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Effects of polymers on the properties of hydrogels constructed using sodium deoxycholate and amino acid

机译：聚合物对脱氧胆酸钠和氨基酸构建水凝胶性能的影响

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摘要

The gelation behavior and properties of sodium deoxycholate (NaDC) and l-aspartic acid (Asp) in aqueous solution were investigated in detail at 25 degrees C. The linear polymer poly(2-(2-methoxyethoxy)ethyl methacrylate-co-oligo-(ethylene glycol) methacrylate) (P(MEO(2)MA(90)-co-OEGMA(10))) and star-shaped polymer poly(2-(dimethylamino)ethyl methacrylate-b-2-(2-methoxyethoxy)ethyl methacrylate) (CDPDPM) were introduced in NaDC/Asp hydrogels for exploring the effects of polymers on the properties of NaDC/Asp hydrogels and the mechanism underlying gelation processes by polymers was proposed. The hydrogels were characterized by phase behavior observation, polarized optical microscopy (POM), cryogenic scanning electron microscopy (cryo-SEM), X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and rheological measurements. Moreover, the adsorption performances of hydrogels with and without polymers to methylene blue (MB) were studied using a UV-vis spectrometer. The results indicated that the transition from sol to gel state was observed with an increase in the Asp concentration in the system. Both linear and star-shaped polymers can participate in the formation of a gel network structure, so that the density of network structure and the mechanical strength of hydrogels increased. Furthermore, it was found that the viscoelasticity of the CDPDPM-containing hydrogel was much higher than that of the P(MEO(2)MA(90)-co-OEGMA(10))-containing hydrogel under the same condition, indicating that CDPDPM performed better in strengthening the network structure of the hydrogels than P(MEO(2)MA(90)-co-OEGMA(10)) due to the special structure that provided more binding sites for hydrogen bonding and stronger hydrophobicity that inhibited the swelling and dissolution of hydrogels. On coming in contact with the MB solution, the CDPDPM-containing hydrogel can adsorb MB and maintain the hydrogel state for recycling. On the contrary, the NaDC/Asp hydrogel dissolved and P(MEO(2)MA(90)-co-OEGMA(10))-containing hydrogel collapsed in the MB solution. The properties of the hydrogels are expected to be tailored by introducing polymers with different properties, including the charge numbers, the number of available binding sites, and hydrophobic properties.
机译：在25℃下详细研究了水溶液中脱氧胆酸钠（NADC）和L-天冬氨酸（ASP）的凝胶化行为和性质。线性聚合物聚（2-（2-甲氧基乙氧基）甲基丙烯酸酯 - 共寡糖 - （乙二醇）甲基丙烯酸酯）（P（MEO（2）MA（90）-CO-OEGMA（10））））和星形聚合物聚（2-（二甲基氨基）乙基丙烯酸乙酯-B-2-（2-甲氧基乙氧基）在NADC / ASP水凝胶中引入了甲基丙烯酸乙酯）（CDPDPM），用于探索聚合物对NADC / ASP水凝胶的性能的影响，提出了聚合物的凝胶化方法的机制。通过相位行为观察，偏振光显微镜（POM），低温扫描电子显微镜（Cryo-SEM），X射线粉末衍射（XRD），傅里叶变换红外（FT-IR）光谱和流变测量的水凝胶。此外，使用UV-Vis光谱仪研究了具有和不具有聚合物与亚甲基蓝（MB）的水凝胶的吸附性能。结果表明，从系统中的ASP浓度增加，观察到从溶胶到凝胶状态的转变。线性和星形聚合物都可以参与形成凝胶网络结构的形成，使网络结构的密度和水凝胶的机械强度增加。此外，发现含CDPDPM的水凝胶的粘弹性远高于P（MeO（2）MA（90）-CO-OEGMA（10））的水凝胶在相同条件下的水凝胶，表明CDPDPM由于提供了更多的特殊结构，在加强水凝胶的网络结构方面表现优于水凝胶的网络结构，该特殊结构为氢键和抑制肿胀的更强的疏水性提供了更多的结合位点和更强的疏水性水凝胶的溶解。在与MB溶液接触时，含CDPDPM的水凝胶可以吸附MB并保持水凝胶状态以进行再循环。相反，NADC / ASP水凝胶溶解和P（MEO（2）mA（90）-CO-OEGMA（10）） - 在MB溶液中塌陷。预期水凝胶的性质预期通过引入具有不同性质的聚合物来定制，包括电荷数，可用结合位点的数量和疏水性质。

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  • 来源
    《RSC Advances》 |2018年第16期|共10页
  • 作者

    Guo Yi; Wang Ruijin; Shang Yazhuo; Liu Honglai;

  • 作者单位

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn Key Lab Adv Mat Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn Key Lab Adv Mat Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn Key Lab Adv Mat Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn Key Lab Adv Mat Shanghai 200237 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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