Double-tailed hydrophobically associating polymer: synthesis and enhanced salt resistance properties under external stimuli

IF 5.2 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Liquids Pub Date : 2025-09-22 DOI:10.1016/j.molliq.2025.128586

Na Chen , Yuxin Luo , Jiaming Pan , Feng Jiang , Wanfen Pu

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引用次数: 0

Abstract

The thickening ability of water-soluble polymers is significantly diminished in the presence of metal ions. Here, we successfully developed a novel double-tailed hydrophobic monomer, 2-octyldodecyl methacrylate (ODMA), through a highly efficient one-step esterification process. Subsequently, ODMA was incorporated into hydrophobic association polymer (HAP) via free radical copolymerization with acrylamide (AM) and acrylic acid (AA). The resulting polymers exhibited remarkable salt-responsive rheological properties, with a viscosity of 1035 mPa·s in 150 g/L NaCl solution, significantly higher than that observed in fresh water (440 mPa·s). The viscosity and elasticity were also enhanced under external disturbances in rheological measurements. The phenomena are attributed to the strong hydrophobic interactions by the double tailed hydrophobic structure, which can be observed in the scanning electron microscopy images. This innovative strategy for constructing double-tailed hydrophobic association polymers provides valuable insights and a promising pathway for the rational design of next-generation salt-resistant polymeric materials.

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双尾疏水缔合聚合物的合成及其在外界刺激下增强的耐盐性能

在金属离子的存在下，水溶性聚合物的增稠能力明显降低。本研究通过高效一步酯化工艺，成功制备了一种新型双尾疏水单体-甲基丙烯酸二辛基十二烷基（ODMA）。随后，ODMA与丙烯酰胺（AM）和丙烯酸（AA）通过自由基共聚形成疏水缔合聚合物（HAP）。所得聚合物具有显著的盐响应流变性能，在150 g/L NaCl溶液中粘度为1035 mPa·s，显著高于在淡水中（440 mPa·s）。在流变学测量中，黏度和弹性在外界干扰下也有所增强。这种现象是由双尾疏水结构的强疏水相互作用引起的，这在扫描电镜图像中可以观察到。这种构建双尾疏水缔合聚合物的创新策略为下一代耐盐聚合物材料的合理设计提供了有价值的见解和有希望的途径。

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来源期刊

Journal of Molecular Liquids 化学-物理：原子、分子和化学物理

CiteScore

10.30

自引率

16.70%

发文量

2597

审稿时长

78 days

期刊介绍： The journal includes papers in the following areas: – Simple organic liquids and mixtures – Ionic liquids – Surfactant solutions (including micelles and vesicles) and liquid interfaces – Colloidal solutions and nanoparticles – Thermotropic and lyotropic liquid crystals – Ferrofluids – Water, aqueous solutions and other hydrogen-bonded liquids – Lubricants, polymer solutions and melts – Molten metals and salts – Phase transitions and critical phenomena in liquids and confined fluids – Self assembly in complex liquids.– Biomolecules in solution The emphasis is on the molecular (or microscopic) understanding of particular liquids or liquid systems, especially concerning structure, dynamics and intermolecular forces. The experimental techniques used may include: – Conventional spectroscopy (mid-IR and far-IR, Raman, NMR, etc.) – Non-linear optics and time resolved spectroscopy (psec, fsec, asec, ISRS, etc.) – Light scattering (Rayleigh, Brillouin, PCS, etc.) – Dielectric relaxation – X-ray and neutron scattering and diffraction. Experimental studies, computer simulations (MD or MC) and analytical theory will be considered for publication; papers just reporting experimental results that do not contribute to the understanding of the fundamentals of molecular and ionic liquids will not be accepted. Only papers of a non-routine nature and advancing the field will be considered for publication.