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  1. No Access

    Article

    On the Relationship Between the Roots of Cubic Equations of State and New Perspectives of the Vapor–Liquid Equilibrium Calculation

    Based on the root–coefficient relations for a cubic function, quadratic functions are constructed that strictly relate the saturated volumes of liquid and vapor phases and the third solution from a cubic equat...

    Hongqin Liu in International Journal of Thermophysics (2023)

  2. No Access

    Article

    Effects of different macrodiols as soft segments on properties of waterborne polyurethane

    Waterborne polyurethane (WPU) with different macromolecular diols as soft segments was synthesized by the acetone dilution method. Fourier transform infrared (FTIR) spectroscopy, particle size and distribution...

    Nan Song, **ulan **n, Hongqin Liu, Baocai Xu, Bin Li… in Journal of Polymer Research (2019)

  3. No Access

    Article

    Synthesis, Characterization and Properties of N-Alkyl-N,N-di(2-hydroxyethyl) Amine Oxides

    N-Dodecyl-N,N-di(2-hydroxyethyl) amine oxide (C12DHEAO) and N-stearyl-N,N-di(2-hydroxyethyl) amine oxide (C18DHEAO) were synthesized with N-alkyl-diethanolamine and hydrogen peroxide. The...

    Hongqin Liu, Guoying Shi, Baocai Xu, Shuyu Chen… in Journal of Surfactants and Detergents (2017)

  4. No Access

    Article

    Synthesis, Surface Activities and Toluene Solubilization by Amine-oxide Gemini Surfactants

    A series of amine-oxide gemini surfactants featuring amide groups [N, N’-dimethyl-N, N’-bis(2-alkylamideethyl)-ethylenediamine oxide (alkyl = C11H23, C13H27, C15H31, C17H35)] have been synthesized via a three-ste...

    Hongqin Liu, Jun Hu, Baocai Xu, Tingting Zhao… in Journal of Surfactants and Detergents (2016)

  5. No Access

    Article

    Prediction of the friction torque in grease lubricated angular contact ball bearings using grey system theory

    The development of special grease makes it possible for angular contact ball bearings to operate at high speed and temperature; however, as an important performance parameter, friction torque of bearings lubri...

    Baomin Wang, Chao Gao, Zaixin Wu… in Journal of Mechanical Science and Technolo… (2016)

  6. No Access

    Article

    Synthesis, Corrosion Inhibition Performance and Biodegradability of Novel Alkyl Hydroxyethyl Imidazoline Salts

    New alkyl hydroxyethyl imidazoline salts were synthesized via a high pressure process with imidazoline and dimethyl carbonate, and their chemical structure were confirmed using mass spectral fragmentation and ...

    Hongqin Liu, Jun Hu, **aoze Zhou, Dan Liu… in Journal of Surfactants and Detergents (2015)

  7. No Access

    Chapter and Conference Paper

    Study on RMB Cross-Border Settlement in China’s Foreign Trade Enterprises

    RMB Cross-border Settlement is an important step in international settlement and has a special influence on Chinese enterprises. This paper summarizes its implementation course and outcome in China, and then a...

    Hongqin Liu in Proceedings of the 2nd International Confe… (2013)

  8. No Access

    Article

    Synthesis, Characterization and Properties of New Lauryl Amidopropyl Trimethyl Ammoniums

    A new lauryl amidopropyl trimethyl ammonium methyl carbonate with the formula CH3(CH2)10CONH(CH2)3N+(CH3)3CH3CO3 − was synthesized via a high pressure process with tertiary amines and dimethyl car...

    Hongqin Liu, Fei Li, Baocai Xu, Guiju Zhang… in Journal of Surfactants and Detergents (2012)