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制备了两种水溶性富勒烯衍生物〔富勒烯透明质酸钠(MHAF60)、富勒烯聚乙烯吡咯烷酮(PPF60)〕,并对其护肤性能进行了测试。UV-Vis和FTIR结果显示,富勒烯依然保持了其特征吸收。DLS结果显示两种材料粒径分别为368.5nm和500.6nm。GC结果表明两种材料均无有机溶剂残留。EPR结果显示MHAF60淬灭自由基的能力要显著优于PPF60、维生素C和水溶性虾青素。以人表皮角质细胞(HEK-A)作为研究对象,测试了在双氧水损伤条件下MHAF60对细胞的修复和保护作用,结果显示MHAF60的效果显著优于维生素C和水溶性虾青素。斑马鱼模型试验结果显示MHAF60具有显著的抑制黑色素、抗炎修复功效,安全性更高。 相似文献
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为探讨水溶性富勒烯对人皮肤成纤维细胞的毒性,将人皮肤成纤维细胞与不同浓度水溶性富勒烯共孵育不同时间后,采用MTS法对人皮肤成纤维细胞的活性进行检测。结果表明,富勒烯浓度为7.5μg·mL~(-1)且共孵育时间在48 h以内时,富勒烯对人皮肤成纤维细胞产生微小的毒性;若浓度大于7.5μg·mL~(-1)或共孵育时间超过48 h,富勒烯对人皮肤成纤维细胞有较明显的毒性。因此,开发基于水溶性富勒烯产品时,应考虑一定条件下富勒烯材料可能存在的细胞毒性问题,当富勒烯材料与皮肤接触时,建议控制富勒烯材料的浓度在7.5μg·mL~(-1)以下,同时与人体皮肤的接触时间控制在48 h内为宜。 相似文献
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以富勒烯(C60)、溴素(Br2)、八溴富勒烯(C60Br8)及对甲基苯胺(C7H9N)为原料,经两步反应合成了富勒烯对甲基苯胺衍生物C60(NC6H4CH3)n;采用核磁共振碳谱(13C-NMR)、质谱(MS)、X射线光电子能谱(XPS)、傅里叶变换红外光谱仪(FT-IR)以及紫外-可见光分光光度计(UV-Vis)对合成得到的富勒烯对甲基苯胺衍生物结构进行了表征;采用差热分析(DTA)、真空安定性测试(VST)、热重分析(TGA)、甲基紫实验等热分析方法,并结合电子顺磁共振波谱法研究了富勒烯对甲基苯胺衍生物与硝化棉的相互作用规律和机理。结果表明,富勒烯对甲基苯胺衍生物将甲基紫试纸的变色时间由56min延长至95min;将单位质量硝化棉热分解释放的气体量由2.67mL/g降至1.46mL/g;将硝化棉的热失重率由17.17%降至5.46%;当富勒烯对甲基苯胺衍生物的质量浓度为0.76g/L时,其对氮氧自由基的清除率达到50%。表明富勒烯对甲基苯胺衍生物提高了硝化棉的安定性,且安定性能明显优于传统安定剂DPA和C2。 相似文献
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淀粉及其衍生物的疏水化改性研究进展 总被引:2,自引:0,他引:2
淀粉及其衍生物通过引入不同的疏水性基团进行疏水化改性,改进了淀粉产品的应用性能,使之具有许多新的独特性能,更好的适应了特定的应用要求。综述了迄今原淀粉和羧甲基淀粉、羟乙基淀粉、阳离子淀粉以及两性淀粉几种不同的水溶性淀粉的疏水化改性方法,以及疏水基团的引入对产品主要性能的影响。介绍了疏水化改性淀粉衍生物在造纸、污水处理、土壤改良、涂料塑料工业等领域的应用和发展前景。 相似文献
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水性光引发剂的研究进展 总被引:8,自引:2,他引:8
概述了水性光引发剂的研究背景 ,对水性光引发剂进行分类 ,并对水性二苯甲酮类和水性硫杂蒽酮类等几类典型的水溶性光引发剂的研究进展进行了介绍 相似文献
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Yuichi Kawato Toshiro Kamiusuki Shoji Watanabe 《Journal of surfactants and detergents》2006,9(4):391-394
A number of derivatives of thiocarboxylic acid were prepared from the reaction of 3-mercaptopropionic acid and alkyl halides,
and screened for anti-rust properties in water-soluble metalworking fluids. Aqueous metalworking fluids containing octylthiopropionic
acid or hexylthioacetic acid showed excellent anti-rust properties for water-soluble metalworking fluids. 相似文献
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以壳聚糖为原料,通过邻苯二甲酸酐封闭2位氨基,利用三聚氰氯将壳聚糖的6位羟基引入聚乙二醇(PEG2000)链上,得到水溶性较好的壳聚糖衍生物(TCSO-PEG2000)。用TCSO-PEG2000整理剂对涤纶织物进行处理,采用红外光谱和扫描电镜对整理剂及涤纶织物进行表征分析,研究整理剂的用量、焙烘时间、焙烘温度等对涤纶织物的强力、透气性、亲水性、抗静电等性能的影响。结果表明:在整理剂质量浓度为8 g/L、焙烘时间为5 min、焙烘温度为120℃时,涤纶织物具有较好的力学性能、亲水性能及抗静电性能。 相似文献
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Caroline Creuzet 《Polymer》2006,47(8):2706-2713
This paper concerns the preparation of new water-soluble alkylated derivatives of hyaluronan (HA); these derivatives were synthesized under mild aqueous and well controlled conditions. The first step was to prepare a HA derivative selectively modified with adipic dihydrazide (HA-ADH) with a substitution degree of 0.08; then, alkyl chains with different chain lengths were introduced with a substitution degree around 0.05. These polymers being still water-soluble exhibit associating properties in the presence of external salt. Formation of hydrophobic domains is demonstrated from fluorescence measurements in the presence of pyrene as a probe. Then, it is shown that the viscosity of polymer solutions in 0.1 M NaCl becomes non-Newtonian for HA grafted with C-10 and C-12 chains and increases rapidly with the polymer concentration over 1 g/L. When the polymer concentration increases, a gel-like behaviour was observed from rheological measurements with the G′ modulus larger than G″ in all the frequency range covered. The dependence of the shear stress on shear rate applied according to a continuous linear ramp provided evidence of the deformation or rupture of aggregates. The latter were shown to reform slowly. At the end, the influence of temperature was examined: first a slight increase in the modulus was observed followed by a decrease corresponding to reinforcement of the hydrophobic interactions. 相似文献
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Chitosan and 6-O-glycolchitosan, a water-soluble chitosan derivative, were oxidized by periodate. In the case of chitosan, only degradation products were obtained. With 6-O-glycolchitosan, however, water-soluble amphoteric polyelectrolyte derivatives of chitosan having higher molecular weight were obtained. The oxidized 6-O-glycolchitosan (OX-GC) showed a pH sensitive change of viscosity in aqueous solution. Moreover, the OX-GC hydrogel, cross-linked with glutaraldehyde, showed a pH sensitive swelling behavior. The OX-GC showed biodegradation behavior by lysozyme after acetylation. 相似文献
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