With the assistance of nonionic surfactant （OP-10） and surface-selective surfactant （CH3COOH）, anatase TiO2 was prepared as an anode material for lithium ion batteries. The morphology, the crystal structure, and t...With the assistance of nonionic surfactant （OP-10） and surface-selective surfactant （CH3COOH）, anatase TiO2 was prepared as an anode material for lithium ion batteries. The morphology, the crystal structure, and the electrochemical properties of the prepared anatase TiO2 were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, electrochemical impedance spectroscopy （EIS）, and galvanostatic charge and discharge test. The result shows that the prepared anatase TiO2 has high discharge capacity and good cyclic stability. The maximum discharge capacity is 313 mAh.g^-1, and there is no significant capacity decay from the second cycle.展开更多
To decrease the moisture absorption and improve the mechanical properties of linen/polypropylene（PP） composites, linen was modified with silane N-β-（trimethoxysilyl） propyl]ethylenediamine（AAPTS）, surfactant tr...To decrease the moisture absorption and improve the mechanical properties of linen/polypropylene（PP） composites, linen was modified with silane N-β-（trimethoxysilyl） propyl]ethylenediamine（AAPTS）, surfactant trimethyloctadecylalmnonium bromide（STAB）, and both AAPTS and STAB, respectively. Fourier transform infrared（FTIR） spectra showed that the linen was successfully modified and alkyl chains were attached through different treatments. The linen and PP were compounded by melt compressing. The moisture absorption of linen was decreased after STAB and AAPTS-STAB modifications. The moisture absorption, mechanical property and thermal property of the composites were also characterized. The results show that the moisture absorption of the AAPTS-modified li- nen（F1） reinforced PP（PPF1） is 8.09%, which is higher than that of the unmodified linen reinforced PP（PPF）（7.89%）. The moisture absorption of the STAB-AAPTS-modified linen（F3） reinforced PP（PPF3） is 6.58%. The tensile strengths of PPF1 and PPF3 are 33.7 and 35.8 MPa, which are improved by 22.5% and 30% compared with that of PPF（27.5 MPa）, respectively. Nevertheless, the moisture absorption of the STAB-modified linen（F2） reinforced PP（PPF2） is decreased by 22.4%, and the tensile strength is improved by 30% compared with those of PPF. Scanning electron microscopy（SEM） analysis of the fractured surface confirms the good interfacial adhesion of PPF2 compared with those of other composites. Furthermore, the 5% mass loss temperatures of the composites are all higher than 290 ℃. Thus, linen modified with STAB is a promising reinforcement for biocomposites.展开更多
基金supported by the National Natural Science Foundation of China(No.20873046)the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.200805740004)the Project of Guangdong Province(No.2009B050700039)
文摘With the assistance of nonionic surfactant （OP-10） and surface-selective surfactant （CH3COOH）, anatase TiO2 was prepared as an anode material for lithium ion batteries. The morphology, the crystal structure, and the electrochemical properties of the prepared anatase TiO2 were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, electrochemical impedance spectroscopy （EIS）, and galvanostatic charge and discharge test. The result shows that the prepared anatase TiO2 has high discharge capacity and good cyclic stability. The maximum discharge capacity is 313 mAh.g^-1, and there is no significant capacity decay from the second cycle.
基金Supported by the National Natttral Science Foundation of China（No.21404013）, the Science and Technology Development Plan of Jilin Province, China（Nos.20130521003JH, 20140204039 GX, 20160101323 JC）, the Changchun Science and Technology Plan Project, China（No. 14KG105）, the Open Research Fund of the State Key Laboratory of Polymer Physics and Chemistry of China and the Research Project of Science and Technology of the Education Department of Jilin Province of China During the 12th Five-year Plan Period（No.2015-78）.
文摘To decrease the moisture absorption and improve the mechanical properties of linen/polypropylene（PP） composites, linen was modified with silane N-β-（trimethoxysilyl） propyl]ethylenediamine（AAPTS）, surfactant trimethyloctadecylalmnonium bromide（STAB）, and both AAPTS and STAB, respectively. Fourier transform infrared（FTIR） spectra showed that the linen was successfully modified and alkyl chains were attached through different treatments. The linen and PP were compounded by melt compressing. The moisture absorption of linen was decreased after STAB and AAPTS-STAB modifications. The moisture absorption, mechanical property and thermal property of the composites were also characterized. The results show that the moisture absorption of the AAPTS-modified li- nen（F1） reinforced PP（PPF1） is 8.09%, which is higher than that of the unmodified linen reinforced PP（PPF）（7.89%）. The moisture absorption of the STAB-AAPTS-modified linen（F3） reinforced PP（PPF3） is 6.58%. The tensile strengths of PPF1 and PPF3 are 33.7 and 35.8 MPa, which are improved by 22.5% and 30% compared with that of PPF（27.5 MPa）, respectively. Nevertheless, the moisture absorption of the STAB-modified linen（F2） reinforced PP（PPF2） is decreased by 22.4%, and the tensile strength is improved by 30% compared with those of PPF. Scanning electron microscopy（SEM） analysis of the fractured surface confirms the good interfacial adhesion of PPF2 compared with those of other composites. Furthermore, the 5% mass loss temperatures of the composites are all higher than 290 ℃. Thus, linen modified with STAB is a promising reinforcement for biocomposites.
