Table of Content

22 November 2017, Volume 47 Issue 11 Previous Issue    Next Issue

Basic research

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Surface activities and application performance of dodecyltrimethylammonium hexanoate-SDBS blend systems KE Hui-chun, GENG Tao, JIANG Ya-jie, ZHANG Chun-qiao, JU Hong-bin, WANG Ya-kui 2017, 47 (11):  603-606.  doi: 10.13218/j.cnki.csdc.2017.11.001 Abstract ( 278 )   PDF (834KB) ( 359 )   Surface activities and application performances of dodecyltrimethylammonium hexanoate (C12NC6) and sodium dodecyl benzene sulfonate (SDBS) blend systems were measured.Results show that the critical micelle concentration and surface tension of the blend systems are lower than each single component surfactant of the system;and the rate of diffusion adsorption of the blend systems is slower than that of each single component surfactant.The foam stability and wetting power of C12NC6 are improved by the addition of SDBS.As n(C12NC6)∶n(SDBS)＝1∶1,the critical micelle concentration and surface tension of the blend system achieve the lowest value,and the blend system displays better foam stability and wetting power,but the foaming power and emulsifying power of the blend system become worse. References | Related Articles | Metrics

Lecture of science and technology

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Synthesis and application of ionic liquid surfactants (Ⅺ) Interactions between bioactive molecules WU Lei, YANG Xu-zhao, ZOU Wen-yuan, XU Qing-jie, WANG Jun 2017, 47 (11):  607-611.  doi: 10.13218/j.cnki.csdc.2017.11.002 Abstract ( 335 )   PDF (2236KB) ( 319 )   Interactions between ionic liquid surfactants and bioactive molecules were summarized in three aspects.Hydrophobic ionic liquid surfactants can form inclusion complexes with β-cyclodextrin (β-CD) according to ratio of 1∶1,1∶2 or 2∶1;while hydrophilic ionic liquid surfactants cannot.The cmc and adsorption of ionic liquid surfactants at interface are affected by the inclusion complexes.The molecular structure and adsorption of protein at the interface between water and oil are affected by the interaction of ionic liquid surfactants with varied kinds of protein,such as bovine serum albumin,β-casein and lysozyme.The interactions between ionic liquid surfactants and DNA are caused by electrostatic attraction and hydrophobic action. References | Related Articles | Metrics

Development and application

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Response surface test optimization of removal of free sulfuric acid mixed in linear alkyl benzene sulfonic acid product XU Kun-hua, SHI Li-wen, GE Zan, JI Xiao-li, WANG Wen-de 2017, 47 (11):  612-615.  doi: 10.13218/j.cnki.csdc.2017.11.003 Abstract ( 286 )   PDF (1478KB) ( 305 )   Based upon results obtained from single factor experiments and in combination with response surface method,the eliminating technique of free sulfuric acid mixed in linear alkyl benzene sulfonic acid product was optimized.Performance of corrosion on metals caused by treated LABSA and untreated LABSA samples as well as their storage stability was compared.Results show that the optimum removal conditions are as follows:adding 1.25% Ca(OH)2,reacting at 69 ℃ for 3.4 h.Under the above conditions,the removal rate of free sulfuric acid can be near to 100%.When the free sulfuric acid is removed completely,the corrosion on steel is reduced obviously.The weight loss of upper part of the ST37-2 steel plate sample is reduced by 63.16%,whiles the middle part and lower parts is 71.88% and 67.82% respectively.After storage at 35 ℃ for 2 months,the color of treated LABSA is 29 Hazen,which indicates that no significant color change happens. References | Related Articles | Metrics

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Corrosion inhibition performance of chitosan and CTAB blend system for Q235 steel in acidic medium TANG Xu-dong, LIU Jin-yan 2017, 47 (11):  616-620.  doi: 10.13218/j.cnki.csdc.2017.11.004 Abstract ( 288 )   PDF (746KB) ( 258 )   Corrosion inhibition performance for Q235 steel in acidic medium with chitosan and chitosan/cetyltrimethylammonium bromide (CTAB) blend system was studied with three methods (weight loss,potentio-dynamic polarization and electrochemical ac-impedance spectroscopy (EIS)).Results indicated that the inhibition efficiency is good that achieves 85% when the chitosan with mass concentration of 0.1 g/L is used as inhibitor alone and under conditions of corrosion medium,1.0 mol/L HCl;temperature,30 ℃ for 24 h.After addition of CTAB,the corrosion efficiency is significantly enhanced.When the mass fraction of CTAB is 10%,the inhibition efficiency reaches 92% and even higher.Both chitosan and CTAB show the corrosion inhibition performance.Their surface adsorption mechanism is different.However,when they are blended together,there is synergic effect and the corrosion inhibition efficiency is enhanced. References | Related Articles | Metrics

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Properties of GTCC emulsions stabilized by regenerated wood pulp cellulose ZHOU Qian-qian, WANG Bi-jia, XU Hong, SUI Xiao-feng, SHI Bo-bo 2017, 47 (11):  621-626.  doi: 10.13218/j.cnki.csdc.2017.11.005 Abstract ( 419 )   PDF (5710KB) ( 281 )   The regenerated wood pulp cellulose (W-RC) was prepared with high purity wood pulp board as raw material and the product was characterized by TEM,FT-IR and XRD.Results indicate that W-RC belongs to the typical nanometer cellulose Ⅱ particles.O/W Pickering emulsion was prepared using caprylic/capric triglycerides (GTCC) as the oil phase and W-RC as the emulsifier.The Pickering emulsions were characterized by optical microscopy,fluorescence microscopy,FE-SEM and rheometer.Results show that W-RC is adsorbed at the oil-water interface and a three-dimensional network structure is formed on and in between oily microspheres from fluorescence microscopy and FE-SEM image.The rheology study illustrates that W-RC and the resulting emulsions feature the typical shear-thinning property of emulsions.W-RC displays excellent emulsifying properties,and a stable emulsion can be obtained when the W-RC mass fraction is 0.6% and even if the dispersed phase volume fraction is as high as 60%. References | Related Articles | Metrics

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Preparation of modified montmorillonite and its function for stabilizing Pickering emulsions in cooperation with alginic acid derivative HU De-ping, ZHANG Xue-qin, DAI Zi-hao, CHEN Xiu-qiong, YAN Hui-qiong, LIN Qiang 2017, 47 (11):  627-632.  doi: 10.13218/j.cnki.csdc.2017.11.006 Abstract ( 290 )   PDF (3862KB) ( 393 )   The intercalating modified montmorillonite (CMMT) was prepared by wet type ball mill process with montmorillonite (MMT) as basic material and hexadecyltrimethylammonium bromide (CTAB) as hydrophobic modifying agent.Then the product CMMT was characterized by SEM,zeta potential analyzer,FT-IR,XRD,TEM and TGA.Furthermore,stable Pickering emulsions were prepared by CMMT in cooperation with amphiphilic alginic acid derivative (Ugi-Alg),and then the effect of the CMMT that modified with varied amount of CTAB on the stability of Pickering emulsion was investigated.Experimental results show that the CTAB is intercalated into the lamella interlayers of MMT micro-particulates by the mechanical action of the ball mill.Ugi-Alg is adsorbed on surface of the CMMT,that enhancing the aggregation capacity of the CMMT particulates at the oil-water interface.When the addition amount of CTAB is 1.0CEC,the charge of CMMT particulates is at the lowest while the emulsion stability is the highest. References | Related Articles | Metrics

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Reconstruction of 3D skin model and its application in evaluation the efficacy of cosmetic raw materials to be used as active ingredients SONG Xiao-jie, ZHOU Chun-xia, WU Yue 2017, 47 (11):  633-636.  doi: 10.13218/j.cnki.csdc.2017.11.007 Abstract ( 537 )   PDF (3993KB) ( 360 )   Via the use of Mimedisc® as a scaffold,the normal human dermal fibroblasts were first seeding into the scaffold to form a dermal equivalent after 3 weeks;and then seeding normal human epidermal keratinocytes on it,followed by immersion and air-liquid inter-phase culture stage,to finally form a 3D sponge matrix skin model which has a very similar structure of normal human skin (NHS).The results of Masson staining,immuno-histochemical (IHC) and immuno-fluorescence (IF) staining show that this skin model displays a very similar structure and key protein expression of NHS.Meanwhile,this model was used as a tool to investigate the effect of Himalaya cedar extract on Dermal-Epidermal Junction (DEJ) in vitro.Results show that the Himalayan cedar extract can significantly increase the thickness of the epidermis,thus increase the barrier capacity of the skin to resist external environment.Further,the Himalaya cedar extract can promote the expression of Laminin 5 and Collagen VII of DEJ.The expression of the Laminin 5 and Collagen VII increases 20% and 47% respectively.So the Himalaya cedar extract displays the potential to be applied in development of anti-aging cosmetics. References | Related Articles | Metrics

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Preparation and properties of schizophyllan polysaccharide phosphorylated derivative FENG Xiao-ling, FANG Zhao-hua, LIU Jian-xin, SUN Yong, ZHOU Li-wu 2017, 47 (11):  637-640.  doi: 10.13218/j.cnki.csdc.2017.11.008 Abstract ( 316 )   PDF (751KB) ( 258 )   Schizophyllan polysaccharide phosphorylated derivative was prepared from schizophyllan polysaccharide by modification with sodium tripolyphosphate and sodium trimetaphosphate.The effects of mass ratio of reactants, reaction temperature and reaction time on the degree of substitution were examined by single factor experiments.Experimental results show that the better conditions for the preparation are:mass ratio,m(sodium tripolyphosphate + sodium trimetaphosphate,with equal molar blend)∶m(schizophyllan polysaccharide) = 2∶1;reaction temperature,60 ℃;and reaction time,3 h.Under these conditions,the degree of substitution of phosphorylation achieves 0.052.The solubility,antioxidantion activity and moisturizing capacity of schizophyllan polysaccharide before and after phosphorylation were studied.Results show that the solubility and moisturizing capacity of schizophyllan polysaccharide are greatly improved by phosphorylation modification.The phosphorylation modification displays little effectiveness on improving antioxidation activity of the schizophyllan polysaccharide. References | Related Articles | Metrics

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Preparation of SBA-15 and its catalytic performance in synthesis of cyclohexanone ethylene ketal XIANG Shi-yin, LI Zhi-peng, YANG Shui-jin 2017, 47 (11):  641-644.  doi: 10.13218/j.cnki.csdc.2017.11.009 Abstract ( 375 )   PDF (1221KB) ( 297 )   Metal ions were grafted into the pores of SBA-15 and the grafted product was examined for using as catalyst in synthesis of cyclohexanone ethylene ketal.Structure of the catalyst was characterized by FT-IR,SEM and XRD.And the characterizing results show that the catalyst prepared is the targeted one.Then,experiment for the synthesis of cyclohexanone ethylene ketal was carried out with various catalysts.Experimental results show that as dosage of cyclohexanone is fixed at 0.2 mol;molar ratio of glycol to cyclohexanone is 1.7∶1;dosage of the catalyst is 1.2% (mass) of the reactants;volume of water stripping agent,cyclohexane is 14 mL;reaction time is 100 min;catalyst Co/SBA-15 displays the best result that the yield of cyclohexanone ethylene ketal achieves 89.8%. References | Related Articles | Metrics

Reviews

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Research progress on synthesis of cardanol-based surfactants GE Zan, SHI Li-wen, DAI Yong-chang, HUA Wen-gao, LIU Rong 2017, 47 (11):  645-650.  doi: 10.13218/j.cnki.csdc.2017.11.010 Abstract ( 426 )   PDF (871KB) ( 490 )   The progress in the research work field for cardanol-based surfactants were described,which focused on the development of synthesis methods for production as well as properties of the cardanol-based surfactants,covering sulfonates,sulfates,carboxylates and cardanol polyoxyethylene ethers were summarized separately.In addition to their excellent performance,the green source of raw materials used for producing cardanol-based surfactants is more consistent with the worldwide development trend. References | Related Articles | Metrics

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Progress in research work field for applications of modified starch in cosmetics WANG Qiu-li, GAO He-yi, WANG Li-dan, WANG Rui-hang, HUANG Li-xin 2017, 47 (11):  651-654.  doi: 10.13218/j.cnki.csdc.2017.11.011 Abstract ( 505 )   PDF (825KB) ( 463 )   The classifications of modified starch were briefed.Status with respect to development and applications of modified starch in conventional cosmetics of varied dose forms,functional cosmetics and new cosmetics in China domestic and worldwide were reviewed.Meanwhile,the related technical problems were discussed and prospected. References | Related Articles | Metrics

Analytical methods and testing

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Detection of content of fatty acids in amino acid-based surfactants by high performance liquid chromatography LI Ze-yong, CHEN Lei, LIU Kang, TANG Zhong-biao, ZHANG Li-ping 2017, 47 (11):  655-658.  doi: 10.13218/j.cnki.csdc.2017.11.012 Abstract ( 467 )   PDF (793KB) ( 382 )   A high performance liquid chromatography (HPLC) method for the detection of content of fatty acids in amino acid-based surfactants was established.Separation is performed by a Welch Ultimate AQ-C18 column (250 mm×4.6 mm,5 μm) with acetonitrile-0.1% formic acid aqueous solution as the mobile phase for gradient elution.After acidification and derivatization,the sample is detected with a UV and visible light wavelength variable detector (VWD).Results show that,all linearity ranges of the fatty acids are within 5-500 mg/L with the correlation coefficients greater than 0.999.The spiked recoveries vary from 93.2%-103.0%.The limits of determination and quantification are 0.03% and 0.1%,respectively.The method is simple,time-saving and precise,which may be suitable for fatty acids determination in amino acid-based surfactants. References | Related Articles | Metrics

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Determination of collagen content in snake skin by HPLC-ELSD DING Rui-min, ZHOU Hua-feng, LI Yun-gao, CAI Heng, DUAN Ming-xing, JIN Qing-xian 2017, 47 (11):  659-662.  doi: 10.13218/j.cnki.csdc.2017.11.013 Abstract ( 368 )   PDF (787KB) ( 270 )   A high performance liquid chromatography-evaporative light scattering detection (HPLC-ELSD) method for determination of content of collagen in snake skin was established.After the collagen in snake skin sample was hydrolyzed with hydrochloric acid,separation was performed by a Thermo Hypersil Gold C18(250 mm×4.6 mm,5 μm) chromatographic column and acetonitrile (containing 0.2% formic acid,mobile phase A)-water (containing 0.2% formic acid,mobile phase B) as the mobile phase were used for gradient elution.The elution time is 15 min.The column temperature is 30 ℃;and the flow rate is 0.4 mL/min.The ELSD detector parameters are as follows:nebulization temperature,85 ℃;evaporation temperature,85 ℃;carrier gas,N2;air flow of the evaporator,1.2 L/min.The injection volume of the sample is 10 μL.Under these chromatographic conditions,the linearity range of hydroxyproline is 10 - 100 mg/L,R2 = 0.999 6;the lowest limit of detection is 5.56 mg/L,and the lowest limit of quantification is 10 mg/L.The average recovery rate of snake skin collagen is 94.53%;the RSD is 2.15%;and the average of the mass fraction of collagen in snake skin is 40.21%. References | Related Articles | Metrics