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- 저자 : Ruimin Ma (검색결과 3 건)
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Effect of Acrylic Content on the Properties of the Polyurethane/Polyacrylate Composite Emulsion
Guoyan Ma,Yiding Shen,Ruimin Gao,Xiaorong Wang 한국고분자학회 2017 폴리머 Vol.41 No.1
A polyurethane/polyacrylate (PUA) composite emulsion was synthesized by using polyurethane (PU) as seeds with soap-free emulsion polymerization, in which methyl methacrylate (MMA) and butyl acrylate (BA) were used as main acrylic monomers. The effect of acrylic contents and “stiff” and “soft” weight ratio of acrylic monomers on the properties of the films were investigated. The Fourier transform infrared (FTIR) results showed that acrylic monomers were involved in the emulsion copolymerization. The optimum composition of PUA composite formation was obtained when the polyacrylate (PA) content was 20%, in which the weight ratio of MMA and BA was 2/1. With the increment of PA content, the decomposition temperature increased.
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Shuangchen Ma,Fang Xu,Dao Qiu,Xiangyang Chen,Ruimin Wang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
Selenium is a harmful trace element emitted during the combustion process of coal-fired power plants. Most of the selenium is enriched in the downstream wet flue gas desulfurization system (WFGD). Thisstudy found that S2O28 is the most important factor affecting the oxidation of selenite. In the processof simulating slurry oxidation of selenite to selenate, the presence of S2O28 can increase the oxidationrate of selenate from about 50% to about 80%. At the same time, this study also considered the influenceof selenium concentration, initial pH, SO2 concentration and temperature etc. on the transformation ofselenium species. It was believed that the application of ORP to the indication of selenite oxidation statusneeds further demonstration. Energy Dispersive X-Ray Spectroscopy (EDX) and X-ray photoelectron spectroscopy(XPS) were used to confirm the migration of selenium in the desulfurization slurry to gypsum. Inaddition, DFT calculation was performed to obtain theoretical parameters for the adsorption of seleniteand selenate by gypsum. The results of this study are helpful to understand the transformation andmigration of selenium in the desulfurization system, which provide theoretical support for the realizationof selenium in-situ control.
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Influence of Real-Information to Change Tourists' Travel Route
Qingyun Chen,Ruimin Ma,Maozhu Jin,Peiyu Ren 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.11
The tourism system as a whole is becoming less sustainable, both because of its overall rapid growth and the unwillingness to change travel behavior (tourists). In the field of the tourism, the tourists' activities have influences on the protection and development of the natural scenic. In order to understand the tourist' intention to change travel route based on real-time information, this paper adds trust to the model of theory of planned behavior (TPB). Exploratory and confirmatory factor analysis are used to identify and confirm the constructs. In addition, structural equation modeling was established to test the measure model. Results indicate that the attitude, subjective norm and perceived behavioral control have positive effect on the behavioral intention of changing travel route according to real-time information. Moreover, trust also has positive influence on behavioral intention via three antecedents of intention. The findings have implications for predicting the tourist's intention of travel route change.
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