title: Deep-Eutectic Solvents as MWCNT Delivery Vehicles in the Synthesis of Functional Poly(HIPE) Nanocomposites for Applications as Selective Sorbents.
abstract: We report an alternative green strategy based on deep-eutectic solvents (DES) to deliver multiwalled carbon nanotubes (MWCNTs) for a bottom-up approach that allows for the selective interfacial functionalization of nonaqueous poly(high internal phase emulsions), poly(HIPEs). The formation and polymerization of methacrylic and styrenic HIPEs were possible through stabilization with nitrogen doped carbon nanotube (CNX) and surfactant mixtures using a urea-choline chloride DES as a delivering phase. Subtle changes in CNXconcentration (less than 0.2 wt % to the internal phase) produced important changes in the macroporous monolith functionalization, which in turn led to increased monolith hydrophobicity and pore openness. These materials displayed great oleophilicity with water contact angles as high as 140° making them apt for biodiesel, diesel, and gasoline fuel sorption applications. Overall, styrene divinylbenzene (StDvB) based poly(HIPEs) showed hydrophobicity and fuel sorption capacities as high as 4.8 (g/g). Pore hierarchy, namely pore openness, regulated sorption capacity, and sorption times where greater openness resulted in faster sorption and increased sorption capacity. Monoliths were subject to 20 sorption-desorption cycles demonstrating recyclability and stable sorption capacity. Finally, CNX/surfactant hybrids made it possible to reduce surfactant requirements for successful HIPE formation and stabilization during polymerization. All poly(HIPEs) retained acceptable conversion as a function of CNXloading nearing 90% or better with thermal stability as high as 283 °C.
authors: Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70820, United States.
authors: Arturo
authors: A
authors: Carranza
authors: Centro Universitario de Tonalá, Universidad de Guadalajara , Tonalá, Jalisco 45425, México.
authors: María G
authors: MG
authors: Pérez-García
authors: School of Renewable Natural Resources, Louisiana State University Agricultural Center , Baton Rouge, Louisiana 70803, United States.
authors: Kunlin
authors: K
authors: Song
authors: Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70820, United States.
authors: George M
authors: GM
authors: Jeha
authors: Department of Physics & Astronomy, Louisiana State University , Baton Rouge, Louisiana 70820, United States.
authors: Zhenyu
authors: Z
authors: Diao
authors: Department of Physics & Astronomy, Louisiana State University , Baton Rouge, Louisiana 70820, United States.
authors: Rongying
authors: R
authors: Jin
authors: Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México , Ensenada, Baja California 22860, México.
authors: Nina
authors: N
authors: Bogdanchikova
authors: Departamento de Ingeniería Química, Universidad de Guadalajara , Guadalajara, Jalisco 44430, México.
authors: Armando F
authors: AF
authors: Soltero
authors: Department of Physics and Center for 2-Dimensional and Layered Materials, Pennsylvania State University , University Park, Pennsylvania 16802, United States.
authors: Mauricio
authors: M
authors: Terrones
authors: School of Renewable Natural Resources, Louisiana State University Agricultural Center , Baton Rouge, Louisiana 70803, United States.
authors: Qinglin
authors: Q
authors: Wu
authors: Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70820, United States.
authors: John A
authors: JA
authors: Pojman
authors: CONACYT-Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México , Ensenada, Baja California 22860, México.
authors: Josué D
authors: JD
authors: Mota-Morales
keywords: carbon nanotubes; deep-eutectic solvent; fuel sorbents; high internal phase emulsion; hydrophobic; nanocomposite