Table of Content

22 April 2016, Volume 46 Issue 4 Previous Issue    Next Issue

Basicresearc

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Quantitative determination of SDBS and OP-10 binary blend system based on the revised spectrum induced by HP-β-CD SHI Dong-po, YIN Xian-qing, CHEN Wu, ZHENG Yan-cheng, LI Geng 2016, 46 (4):  183-188.  doi: 10.13218/j.cnki.csdc.2016.04.001 Abstract ( 266 )   PDF (811KB) ( 311 )   The interaction between sodium dodecyl benzene sulfonate (SDBS) and ethoxylated octylphenol (OP-10) could have a significant impact on the quantitative determination of SDBS/OP-10 binary blend in aqueous solution.Experimental results indicated that the apparent critical micelle concentration (cmc) values and the fluorescence intensities of SDBS measured by synchronous fluorescence spectrometry could be greatly changed because of the existence of OP-10.The cmc values of SDBS reduce from 1.183 mmol/L to 1.011,0.861 and 0.658 mmol/L when the concentrations of OP-10 increase from 0 to 0.500,1.000 and 2.000 mmol/L in water respectively,and the fluorescence intensities of SDBS would be increased with the increasing concentration of OP-10.On the other hand,the existence of SDBS could also have a significant impact on the quantitative analysis of OP-10 in aqueous solution by chemical colorimetry.The results indicated that the interaction between SDBS and OP-10 could be greatly reduced by adding 1∶1 hydroxypropyl-β-cyclodextrin (HP-β-CD) according to the molar amount of SDBS,thus,the recovery rates of SDBS and OP-10 change from 80.2%-105.2% and 65.4%-93.1% to 101.1%-101.4% and 101.4%-102.6% respectively,which showed that the measurement veracity of SDBS and OP-10 in SDBS/OP-10 binary blend has been greatly improved.The experimental results of Job’s test and FT-IR analysis exhibited that the interaction between SDBS and OP-10 could be greatly reduced because of the formation of HP-β-CD/SDBS inclusion compound with molar ratio of 1∶1. References | Related Articles | Metrics

Lectureofscienceandtechnolog

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Fluorinated surfactants and fluoropolymers (Ⅳ) Strategy for PFOS problems XING Hang,JIA Xu-hong,XIAO Jin-xin 2016, 46 (4):  189-194.  doi: 10.13218/j.cnki.csdc.2016.04.002 Abstract ( 275 )   PDF (727KB) ( 573 )   Some fluorinated alkyl substances are necessary in nowadays many fields because of the special properties of fluorocarbon chains.However,the traditional environmental and toxicity problems of PFOS have to be resolved.Several ways for solving the concerning problems were discussed,including the possibilities for degradation,separation and recycling use,as well as reducing the concentration in the application to be lower than the specified limit.The most reliable one is to obtain substitute for the PFOS.Several kinds of substitute were introduced and their rationality of application was also discussed. References | Related Articles | Metrics

Developmentandapplicatio

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Synthesis and surface activity of a novel Gemini pyridinium surfactant HAO Jun-sheng,WANG Pan,ZHANG Yue,ZHANG Yong-bin 2016, 46 (4):  195-199.  doi: 10.13218/j.cnki.csdc.2016.04.003 Abstract ( 272 )   PDF (809KB) ( 304 )   The intermediate 1,3-di(3-pyridyl)urea was synthesized by the reaction of 3-aminopyridine and triphosgene.The optimized conditions for the reaction were found as follows:reaction solvent,methylene chloride;reaction time,5 h;mole ratio of 3-aminopyridine and triphosgene,5∶1.The yield is 78%.Then the intermediate reacted with bromododecane to produce a new type of Gemini pyridinium surfactant.The optimized conditions were identified as follows:reaction time,5 h;reaction temperature,110 ℃;mole ratio of the intermediate and bromododecane,1∶10.The yield is 90 %.The structure of the target product was characterized by FT-IR,1H NMR,13C NMR and ESI-MS.The surface tension of the product was measured as cmc value of 1.67×10-4 mol/L and γcmc of 30.7 mN/m. References | Related Articles | Metrics

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Adsorption performance of lauramidopropyl amine oxide ZHANG Wen,GE Ji-jiang,ZHANG Gui-cai,WANG Yang,SONG Kai-fei 2016, 46 (4):  200-203.  doi: 10.13218/j.cnki.csdc.2016.04.004 Abstract ( 280 )   PDF (684KB) ( 421 )   Lauramidopropyl amine oxide (LAO) was synthesized.The isoelectric point of LAO,the effect of pH and temperature on adsorption behavior of LAO on the surface of the quartz sand and the effect of LAO on contact angle of the dodecane/water/glass were systematically investigated by using pH meter,high performance liquid chromatograph and surface tension meter respectively.Results showed that the isoelectric point of LAO is close to pH of 9;the increase of pH causes the critical micelle concentration of LAO to decrease;the increase of temperature and pH causes the adsorption of LAO on the surface of quartz sand to decrease;the contact angle of the dodecane/water/glass increases firstly,and then decreases to balance by increasing the mass concentration of LAO;the adsorption mechanism of LAO on the surface of quartz sand is double layer adsorption. References | Related Articles | Metrics

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Synthesis of betaine surfactant and its micellar catalysis action on alkaline hydrolysis of acetic esters ZHOU Yang,PAN Zhong-wen,CHEN Geng,SUN Shuo 2016, 46 (4):  204-207.  doi: 10.13218/j.cnki.csdc.2016.04.005 Abstract ( 236 )   PDF (850KB) ( 297 )   Two kinds of betaine surfactant (C-12 and C-16) were synthesized in laboratory.Alkaline hydrolysis of ethyl acetate and amyl acetate,under 25 ℃ in micellar solution of C-12 and C-16 separately was studied in accordance with electric conductivity method.In case without use of surfactant,the hydrolysis rate constant (k) of ethyl acetate and amyl acetate is 0.111 and 0.082 L/(mol·s) respectively.In case surfactant is used and the concentration of surfactant is 8×10-4 mol/L,the k of ethyl acetate and amyl acetate to C-12 is 0.183 and 0.112 L/(mol·s) respectively,and the corresponding to C-16 is 0.226 and 0.135 L/(mol·s) respectively.The results indicated that C-12 and C-16 can catalyze the hydrolysis of acetates.Under same conditions,the rate of hydrolysis for ethyl acetate is faster than amyl acetate. References | Related Articles | Metrics

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Study on interfacial tension of mimetic oil and water system with blend surfactants LIU Xuan-chi,ZHANG Ya-gang,YU Er-lei,CUI Ping-zheng,WUMANJIANG Eli 2016, 46 (4):  208-211.  doi: 10.13218/j.cnki.csdc.2016.04.006 Abstract ( 365 )   PDF (949KB) ( 755 )   Interfacial tension of kerosene-water system with different types of surfactant (anionic,cationic and nonionic surfactant as well as polymeric Gemini surfactant and asymmetric amphoteric Gemini surfactants) was investigated and compared.Results showed that nonionic surfactant is the one which may display lowest interfacial tension of 0.690 mN/m.Ethoxylated octylphenol nonionic surfactant (OP type) was selected to be blended with different types of other surfactants to examine the effects of type of the blend surfactant and their mass ratio,as well as the overall mass concentration on the interfacial tension of the mimetic oil-water system.Results showed the blend surfactant composed of ethoxylated octylphenol and asymmetric amphoteric Gemini surfactant (C15EC-S-C16,laboratory prepared) with mass ratio of 7∶3 and overall mass concentration of 50 g/L can reduce the interfacial tension to a minimum value of 0.024 mN/m. References | Related Articles | Metrics

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Synthesis and characterization of citric acid anhydride JIN Zhu,ZHANG Jun,YANG Xiao-yi,YANG Xiu-quan,ZHOU Yuan 2016, 46 (4):  212-215.  doi: 10.13218/j.cnki.csdc.2016.04.007 Abstract ( 721 )   PDF (710KB) ( 556 )   Citric acid anhydride was prepared in laboratory with anhydrous citric acid and acetic anhydride as starting materials.Effects of mole ratio of the reactants,reaction temperature and dosage of solvent on the conversion and the yield were investigated with titration method via single factor tests.Results indicated that the yield of citric acid anhydride is 88.8% at the suitable conditions as reaction temperature 52 ℃,reaction time 1.5 h,n(acetic anhydride)∶n(citric acid)=1.2 ∶1 and n(acetic acid)∶n(citric acid)=1.0∶1.Chemical structure of the product was characterized by FT-IR,1H NMR and MS,and the results of characterization showed that the product is a five member cyclo-anhydride. References | Related Articles | Metrics

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Study on the dissolution of soybean meal and the surface activity of the dissolved products CHENG Hai-tao, SHEN Xian-shuang 2016, 46 (4):  216-218.  doi: 10.13218/j.cnki.csdc.2016.04.008 Abstract ( 273 )   PDF (637KB) ( 347 )   A new process for the acid dissolution of soybean meal under pressure was studied.The optimum conditions for the dissolution process were studied with solubility of soybean meal through orthogonal test.The results showed that the optimum dissolution conditions are:sulfuric acid mass fraction,20%;reaction time,20 min;temperature (pressure),110 ℃ (0.104 5 MPa);liquid to solid mass ratio,10.Surface activity test of the dissolved soybean meal showed that the product displays good surface activity. References | Related Articles | Metrics

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Preparation of alginate caprylamide and its function for stabilizing liquid paraffin/water emulsions in cooperationwith amino-silica nanoparticles CHEN Xiu-qiong,YAN Hui-qiong,FENG Yu-hong,SHI Zai-feng,WANG Xiang-hui,LIN Qiang 2016, 46 (4):  219-225.  doi: 10.13218/j.cnki.csdc.2016.04.00 Abstract ( 234 )   PDF (6824KB) ( 272 )   Amphiphilic alginate caprylamide (ACA) was prepared via the amidation using the octylamine as a hydrophobic modifier.Then,O/W Pickering emulsions were prepared by mixing ACA with SiO2-NH2 nanoparticles formed by modified Stber method under the action of ultrasonic wave.The structure and performance of ACA were characterized by FT-IR,1H NMR and fluorescence spectrum.The colloidal performance of ACA,SiO2-NH2 and their synergistic water dispersion system,as well as the morphology of the corresponding Pickering emulsions were investigated by the means of laser particle size and Zeta potential analyzer,contact angle meter and optical microscope.Experimental results showed that ACA with the degree of substitution of 0.29,exhibits good amphiphilic properties with the critical aggregation concentration (cac) of 0.42 g/L in 0.15 mol/L aqueous NaCl solution.ACA is successfully adsorbed on the surface of SiO2-NH2 nanoparticles via electrostatic force,causing the hydrodynamic size of SiO2-NH2 increases from 155 nm to 386 nm,and the Zeta potential of SiO2-NH2 changes from +22.2 mV to -30.7 mV,which can exhibit good stabilizing performance in aqueous solution.ACA absorbed on the surface of SiO2-NH2 nanoparticles can inhibit the aggregation and settlement of inorganic nanoparticles while the hydrophobic cavity of the micelle structure formed by free ACA can solubilize the oil droplets,reduce the coalescence of small oil droplets.The co-existence of larger Pickering emulsion droplets and smaller traditional emulsion droplets appear in the optical microscope images.When the mass concentration of ACA is in the range of 0.5 cac-1.0 cac,the co-existence of the two kinds of emulsions is the most obvious phenomenon. References | Related Articles | Metrics

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Analysis of fermentation liquor of Ganoderma lucidum and evaluation of its whitening and anti-senility efficacy ZHAO Dan,XU Dan-ni,WANG Dong-dong,ZHANG Jia-chan,LI Meng,WANG Chang-tao 2016, 46 (4):  226-230.  doi: 10.13218/j.cnki.csdc.2016.04.010 Abstract ( 478 )   PDF (1649KB) ( 382 )   To develop the application of fermentation liquor of Ganoderma lucidum in the field of cosmetics,Saccharomyces ellipsoideus were used to acquire fermentation liquor Ganoderma lucidum,and the content of total polysaccharides,total polyphenols,total flavones and total polypeptides in the fermentation liquor were determined.The scavenging activity of OH·free radicals and DPPH free radicals as well as the influence on fibroblasts viability were measured to evaluate the possible anti-senility effect of the fermentation liquor.Finally,via in vitro tyrosinase activity test and intracellular tyrosinase activity test on melanin synthesis of mouses as well as melanin inhibition test,the evaluation for whitening effect of the fermentation liquor was conducted.Results showed that the fermentation liquor of Ganoderma lucidum contains 9.910 g/L of total polysaccharides,0.054 g/L of total polyphenols,0.045 g/L of total flavones,and 2.931 g/L of total polypeptides.The fermentation liquor with 25.89% and 42.18% volume fraction of fermentation liquor of Ganoderma lucidum could eliminate 50% OH·free radical and DPPH free radical.The fermentation liquor with 0.05%-0.2% volume fraction can promote fibroblasts proliferation effectively.The activity of tyrosinase is inhibited significantly by the fermentation liquor of Ganoderma lucidum and the inhibition rate reaches 73.22%.The fermentation liquor of Ganoderma lucidum could inhibit melanin synthesis by decreasing activity of tyrosinase.The fermentation liquor of Ganoderma lucidum exhibits efficacy for anti-senility and whitening. References | Related Articles | Metrics

Review

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Research work development with respect to trimeric surfactants LIAO Xue-ming,GAO Zhi-nong,XIA Yan,WEI Wan-ying,ZHOU Hang,PAN Chen-chen 2016, 46 (4):  231-237.  doi: 10.13218/j.cnki.csdc.2016.04.011    Abstract ( 173 )   PDF (1222KB) ( 377 )   Classification and synthesis method of trimeric surfactans as well as effect of structure on their performance and applications were summarized.According to the different electrical property of hydrophilic head groups of trimeric surfactants,they can be classified into four classes,as cationic type,anionic type,nonionic type and amphoteric type.Based upon their structure characteristics,designs of various synthesis routes,for preparing trimeric surfactants with different head groups,different space groups and different tail chains were described.Finally,performance of trimeric surfactants and their applications in various domains,such as preparation of nanomaterials,emulsion polymerization and so on were introduced.The future trend of development in this field was predicted as well. References | Related Articles | Metrics

Analyticalmethodsandtestin

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Determination of urocanic acid and its ethyl ester in sunscreen cosmetics by HPLC GUO Xiang-yu,MA Qiang,MENG Xian-shuang,LI Tao,LI Wen-ya,BAI Hua 2016, 46 (4):  238-242.  doi: 10.13218/j.cnki.csdc.2016.04.012 Abstract ( 259 )   PDF (777KB) ( 344 )   A high performance liquid chromatography (HPLC) was established for the simultaneous determination of urocanic acid and its ethyl ester in sunscreen cosmetics.The result was comfirmed with mass spectrometry.Cosmetic samples were extracted with methanol under assistance of ultrasonic wave and the extract was centrifuged and filtered with a microporous membrane filter.Then the filtrate was transfer for HPLC analysis using an XTerra MS C18 column (4.6 mm×250 mm,5 μm).The mobile phase was a solution composed of methanol and 5 mmol/L tetrabutylammonium bromide (30∶70) with isocratic elution.The column temperature was set at 35 ℃.The flow rate was 1 mL/min and the wavelength of detection was at 285 nm.The quantification was carried out by external standard method.The experimental results indicated that the limits of quantification (LOQs) for urocanic acid and its ethyl ester were both 5 mg/kg.The mean recoveries at three spiked levels ranged from 80.1% to 103.8% with the relative standard deviations (RSD) between 1.2% and 6.9%.The suspected positive samples were subjected to further verification by LC-MS/MS.The method is accurate,rapid,sensitive,and can be used for the inspection of sunscreen cosmetics. References | Related Articles | Metrics