Synthesis and characterization of a highly absorptive resin using glow discharge electrolysis plasma

Jie Ren,Ruirui Liao,Jinzhang Gao,Yan Li,Wu Yang

doi:10.1186/2228-5547-4-22

Abstract

Abstract Background A highly absorptive resin poly(butyl acrylate-co-styrene) was synthesized by the method of emulsion polymerization and initiated using glow discharge electrolysis plasma. The effects of the synthesis conditions were examined and discussed in detail. The synthesized resin was characterized by attenuated total reflectance Fourier transform infrared spectroscopy, scanning electron microscopy, and thermogravimetric analysis. Results The results showed that the optimal conditions were as follows: discharge voltage 580 V, discharge time 11 min, polymerization temperature 90°C, ratio of water/monomer 4.0, and 3% of N,N-methylenebis(acrylamide). Conclusion Under the optimal conditions, the oil absorbency was 97 g/g for chloroform and 56 g/g for xylene. In addition, the kinetics of absorption for oil was investigated, and the results indicated that the absorption process seems to obey more the first-order rate model.

Highlights

Premature deterioration of concrete structures mainly occurs due to the ingress of chloride ions and carbon dioxide [1]
Some authors argue that those compounds which are used to protect concrete reinforcement are not effective [10] when the concrete is kept immersed in NaCl solution, whereas others report that some compounds are effective in reducing corrosion rate of steel rebar in concrete contaminated with chlorides [22, 23]
It is understandable from the polarization data that at very low concentration (50 ppm), sodium nitrite acted as a corrosion antagonist, i.e., the corrosion rate of steel rebar treated with nitrite was greater than that of the rebar immersed in concrete pore solution (CPS) without nitrite

Summary

Introduction

Premature deterioration of concrete structures mainly occurs due to the ingress of chloride ions and carbon dioxide [1]. Some authors argue that those compounds which are used to protect concrete reinforcement are not effective [10] when the concrete is kept immersed in NaCl solution, whereas others report that some compounds are effective in reducing corrosion rate of steel rebar in concrete contaminated with chlorides [22, 23]. The present investigation aims to explain the behaviour of these chemical species on steel rebar in contaminated concrete pore solution. Chemicals such as trisodium citrate (98%), sodium chloride (> 99.9%), NaNO2 (EMSURE®) and zinc acetate (> 99%) were purchased from Merck Millipore. To investigate the surface morphological changes on the steel rod dipped in simulated concrete pore solution [46, 47], microscopic studies were performed using Leica Stereo Microscope (S8ACO)

Results and discussion

NaNO2 50ppm

Conclusions