Physical Chemistry Chemical Physics The thermoelectrochemistry of lithium–glyme solvate ionic liquids: towards waste heat harvesting School of Chemistry, UNSW Australia, Sydney, Australia Phys. Chem. Chem. Phys.18 Thermoelectrochemistry offers a simple, scalable technique for direct conversion of waste heat into useful electricity. Here the thermoelectrochemical properties of lithium–glyme solvate ionic liquids, as well as their dilute electrolyte analogues, have been investigated using mixtures of tetraglyme (G4, tetraethylene glycol dimethyl ether) and lithium bis(trifluoromethylsulfonyl)imide (Li[NTf2]). The thermoelectrochemical process is entropically-driven by release of the glyme from the lithium–glyme complex cation, due to electrodeposition of lithium metal at the hotter lithium electrode with concomitant electrodissolution at the cooler lithium electrode. The optimum ratio for thermochemical electricity generation is not the solvate ionic liquid (equimolar mixture of Li[NTf2] and glyme), but rather one Li[NTf2] to four G4, due to the mixtures relatively high ionic conductivity and good apparent Seebeck coefficient (+1.4 mV K−1).

Determination of the lithium–glyme mixture thermal conductivity enabled full assessment of the Figure of Merit (ZT), and the efficiency relative to the Carnot efficiency to be determined. As the lithium electrodeposits are porous, alternating the temperature gradient results in a system that actually improves with repeated use.E-mail: bordes@chalmers.se.AbstractThe adsorption of three dicarboxylic amino acid-based surfactants, disodium N-lauroylaminomalonate, disodium N-lauroylaspartate, and disodium N-lauroylglutamate, has been studied by surface plasmon resonance (SPR) and the quartz crystal microbalance with dissipation monitoring (QCM-D). These surfactants have high cmc values, which means that the unimer concentration is high at the plateau value of adsorption. This gives rise to a considerable “bulk effect”, which must be deducted from the observed value in order to obtain the true value of the adsorbed amount. In this article, we show how this can be done for the QCM-D technique.

Adsorption is studied on silica, gold, gold hydrophobized by a self-assembled layer of an alkane thiol, and hydroxyapatite. Adsorption on hydroxyapatite differs very much among the three surfactants, with the aspartate derivative giving the strongest and the glutamate giving the weakest adsorption. This difference is explained as the difference in ability of the dicarboxylic amphiphiles to chelate calcium in the crystal lattice. Supporting InformationNMR data of C12MalNa2, C12AspNa2, and C12GluNa2. Skip over navigation to the main contentDocument PreviewInfluence of Sample Cleaning Prior to the Analysis on the Elemental Content of the Lichen Xanthoria parietina (L.) Th.Fr.PDF not available. †‡4DOI: *E-mail: zye@laurentian.ca.SynopsisA new ionomer functionalization strategy is demonstrated for rendering modified cellulose nanocrystals as a sustainable class of bionanofillers for better reinforced polymer nanocomposites.AbstractIn this article, we demonstrate the first surface modification of cellulose nanocrystals (CNCs) with quaternary ammonium-containing ionomers by ionic binding of their positively charged ammonium ions onto the negatively charged surface of CNCs.

A range of hyperbranched polyethylene ionomers (I1–I6) having different ionic content (0.2–2.3 mol %) has been designed and employed for this purpose. germ guardian ac5000 uvc and hepa air purifierThe simple dropwise addition and mixing of the aqueous dispersion of CNCs with the ionomer solution in tetrahydrofuran (THF) conveniently renders the ionomer-modified CNCs (mCNC1–mCNC6). novita air purifier 301The presence of adsorbed ionomers on the modified CNCs is confirmed with spectroscopic and X-ray diffraction evidence and quantified through thermogravimetric analysis. honeywell high efficiency electronic air cleaner f300e1035The effects of the ionomer to CNC feed mass ratio and the ionomers of different ionic content on the modification have been examined.

A study on the morphology of the modified CNCs by atomic force microscopy discloses the occurrence of side-to-side and/or end-to-end assembly of the CNC rods due to the “cross-linking” or bridging effects of the multidentate ionomers. Because of the hydrophobic hyperbranched polyethylene segments in the adsorbed ionomers, the modified CNCs can be dispersed in nonpolar or low-polarity organic solvents (such as THF, toluene, and chloroform). In particular, the THF dispersions of modified CNCs prepared with ionomers having ionic content ≥0.7 mol % (I3–I6) behave as thixotropic organo-gels at concentrations ≥40 mg mL–1. Further, the modified CNCs better disperse than unmodified CNCs in a hydrophobic ethylene–olefin copolymer (EOC) elastomer matrix and show better thermal stability than a surfactant-modified CNC sample. Tensile testing confirms that the EOC composites, filled with the ionomer-modified CNCs, are significantly reinforced with a tensile modulus nearly doubled that of neat EOC, and they demonstrate better elongation at break relative to those filled with unmodified CNCs or surfactant-modified CNCs.Keywords: BionanofillerCellulose nanocrystalsCompositesDispersionIonomersModificationReinforcement Supporting InformationThe Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acssuschemeng.6b01253.Summary of synthesis and structural characterization of the ionomers;

1H NMR spectra of the ionomers; AFM phase images of unmodified CNCs and modified CNCs; AFM images of control samples; small amplitude dynamic oscillation data of organo-gels of mCNC3-3, mCNC4, and mCNC6 in THF; viscosity-shear rate curves of organo-gels of mCNC3-3, mCNC4, and mCNC6 in THF; TGA curves of the EOC composites; DSC crystallization curves of various EOC composites (PDF)View: ACS ActiveView PDF | March 2016, Volume 42, Issue 3, pp 2487–2500Magnetic nickel ferrite nanoparticles as an efficient catalyst for the preparation of polyhydroquinoline derivatives under microwave irradiation in solvent-free conditionsArticleFirst Online: 07 July 2015Received: 27 January 2015Accepted: 01 July 2015DOI: 10.1007/s11164-015-2163-6Cite this article as: Ahankar, H., Ramazani, A. & Joo, S.W. Res Chem Intermed (2016) 42: 2487. doi:10.1007/s11164-015-2163-6AbstractAn easy and convenient method is reported for the synthesis of polyhydroquinoline derivatives in solvent-free conditions under microwave irradiation in the presence of magnetic nickel ferrite nanoparticles (NiFe2O4 MNPs) as a catalyst.