Table of Content

22 April 2017, Volume 47 Issue 4 Previous Issue    Next Issue

Basic research

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Synthesis and properties of cationic Gemini surfactant containing bis-piperidinium group XIE Yi-cheng, XU Hu-jun, LIU Jia-jia, LIU Fan 2017, 47 (4):  181-185.  doi: 10.13218/j.cnki.csdc.2017.04.001 Abstract ( 312 )   PDF (863KB) ( 368 )   A cationic Gemini surfactant containing bis-piperidinium group (hereinafter refers to as C10-CGP) was synthesized via three steps with aniline,epichlorohydrin,piperidine and 1-bromodecane as starting materials.The product was characterized by FT-IR,MS and 1H NMR.The Krafft point and emulsifying power of the product as well as performance of emulsified asphalt prepared with the product were examined.The critical micelle concentration (cmc) and corresponding surface tension (γcmc) of C10-CGP were measured at temperature range from 25 ℃ to 40 ℃ and thermodynamic parameters of the micellization were calculated.Results show that the Krafft point of C10-CGP is below 0 ℃;stable time of emulsified liquid achieves 532 s;the cmc and γcmc at 25 ℃ is 0.976×10-3 mol/L and 28.93 mN/m respectively.With the increase of temperature,the cmc increases,while the γcmc decreases,the maximum surface adsorption capacity (Γmax) decreases and the minimum molecule sectional area (Amin) increases.Emulsified asphalt test shows that C10-CGP is a slow-crack type asphalt emulsifier;storage stability of the emulsified asphalt is good and particle size distribution of the emulsified asphalt is narrow. References | Related Articles | Metrics

Lecture of science and technolog

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Synthesis and application of ionic liquid surfactants (Ⅳ)Surface activities HUI Meng-meng, ZOU Wen-yuan, YANG Xu-zhao, XU Qing-jie, WANG Jun 2017, 47 (4):  186-191.  doi: 10.13218/j.cnki.csdc.2017.04.002 Abstract ( 269 )   PDF (778KB) ( 267 )   According to the type of ionic liquid surfactants,the effect of the surfactant structure on the surface activity parameters,such as critical micelle concentration (cmc),lowest surface tension (γcmc),surface adsorption efficiency (pc20),maximun surface adsorption (Γmax) and minimum molecular sectional area (Amin) were summarized separately.As compared with traditional surfactants,the introduction of ionic liquid group upgrades surface active performance of the surfactant and varieties of surfactant were increased.The effect of alkyl carbon chain length on the surface active performance of ionic liquid surfactants is similar to that of the traditional surfactants. References | Related Articles | Metrics

Development and applicatio

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Effect of nonionic surfactants on the bactericidal performance of the composite cationic disinfectant ZHAO Liu-chen, ZHANG Hui, WANG Wan-xu, WANG Guo-yong 2017, 47 (4):  192-196.  doi: 10.13218/j.cnki.csdc.2017.04.003 Abstract ( 423 )   PDF (689KB) ( 374 )   Effect of number of EO adducted into palm oil ethoxylate (NOE-Pn) (n=3,6,9,12 or 14) with a mass concentration of 50 mg/L on bactericidal activity of the composite cationic disinfectant that consists of didecyldimethylammonium formate (DDAF),dialkyldimethylammonium chloride (carbon chain length 8-10,D8-10),poly hexamethylene bis-guanidine hydrochloride salt (IB),didecylmethylhydroxyethylammonium chloride (DEQ) and lauryldimethylbenzylammonium chloride (1227),with a composite mass ratio of DDAF/D8-10/IB/DEQ/1227 of 3/2/3/3/3 and an overall mass concentration of 140 mg/L was examined.Results show that the influence on composite cationic disinfectant caused by NOE-Pn occurs at n=9 (i.e.,NOE-P9) with a treatment time period of 20 min is at the minimum,which is basically same as that of fatty alcohol polyoxyethylene (9) ether (AEO9).Furthermore,introduction of either nonionic surfactant NOE-P9,AEO9,alkyl polyglycoside (APG0810) or anionic-nonionic surfactant fatty alcohol polyoxyethylene (9) ether carboxylic acid (AE9C) will result in significant impact on bactericidal activity of composite cationic disinfectant with respect to Candida albicans (ATCC10231).Comparison between effects of increase of mass concentration to 180 mg/L and extension of treatment time period up to 1 h was made and results show that the increase of mass concentration can slightly improve the bactericidal performance,while the extension of treatment time period can conspicuously raise the bactericidal efficacy especially for Staphylococcus aureus (ATCC6538) and Escherichia coli (ATCC8099),both the value of KL is higher than 6. References | Related Articles | Metrics

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Water separation performance and mechanism of fluoro-silicone amphiphilic polymers in diesel oil-water emulsion system ZHANG Cheng-feng, LIU Xi, BAI Xue-li, XUE Dan-dan, SUN Hui-yan, ZHANG Jian, ZHANG Yue 2017, 47 (4):  197-201.  doi: 10.13218/j.cnki.csdc.2017.04.004 Abstract ( 276 )   PDF (1988KB) ( 277 )   Water separation efficacy of diesel oil-water emulsion system of four kinds of fluoro-silicone polymer with different degree of polymerization of the fluorinated chain was evaluated,and the mechanism for such phenomena was studied via interfacial tension and interfacial viscoelasticity measurements.Results show that,following the increase of degree of polymerization of the fluorinated chain,time needed for diesel oil-water separation decreases firstly and then increases.In case the degree of polymerization of the fluorinated chain achieves 16 and the mass concentration of fluoro-silicone polymer achieves 0.2 g/L,complete separation of diesel oil and water can be performed within 23 s.Interfacial tension is not the main factor affecting the water separation efficacy.Effective water separation of this kind of polymer is mainly caused by reduction of viscoelasticity of the interfacial film. References | Related Articles | Metrics

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Study on emulsifying performance of two kinds of polymer-surfactant and crude oil from Bohai Oilfield Section B LÜ Peng, WANG Cheng-sheng, WU Xiao-yan, ZUO Qing-quan, WU Ya-li, FAN Jun-lou 2017, 47 (4):  202-206.  doi: 10.13218/j.cnki.csdc.2017.04.005 Abstract ( 271 )   PDF (747KB) ( 301 )   Stability performance of emulsion generated with simulated crude oil composed of dewatered crude oil from Bohai Oilfield Section B and kerosene as the oil phase and solution of polymer-surfactant JBJ-1,JBJ-2 or conventional polymer Pn as the water phase at the water-oil volume ratio of 8∶2 was examined.Results show that the emulsion generated with polymer-surfactant was comparatively more stable.Viscosity is not the main influencing factor of emulsion stability.The stability of emulsion was examined at different mass concentrations of polymer-surfactant solution and at different water-oil volume ratios.Results show that the emulsion stability improves with the increase of mass concentration of polymer-surfactant.For the same kind of polymer-surfactant,when the mass concentration of JBJ-1 at 0.2 g/L or JBJ-2 at 0.2 and 0.4 g/L,the emulsion stability decreases,but the emulsion stability becomes better at a higher mass concentration (ρ( JBJ-1)>0.2 g/L,or ρ(JBJ-2)>0.4 g/L) with the increase of water-oil volume ratio.The demulsification time delays and the maximum water decantation rate increases. References | Related Articles | Metrics

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Study on cosmetological efficacy of glacier water and Meconopsis quintuplinervia extract CHEN Di, ZHANG Zhang, JIANG Yao-quan, FANG Zhao-hua, CONG Feng-song 2017, 47 (4):  207-211.  doi: 10.13218/j.cnki.csdc.2017.04.006 Abstract ( 677 )   PDF (1309KB) ( 424 )   The effect of glacier water and Meconopsis quintuplinervia extract on human dermal fibroblast-adult (HDF-a) was studied respectively and collaboratively.Effect of glacier water and Meconopsis quintuplinervia extract on cell proliferation activity of HDF-a was evaluated by MTT assay and on level of cellular ATP (adenosine triphosphate) with an ATP Assay Kit.Effect of glacier water and Meconopsis quintuplinervia extract on content of hyaluronic acid in extracellular matrix (ECM) of HDF-a was evaluated by Enzyme-linked immunosorbent assay (ELISA) and their effect on expression of collagenⅠand elastin in ECM was detected by Western Blot.The results show that,as comparing with the control group,glacier water can promote the proliferation activity and energy metabolism level of HDF-a as well as enhancing cellular content of hyaluronic acid compared with the control group.Glacier water also displays a capacity of enhancing the expression of elastin.All of the above-mentioned differences are statistically significant.The effect of Meconopsis quintuplinervia extract with respect to the above-mentioned aspects is more obvious than that of glacier water,and the extract shows an ability of promoting the expression of collagenⅠ.When glacier water and Meconopsis quintuplinervia extract are used collaboratively,their efficacy on HDF-a is much more obvious. References | Related Articles | Metrics

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Preparation technology of solid lipid nanoparticles for encapsulation of nano-titanium dioxide LI Ling-yu, ZHANG Wan-ping, ZHANG Qian-jie 2017, 47 (4):  212-218.  doi: 10.13218/j.cnki.csdc.2017.04.007 Abstract ( 255 )   PDF (7360KB) ( 222 )   Nano-TiO2 encapsulated with solid lipid nanoparticles was prepared by interface compound generation method,and the formulation was optimized.The influences of blending ratio of emulsifiers sodium stearoyl glutamate (SG) to fatty alcohol polyoxyethylene ether-21 (S21),as well as the mass fraction of solid lipid (docosanol) and liquid lipid (silicone oil 345) on quality and sunscreening performance of the product were studied.Results show that under conditions as:mass fraction of nano-TiO2,3%;total mass fraction of emulsifiers,8% (in which m(SG)∶m(S21)=2∶1);mass fraction of docosanol,4.5%;mass fraction of silicone oil 345,4.5%;average particle size of solid lipid nanoparticles encapsulated nano-TiO2 product achieves 219.7 nm,and value of polydispersity index (PDI) achieves 0.221.The system stability of the product is quite good.Comparison of the various influencing factors shows that,for a fixed mass fraction of nano-TiO2,the blending ratio of the emulsifiers as well as mass fraction of the liquid lipid displays rather big influence on UV absorption performance of the product,while that of solid lipid is not big. References | Related Articles | Metrics

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Inhibitory action of extracts from water lily flower on tyrosinase activity and its kinetics LI Qian, LI Chen-yang, ZHAN Yu-jiao, ABUDUREYIMU Maiwulajiang, XU Fang, ZHAO Jun 2017, 47 (4):  219-222.  doi: 10.13218/j.cnki.csdc.2017.04.008 Abstract ( 318 )   PDF (723KB) ( 313 )   Tyrosinase inhibitory ratio of extracts from water lily (Nymphaea candida Presl.) flower (70% ethanol extract,NCE;30% ethanol elution parts,NCEA;50% ethanol elution parts,NCEB) were obtained based upon determination of dopa quinone with ultraviolet spectrophotometer.Furthermore,the effect of the extracts on monophenolase activity of tyrosinase and its inhibiting mechanism were examined by enzyme reaction kinetics method adopting L-tyrosine as substrate.Results show that these extracts can obviously inhibit activity of tyrosinase,of which NCEA displays the best inhibition effect as comparing with that of NCE and NCEB.The inhibition of NCEA on monophenolase activity of tyrosinase displays as reversible anti-competitive inhibition;while NCEB displays as reversible inhibition with mixed inhibition under low concentration condition,and competitive inhibition under high concentration condition. References | Related Articles | Metrics

Review

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Types,performance and effect of macromolecular surfactants used for gypsum ore processing AN Zhuan-zhuan, ZHOU Ping-ping, WU Hua-chun, XIA Yong-mei, FANG Yun, WANG Hai-jun 2017, 47 (4):  223-227.  doi: 10.13218/j.cnki.csdc.2017.04.009 Abstract ( 293 )   PDF (748KB) ( 302 )   Effect of various types of macromolecular surfactant used for gypsum ore processing,such as lignosulfonates,naphthalene derivatives,melamine,aminosulfonic acid series,polycarboxylate series and polycarboxylate polyether sulfonates (sulfates) as well as their effect on performance of the gypsum plaster product and hydration process of calcium sulfate hemihydrate was summarized.Problems for development of macromolecular surfactants in gypsum ore processing were discussed. References | Related Articles | Metrics

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Progress in field of research work for application of human-skin models in efficacy evaluation of cosmetics KONG Xue, ZHAO Hua, TANG Ying 2017, 47 (4):  228-231.  doi: 10.13218/j.cnki.csdc.2017.04.010 Abstract ( 592 )   PDF (736KB) ( 716 )   Three-dimensional reconstructed human-skin models and current status with respect to research work for application of three-dimensional reconstructed human-skin models in the fields of depigmentation and sunscreen,skin barrier function,moisturizing and anti-sanility,sensitiveness releasing and renewal as well as protection against air pollution were summarized.The advantages and disadvantages of the human-skin models used currently were discussed with comments and suggestions for its future development. References | Related Articles | Metrics

Analytical methods and testing

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Determination of monose and polysaccharides in glucoside-based surfactant products by HPLC ZHANG Jun, YANG Xiu-quan, ZHOU Yuan, SUN Yong-qiang, LI Yun-ling 2017, 47 (4):  232-240.  doi: 10.13218/j.cnki.csdc.2017.04.011 Abstract ( 355 )   PDF (1122KB) ( 291 )   A HPLC method for simultaneous determination of contents of monose and polysaccharides in glucoside-based surfactant products was established.The method adopts evaporative light-scattering detector and Zorbax Eclipse Plus C18 column (4.6 mm×100 mm,3.5 μm) with methanol and water as the mobile phase at a rate of 1.0 mL/min.The contents of saccharides were calculated by external standard two-point method using glucose and maltotriose as control samples.Results show that the detection limit of monose and polysaccharides is 1.5 and 2.0 μg/L respectively while the recovery is 100.4% and 99.1% respectively.As comparing with the conventional methods,this method displays unique superiority in determination of non-reducing monose and the residual glucose from raw material for preparation of glucoside-based surfactants as well as the by-products polysaccharides can be determined simultaneously. References | Related Articles | Metrics