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您的检索式：作者名="DONG Chenjun"
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| 1 | Chemical Modifications on Linen forUnsaturated Polyester Composites显示文摘Linen was chemically modified by oleoyl chloride(OC) and stearoyl chloride(SC) to graft fatty moietiesonto fiber via ester connections. Pyridine was used as solvent. The reaction was simplified by reacting the compoundsin air at 60℃ for 6 h. Fourier transform infrared spectroscopy(FTIR) and thermal gravimetric analysis were con-ducted to characterize the treated fiber. The FTIR result confirms that the fatty portions have been successfullygrafted onto the fiber after the chemical modification. The thermal stability of the SC-modified linen(SCL) was simi-lar to that of the flax modified by oleoyl chloride(OCL). SCL and OCL demonstrated a temperature of 5% mass loss,which was above 200 ℃ and could meet the requirements of the processing conditions for most composites. The-reafter, the SCL-reinforced unsaturated polyester(UPE) composites were prepared and characterized. The compositepresented a much better impact strength of 61.1 J/m and tensile modulus of 1.69 GPa than those of UPE with appli-cable thermal stability. SCL has been shown to be a promising choice as reinforcing material for composites. | HU Qiuxue YAN Xinxin DONG Chenjun HU Wei | 2016 | Chemical Research in Chinese Universities2016，32，6： | 1 |
| 2 | Carboxyl-functionalized Nanocellulose Reinforced Nanocomposite Proton Exchange Membrane显示文摘Nanocellulose(NCC) was prepared through the acid hydrolysis of microcellulose(MCC) and was reacted with maleic anliydride to obtain carboxyl-functionized nanocellulose(MA-NCCs). The presence of .OH and .SO3H on the surface of rod-like MA-NCC was confirmed by Fourier transfonn infrared spectrometry(FTIR). Sulfonated poly(aryl ether ether ketone ketone)(Ph-SPEEKK) was synthesized with bis(4-fluorophenyl-methanone) and 2-phenylhydroquinone as monomer. MA-NCC/Ph-SPEEKK nanocomposite membranes with different MA-NCCs content were prepared, and their properties were characterized. Compared with Ph-SPEEKK, MA-NCC/Ph-SPEEKK nanocomposite membrane showed better mechanical and thermal properties and higher proton conductivity. The proton conductivity of the composite membrane with 4%(mass fraction) MA-NCCs under 80℃ was 0.095 S/cm. And its tensile strength reached 30.3 MPa, which was 21.2% higher than that of Ph-SPEEKK pure polymer membrane. | YANG Xue WEI Yingcong CHU Xuefeng ZHAO Qi YAN Wenling DONG Chenjun LIU Baijun SUN Zhaoyan HU Wei ZHANG Niaona | 2019 | Chemical Research in Chinese Universities2019，35，4： | 0 |
| 3 | Hantzsch Ester Modified Asymmetric BODIPY Probe with Ultra-high Sensitivity for Ultra-fast Detection of Endogenous Hypochlorite in Living Cells显示文摘Hypochlorite(ClO^(-))is an important reactive oxygen species produced by the immune system to fight off invading pathogens,but its over-expression can interfere with normal physiological process and induce serious diseases.Although a variety of molecular probes have been reported for detecting ClO^(-),the development of advanced fluorescent tools with faster response and higher sensitivity to precisely monitor ClO^(-)remains a challenge.In this work,two Hantzsch ester(a derivative of 1,4-dihydropyridine)derived fluorescent probes MeDHP-BCl and MeDHP-PhBCl were constructed based on asymmetric BODIPY-matrix.These probes exhibit significant fluorescence turn-on in the ultra-sensitive(detection limit<1 nmol/L)and ultra-fast response(≤5 s)to ClO^(-).The reaction has been determined to be a highly selective N-chlorination of Hantzsch ester which cannot be activated by various common bioactive species,including nitric oxide(NO)that could oxidize Hantzsch ester under aerobic physiological conditions in most reports.MeDHP-PhBCl possessed a relatively longer fluorescence emission wavelength and higher quantum yield after activation,while more notably,MeDHP-BCl displayed lower cytotoxicity and more remarkable fluorescence increment in the response to ClO^(-),enabling selective and precise visualization of endogenous ClO^(-)over-expression in living RAW264.7 cells. | Tianli Zhu Mengting Zhao Rongcheng Wang Chenjun Dong Xuemei Dong Jie Sun Lixin Sun Chunchang Zhao | 2023 | Chinese Journal of Chemistry2023，41，23： | 0 |
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