Table of Content

22 November 2019, Volume 49 Issue 11 Previous Issue    Next Issue

Basic research

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Study on redox response behaviors of spontaneous vesicles formed by anionic/cationic surfactants LI Ying,LIU Lian,LIU Xue-feng 2019, 49 (11):  699-704.  doi: 10.3969/j.issn.1001-1803.2019.11.001 Abstract ( 324 )   HTML ( 89 )   PDF (1582KB) ( 376 )   Spontaneous vesicles were formed by the combination of sodium dodecylselanylpropyl sulfate （SDSePS）, a redox-responsive anionic surfactant, and a cationic surfactant dodecyltrimethylammonium bromide （DTAB）. Then the redox reversible response behavior of the vesicles was explored. The results show that, under the action of H2O2, the divalent selenide group （-Se-） in the SDSePS can be oxidized to a tetravalent selenium sulfoxide group （-Se=O）, and the spontaneous vesicles formed by SDSePS/DTAB are disintegrated into spherical micelles; and then under the action of Na2SO3, the tetravalent selenium sulfoxide group is reduced to a divalent selenide group, and the spontaneous vesicles formed by SDSePS/DTAB are regenerated; under the alternating action of H2O2 and Na2SO3, the spontaneous vesicles formed by SDSePS/DTAB can switch between the two states of micelles and vesicles over 10 times at least. The average radius of the regenerated vesicles formed by SDSePS/DTAB remained in the range of 115-130 nm. Figures and Tables | References | Related Articles | Metrics

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Study on rheological properties and melting sensation of O/W cream JIANG Tong,ZHANG Chen,ZHANG Zhi-wei,ZHANG Wan-ping,FANG Bo 2019, 49 (11):  705-710.  doi: 10.3969/j.issn.1001-1803.2019.11.002 Abstract ( 308 )   HTML ( 14 )   PDF (2168KB) ( 406 )   The rheological properties of the O/W cream were studied. The flow curves were fitted in Cross equation. The results indicate that with the increase of the melting degree index, the first Newtonian viscosity, the hysteresis loop’s area and complex modulus get smaller. lg η0 , S and lg G* show good linear relationship with melting degree index. Meanwhile, the rheological properties of O/W cream were investigated in large amplitude oscillatory shear （LAOS） flow field. The results show that with the increase of the melting degree index, the amplitude of the elastic Lissajous stress response curve get smaller, as well as GM and GL. Figures and Tables | References | Related Articles | Metrics

Lecture of science and technology

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Interactions between surfactants and nanoparticles and the construction of smart systems（V） Interactions between like-charged nanoparticles and ionic surfactants（i） Construction of novel emulsions using ultra-low concentration of nanoparticles/surfactants and their stabilization mechanism ZHANG Wan-qing,XU Mao-dong,JIANG Jian-zhong,CUI Zheng-gang 2019, 49 (11):  711-720.  doi: 10.3969/j.issn.1001-1803.2019.11.003 Abstract ( 420 )   HTML ( 7 )   PDF (2787KB) ( 757 )   By means of reversible hydrophobization of inorganic nanoparticles with the oppositely charged ionic surfactants in aqueous media, smart dispersion systems such as switchable or stimuli-responsible Pickering emulsions/foams with various triggers can be constructed. Surprisingly, like-charged inorganic nanoparticles and ionic surfactants can also co-stabilize O/W emulsions, in which the concentrations of both particles and surfactants required are extremely low, i.e., the minimum concentration required can be as low as 0.001% and 0.001cmc, respectively. It is found that trace amount of surfactants adsorb at oil/water interface controlling droplet size, whereas the nanoparticles do not adsorb at oil/water interface but distribute in aqueous lamellae of the continuous phase. The O/W emulsions co-stabilized by like-charged nanoparticles and ionic surfactants are called novel emulsions since their stabilization mechanism can not be well interpreted by the classic DLVO, the steric and the Pickering stabilization theories. This lecture will discuss the formation, characterization, universality and preliminary stabilization mechanism of the novel O/W emulsions. Figures and Tables | References | Related Articles | Metrics

Development and application

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Study on the phase behaviors of the mixtures of narrow-distribution sodium fatty alcohol ether sulfate and tetradecyltrimethylammonium bromide WANG Xin-gang,YANG Xiao-yi,SUN Yong-qiang,GUO Chao-hua,LI Ping,LI Jian-bo 2019, 49 (11):  721-726.  doi: 10.3969/j.issn.1001-1803.2019.11.004 Abstract ( 283 )   HTML ( 3 )   PDF (1137KB) ( 436 )   The phase behaviors of the mixtures of tetradecyltrimethylammonium bromide （TTAB） and narrow-distribution sodium fatty alcohol ether sulfate （N-AEnS） containing different number of oxyethylene units（EO） （n） were investigated, as well as the mechanism of the formation of aqueous two-phase systems （ASTP） of N-AE5S/TTAB. The phase behaviors of N-AEnS/TTAB （n = 3, 5, 7, 9） with different molar ratios and concentrations were studied by static surface tension, macroscopic phase behavior and microscopic aggregate morphology. The results showed that with the increase of EO number, the mixtures of N-AEnS/TTAB appear to be milky white liquid （n = 3）, phase separation （n = 5） , bluish transparent liquid （n = 7） and colourless transparent liquid （n = 9） . Corresponding microscopic morphologies are spherical aggregates （n = 3） , rod-shaped aggregates （n = 5） , spherical aggregates （n = 7） , and no aggregates in N-AE9S/TTAB. Electrostatic interaction and hydrophobic interaction play major roles in the formation of ASTP of N-AE5S/TTAB. Figures and Tables | References | Related Articles | Metrics

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Preparation and properties of cationic phytoglycogen ZHANG Rui-qi,YANG Cheng 2019, 49 (11):  727-732.  doi: 10.3969/j.issn.1001-1803.2019.11.005 Abstract ( 274 )   HTML ( 15 )   PDF (1097KB) ( 463 )   2, 3-epoxypropyltrimethylammonium chloride（GTA） was used as a quaternization agent to prepare the cationic hyperbranched dextran phytoglycogen（PG） through quaternization. The optimized conditions were obtained by single-factor experimental experiment as follows: the mass fraction of sodium hydroxide was 0.3%, the reaction temperature was（50±2） ℃, the reaction time was 2 h, and the mass ratio of GTA to PG was 1.2:1. In such condition, the degree of substitution of cationic phytoglycogen（PG-GTA） could reach 0.294. The flocculation of the interaction between PG-GTA and the anionic surfactant in the shampoo was studied. The results show that the shampoo has a good flocculation effect when diluted to 5 times. On this basis, the combing performance of the shampoo added with PG-GTA was studied, and the combing work was reduced by 31.29% compared with the shampoo without PG-GTA. Figures and Tables | References | Related Articles | Metrics

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Preparation and photocatalytic activity of carbon-quantum-dot-modified nano-TiO2 YIN Yan-ji,TAI Xiu-mei,DU Zhi-ping 2019, 49 (11):  733-736.  doi: 10.3969/j.issn.1001-1803.2019.11.006 Abstract ( 358 )   HTML ( 9 )   PDF (1190KB) ( 498 )   Ionic-liquid-modified carbon quantum dots （L-CQDs） were prepared by one-pot pyrolysis using citric acid as carbon source and 1-aminopropyl-3-methyl-imidazolium bromide as surface modifier. TiO2 nanoparticles were loaded with L-GQDs by one-step hydrothermal method. Using a solution of nonylphenol polyoxyethylene ether （TX-10） as the simulated wastewater, the photocatalytic performance of L-CQDs/TiO2 composite photocatalyst was studied. The characterization results are proved by FT-IR and high-resolution transmission electron microscopy （HRTEM） that L-CQDs are loaded onto the surface of TiO2 nanoparticles. The UV-visible absorption spectrum show that the absorption of L-GQDs/TiO2 in the visible region is significantly enhanced compared with TiO2 nanoparticles. The results of photocatalysis show that the degradation rate of 3% L-CQDs/TiO2 to 0.05 g/L TX-10 solution could reach 83.5% under illumination of Xenon lamp for 3 h, which is 26.6% higher than that of TiO2 nanoparticles. The photocatalytic activity of the composite photocatalyst remain unchanged after repeated use for 5 times. Figures and Tables | References | Related Articles | Metrics

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Study of anti-inflammatory efficacy of a herb composite extract LU Yi-na 2019, 49 (11):  737-741.  doi: 10.3969/j.issn.1001-1803.2019.11.007 Abstract ( 566 )   HTML ( 38 )   PDF (972KB) ( 590 )   A herb composite extract VGP which consisted of Vitex trifolia fruit, Gentiana scabra, and Polygonum multiflorum root was prepared and its anti-inflammatory effect was studied by several methods. The results showed that on the model of NHEK and THP1 cell inflammation induced by Malassezia furfur and H2O2, VGP could inhibit the expressions of interleukin 6 （IL-6）, prostaglandin E2 （PGE-2）, monocyte chemoattractant protein 1 （MCP-1） and interleukin 1β （IL-1β） in a dosage-dependent manner in the concentration range of 0.01%-0.125%. In the human skin injury model caused by high concentration of H2O2, VGP at the concentrations of 0.5% and 2% could reduce the formation of erythema and blisters and relieve pruritus. Therefore, as a natural active ingredient VGP could play a role in scalp care and skin care by targeting inflammation. Figures and Tables | References | Related Articles | Metrics

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Preparation of ceramide II liposome and its application in cosmetics WANG Li,LIU Rui-xue,LENG Qun-ying,BI Fan-xing 2019, 49 (11):  742-747.  doi: 10.3969/j.issn.1001-1803.2019.11.008 Abstract ( 772 )   HTML ( 52 )   PDF (957KB) ( 1042 )   The liposome with high content （10%） of ceramide Ⅱ was prepared by the homogenization technique. A large number of Maltese Cross liquid crystal structures which were uniform in particle size were observed under a polarizing microscope. The ceramide Ⅱ liposomes were smooth, soft and water-soluble, with suitable viscosity and good stability. It could be used in cosmetics by simply stirring, which solved the problems of poor water solubility and easy crystallization and precipitation for ceramide. Human-skin test results showed that the TEWLvalue （transepidermal water loss） of the subjects could recover 85% with the cream containing 1% ceramide Ⅱ liposome （which contained 10% ceramide Ⅱ） in two hours, and the skin moisture content could be increased by 39.58% in an hour, which indicated that it had good repairing ability for skin barrier. Figures and Tables | References | Related Articles | Metrics

Reviews

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Application of surfactant in the extraction of activeconstituents from plants LI Lu-jun,PENG Sheng,HUO Yan-ping,WANG Zhi-hong,YANG Qiu-ling,WANG Xiang,PENG Mi-jun 2019, 49 (11):  748-752.  doi: 10.3969/j.issn.1001-1803.2019.11.009 Abstract ( 473 )   HTML ( 27 )   PDF (875KB) ( 517 )   The application of surfactants in the extraction of plant active constituents was reviewed. The application of surfactants in auxiliary extraction, microemulsion system extraction and cloud point extraction of plant active constituents and its principle and characteristics were introduced. The application of surfactants in the extraction of plant active constituents was prospected. Figures and Tables | References | Related Articles | Metrics

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Research progress on water and sweat resistant sunscreens CAO Gao,TANG Xin-yi,YANG Yi,XU Jian,JIN Jia-hua,DING Li-qin 2019, 49 (11):  753-759.  doi: 10.3969/j.issn.1001-1803.2019.11.010 Abstract ( 636 )   HTML ( 36 )   PDF (1029KB) ( 834 )   The in vivo and in vitro evaluation methods for water and sweat resistance properties of sunscreens were summarized. The methods to improve water and sweat resistance properties of sunscreens were presented from the perspectives of formulasystems, emulsifiers, film-forming agents, sunscreen agents, and interaction forces. Additionally, the problems and development directions that need to be noticed when developing water and sweat resistant sunscreens were pointed out. Figures and Tables | References | Related Articles | Metrics

Analytical methods and testing

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Determination of tranexamic acid in whitening cosmetics by high performance liquid chromatography DAI Jing,GAO Jia-min,CAO Jin,WANG Gang-li 2019, 49 (11):  760-763.  doi: 10.3969/j.issn.1001-1803.2019.11.011 Abstract ( 634 )   HTML ( 13 )   PDF (908KB) ( 851 )   A high performance liquid chromatography （HPLC） method for the determination of tranexamic acid in whitening cosmetics was established. The tranexamic acid in cosmetic samples was extracted directly with 5% methanol solution. The separation was performed on a Shiseido CAPCELL PAK C18 UG120 column （4.6 mm×250 mm×5 μm）, with the mobile phase of methanol and 0.05 mol/L KH2PO4-0.2% H3PO4 solution. The flow rate was 1.0 mL/min and detection wavelength was 210 nm. The detection results show good linearity within the range of 5-100 mg/L （r>0.999）. The limit of detection （LOD） is 10.7-22.2 μg/g and the limit of quantitation （LOQ） is 28.9-48.0 μg/g in the cosmetics matrix. The recoveries range from 95.23% to 110.40%, and the RSD range is 1.24%-3.59%（n=6）. The intraday stability is good, and the peak area RSD value is 0.026% within 24 h. The method is simple and reliable, and can be used for the determination of tranexamic acid in whitening cosmetics. Figures and Tables | References | Related Articles | Metrics

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Simultaneous determination of arsenic, antimony, lead and mercury in cosmetics by microwave digestion-atomic fluorescence spectrometry ZHOU Xia,WANG Yan-hua,JIANG Xin-jie,CHANG Shu,SUN Fen-fang 2019, 49 (11):  764-768.  doi: 10.3969/j.issn.1001-1803.2019.11.012 Abstract ( 328 )   HTML ( 5 )   PDF (956KB) ( 796 )   A method for the simultaneous determination of arsenic, antimony, lead and mercury in cosmetics by microwave digestion atomic fluorescence spectrometry was established. After the sample solution was decomposed by microwave digester, acid was removed at 120 ℃ on the pretreatment heater. And then arsenic, antimony, lead and mercury were simultaneous determined by hydride generation dual channel atomic fluorescence spectrometer with 1.0% nitric acid as carrier and 5.0% thiourea-ascorbic acid as reductant. The results show that the linearity of arsenic, antimony, lead and mercury is good in the corresponding concentration range, and the correlation coefficients R 2 are 0.999 3, 0.998 4, 0.997 3 and 0.999 7, respectively. The recovery of four elements is 91.7%-101.9%. This method has the advantages of simple operation, fast speed, wide linear range and strong applicability. Figures and Tables | References | Related Articles | Metrics