China Research Institute of Daily Chemical Industry

Taiyuan, China

China Research Institute of Daily Chemical Industry

Taiyuan, China
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Cheng N.,Shandong University | Yu P.,China Research Institute of Daily Chemical Industry | Wang T.,China Institute of Technology | Sheng X.,Shandong University | And 3 more authors.
Journal of Physical Chemistry B | Year: 2014

Halogen-free and low-cost alkylcarboxylate-based anionic surface active ionic liquids (SAILs), namely, 1-butyl-3-methylimidazolium alkylcarboxylates ([C4mim][CnH2n-1O2], n = 8, 10, 12), were first synthesized through the neutralization of imidazolium hydroxide by alkylcarboxylic acids. A systematic study of their self-aggregation behavior in water was investigated by surface tension, electrical conductivity, steady-state fluorescence quenching, and 1H NMR. The micellar properties of this series of SAILs in ethylammonium nitrate (EAN) were also studied by surface tensiometry for comparison. A set of surface active parameters and thermodynamic parameters of these compounds in water and EAN was obtained. Surface tension results show that the surface activity of [C4mim][CnH 2n-1O2] in EAN is inferior to that in water. They exhibit a higher ability to aggregate in water than the traditional anionic surfactants, sodium alkylcarboxylates (SAC), and anionic SAILs, 1-butyl-3-methylimidazolium alkylsulfates ([C4mim][CnH2n+1SO4]) with the same hydrocarbon chain length. This demonstrates that the incorporation of carboxylate group and [C4mim]+ cation favors micelle formation. To understand the discrepancy in the surface activity of alkylsulfate- and alkylcarboxylate-based SAILs, theoretical calculations were performed to give electrostatic potential of the corresponding anions. The higher surface activity of [C4mim][C12H23O 2] mainly originates from the lower electronegativity of its anion. Density functional theory (DFT) calculations manifest that the interaction energy of binary combination SAILs-EAN is larger than that of SAILs-H 2O, implying the stronger interaction of the former. Consequently, it is more difficult for [C4mim][CnH2n-1O 2] to self-aggregate in EAN than in H2O. This work is expected to be of practical value for the environmentally friendly alkylcarboxylate-based SAILs in some potential applications, including nanomaterials synthesis and phase separation, among others. © 2014 American Chemical Society.


Wang G.,China Research Institute of Daily Chemical Industry | Qu W.,Shanxi Datong University | Du Z.,China Research Institute of Daily Chemical Industry | Cao Q.,Nanchang University | Li Q.,China Research Institute of Daily Chemical Industry
Journal of Physical Chemistry B | Year: 2011

Three novel amphiphilic dicephalic (double-headed) surfactants containing oligo(ethylene-oxide)methyl-ether and a sugar moiety TGA-m (m = 1, 2, and 3) that incorporate a tetrasiloxane at the terminus of a hydrocarbon chain were designed and synthesized. Their surface activity and aggregation behavior in aqueous solution were systematically investigated by surface tension, dynamic light scattering (DLS), and transmission electron microscopy (TEM) techniques at 298 K. The surface tension measurements provided the critical aggregation concentration (CAC) and the surface tension at the CAC (γcac). In addition, with application of the Gibbs adsorption isotherm, the maximum surface excess concentration (τmax) and the minimum surface area/molecule (Amin) at the air-water interface were estimated. The effect of EO chain length on the surface activity and aggregation behavior was also investigated. It was found that both the γcac and the CAC were lower than those for reported traditional hydrocarbon surfactants. Aggregates of three surfactants, TGA-m (m = 1, 2, and 3), formed in aqueous solutions could be assigned as spherical vesicles as suggested by analysis using DLS and TEM. Moreover the formation of vesicles can be confirmed by the encapsulation of bromophenol blue. These results indicate that these three surfactants have excellent efficiencies of vesicle formation and surface tension reduction in the aqueous phase. © 2011 American Chemical Society.


Wang G.,China Research Institute of Daily Chemical Industry | Qu W.,Shanxi Datong University | Du Z.,China Research Institute of Daily Chemical Industry | Du Z.,Shanxi University | And 2 more authors.
Journal of Physical Chemistry B | Year: 2013

Adsorption and aggregation behaviors of novel tetrasiloxane-tailed gemini surfactants N,N′-ditetrasiloxane-N,N′-digluconamide oligo ethylene glycol diglycidyl (Si-m-Si, where m is the number of ethylene glycol of 1, 2, and 3) were investigasted using surface tension, bromophenol blue encapsulation, dynamic light scattering (DLS), and transmission electron microscope (TEM) methods. The static surface tension of the aqueous Si-m-Si solutions measured at the critical aggregate concentration (CAC) was observed to be lower than that of traditional hydrocarbon gemini surfactants. This suggests that these newly synthesized gemini surfactants are capable of forming a closely packed monolayer film at the air/aqueous solution interface. With a combination of DLS data, TEM measurements, and bromophenol blue entrapment studies, formations of vesicles in Si-m-Si solutions appear to occur at a concentration well above the CAC. Moreover, the size of vesicles depended on their m values. © 2013 American Chemical Society.


Jiang Y.,China Research Institute of Daily Chemical Industry | Geng T.,China Research Institute of Daily Chemical Industry | Li Q.,China Research Institute of Daily Chemical Industry
Journal of Surfactants and Detergents | Year: 2012

The preparations of quaternary ammonium compounds from various tertiary amines and the (environmentally friendly) alkylation agent dimethyl carbonate were carried out. The effects of reaction temperature, reaction time, material mol ratio and solvent dosage on quaternization were examined, and the optimum reaction conditions were determined. Under the optimum conditions, the conversions of mono-alkyl tertiary amines could attain over 99%, while the conversions of di-alkyl tertiary amines reached over 95%. Moreover, a series of quaternary ammonium salts with new counterions (HCO 3, CH 3COO, CH 3CH 2COO, CH 3CH(OH)COO) were synthesized by the hydrolysis of methyl carbonate quaternary ammonium salts or by ion exchange reaction of methyl carbonate quaternary ammonium salts with corresponding acids. © AOCS 2011.


Li Y.,China Research Institute of Daily Chemical Industry
Shiyou Huagong/Petrochemical Technology | Year: 2015

2-Hexyl-1-decanol(2HD) was synthesized from 1-octanol through the Guerbet reaction over CuO-NiO as dehydrogenating-hydrogenating catalyst and KOH as base catalyst. The effects of catalyst supports, CuO-NiO loading and n(CuO):n(NiO) on the synthesis were investigated. The effect of the addition of a third metallic oxide to the CuO-NiO catalyst on the reaction was also studied. All the catalysts were characterized by means of TEM, XRD and BET. The addition of ZnO or MgO as the third component could improve the 1-octanol conversion but reduce the 2HD yield. The CuO-NiO catalyst with the highest activity could be prepared under the conditions of CaCO3 as support, CuO-NiO loading 30%(w) and n(CuO):n(NiO) 1:2. Under the optimized reaction conditions of 230℃, 1 h and using the above CuO-NiO catalyst in the presence of KOH, the 1-octanol conversion and 2HD yield reached 84.8% and 73.0%, respectively. The characterization results showed that there was a synergistic effect between CuO and NiO in the CuO-NiO catalysts. ©, 2015, Beijing Research Institute of Chemical Industry. All right reserved.


Sun X.,Shandong University | Sun X.,China Research Institute of Daily Chemical Industry | Xin X.,Shandong University | Tang N.,Shandong University | And 3 more authors.
Journal of Physical Chemistry B | Year: 2014

Supramolecular hydrogels were prepared in the mixtures of biological surfactant sodium deoxycholate (NaDC) and halide salts (NaCl and NaBr) in sodium phosphate buffer. It is very interesting that with the addition of two kinds of amino acids (l-lysine and l-arginine) to NaDC/NaX hydrogels, the gel becomes solution at room temperature. We characterized this performance through phase behavior observation, transmission electron microscopy, scanning electron microscopy, X-ray powder diffraction, Fourier transform infrared spectra, and rheological measurements. The results demonstrate that the gels are formed by intertwined fibrils, which are induced by enormous cycles of NaDC molecules driven by comprehensive noncovalent interactions, especially the hydrogen bonds. Our conclusion is that the presence of halide salts (NaCl and NaBr) enhances the formation of the gels, while the addition of amino acids (l-lysine and l-arginine) could make the breakage of the hydrogen bonds and weaken the formation of the gels. Moreover, its fast disassembly in the presence of amino acids allows for the release of substances (i.e., the dye methylene blue) entrapped within the gel network. The tunable gel morphology, microstructure, mechanical strength, and anisotropy verify the role of halide salts and amino acids in altering the properties of the gels, which can probably be exploited for a variety of applications in future. © 2014 American Chemical Society.


Wang R.,China Research Institute of Daily Chemical Industry | Li Y.,China Research Institute of Daily Chemical Industry
Journal of Chemical and Engineering Data | Year: 2013

The micellar and interfacial behavior of mixed systems of dodecyldiethoxylamine oxide/sodium dodecylsulfate (DDEAO/SDS) and dodecyldiethoxylamine oxide/dodecyltrimethylammonium chloride (DDEAO/DTAC) at various molar ratios were investigated by means of surface tension measurement. The various physicochemical properties such as surface activity parameters, the composition of mixed micelles, interactions between molecules and thermodynamic parameters have been evaluated. On the basis of several theories, such as regular solution theory, the ideal mixing model and Rosen's approaches, the results have been explained and compared. In DDEAO/DTAC mixed systems, the results display slight deviation from ideal behavior. However, there is a large negative deviation in DDEAO/SDS mixed systems. From the results of βm and βσ values, DDEAO/SDS mixed systems exhibit a stronger interaction and a greater synergism compared with the DDEAO/DTAC mixed systems. The negative values of ΔGads0 and ΔGm0 suggest that the adsorption at the mixed monolayer is preferable and the micelle formation is a spontaneous process, respectively. © 2013 American Chemical Society.


Dong H.,China Research Institute of Daily Chemical Industry | Du Z.,China Research Institute of Daily Chemical Industry | Zhao Y.,China Research Institute of Daily Chemical Industry | Zhou D.,China Research Institute of Daily Chemical Industry
Powder Technology | Year: 2010

Nano-magnesium hydroxide was prepared via wet precipitation by using the mixture of sodium dodecyl sulfate (SDS) and monoalcohol ether phosphate (MAP) as surface modifiers. The yield of the surface modified nano-Mg(OH)2 was about 98%. The usage and dosage of surface modifiers were optimized by means of the measurements of suspension volume of the nano-particles in liquid paraffin. As the mass ratio of SDS to MAP was 2:1 and the total of 0.2 wt.% of Mg(OH)2 theoretical weight (4.35 g) was used, the nano-Mg(OH)2 with optimized dispersibility was obtained. The volume percent of the surface modified nano-particles suspension in liquid paraffin could reach 96% after 11 h while that of the nano-Mg(OH)2 without modification would be 62%. The as-prepared samples were characterized through N2 adsorption, X-ray diffraction (XRD), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FTIR) and thermogravimetry-differential scanning calorimetry (TGA-DSC). The results show that hexagonal crystal nano-particles with both SDS and MAP molecules on the surfaces were obtained. The LOI value of PP composites is 35.0 at 150 phr (50% by weight) of surface modified nano-Mg(OH)2. © 2009 Elsevier B.V. All rights reserved.


Du Z.,China Research Institute of Daily Chemical Industry | Wang L.,China Research Institute of Daily Chemical Industry | Wang G.,China Research Institute of Daily Chemical Industry | Wang S.,China Research Institute of Daily Chemical Industry
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2011

Three glucosamide-grafted amphiphilic glycopolysiloxanes (APFPS-GL) were synthesized through a two-step method. First, the aminopropyl functional polysiloxanes (APFPS) were synthesized by equilibrium polymerization; then, gluconolactone was conjugated to the APFPS via ring-opening reaction to give the glycopolysiloxanes APFPS-GL. The final compositions of the amphiphilic glycopolysiloxanes were characterized by FT-IR, 1H NMR and 13C NMR. Surface activities and aggregation behavior in aqueous solution of these three glycopolysiloxanes were investigated by surface tension measurements, dynamic light scattering (DLS) and transmission electron microscopy (TEM). The results show that these three glycopolysiloxanes have much higher surface activity than those of conventional carbon-carbon chain glycopolymers in aqueous solution and they can self-assemble into spherical micelles with average diameters in the range from 200 to 600nm. © 2011 Elsevier B.V.


Wang R.,China Research Institute of Daily Chemical Industry | Li Y.,China Research Institute of Daily Chemical Industry | Li Q.,China Research Institute of Daily Chemical Industry
Journal of Surfactants and Detergents | Year: 2013

Dodecyldiethoxylamine oxide (DDEAO) was synthesized by the reaction of dodecyldiethoxylamine with hydrogen peroxide in water as the solvent. Surface activity, wetting ability and emulsifying capacity were investigated and compared with that of dodecyldimethylamine oxide (DDMAO). Results indicate that the critical micelle concentration (CMC) of DDEAO is lower than that of DDMAO, while its surface tension at CMC (γCMC) is slightly higher. The wetting ability of DDEAO is similar to that of DDMAO. For its capacity of emulsifying liquid paraffin, DDEAO is found to be better than DDMAO, but it is the opposite for emulsifying soybean oil. The foaming properties and thickening function of DDEAO in mixtures with alcohol ether sulfate and alkylbenzene sulfonate were also studied. As expected, complex surfactant systems exhibit good foaming ability and DDEAO exhibits a good thickening function. © 2013 AOCS.

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