Long-chain alkyl (i.e., tetradecyl, hexadecyl, and octodecyl) methacrylate (MC), maleic anhydride (MA), and methylamidemorpholine (MCNR 2 ) were used in this study to prepare a series of MC−MA−MCNR 2 terpolymers and their amine compounds (MC−MA−MCNR 2 −a) to obtain efficient pour point depressants (PPDs) for diesel fuel. The MC−MA− MCNR 2 and MC−MA−MCNR 2 −a terpolymers were successfully synthesized and then characterized by Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic resonance ( 1 H NMR), and gel permeation chromatography (GPC). The effects of the addition of the PPDs on the solid point (SP) and cold filter plugging point (CFPP) of diesel fuel were also investigated. Furthermore, the interactions between the additives and wax crystals were elucidated through differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and rheological mechanics. Results indicate that all of the terpolymer PPDs significantly improved the performance of 0 # diesel fuel samples at low temperature. PPDC2 displayed the best performance in decreasing the SP and CFPP of diesel fuel by 19 and 11°C, respectively. In addition, DSC analysis showed that the terpolymer PPDs reduced the temperature of paraffin precipitation of diesel fuel. However, POM analysis showed that addition of the PPDs did not prevent wax precipitation completely but merely shifted the precipitation toward a lower temperature. Moreover, the addition of the terpolymer PPDs remarkably decreased the viscosity of diesel fuel.

Radioactive iodine in nuclear waste would be harmful to nature and human health. The design of adsorbents for iodine capture with high efficiency still remains a challenge. Herein, two highly conjugated twodimensional covalent organic frameworks (TFPB-BPTA-COF and TFPB-PyTTA-COF) have been successfully constructed.Both COFs possess high porosity, stability, and a high πconjugated framework. Impressively, TFPB-PyTTA-COF exhibits an excellent iodine uptake value of up to 5.6 g g À 1 , which is superior to most reported COF-based adsorbents for iodine capture.

Due to the large reversible capacities, transition-metal oxides have received a lot of interest as anodes for lithium-ion batteries. However, their poor electrical conductivity and dramatic volume change prevent them from being widely used in lithium-ion batteries. In this study, we present a double protection strategy by fabricating a pomegranate-like N-doped carbon-coated CoO x clusters supported on three-dimensional (3D) graphene framework structure (NC@CoO x @GF) to improve the electrochemical performance of CoO x in lithium storage. The hierarchical structure is constructed by the thermal transformation of Co-MOF to CoO x with N-doped carbon/graphene by using polyaniline-coated metal−organic framework (Co-MOF)/graphene oxide as precursors. The pomegranate clusters coupled with porous CoO x induced by the partial thermal collapse of the MOF with N-doped carbon were derived from polyaniline and 3D high-conductivity graphene frameworks. The confinement of the clusters effectively relieves the volume expansion of CoO x and significantly shortens the transport paths of electrons and ions in the composite. The robust 3D graphene frameworks further offer highly interpenetrated conductive networks. Therefore, the flexible NC@CoO x @ GF anode delivered a high capacity (at 0.1 A g −1 , 1153 mA h g −1 ), excellent rate performance (at 8 A g −1 , 337 mA h g −1 ), and superlong cycling stability (66.4% capacity retention after 2500 cycles at 1000 mA g −1 ).

G@PI/RGO is prepared by a combination of solvothermal reaction and carbonization. With good mechanical flexibility and high conductivity, it shows excellent performance when directly used as the cathode for LIB.