Table of Content

22 December 2015, Volume 45 Issue 12 Previous Issue    Next Issue

JICHU YANJIU

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Phase behavior and stability of fatty acid soap systems LI Fang-fang, CHEN Ming-hua, ZHANG Wan-ping 2015, 45 (12):  661-669.  doi: 10.13218/j.cnki.csdc.2015.12.001 Abstract ( 437 )   PDF (1484KB) ( 582 )   Phase behavior and stability of soap base systems made of single fatty acid as well as blends of two and three kinds of fatty acid separately were studied.The influence of addition of glycerin on phase behavior and stability of the soap base systems were also discussed.Results showed that the phase behavior of soap base systems formed by two or three kinds of fatty acid (lauric,myristic,palmitic and stearic) may change that of soap base system of single fatty acid.Meanwhile,the addition of glycerin may also enlarge the region of micelle phase of the soap base system of the blended fatty acids,and part of micelle and crystal two phases changes into micelle and laminar two phases. References | Related Articles | Metrics

KEJI JIANGZUO

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Performance and applications of surfactants (Ⅹ ⅩⅢ) Application of surfactants in medicine ZHOU Ya-wen, LIU Jin-feng, JIA Mei-juan, ZHAO Li, XU Bao-cai 2015, 45 (12):  670-673.  doi: 10.13218/j.cnki.csdc.2015.12.002 Abstract ( 413 )   PDF (721KB) ( 522 )   The application of surfactants in pharmaceutical preparations,drug synthesis and pharmaceutical analysis were introduced.As an important assistant in many kinds of pharmaceutical preparations,surfactants,which have the function of emulsifying,wetting,solubilization,infiltration and co-solving,improve the performance and quality of drugs.Surfactants also can be used as the phase transfer catalyst in the synthesis of drugs and the solubilizer and sensitizer in the analysis of drugs.Finally,the application of surfactants in the field of medicine was summarized and prospected. References | Related Articles | Metrics

KAIFA YU YINGYONG

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Synthesis and performance of Gemini surfactant bis-(sodium N-ethylene dodecylamide ethyl sulfonate) WANG Ping, SHEN Yong, ZHANG Hui-fang, ZHU Tang-long 2015, 45 (12):  674-679.  doi: 10.13218/j.cnki.csdc.2015.12.003 Abstract ( 216 )   PDF (861KB) ( 332 )   Gemini surfactant bis-(sodium N-ethylene dodecylamide ethyl sulfonate) was prepared with ethylenediamine,lauric acid,phosphorus trichloride and sodium 2-bromo ethyl sulfonate as starting materials.The process conditions for synthesis of the intermediate were optimized and the structure of the final product was characterized.Performance of the final product,such as surface activity,foaming power and emulsifying power were measured.Results showed that aqueous solution of the final product at 24 ℃,the critical micelle concentration (cmc) value is 0.53 mmol/L,γcmc is 29.73 mN/m.It displays good surface activity,foaming power,and emulsifying power. References | Related Articles | Metrics

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Synthesis and properties of carboxybetaine and sulfobetaine surfactants LIU Yu, ZHENG Yan-cheng, HAN He-xiang, JIN Meng-ya, HE Zhi 2015, 45 (12):  680-684.  doi: 10.13218/j.cnki.csdc.2015.12.004 Abstract ( 304 )   PDF (821KB) ( 342 )   Palmitic acid and N,N-dimethyl-1,3-propane diamine were used as starting materials to synthesize the palmitic amide intermediate,which further reacted separately with sodium chloroacetate and sodium 3-chloro-2-hydroxy propane sulfonate via quaterization process to prepare palmitic amide dimethyl amino-carboxybetaine surfactant (C16ZC) and palmitic amide dimethyl amino hydroxy-propyl sulfobetaine surfactant (C16ZS) respectively.The effects of salts and temperature on the surface tension and critical micelle concentration (cmc) of the surfactants were measured and determined.The viscosity of solution of C16ZC and C16ZS were measured and discussed.The thermodynamic parameters were calculated in accordance with Gibbs micelle equations from the cmc of C16ZS and C16ZC at different temperature.Results showed that the cmc of C16ZC are lower than that of C16ZS while effect of inorganic salt on cmc and corresponding surface tension (γcmc) of C16ZC is higher than that of C16ZS,and effect of divalent salt (such as CaCl2) is even more higher than that of monovalent salt (such as NaCl).As temperature rises,cmc and γcmc of both C16ZC and C16ZS decline slightly.The thermodynamic parameters showed that micellization process for both products is found to be entropy-driven and C16ZC is easy to form micelle as a result of much lower Gibbs free energy for micellization (ΔGmicθ) compared with that of C16ZS.Addition of suitable dosage of inorganic salt can increase the viscosity of both products,and viscosity of C16ZC is more sensitive to inorganic salt than that of C16ZS. References | Related Articles | Metrics

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Synthesis and performance of asymmetric Gemini sulfosuccinate surfactant WANG Hong-di, MA Jian-zhong, LÜ Bin, GAO Jian-jing, XUE Dan 2015, 45 (12):  685-689.  doi: 10.13218/j.cnki.csdc.2015.12.005 Abstract ( 242 )   PDF (753KB) ( 296 )   Lauryl alcohol,maleic anhydride and lauric acid monoethanolamide were used as starting materials to synthesized asymmetric Gemini sulfosuccinate surfactant.The optimized conditions for diesterification are as following:reaction temperature,140 ℃;reaction time,6 h;and n(lauryl alcohol maleic acid monoester)∶n(lauric acid monoethanolamide)=1∶1.The structure of the target compound was characterized by FTIR and 1HNMR.The surface tension,foaming performance and emulsifying power of the product were measured.Results showed that the product has low cmc as 2.21×10-5 mol/L and γcmc as 31.1 mN/m.It displays stronger foaming power and better foam stability.Water separation time of the emulsion made of the product achieves 278 s. References | Related Articles | Metrics

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Synthesis and hydrolysis resisting capacity of ethoxylated ricinoleic acid methyl esters ZHANG Qian, SUN Yong-qiang, WANG Wan-xu, ZHI Li-fei, Martino Di Serio, LIU Wei 2015, 45 (12):  690-693.  doi: 10.13218/j.cnki.csdc.2015.12.006 Abstract ( 291 )   PDF (1861KB) ( 516 )   Ethoxylated ricinoleic acid methyl esters (ECAME-10) obtained directly from castor oil acid methyl esters by the use of a special homogeneous catalyst.The average ethylene oxide (EO) adduct number of ECAME-10 was determined by saponification value,gas chromatography (GC) and 1HNMR.The hydrolysis resisting capacity of ECAME-10 was investigated under different pH value conditions.The appearance changes of ECAME-10 solution under different storing time periods was tracked and photographed and surface tension of different stages of the solution at different stages was measured.Results showed that the hydrolysis resisting capacity of ECAME-10 is rather strong.The hydrolysis rate of ECAME-10 is below 40% in pH value range of 4-9 after eight weeks.Surface tension of solutions can be kept stable after the hydrolysis reaction. References | Related Articles | Metrics

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Promotion effect of octylphenyl ethoxylate surfactant series on coal slime flotation SONG Xian-peng, FAN Min-qiang, FAN Jin-chuan 2015, 45 (12):  694-696.  doi: 10.13218/j.cnki.csdc.2015.12.007 Abstract ( 285 )   PDF (713KB) ( 377 )   Octylphenyl ethoxylate (OP) surfactant series was blended with kerosene to be used as collecting agent for flotation of coal slime from crude coal of Tunlan coal mine.Dispersity of separate collecting agent in water as well as contact angle of the refine coal was measured and determined.Results showed that the blends of OP and kerosene display obvious promotion effects on the flotation of coal slime and the blend of OP-4 and kerosene displays better effect than others in the series.As comparing with the same dosage of kerosene singly,the yield of refined coal and ash content of tailing coal increases 11.87 and 17.85 percentage points respectively;as well as the combustible recovery and flotation perfect index,increases 12.91 and 3.12 percentage points respectively.It indicated that the promotion effect is enhanced due to the improvement of diffusion of kerosene in water,and the upgrading of contact angle of the refined coal,which lead to improvement of its hydrophoby. References | Related Articles | Metrics

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Studies on the oil/water interfacial properties of anionic/cationic blended Gemini surfactant systems HOU Cong, WU Xiao-mei, LAI Lu, CHENG Li, MEI Ping 2015, 45 (12):  697-701.  doi: 10.13218/j.cnki.csdc.2015.12.008 Abstract ( 245 )   PDF (743KB) ( 321 )   The oil/water interfacial properties of binary blended systems of sulfonate Gemini surfactant (SGS-12) with single cationic surfactants (DTAC and CTAB),bis-quaternary ammonium salts (CD2N-12 and CD2N-16),and multiple quaternary ammonium salt (CD3N-12) were investigated.Results showed that the blended systems of SGS-12/DTAC,SGS-12/CTAB and SGS-12/CD2N-12 display synergism in oil/water interface tension reduction effectiveness.When the blending ratio of SGS-12 to DTAC is 3∶5,the interfacial tension between the aqueous system and crude oil can be decreased to 2.29×10-3 mN/m as the minimum.The lowest interfacial tension of the blended system of SGS-12/CTAB can achieve 1.84×10-3 mN/m at a 9∶5 blend ratio.When the blending ratio of SGS-12 to CD2N-12 is 6∶5,the interfacial tension can be reduced to 4.3×10-3 mN/m as the minimum.However,the blended systems of SGS-12/CD2N-16 and SGS-12/CD3N-12 exhibit no obvious synergism. References | Related Articles | Metrics

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Application of anionic-nonionic Gemini surfactants in neutral deinking of waste paper CHEN Hong, ZHU Bao-wei, ZHANG Dan, ZHAO Wei 2015, 45 (12):  702-705.  doi: 10.13218/j.cnki.csdc.2015.12.009 Abstract ( 286 )   PDF (708KB) ( 296 )   Efficacy for neutral deinking of waste recycled newspaper with laboratory prepared new anionic-nonionic Gemini surfactant was examined.Via orthogonal designed tests,the optimal operating conditions for the neutral deinking process were identified as follows:deinking agent dosage,0.8% (refer to mass of dry waste newspaper):pulping time,3 h;flotation time,30 min;curing time,50 min;curing temperature,50 ℃.The deinking efficacy of the new anionic-nonionic Gemini surfactants was compared separately with that of conventional anionic and nonionic surfactants,and the experimental results showed that the former is better.Meanwhile,the deinking efficacy of the blend of the new anionic-nonionic Gemini surfactant with other surfactants was also examined and the results showed that there is good synergistic effect between the new Gemini surfactant and other surfactants. References | Related Articles | Metrics

ZHUANLUN YU ZONGSHU

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Application of molecular simulation method in research work with respect to solution properties of Gemini surfactants LI Shuang-yang, MIN Chang-ting, CAO Kang-ling 2015, 45 (12):  706-709.  doi: 10.13218/j.cnki.csdc.2015.12.010 Abstract ( 240 )   PDF (1883KB) ( 376 )   Research work achievements with respect to solution properties of Gemini surfactant with molecular simulation method were summarized.The aggregation process and mechanism,the morphology of micelles in equilibrium,phase transition process,the synergistic effect between Gemini surfactant and other molecules as well as various influencing factors of the Gemini surfactants found via molecular simulation calculation method were introduced.In addition,the interfacial properties of Gemini surfactants were also presented.Outlooks for the application of molecular simulation method in this field were prospected. References | Related Articles | Metrics

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Review on research work with respect to physical stability of pesticide suspension concentrates FENG Jian-guo, XIANG Sheng, YU Qian-yao, WU Xue-min 2015, 45 (12):  710-714.  doi: 10.13218/j.cnki.csdc.2015.12.011 Abstract ( 309 )   PDF (951KB) ( 319 )   Mechanism for formation and physical stabilization of suspensions were briefed.Status about research work and application of relevant theory and methods with respect to physical stability of pesticide suspension concentrates were emphatically described.Current existing problems in the research and development work for pesticide suspension concentrates,such as deficiency of theoretical research work on new pesticide dosage form based upon formation of suspension,as well as upgrading of performance of adjuvant used for pesticide formulations were discussed. References | Related Articles | Metrics

FENXI YU JIANCE

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Simultaneous determination of content of five kinds of anti-dandruff agent in shampoo by high performance liquid chromatography GUO Jie, ZHANG Hua-jun, LIU Qi, ZHANG Rong 2015, 45 (12):  715-718.  doi: 10.13218/j.cnki.csdc.2015.12.012 Abstract ( 384 )   PDF (760KB) ( 343 )   A high performance liquid chromatography method with gradient elution was established for simultaneous determination of anti-dandruff agent salicylic acid,pyrithione zinc,ketoconazole,climbazole and octopirox in shampoo formulations.A C18 column was used as stationary phase,and mixture containing acetonitrile-methanol aqueous solution (0.01 mol/L KH2PO4 and 0.5 mmol/L EDTA-2Na,pH adjusted to 4 with H3PO4) eluted by gradient was used as mobile phase in the HPLC at the wavelength of 230 nm.Operating temperature was 35 ℃.Injection volume was 5 μL.The linearity range of salicylic acid,pyrithione zinc,ketoconazole and climbazole is 10~200 mg/L.The linearity range of octopirox is 20~400 mg/L.The detection limits for salicylic acid,pyrithione zinc,ketoconazole,climbazole and octopirox are 0.26,0.53,0.26,0.26 and 2.0 mg/L respectively.The spiked recovery of matrix for salicylic acid,pyrithione zinc,ketoconazole,climbazole and octopirox varies from 96.04% to 98.42%.Among test results of 83 shampoo samples from market,pyrithione zinc appears in 57 samples;octopirox appears in 18 samples;salicylic acid appears in 7 samples;climbazole appears in 3 samples;banned substance ketoconazole is not detected.The contents of anti-dandruff agents in all samples meet the relevant standard requirements. References | Related Articles | Metrics