Shanxi Research Institute of Applied Chemistry

Taiyuan, China

Shanxi Research Institute of Applied Chemistry

Taiyuan, China
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Li S.,Taiyuan University of Technology | Du X.,Taiyuan University of Technology | Hou C.,Shanxi Research Institute of Applied Chemistry | Hao X.,Taiyuan University of Technology | And 4 more authors.
Composites Science and Technology | Year: 2017

A facile approach has been developed to prepare perfluoroalkylsilane functionalized multi-walled carbon nanotubes (MWCNTs) with high grafting content through one-pot two-step reactions. In this process, hydroxyl derivatized MWCNTs (hydroxylized MWCNTs) were covalently functionalized with 3-aminopropyl triethoxysilane by silanisation reaction, and subsequently reacted with hexafluorobutyl acrylate or dodecafluoroheptyl acrylate by Micheal-addition reaction. SEM, FT-IR and TGA characterizations demonstrated that the perfluoroalkylsilane were covalently attached onto the surface of MWCNTs and the higher molecular weight of perfluoroalky acrylate yielded higher grafting content. The perfluoroalkylsilane functionalized MWCNTs showed improved dispersibility and strong interfacial adhesion in/with polyurethane matrix. An increase in the grafting content led to a decrease the crystallinity and hydrogen bonding in the PU composites. As a result, the composites showed increased elongation and unimproved tensile strength, but reduced storage modulus and loss factor. Meanwhile, the higher grafting content offered their composite with higher hydrophobicity, lower percolation threshold and more enhanced electronic conductivity. © 2017 Elsevier Ltd


Wu J.,Shanxi Research Institute of Applied Chemistry | Zhang R.,Shanxi Research Institute of Applied Chemistry | Zhang R.,Taiyuan University of Technology | Ma G.,Shanxi Research Institute of Applied Chemistry | And 3 more authors.
Journal of Applied Polymer Science | Year: 2017

A novel fluorinated oligomer with tertiary amine structure was synthesized by isophorone diisocyanate, 2-hydroxyethyl acrylate, and fluorinated diol, which was prepared via Michael addition reaction between diethanolamine and dodecafluoroheptyl acrylate. The structure of fluorinated oligomer was confirmed by FTIR. The prepared fluorinated oligomer was added into the UV curable coatings, the influences of fluorinated oligomer on the cured degree and double bond conversion was analyzed by FTIR and gel content. The conversion ratio is increased when the fluorinated oligomer increased, which is due to the tertiary amine structure in the prepared product. The characteristics of UV cured films such as thermal properties, hydrophobicity, chemical resistance, mechanical properties, and hardness were characterized with the TGA, contact angle, and DMA. Results show that thermal stability, hydrophobicity, and chemical resistance are improved when fluorinated oligomer is introduced into the UV curable coatings. The DMA and hardness results indicated that the mechanical properties of UV cured films were improved and the flexibility decreased. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44387. © 2016 Wiley Periodicals, Inc.


Qin S.,North University of China | Liu Y.,North University of China | Zhou Y.,North University of China | Zhou Y.,Shanxi Research Institute of Applied Chemistry | And 3 more authors.
Journal of Materials Science: Materials in Electronics | Year: 2017

Large scale CdS nanoparticles are synthesized by a facile and effective route. The as-prepared CdS product was characterized by X-ray diffraction, scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electronmicroscopy, photoluminescence spectroscopy, X-ray photoelectron spectroscopy and UV–Vis diffuse reflectance spectroscopy. The CdS nanoparticles showed higher photocatalytic activity for the discoloration of methyl orange under UV light irradiation for 90 min. Significantly, the stability and recycling of the photocatalyst was also investigated. This study may provide a new insight into the design and prepared of visible-light photocatalytic materials. © 2017 Springer Science+Business Media New York


Ji X.,Shanxi Research Institute of Applied Chemistry | Wang H.,Taiyuan University of Technology | Ma X.,Shanxi Research Institute of Applied Chemistry | Hou C.,Shanxi Research Institute of Applied Chemistry | Ma G.,Shanxi Research Institute of Applied Chemistry
RSC Advances | Year: 2017

Preparing PDMS-modified WPU has attracted the attention of many researchers for two decades and this modification strategy has been proved to be an effective and feasible way to improve some key properties of WPU. In this review, both physical and chemical modification are introduced in depth. For chemical modification, the types of PDMS used, the copolymerization methods, the sub-classification of PDMS-modified WPU, and the synthesis processes are categorized and reviewed respectively; the effects of PDMS on colloidal, film-forming, surface, mechanical, and thermal properties as well as the effects of PDMS on microphase separation and hydrogen bonding behaviors of WPU are discussed in detail, with focus on the introduction to and understanding of the "structure-morphology-property" relationship of these hybrid materials. Besides, a current strategy to combine the PDMS modification technique with other modification methods to obtain novel WPU materials with superior properties is introduced. Finally, the challenges and future perspectives of this field are discussed. © The Royal Society of Chemistry 2017.


Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Research Institute of Applied Chemistry | Xie J.,Taiyuan University of Technology | Ling L.,Taiyuan University of Technology | And 2 more authors.
Journal of Coatings Technology Research | Year: 2013

This paper describes surface modification of commercial nanosilica with 3-mercaptopropyl trimethoxysilane (MPTMS) and its effect on the properties of UV curable coatings. The mercapto groups were grafted onto nanosilica surface by a condensation of the surface Si-OH with the hydrolysized Si-OH of MPTMS. Fourier transform infrared spectroscopy, thermal gravimetric analysis, and particle size distribution were employed to characterize nanosilica and modified nanosilica. It was demonstrated that the mercapto groups were successfully grafted onto the nanosilica surface with the grafting ratio of 16.8% and the mercapto groups content of 0.9 mmol/g. The dispersion and self-aggregation of nanosilica in UV curable coatings were improved significantly. The photopolymerization kinetics of UV curable coatings, containing various amounts of nanosilica and modified nanosilica, were evaluated by the photo differential scanning calorimetry technique. This indicated that nanosilica both before and after modification decreased UV curing speed and ultimate percentage conversion; however, in comparison with the coatings containing unmodified nanosilica, the coatings containing modified nanosilica exhibited higher curing speeds and conversion ratios. It can be ascribed that the mercapto groups on the nanosilica surface reduced oxygen inhibition during the UV curing process via the thiol-ene click reaction. The mechanical properties of UV curable coatings were also compared. © 2013 American Coatings Association & Oil and Colour Chemists' Association.


Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Research Institute of Applied Chemistry | Zhang T.,Taiyuan University of Technology | Zhang T.,Shanxi Research Institute of Applied Chemistry | And 4 more authors.
Journal of Applied Polymer Science | Year: 2013

A Diels-Alder adduct of rosin with tung oil was effectively prepared for use as a filler and adhesion promoter in UV-curable adhesives. The characteristics of the adduct were analyzed by Fourier transform infrared (FTIR) spectroscopy and ultraviolet-visible (UV-vis) absorption spectra. The reaction mechanism was studied with gel permeation chromatography, thermogravimetric analysis, 1H-NMR, and the density functional theoretical method. The FTIR and 1H-NMR results showed that the Diels-Alder addition occurred between the rosin and tung oil. The still-existing characteristic peaks of the conjugated diene in the adduct, as shown in the FTIR and UV-vis absorption spectra, indicated that the most favorable reaction between the rosin and tung oil was when the rosin was used as the conjugated diene and the tung oil was used as the dienophile. The molecular weights of the adduct with different molar ratios showed that the most possible addition molar ratio between the rosin and tung oil was 3:1. The favorable addition mechanism was further proved by a comparison of the relative energies of different isomers of the adduct with theoretical calculation, and the most stable structure of adduct showed that the addition position of tung oil was the terminal C=C double bond. The properties analysis indicated that the adduct could improve the adhesion of UV-curable adhesives and reduce the curing shrinkage rate. Copyright © 2013 Wiley Periodicals, Inc.


Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Research Institute of Applied Chemistry | Ma G.,Shanxi Research Institute of Applied Chemistry | Li P.,Shanxi Research Institute of Applied Chemistry | And 2 more authors.
Journal of Coatings Technology Research | Year: 2014

In order to improve the dispersion of nanosilica and the mechanical properties of UV-curable coating, nanosilica was modified with acrylsilane-containing tertiary amine structure, which was synthesized by the Michael addition reaction between 3-aminopropyl triethoxysilane and tripropylene glycol diacrylate. The prepared acrylsilane was characterized by 1H NMR, 13C NMR, and FTIR. The modified nanosilica was characterized by FTIR, TGA, and SEM. The TGA analysis showed that the grafting percentage of acrylsilane based on nanosilica was 72.4 wt%. The SEM results showed that the agglomeration of nanosilica was reduced and the dispersion was improved due to the acrylsilane modification. The viscosities of UV-curable coatings with modified nanosilica were determined and it was found that the viscosities of the coatings decreased in comparison with the viscosities of coatings with unmodified nanosilica. The photo-DSC results indicated that both nanosilica and modified nanosilica also decreased the UV-curing speed and final percentage conversion, while the conversion of the coatings containing modified nanosilica was faster than that with unmodified nanosilica owing to the tertiary amine structure and acrylate structure on the surface of the modified nanosilica. © 2014 American Coatings Association & Oil and Colour Chemists' Association.


Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Research Institute of Applied Chemistry | Ling L.,Taiyuan University of Technology | Xie J.,Taiyuan University of Technology | And 2 more authors.
Chemical Physics Letters | Year: 2014

Surface modification of nanosilica with 3-mercaptopropyl trimethoxysilane (MPTMS) has been investigated. FTIR, TGA, CA, 29Si NMR and DFT method have been applied to study the interaction between nanosilica and MPTMS. The results show that the organic functional groups are successfully grafted onto the nanosilica surface and the grafting ratio firstly increases and then decreases with the increasing MPTMS. In addition, four different grafting modes between nanosilica surface and MPTMS have been studied by DFT method. It indicated that the favorable grafting structures are mono-, di-grafting mode when the MPTMS is lower and ladder-like grafting mode when the MPTMS is higher. © 2013 Elsevier B.V. All rights reserved.


Wu J.,Taiyuan University of Technology | Wu J.,Shanxi Research Institute of Applied Chemistry | Ma G.,Shanxi Research Institute of Applied Chemistry | Li P.,Shanxi Research Institute of Applied Chemistry | And 2 more authors.
Journal of Applied Polymer Science | Year: 2014

The multifunctional thiol- and acrylate-terminated polyurethane (PU) has been successfully prepared for using as the main resin in the UV curable coatings. The structure and molecule weight of prepared PUs were analyzed by fourier transformed infrared spectroscopy (FTIR) and gel permeation chromatography, respectively. The results showed that the different terminal multifunctional groups have been grafted onto the PU and their difference in molecule weight was significant. Used as the main resin in coatings, the curing kinetic and percentage conversion of the different UV curing coatings system were investigated by real-time FTIR method, and the effects of terminal functional groups and photoinitiator on the final conversion percentage and conversion rate were also compared. It is observed that the thiol-terminated PU had higher conversion speed and final conversion percentage due to the remarkable effect of mercapto groups on reducing oxygen inhibition during UV curing process. The shrinkage, viscosity, and adhesion of UV curable coatings with thiol- and acrylate-terminated PUs were also investigated and compared, and the results indicated that the former exhibited lower shrinkage and higher adhesion performances than the latter, along with the lower viscosity. © 2014 Wiley Periodicals, Inc.


Ji X.,Shanxi Research Institute of Applied Chemistry | Zhang X.,Texas Tech University | Zhang X.,Hefei University of Technology
Journal of Nanomaterials | Year: 2015

In recent years, three-dimensional (3D) graphene-based nanomaterials have been demonstrated to be efficient and promising electrocatalysts for oxygen reduction reaction (ORR) in fuel cells application. This review summarizes and categorizes the recent progress on the preparation and performance of these novel materials as ORR catalysts, including heteroatom-doped 3D graphene network, metal-free 3D graphene-based nanocomposites, nonprecious metal-containing 3D graphene-based nanocomposites, and precious metal-containing 3D graphene-based nanocomposites. The challenges and future perspective of this field are also discussed. © 2015 Xuan Ji et al.

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