Ping Gao

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Name: 高平; Ping Gao

Organization: Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences

Department: State Key Laboratory of Solid Lubrication

Title: Associate Researcher/Professor

Chemicals
References

Pd/TiN nanocomposite catalysts for selective hydrogenation of phenol and its derivatives

Co-reporter:Hai-Feng Li, Qin-Sheng Zhang, Zeng-Bo Pang, Mi Tian, Ping Gao, Lai-Lai Wang

Chinese Chemical Letters 2016 Volume 27(Issue 9) pp:1500-1504

Publication Date(Web):September 2016

DOI:10.1016/j.cclet.2016.03.036

Pd/TiN nanocomposite catalysts were fabricated for one-step selective hydrogenation of phenol to cyclohexanone successfully. High conversion of phenol (99%) and selectivity of cyclohexanone (98%) were obtained at 30 °C and 0.2 MPa H2 for 12 h in the mixed solvents of H2O and CH2Cl2. The Pd nanoparticles were stable in the reaction, and no aggregation was detected after four successive runs. The catalytic activity and selectivity depended on slightly the Pd particle sizes. The generality of the catalysts for this reaction was demonstrated by the selective hydrogenation of phenol derivatives, which showed that the catalyst was selective for the formation of cyclohexanone.Pd/TiN nanocomposite catalysts were fabricated by the chemical reduction with different Pd contents (1.3–8.5 wt%) and successfully used for the one-step selective hydrogenation of phenol and its derivatives.

Characterizing a lubricant additive for 1,3,4-tri-(2-octyldodecyl) cyclopentane: Computational study and experimental verification

Co-reporter:Jingyan Nian;Yifan Si;Zhiguang Guo;Weimin Liu

Friction 2016 Volume 4( Issue 3) pp:257-265

Publication Date(Web):2016 September

DOI:10.1007/s40544-016-0124-8

In order to increase the life of spacecraft, it is important to improve the comprehensive lubrication performance. Multiple alkylated cyclopentane (MAC) lubricants are presently gaining wide acceptance for actual space applications; adding extreme pressure additive is a strategy to improve lubrication performance. In this study, taking 1,3,4-tri-(2-octyldodecyl) cyclopentane as base oil, tricresol phosphate (traditional additive) and tri-(2-octyldodecyl) phosphate (developmental additive) have been screened computationally for compatibility, shear film forming and energy dissipation. Theoretical results indicate that (a) tricresol phosphate additive is not suited for addition to 1,3,4-tri-(2-octyldodecyl) cyclopentane lubricant due to limited compatibility; (b) tri-(2-octyldodecyl) phosphate is an excellent lubricant additive due to its perfect compatibility, ease of forming a shear film on the surface of friction pairs, higher strength, and low energy dissipation; and (c) lubrication occurs through the solid-liquid composite lubrication mechanism. These theoretical results were confirmed experimentally.

Preparation and characterization of graft copolymer from dealkaline lignin and styrene

Co-reporter:Haifeng Li;Qinsheng Zhang;Lailai Wang

Journal of Applied Polymer Science 2015 Volume 132( Issue 17) pp:

Publication Date(Web):

DOI:10.1002/app.41900

ABSTRACT

Graft copolymerization of styrene onto dealkaline lignin by ferrous chloride and hydrogen peroxide coinitiator has been achieved successfully. The influence of temperature and reaction time as well as the amount of the styrene monomer, initiator, and catalyst on the grafting copolymerization was investigated. The optimum reaction conditions were determined as follows: c (styrene) = 20.00 mmol, c (H₂O₂) = 5.00 mmol, c (FeCl₂) = 0.10 mmol, T = 30°C and t = 48 h. The optimum yield (Y), total conversion (TC), grafting efficiency (GE), and degree grafted (DG) values were 96.6, 96.3, 59.5, and 53.7%, respectively. The copolymer of lignin grafted PS was separated and characterized by elemental analysis, differential scanning calorimetry, Fourier transform infrared, thermogravimetry analysis, field emission-scanning electron microscopy, gel permeation chromatography, and nuclear magnetic resonance. It was demonstrated that the solubility what the copolymer exhibited turned out to be the very reverse of the original lignin. The surface properties and structure of lignin were completely changed after grafting copolymerization. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41900.

Cyclopentane,1,2,4-tris(2-octyldodecyl)-

CAS:129725-38-8

Cyclopentane,1,2,4-tris(2-octyldodecyl)-

CAS:22393-88-0

9-Octadecenoic acid(9Z)-, eicosyl ester

Palladate(2-),tetrachloro-, hydrogen (1:2), (SP-4-1)-

CAS:16970-55-1

Palladate(2-),tetrachloro-, hydrogen (1:2), (SP-4-1)-

CAS:12385-13-6

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