TY - JOUR
T1 - Synthesis and characterization of a dual-cation organomontmorillonite nanocomposite
AU - Wang, Guifang
AU - Xiao, Huizhen
AU - Zhang, Shuai
AU - Qiu, Jun
AU - Li, Hengjun
AU - Yang, Meijin
AU - Ma, Shaojian
AU - Komarneni, Sridhar
N1 - Funding Information:
Funding: The research was funded by the National Natural Science Foundation of China (No. 51464004, No. 51764003, No. 51774200), the Cooperation Foundation of Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials (No. GXYSSF1806), Innovation Project of Guangxi Graduate Education (YCSW2018052) and the college of Agricultural Sciences under Station Research Project No. PEN04566.
Publisher Copyright:
© 2018 by the authors.
PY - 2018/11/19
Y1 - 2018/11/19
N2 - In this study, a novel dual-cation organomontmorillonites (OMt) nanocomposite was synthesized by two kinds of modifiers cetyltrimethylammonium chloride and cysteamine hydrochloride, and the adsorption behavior of modifiers into montmorillonite (Mt) has been investigated. The OMt were characterized by techniques, such as X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, and thermogravimetric and differential thermal (TG-DTA) analyses. The effects of temperature, contact time, the order of addition and the concentration of organic modifiers on the amounts of organics adsorbed were investigated. The adsorption amount of cetyltrimethylammonium chloride (CTAC) and cysteamine hydrochloride (CSH) increased with the increase of the added CTAC amount and contact time, while the addition order of modifiers and modification temperature had no significant effect on the actual adsorption amount of CTAC and CSH on Mt, as confirmed by the XRD patterns. The experimentally determined isotherms showed a good fit with the Langmuir adsorption models. The adsorption kinetics demonstrated that the adsorption of CTAC and CSH by Mt followed the pseudo-second-order model, and CTAC adsorption rate onMt was faster than that of CSH. FTIR spectrum clearly revealed the incorporation of surfactant ions into the interlayer region. The TG-DTA analyses showed that the total mass losses of OMt strongly depended on the molecular volume of modifiers.
AB - In this study, a novel dual-cation organomontmorillonites (OMt) nanocomposite was synthesized by two kinds of modifiers cetyltrimethylammonium chloride and cysteamine hydrochloride, and the adsorption behavior of modifiers into montmorillonite (Mt) has been investigated. The OMt were characterized by techniques, such as X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, and thermogravimetric and differential thermal (TG-DTA) analyses. The effects of temperature, contact time, the order of addition and the concentration of organic modifiers on the amounts of organics adsorbed were investigated. The adsorption amount of cetyltrimethylammonium chloride (CTAC) and cysteamine hydrochloride (CSH) increased with the increase of the added CTAC amount and contact time, while the addition order of modifiers and modification temperature had no significant effect on the actual adsorption amount of CTAC and CSH on Mt, as confirmed by the XRD patterns. The experimentally determined isotherms showed a good fit with the Langmuir adsorption models. The adsorption kinetics demonstrated that the adsorption of CTAC and CSH by Mt followed the pseudo-second-order model, and CTAC adsorption rate onMt was faster than that of CSH. FTIR spectrum clearly revealed the incorporation of surfactant ions into the interlayer region. The TG-DTA analyses showed that the total mass losses of OMt strongly depended on the molecular volume of modifiers.
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U2 - 10.3390/ma11112320
DO - 10.3390/ma11112320
M3 - Article
C2 - 30463201
AN - SCOPUS:85056761287
VL - 11
JO - Materials
JF - Materials
SN - 1996-1944
IS - 11
M1 - 2320
ER -