍生物在吸附重金属方面的研究进展,对比了不同产品对重金属的吸附容量和选择性,以及它们所适用的条件。文章指出,进一步开发水溶性和螯合能力优良的壳聚糖衍生物是今后研究的方向。     

壳聚糖的改性及其应用进展

介绍了壳聚糖的结构;重点论述了壳聚糖的一些主要的改性方法,包括醚化、氧化、酰化、交联、烷基化、接枝共聚、季铵化及和其他材料复合等方法;并综述了壳聚糖及其衍生物在水处理、医药、食品加工及其他领域的应用现状。