Table of Content

22 August 2014, Volume 44 Issue 8 Previous Issue    Next Issue

Basic research

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Dynamic surface tension of trisiloxane ionic liquid aqueous solution LI En-ze, DU Zhi-ping, LI Ping, WANG Guo-yong 2014, 44 (8):  421-425.  doi: 10.13218/j.cnki.csdc.2014.08.094 Abstract ( 313 )   PDF (916KB) ( 624 )   Dynamic surface tension (DST) of trisiloxanepyridinium ionic liquid and trisiloxaneimidazolium ionic liquid aqueous solution were measured with bubble pressure tensiometer.Effects of concentration and temperature on DST were investigated in detail.Data obtained were analyzed in accordance with Word-Tordai equation,and the diffusion coefficients for ionic liquid molecular adsorption in initial time stage and long time stage under different conditions were figured out respectively.The results indicated that the adsorption mechanism of both above said two kinds of ionic liquid belongs to mixed diffusion-kinetic controlled adsorption. References | Related Articles | Metrics

Lecture of science and technology

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Performance and applications of surfactants (Ⅷ) Surfactant wormlike micelles and their applications ZHAO Li, TAN Ting-ting, XU Bao-cai 2014, 44 (8):  426-431.  doi: 10.13218/j.cnki.csdc.2014.08.095 Abstract ( 379 )   PDF (1116KB) ( 484 )   Structures and formation of surfactant wormlike micelles were presented,and then most common surfactant wormlike micelle systems were described.The basic properties and conventional measures used in research work with respect to wormlike micelle systems were focused.Finally,the application of surfactant wormlike micelles in field of crude oil recovery was summarized. References | Related Articles | Metrics

Development and application

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Preparation and performance of disodium mono (alkyl polyoxyethylene ether) glucosidyl citrate BAI Liang, YANG Xiu-quan, ZHANG Jun, ZHOU Yuan 2014, 44 (8):  432-435.  doi: 10.13218/j.cnki.csdc.2014.08.096 Abstract ( 320 )   PDF (760KB) ( 349 )   Via indirect esterification,citric anhydride was prepared with citric acid and acetic anhydride as starting materials,and then the citric anhydride was reacted with alkyl polyoxyethylene ether glucoside (containing excess of unreacted alkyl polyoxyethylene ether) at conditions as mole ratio 1:1 and temperature of 90 ℃ for 2 h to get mono (alkyl polyethethylene ether) glucosidyl citrate.Conversion of the esterification achieves 96% and higher.Then the mono (alkyl polyethylene ether) glucosidyl citrate was neutralized with NaOH to get the product disodium mono (alkyl polyoxyethylene ether) glucosidyl citrate (simply expressed as MAEG-EC-X-Na).Chemical structure of MAEG-EC-X-Na was characterized by IR.Physicochemical properties of the product were measured.Results showed that:as the content of the alkyl polyoxyethylene ether in the raw material increases,the cmc value,foaming power and foam stability of MAEG-EC-X-Na decreases,while γcmc does not change significantly;NaCl has rather big influence on viscosity of blend systems composed of MAEG-EC-70-Na,AES and amine oxide. References | Related Articles | Metrics

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Preparation and performance of sodium iso-octanol sulfate by SO3 gas phase sulfation method ZHAO Jian-hong, CHEN Wu-yuan 2014, 44 (8):  436-438.  doi: 10.13218/j.cnki.csdc.2014.08.097 Abstract ( 282 )   PDF (760KB) ( 475 )   Iso-octanol was sulfated by SO3 gas in a falling-film sulfonation/sulfation reactor,and the intermediate was neutralized by NaOH solution to get the product sodium iso-octanol sulfate.Structure of the product was characterized by means of FTIR.Factors that influencing the product yield were investigated and optimum reaction conditions were identified by orthogonal designed experiment as:dosage of iso-octanol 13.9 kg·h-1,volume fraction of SO3 gas 3%,reactor jacket cooling water temperature 20 ℃,reaction temperature of neutralization 50 ℃.Performance indices,such as surface activity,wetting power and foaming performance et al.of the end product are basically coincide with that of product purchased from market that was prepared by aminosulfonic acid method. References | Related Articles | Metrics

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Study on detergency of surfactant ethoxylated rosin ester CHE Wen-cheng, DONG Li, CHEN Shao-feng 2014, 44 (8):  439-442.  doi: 10.13218/j.cnki.csdc.2014.08.098 Abstract ( 283 )   PDF (728KB) ( 344 )   Surfactant ethoxylated rosin ester was blended with standard laundry liquid detergent,LAS and STPP and their detergency as well as anti-re-precipitation performance were investigated.Experiment results indicated that the ethoxylated rosin ester surfactant shows strong detergency and anti-re-precipitation effect,which enables itself to be used alone as detergent as well as can be blended with LAS and STPP and shows good compatibility and synergic effect.The sample of ethoxylated rosin ester surfactant shows its best effect when blended with standard laundry liquid detergent at mass fraction of 20%. References | Related Articles | Metrics

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Optimization of the process for preparation of sodium alginate microspheres encapsulating L-ascorbic acid by response surface method WANG Ting-ting, CAO Guang-qun, DONG Wei 2014, 44 (8):  443-447.  doi: 10.13218/j.cnki.csdc.2014.08.099 Abstract ( 294 )   PDF (1508KB) ( 346 )   Sodium alginate (SA) microspheres that are used for L-ascorbic acid encapsulation were prepared by emulsification/internal gelation method.The optimized preparation conditions were studied by combination of single factor experiment and response surface method with encapsulation extent (EE) and particle sizes as indices and the conditions were identified as:dosage of Span 80,2% (mass of the oil phase material);volume fraction of water,30%;stirring speed,400 r·min-1;mass concentration of SA,18.80 g·L-1;mole ratio,n(acetic acid)/n(CaCO3)=3.29;mass ratio,m(Ca)/m(SA)=0.071 6.Under these conditions,the EE of SA microspheres achieves 63.83%.To improve the EE further,microspheres were prepared using SA/N,O-carboxymethyl chitosan (NOCC) as wall materials under the optimized preparation conditions.The EE of SA/NOCC microspheres achieves 77.08%.The scanning electron microscope revealed that microspheres prepared with SA/NOCC have obviously less pores on the surface than that prepared with SA. References | Related Articles | Metrics

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Studies on sunscreen efficacy of chlorogenic acid in Flos lonicerae ZHANG Ying, LIN Feng, RAO Chang-quan, MO Wei-huan 2014, 44 (8):  448-451.  doi: 10.13218/j.cnki.csdc.2014.08.100 Abstract ( 444 )   PDF (803KB) ( 664 )   UV absorption performance,light stability and pH stability of chlorogenic acid in Flos lonicerae as well as sunscreen performance of its formulated product were investigated.Results showed that UV absorption spectrum of the Flos lonicerae extract ranges between 280~350 nm,with good UV absorbing performance.Chlorogenic acid has photochemical activity that results in photodegradation reaction.Retention ratio of the chlorogenic acid in the Flos lonicerae extract solution decreases as the irradiation time increases,with a retention ratio of 85.6% after an irradiation time of 8 h.The chlorogenic acid is rather stable when pH is a range of 3~7.Vitro evaluation for SPF of sunscreen cream formulated with Flos lonicerae extract depends on content of chlorogenic acid in the extract.As the mass fraction of chlorogenic acid in the extract achieves 2.15%,SPF of sunscreen cream formulated with the extract achieves 15. References | Related Articles | Metrics

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Study of dioscin extraction based on surfactant solubilization technology LI Xiang, SHI Chun-lan, WANG Li-ping, ZHANG bin 2014, 44 (8):  452-455.  doi: 10.13218/j.cnki.csdc.2014.08.101 Abstract ( 251 )   PDF (808KB) ( 429 )   Surfactant solubilization technology was adopted for extraction of dioscin with assistance of ultrasonic wave action.Influence of kinds of the surfactant,as well as carbon chain length,hydrophilic lipophilic balance (HLB) value and critical micelle concentration (cmc) of the surfactant on effectiveness of dioscin extraction were investigated.Results showed that the anionic surfactant with carbon chain length of 12,HLB value of higher than 15 and smaller cmc value displays better extraction yield of dioscin.Sodium dodecyl sulfate aqueous solution with concentration of 2.58×10-2 mol·L-1 is recommended as the proper extraction solvent;the extraction yield of dioscin achieves 9.51%. References | Related Articles | Metrics

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Extraction technology of Tricholoma matsutake Sing and evaluation for its safety and efficacy on human body DENG Ying-mei, ZHAO Hua 2014, 44 (8):  456-459.  doi: 10.13218/j.cnki.csdc.2014.08.102 Abstract ( 433 )   PDF (747KB) ( 304 )   Extraction technology of Tricholoma matsutake Sing was optimized and the content of its total flavonoids,total polyphenols and total polysaccharides were determined.Results showed that,under extraction conditions as: solvent,ethanol aqueous solution with volumetric concentration 70%;solid-liquid ratio,1:20;extraction time,2 h;its inhibition efficacy on tyrosinase achieves 59.71%.Content of total flavonoids,total polyphenols and total polysaccharides in the Tricholoma matsutake Sing were determined as 0.720 mg·g-1,0.026 mg·g-1 and 11.84% respectively.Safety tests results showed that,as the addition amount of the Tricholoma matsutake Sing extract is not more than 4%,hemolysis of blood red cell will be not higher than 4.31%.Patch test results of the cosmetic cream product containing Tricholoma matsutake Sing shows negative.Via the whitening efficacy tests,the cosmetic cream product containing the Tricholoma matsutake Sing extract shows efficacy for inhibition of melanin pigmentation as well as improvement of brightness and whitening of human body skin. References | Related Articles | Metrics

Reviews

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Progress in research work with respect to Pickering emulsion LU Jia, TIAN Xiao-xiao, JIN Ye-ling, CHEN Jing, DING Shi-jie 2014, 44 (8):  460-466.  doi: 10.13218/j.cnki.csdc.2014.08.103 Abstract ( 676 )   PDF (1480KB) ( 1257 )   Stabilization mechanisms of Pickering emulsion,including mechanical barrier mechanism and three-dimensional viscoelastic particles network mechanism,were introduced.The current research work status about Pickering emulsion covering emulsion stabilized by spherical particles,emulsion stabilized by layered particles as well as various environmental stimuli (such as pH,temperature,electric fields,and magnetic fields et al.) responding type emulsion,were summarized.Meanwhile,the concerning applications of Pickering emulsion such as emulsion polymerization,functional material preparation,drug release,catalyst separation and recycling,were described.At last,the development trend of Pickering emulsion was prospected. References | Related Articles | Metrics

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Application and research progress of rheology in the field of cosmetics JIA Hong-jiao, LI Fang-fang, MIAO Yu-lian, ZHANG Wan-ping 2014, 44 (8):  467-471.  doi: 10.13218/j.cnki.csdc.2014.08.104 Abstract ( 672 )   PDF (764KB) ( 1074 )   Definition for cosmetic rheology was briefed,and application of rheological principles for identification of fluid type,production,stability investigation and skin feel evaluation of cosmetics was summarized.Progress in the field of research work with respect to rheological principles in cosmetic systems such as surfactant formulations as well as emulsions and gels was expounded.It was pointed out that connection of micro-structure and product characteristics of cosmetics via rheological principles will be the trend in the future development process of cosmetic industry. References | Related Articles | Metrics

Analytical methods and testing

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Determination of ten kinds of phthalic acid ester in cosmetics by LC-MS BAI Ya-min, YANG Xiao-shan, MAO Qing, JIANG Sheng, QIN Jian 2014, 44 (8):  472-475.  doi: 10.13218/j.cnki.csdc.2014.08.105 Abstract ( 239 )   PDF (749KB) ( 358 )   A method was established to determine residual content of phthalic acid esters (PAEs) in cosmetics.Samples were dissolved and then extracted under assistance of ultrasonic wave.Detection was performed using multiple reaction monitoring mode.The quantification was obtained utilizing the external standard method.Recoveries of residual content PAEs,with spike of ten times of the detection limit were 76.2%-95.2%,and the RSDs of the method were 4.4%-8.9%.The method can be applied to determine ten kinds of PAE in cosmetics simultaneously. References | Related Articles | Metrics

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Simultaneous determination of lead,mercury,arsenic and cadmium in cosmetics by inductively coupled plasma mass spectrometry TONG Xiao-bo, DUAN Yan-jie, SUN Xiao-juan, YUAN Bo 2014, 44 (8):  476-478.  doi: 10.13218/j.cnki.csdc.2014.08.106 Abstract ( 290 )   PDF (718KB) ( 423 )   A method for simultaneous determination of lead,mercury,arsenic and cadmium in cosmetics by inductively coupled plasma mass spectrometry (ICP-MS) was established.Indium was used as internal standard element.Samples were digested in a closed microwave oven.Contents of lead,mercury,arsenic and cadmium were simultaneously analyzed by ICP-MS,and the results were compared with that obtained from the national official method.The calibration curves for four elements showed good linearity with all correlative coefficients of 0.999 7;the limits of detection (LOD) were 0.006~0.1 μg·L-1;the relative standard deviations of repeatability experiments of samples (n=6) were between 0.65% and 4.82%;the spiked recoveries were between 94.1% and 108.6%.Methodological study showed that the results obtained from this method were basically consistent with that from the national official method. References | Related Articles | Metrics