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Zhang W.,East China University of Science and Technology | Zhang Y.,East China University of Science and Technology | Fang S.,East China University of Science and Technology | Luo X.,Key Scientific Research Base of Museum Environment | And 3 more authors.
Journal of Applied Polymer Science | Year: 2016

In this work, acrylate copolymer has been fabricated by graft copolymerization of acrylate monomer (EMA:EA is 70:30) with functional TiO2 nanoparticles, which was surface-modified by the silane coupling agent methacryloxy propyl trimethoxyl silane (KH570) to attach active ends. The structure and properties of the copolymer were characterized by FT-IR, FE-SEM, differential scanning calorimetry, thermogravimetric analysis, ultraviolet-visible spectra, and discoloration. Characterization revealed that functional TiO2 particles were grafted onto the chain of the acrylate copolymer and the acrylate copolymer showed excellent photo-oxidative stability and transparency. The acrylate copolymer was applied to protect and consolidate ancient ivory by surface coating without destruction of chemical structure. © 2016 Wiley Periodicals, Inc. Source


Fang L.-J.,East China University of Science and Technology | Yan Y.,East China University of Science and Technology | Zhou H.,Key Scientific Research Base of Museum Environment | Wu L.-M.,Key Scientific Research Base of Museum Environment | And 2 more authors.
Huadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology | Year: 2015

The atmospheric corrosion behavior and law of bronze simulation materials exposed to museum simulation showcase were in situ monitored by quartz crystal microbalance (QCM). The corrosion products formed on surface of bronze simulation materials after 60 d were investigated by means of scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). The results showed that adding light, increasing humidity and temperature accelerated the corrosion of bronze. The most serious corrosion of quartz crystal was achieved when exposed to ERCO LED 4000 K. After exposed to different lights for 60 d, the main corrosion products were Cu2O, CuO, SnO, SnO2 and the secondary corrosion products were copper carbonate, copper sulfate and copper sulfide, copper nitrate, copper nitrite and copper chloride. ©, YYYY, East China University of Science and Technology. All right reserved. Source


Yan Y.,East China University of Science and Technology | Zhang T.,East China University of Science and Technology | Zhou H.,Key Scientific Research Base of Museum Environment | Wu L.-m.,Key Scientific Research Base of Museum Environment | And 3 more authors.
Corrosion and Protection | Year: 2012

The corrosion behavior and mechanism of copper exposed to ozone at initial stage were investigated by using a quartz crystal microbalance (QCM). Through monitoring the frequency changes of copper-electrodeposited quartz crystal at different ozone concentrations and different temperatures, the corrosion kinetic curves were obtained. According to these curves, the corrosion rate and other related parameters were calculated and the corrosion mechanism involved was put forward. The results showed that, under specified corrosion conditions, the frequency change of the copper-electrodeposited quartz crystal decreased with the time. This indicated that the copper on the quartz crystal surface reacted with the corrosion medium to form corrosion products, which led to an increase of the surface mass of the quartz crystal and a decrease in the frequency. Ozone concentration and temperature can exercise an influence on the corrosion behavior of copper in various degrees. With the increase of ozone concentration and reaction temperature, the corrosion rate of copper gradually increased. Source


Yao J.,East China University of Science and Technology | Yan Y.,East China University of Science and Technology | Cai L.-K.,East China University of Science and Technology | Zhou H.,Key Scientific Research Base of Museum Environment | And 2 more authors.
Huadong Ligong Daxue Xuebao/Journal of East China University of Science and Technology | Year: 2015

The corrosion of AISI E52100 steel in 1-ethyl-3-methylimidazolium tetrafluoroborate ([emim]BF4) ionic liquid at different conditions were studied. Electrochemical tests (open-circuit potential, electrochemical impedance spectroscopy and potentiodynamic polarization curves) were performed to characterize the corrosion resistance of the steel samples in [emim]BF4 ionic liquid. Their morphology and chemical composition after corrosion were investigated using SEM coupled with EDX microanalysis and X-ray diffraction. Results showed that E52100 steel could be corroded in [emim]BF4, and the presence of oxygen, the increasing of temperature and water content could accelerate the corrosion. The water content had the most significant influence. The main corrosion products were iron fluoride and oxide. ©, 2015, East China University of Science and Technology. All right reserved. Source


Xiu G.,East China University of Science and Technology | Wu X.,East China University of Science and Technology | Wang L.,East China University of Science and Technology | Wang F.,East China University of Science and Technology | And 6 more authors.
Indoor Air 2014 - 13th International Conference on Indoor Air Quality and Climate | Year: 2014

Particles have become an important factor in environmental quality of heritage preservation. Aiming to explore the air quality of the museum, this study conducted a series experiment in a museum in Shanghai, China. The result showed that the mass concentrations indoors of coarse particles, fine particles and ultrafine particles were about 20.50∼24.38μg/m, 23.39∼24.08μg/m and 16.02∼17.48μg/m, respectively. Over 97 % of particles were belonged to PM1 (diameter <1μm) and nearly 80 % were PM0.3 (diameter <0.3 μm). It was also found that cleaning and walking activities can greatly elevate the coarse particle concentration to about 8∼172 times greater. In addition, chemical constituents have been investigated in this study as well. SO4 2-, NO3-, NH4+ peaked at the particle size ranged from 0.32 to 0.56μm; Na+, Cldistributed uniformly; K+ appeared bi-modals with peaks in the size ranges of 0.32∼0.56μm and 3.2∼5.6μm, respectively. Mg+ concentrated in size range of 3.2∼5.6μm, and Ca+ in the particles with size range of 1.8∼3.2μm. Total organic acids distributed uniformly, acetate ion mass concentration was 1.238μg/m which was higher than formate ion and oxalate ion. Source

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