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A robust method to calculate the volume phase transition temperature (VPTT) for hydrogels and hybrids

机译:一种计算水凝胶和杂种体积相变温度(VPTT)的鲁棒方法

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摘要

Here, we report three different methods to determine the volume phase transition temperature (VPTT) of various systems including poly(N-isopropylacrylamide) (pNIPAm) based nanogels, Au nanoclusters and a combination of inorganic and polymeric systems. Although all the methods reveal close VPTT values, we suggest that method III is the least computation dependent and most reliable. In an attempt to define the overall system reversibility, a predictive reversibility parameter (RP) was defined that explains the system behavior at each state point. RP takes into consideration all the system states during both heating and cooling cycles. Reversible systems were found to have RP values less than 1, while irreversible systems were observed to have RP values of 2. We predict that real systems will show RP values between 1 and 2. Thus, by knowing both the system's VPTT and its reversibility, a particular application can be designed or upgraded.
机译:在这里,我们报告了三种不同的方法来确定各种系统的体积相转变温度(VPTT),包括聚(N-异丙基丙烯酰胺)(PNIPAM)的纳米粒子,Au纳米能器和无机和聚合物系统的组合。 虽然所有方法都揭示了关闭的VPTT值,但我们建议方法III是依赖于计算最少,最可靠的。 在尝试定义整体系统可逆性的尝试中,定义了一种预测的可逆性参数(RP),其解释了每个州点处的系统行为。 RP在加热和冷却循环期间考虑所有系统状态。 发现可逆系统具有小于1的RP值,而观察到不可逆的系统具有2.我们预测真实系统将在1和2之间显示RP值。因此,通过了解系统的VPTT和其可逆性, 可以设计或升级特定应用程序。

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  • 来源
    《RSC Advances》 |2017年第84期|共11页
  • 作者单位

    Norwegian Univ Sci &

    Technol NTNU Dept Chem Engn Ugelstad Lab N-7491 Trondheim Norway;

    Norwegian Univ Sci &

    Technol NTNU Dept Chem Engn Ugelstad Lab N-7491 Trondheim Norway;

    Norwegian Univ Sci &

    Technol NTNU Dept Chem Engn Ugelstad Lab N-7491 Trondheim Norway;

    Norwegian Univ Sci &

    Technol NTNU Dept Chem N-7491 Trondheim Norway;

    Norwegian Univ Sci &

    Technol NTNU Dept Chem Engn Ugelstad Lab N-7491 Trondheim Norway;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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