Bo Wang

Name:

Organization: Zhengzhou University

Department: College of Materials Science and Engineering, National Engineering Research Center for Advanced Polymer Processing Technology

Title:

TOPICS

Material Chemistry

Carbon Nanotubes

Polymer

UV Absorbents

Chemicals
References

Hydrophobic polycarbonate monolith with mesoporous nest-like structure: an effective oil sorbent

Co-reporter:Bo Wang, Weiwei Chen, Lutong Zhang, Zhenzhen Li, Chuntai Liu, Jingbo Chen, Changyu Shen

Materials Letters 2017 Volume 188() pp:201-204

Publication Date(Web):1 February 2017

DOI:10.1016/j.matlet.2016.11.015

•PC monolith with three-dimensional interconnected mesoporous nest-like structure was first fabricated.•Excellent hydrophobicity was ascribed to continuously interlaced nanofibrous skeleton and mesoporous structure.•The monolith exhibited effective adsorption of various types of oils.Polycarbonate (PC) monolith with three-dimensional interconnected mesoporous nest-like structure was first fabricated by thermally impacted nonsolvent-induced phase separation (TINIPS) method. Owing to continuously interlaced nanofibrous skeleton, the monolith possessed a high specific surface area of 95.02 m2/g. This novel structure also contributed to the improvement of hydrophobicity so that a high water contact angle of 143.9° was obtained. Furthermore, the as-prepared monolith could effectively adsorb various types of oils. Based on such a unique structure as well as these outstanding properties, the PC monolith will play a big role in the field of oil sorbents.

Effects of surface modification with 3-aminopropyltriethoxysilane on structure and mechanical property of multiwalled carbon nanotube/polycarbonate composites

Co-reporter:Yuanxu Zhao;Weiwei Chen;An Li;Guoqiang Zheng;Chuntai Liu;Jingbo Chen ;Changyu Shen

Polymer Composites 2016 Volume 37( Issue 6) pp:1914-1923

Publication Date(Web):

DOI:10.1002/pc.23370

Hydroxyl functionalized multiwalled carbon nanotubes (H-MWNTs) were silanized using 3-aminopropyltriethoxysilane (APTES) in order to improve the dispersion and interfacial interaction in composites. MWNT/polycarbonate (PC) composites filled with H-MWNTs and silanized MWNTs (S-MWNTs) were fabricated by melt mixing and injection molding. Fourier transform infrared spectrometry (FTIR) and energy dispersion X-ray spectroscopy (EDS) were employed to prove the presence of APTES on the surface of S-MWNTs. In addition, thermogravimetric analysis (TGA) was used to evaluate the relative amount of introduced APTES. The microstructure and mechanical property of both composites were investigated by scanning electron microscopy (SEM), transmission electron microscope (TEM), tensile test and dynamic mechanical analysis (DMA). The SEM and TEM images showed that S-MWNT/PC composites had better dispersion and interfacial adhesion than H-MWNT/PC composites. A reinforcing and toughening effect on tensile behavior of composites was obtained after silane functionalization. The storage modulus of composites increased markedly as a function of MWNTs content, especially for the composites with S-MWNTs. In summary, the silanization can improve the dispersion of MWNTs and the interfacial adhesion between MWNTs and PC so as to enhance the mechanical properties of composites. POLYM. COMPOS., 37:1914–1923, 2016. © 2015 Society of Plastics Engineers

Thermal degradation mechanism and kinetics of polycarbonate/silica nanocomposites

Co-reporter:Yuezhan Feng, Bo Wang, Fangfang Wang, Yuanxu Zhao, Chuntai Liu, Jingbo Chen, Changyu Shen

Polymer Degradation and Stability 2014 Volume 107() pp:129-138

Publication Date(Web):September 2014

DOI:10.1016/j.polymdegradstab.2014.05.012

Polycarbonate nanocomposites filled with pristine and modified silica were prepared by simple melt compounding. The thermal degradation behavior of composites was investigated by thermogravimetric analysis coupled with differential scanning calorimetry (TGA/DSC). To understand the thermal degradation mechanism, the chemical structures of gaseous and solid degradation products were detected by thermogravimetric analysis coupled with Fourier transform infrared spectrometry (TGA/FTIR) and X-ray photoelectron spectroscopy (XPS), respectively. Kissinger–Akahira–Sunose (KAS) and Flynn–Wall–Ozawa (FWO) methods were employed to analyze the thermal degradation kinetics. High thermal degradation temperature was obtained by incorporating both types of nanoparticles into matrix, but the maximum mass loss rate increased. According to the DSC curves for degradation process, the change of the number and position of absorption peaks meant that the degradation mechanism of composites was different from that of neat PC. The analysis for TGA chars confirmed the presence of alcoholysis reaction between PC and silica nanoparticles during the thermal decomposition. TGA/FTIR results proved that no new degradation volatiles were produced during the thermal degradation of composites, but the total amounts of all gaseous products decreased by adding silica nanoparticles. The degradation activation energies of both composites increased significantly relative to neat PC, especially for the composite with modified silica.