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Zhu Sining,Wan Haitao,Yan Zhibo,Xi Chen,Zhang Yuzhuo,Zhang Fan 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.9
With the continuous development of the concept of green chemistry, more attention is being paid to the selective capture of copper (II) from wastewater and its recovery and reuse. Ion imprinting technology is widely used to remove heavy metals from aqueous solutions due to its high selectivity. In this work, Cu(II) imprinted polymer (Cu(II)-IIP) was prepared by stepwise polymerization using Cu(II) ions as the template ions, PEG-600 as a pore-forming agent, epoxy resin as the carrier, and polyethylene polyamine as curing agent and complexing agent. The influences of solution pH, reaction temperature, reaction time and initial solubility of metal ions on its adsorption ability were systematically examined. The studies showed that the maximum adsorption quantity was 91.58 mg/g when pH=5 and T=318 K. The adsorption for Cu(II) of the Cu(II)-IIP was considered to be the monolayer chemisorption and spontaneous endothermic process. In the presence of multiple coexisting ions, Cu(II)-IIP had high selectivity for Cu(II). After five adsorption-desorption cycles, high removal rate could still be obtained, which means that the material provides a feasible method for treating wastewater containing Cu(II) ions.
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Tribological Properties of PAO40@SiO2/UHMWPE Composites Subjected to Heavy-loading Conditions
Yao Chenyu,Jia Dan,Wan Changxin,Li Jian,Zhan Shengpeng,Yang Tian,Qi Xiaowen,Liu Changxin,Duan Haitao 한국고분자학회 2022 폴리머 Vol.46 No.5
In the present study, the ballistic impact resistance of kevlar reinforced polymer composites and shape memoryalloy sheet reinforced kevlar epoxy polymer composites have been compared numerically and experimentally. The testspecimens have been fabricated by the hand layup method, and the ballistic impact test has been conducted accordingto NIJ Level IIIA. In the current research, a new method has been proposed to measure the ballistic impact resistanceof the material by using Image J software. From the test results, it has been observed that reinforcement of shape memoryalloy in kevlar epoxy polymer composites has increased the ballistic impact resistance by 89-145% for the damaged areacompared with plain kevlar reinforced epoxy polymer composite. Also, the damaged area observed in the numerical andthe experimental results is almost the same.
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