Modulating the Contact Angle between Nonpolar Polymers and SiO2 Nanoparticles

被引:0
作者
Majumder, Anirban [1 ]
Radzanowski, Anne N. [2 ]
Wang, Ching-Yu [1 ]
Mu, Yijiang [1 ]
Coughlin, E. Bryan [2 ]
Gorte, Raymond J. [1 ]
Vohs, John M. [1 ]
Lee, Daeyeon [1 ]
机构
[1] Univ Penn, Dept Chem & Biomol Engn, Philadelphia, PA 19104 USA
[2] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA
关键词
POLYETHYLENE; AGGREGATION; POLYSTYRENE; PARTICLES; DISPERSION; DYNAMICS; INSIGHTS; SILICA; SIZE;
D O I
10.1021/acs.macromol.4c00823
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Polymer-nanoparticle interactions play an important role in determining the morphology and properties of polymer nanocomposites and controlling the polymeric reactions involving heterogeneous catalysts. Here, we modulate the interactions between nonpolar polymers and nanoparticles by modifying the nanoparticle surface chemistry and quantify the interaction strength through direct contact angle measurements. We investigate the interactions of three nonpolar polymers, polystyrene, polyethylene, and polycyclooctene, with silica nanoparticles whose surface chemistry has been modified by atomic layer deposition of titania and calcium carbonate and by alkyl silanization. Significant differences in polymer-nanoparticle interactions are observed, which can be attributed to differences in the polarizability of the polymers and oxide surface composition. Compared to fully hydrogenated polycyclooctene, polycyclooctene is shown to have stronger interactions with most metal oxides; however, this trend is reversed following alkyl silanization of the silica nanoparticles, which makes the surface of the particles less polar. These differences in interactions can be leveraged to make polymer nanocomposites with unique properties and enable the selective conversion of polymers without the need for separations.
引用
收藏
页码:8554 / 8561
页数:8
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