Table of Content

22 January 2017, Volume 47 Issue 1 Previous Issue    Next Issue

Basic research

Select

Self-assembly and photo regulation of a supra-amphiphile based on host-guest interaction HAO Shan-shan, ZHAI Qiao-ya, ZHAO Li, XU Bao-cai 2017, 47 (1):  1-6.  doi: 10.13218/j.cnki.csdc.2017.01.001 Abstract ( 290 )   PDF (2808KB) ( 335 )   A molecule containing azobenzene and cholesterol moieties (AzoChol) was synthesized,which forms supra-amphiphile with α-cyclodextrin (α-CD) based on host-guest interaction between azo group and α-CD.The supra-amphiphile AzoChol/α-CD self-assembled into vesicles in water,demonstrated by transmission electron microscopy (TEM),atomic force microscope (AFM) and confocal laser scanning microscope (CLSM).The azo group shows trans-cis photoisomerization by UV and visible light irradiation.Therefore,the supra-amphiphile AzoChol/α-CD is photo-switchable,leading to the disassembly and re-assembly of vesicles irradiated by UV and visible light alternately.The supra-amphiphilic structure of the new material may display potential applications in field for development of smart materials. References | Related Articles | Metrics

Lecture of science and technolog

Select

Synthesis and application of ionic liquid surfactants (Ⅰ)Structure and classification WANG Jun, WANG Ping, YANG Xu-zhao, ZOU Wen-yuan, XU Qing-jie 2017, 47 (1):  7-12.  doi: 10.13218/j.cnki.csdc.2017.01.002 Abstract ( 357 )   PDF (874KB) ( 538 )   Based upon structure characters of ionic liquids,the structure and performance characters of ionic liquid surfactants were emphatically summarized.Results collected from literature surveying showed that they can be classified into five main types as cationic,anionic,amphoteric,Gemini and Bola.Their typical structure was described separately and they can be purposely designed according to requirement.There would be many new varieties of ionic liquid surfactant in future. References | Related Articles | Metrics

Development and applicatio

Select

Properties of gas/liquid interfacial film formed by defoamer and its influence with respect to performance of the defoamer WANG Chen-chen, YI Yu-feng, SUN Chao, DING Fu-chen, MAO Rui-yun, HAN Jia 2017, 47 (1):  13-17.  doi: 10.13218/j.cnki.csdc.2017.01.003 Abstract ( 326 )   PDF (783KB) ( 524 )   The defoaming and foam inhibiting performance of three kinds of defoamer (silicone oil,poly ether ester,and poly ether modified poly siloxane) were assessed according to defoaming test standard ASTM E2407;and the influence with respect to dilational modulus,dilational elasticity and dilational viscosity of the simulated foaming system by different defoamers were tested with LB balance.Results showed that the defoamer molecules are adsorbed on the gas/liquid interfacial film,which weaken the elasticity and the strength of the interfacial film,as well as attenuate the thickness of the film;thus result in shortening of foam existing time and finally foam rupture.Under the existing of defoamer molecules,stable foam layer cannot be formed within a certain time period due to the strength weakening of the interfacial film and thus result in the foam inhibiting effect.Within a certain mass fraction range,the higher the mass fraction of the same defoamer,the lower the interfacial film dilational modulus and dilational elasticity,and the better of the performance of defoaming and foam inhibiting.When the mass fraction exceeds a certain value,the interfacial dilational modulus and dilational elasticity essentially keep no change,and the performance of defoaming and foam inhibiting shows no more enhancing.For different types of defoamer,the higher amplitude of reduction capacity of interfacial film dilational modulus and dilational elasticity of the defoamer,the better performance of defoaming and foam inhibiting.Therefore,dilational modulus and dilational elasticity are correlated to defoaming and foam inhibiting performance of the defoamer. References | Related Articles | Metrics

Select

Synthesis of a kind of ternary copolymer anionic surfactant and its application in waste paper deinking agent MA Yan, ZHANG Chang-hui, XU Shu-qiang 2017, 47 (1):  18-22.  doi: 10.13218/j.cnki.csdc.2017.01.004 Abstract ( 306 )   PDF (718KB) ( 491 )   A kind of ternary copolymer anionic surfactant NaOL-AA-SMAS was synthesized by aqueous solution free radical polymerization with sodium oleate (NaOL),acrylic acid (AA) and sodium methallyl sulfonate (SMAS) as starting materials.The product was applied as an ingredient of waste paper deinking agent.Optimization of conditions for the preparation of the product was conducted taking the deinking effect as criteria.Further,the product was blended with a nonionic surfactant polyethoxy lauryl ether (AEO9) and the deinking efficacy of the blend was examined.Structure of the product was characterized by FT-IR;the molecular weight and its distribution of the product were measured by GPC;and the deinking efficacy of deinking agents containing the product or the blend,and purchased from market was tested and compared.Results showed that the synthesis process conditions,which shows the optimal deinking effect are as follows:n(NaOL)∶n(SMAS)∶n(AA)=1∶1∶3;reaction temperature,85 ℃;reaction time,5 h;w(APS)=2.5% (the mass of total reactants).When the blended deinking agent is formulated in accordance with m(NaOL-AA-SMAS)∶m(AEO9)=2∶1,the brightness of the deinked waste paper can reach to 71.9% and the residual ink concentration is 42.3 mm2/m2. References | Related Articles | Metrics

Select

Study on conditions for determination of lipase activity in detergent products and their effects on application result YANG Yuan, ZHANG Jian 2017, 47 (1):  23-27.  doi: 10.13218/j.cnki.csdc.2017.01.005 Abstract ( 333 )   PDF (844KB) ( 328 )   The activity of lipase was determined by alkali titration method and the conditions for the determination of lipase activity were studied.Results showed that the lipase activity is stable when the volume fraction of olive oil is 25% and the temperature is 40 ℃,pH=7.5.Under such conditions,the effects of adding anionic and nonionic surfactants were investigated.Results showed that effect of nonionic surfactants on the activity of lipase is less than that of anionic surfactants.Finally,the analysis method was applied to determine the activity of lipase in the commercial detergent products.Results showed that the method can be used for the determination of lipase activity in both liquid detergent and laundry powder.However,the temperature and pH value of the detergent solution should be controlled strictly during the conduction of the determination. References | Related Articles | Metrics

Select

Protective effect of Zn-MT-like extracted from C.vulgaris for NIH/3T3 cells against ultraviolet irradiation YANG Hong, HUANG Xiao-chun, HUANG Jing-yun, PENG Ai-hong, HUNG Zhi-yong 2017, 47 (1):  28-31.  doi: 10.13218/j.cnki.csdc.2017.01.006 Abstract ( 276 )   PDF (3064KB) ( 404 )   A laboratory model for testing ultraviolet irradiation damage of fibroblast (NIH/3T3) of mouse embryo was established;and it was applied for examination of protective effect of Zine-binding metallothionein-like (Zn-MT-like) extracted from C.vulgaris for NIH/3T3 cells against ultraviolet irradiation.Results showed that the Zn-MT-like presents a strong protective effect for the NH/3T3 cells from irradiation damage.For example,the Zn-MT-like at mass concentration of 10 g/L can effectively reduce the NIH/3T3 cell cavity and cell fragmentation under the ultraviolet irradiation,and maintaining rather good cell activity. References | Related Articles | Metrics

Select

Study on extraction conditions of ultraviolet absorption components from hemp powder GAN Liang, ZHANG Chen, YANG Xue-fang, NIU Yu-lian, ZHANG Zhi-wei 2017, 47 (1):  32-35.  doi: 10.13218/j.cnki.csdc.2017.01.007 Abstract ( 323 )   PDF (730KB) ( 289 )   Ethanol extraction method was used to extract the ultraviolet (UV) absorption active components in hemp powder.The UV absorbance of the supernatant liquid and the bottom sediment was determined by solution method and 3M tape method respectively.The extraction process was optimized with the UV absorbance as the index.Firstly,the experiment was carried out to explore an appropriate extraction process at room temperature.Then,factors like time,temperature and mass fraction of hemp powder in the suspension were tested to investigate their influence on UV absorbance.Results showed that ethanol is suitable to be used to extract the sunscreen active ingredients in the hemp powder (the main absorption wavelength is between 200 and 350 nm),and the optimum extraction conditions of the sunscreen ingredients are:extraction temperature,55 ℃;extraction time,1 h;mass fraction of the hemp powder,15%. References | Related Articles | Metrics

Select

Research on application of peptide from flesh of artificial raised Andrias davidianus in toothpaste ZHAO Guan-hua, TONG Chang-qing, LI Wei, QU Min 2017, 47 (1):  36-39.  doi: 10.13218/j.cnki.csdc.2017.01.008 Abstract ( 334 )   PDF (705KB) ( 357 )   A kind of peptide was isolated from flesh of artificial raised Andrias davidianus via enzymolysis.Molecular weight of the peptide was measured as 1 422,1 521,1 746,1 828 and 1 879 with a tandem time-of-flight MS system (MALDI-TOF/TOF).All the molecular weight values are lower than 2 000;and showed that the enzymolysis product is a kind of oligopeptide.The peptide extracted from Andrias davidianus was applied in formulation of toothpaste,and its antioxidation activity was examined based on method for determination of free radical scavenging activity.Results showed that when mass fraction of the peptide extract in the toothpaste formulation achieves 0.1%,rather good antioxidation effect can be obtained.Aqueous solution of the toothpaste is capable to scavenge DPPH free radicals,hydroxyl free radicals,superoxide anion radicals and ABTS free radicals. References | Related Articles | Metrics

Review

Select

Formation of microemulsion and status of development of the pesticide microemulsions SUN Chen-cheng, DONG Fan, YUAN Xiao-yong, MAO Hui-ying, SHEN Ya-ming, FENG Jian-guo 2017, 47 (1):  40-45.  doi: 10.13218/j.cnki.csdc.2017.01.009 Abstract ( 312 )   PDF (771KB) ( 411 )   Formation and stabilization mechanism of microemulsions,and influencing factors for formation and stability of the microemulsions as well as their characterization methods were summarized.Composition,formulation and quality indices of the pesticide microemulsions were presented.Current achievements with respect to formation and stabilization of the pesticide microemulsions in China were introduced,and existing problems in the research and development of the pesticide microemulsions were discussed.Meanwhile corresponding countermeasures for the development of pesticide microemulsions in future were put forward. References | Related Articles | Metrics

Select

Situation of research work with respect to melanogenesis-associated MITF gene and its expression YANG Peng-xin, LIU Lei, MA Lai-ji, HE Cong-fen 2017, 47 (1):  46-51.  doi: 10.13218/j.cnki.csdc.2017.01.010 Abstract ( 2412 )   PDF (900KB) ( 786 )   Microphthalmia-associated transcription factor (MITF) is the most important transcription factor in the melanogenesis process.MITF gene and its regulation of transcription level were presented.MITF protein and its action on melanocyte and regulation of melanogenesis,mainly via regulation of tyrosinase (TYR) gene family to control the survival and differentiation of melonocyte as well as conduction of the melanogenesis,its transportation and distribution were summarized.The application situation and prospect of MITF on cosmetics and medicine development were discussed. References | Related Articles | Metrics

Analytical methods and testing

Select

Determination of 22 kinds of ultraviolet absorbent by high performance liquid chromatography in cosmetics CUI Feng-jie, GU Jie, ZHANG Kun, SHI Wen-chun, ZHANG Hui-min 2017, 47 (1):  52-56.  doi: 10.13218/j.cnki.csdc.2017.01.011 Abstract ( 357 )   PDF (734KB) ( 505 )   An analytical method for simultaneous detection of 22 kinds of ultraviolet (UV) absorbent in sunscreen cosmetics was established by using HPLC.After the cosmetic samples were extracted by tetrahydrofuran (THF) or mixed solvent with V(THF)∶V(water)∶V(methanol)=9∶6∶5,the extracted components were separated using Agilent C18 column with gradient elution by a mixed solvent composed of methanol-perchloric acid aqueous solution-THF-acetonitrile with flow rate of 1.0 mL/min,and detected by a diode array detector (DAD) at 311 nm.The results showed that 22 kinds of UV absorbent were separated and detected well.The linearity relationship is within 0.1-500 mg/L.The correlation coefficient is greater than 0.999.The limit of quantification (LOQ) of all kinds of the UV absorbent is not higher than 4.6 mg/L.The spiked recovery rate is between 85.6% and 101.0%.In conclusion,the method was accurate and reliable with wide linear range,low LOQ and high sensitivity,which satisfies the requirement specified in China Safety and Technical Standards for Cosmetics (2015 edition). References | Related Articles | Metrics

Select

Determination of zirconium in anti-perspiration cosmetics CHEN Zhi-tao, JIANG Zhen-juan 2017, 47 (1):  57-60.  doi: 10.13218/j.cnki.csdc.2017.01.012 Abstract ( 243 )   PDF (789KB) ( 340 )   An arsenazo Ⅲ spectrophotometric method for determining zirconium content in anti-perspiration cosmetics was established.The effects of dosage of chromogenic agent,time and temperature for chromogenic action,as well as the coexisting ions on the absorbance were investigated.Results showed that under room temperature,absorbing wavelength of 664 nm and 30 min for chromogenic action are the suitable conditions.The linear range for zirconium content is 2~10 mg/L and the correlation coefficient R2 is 0.999 9;the detection limit is 59 mg/kg;the limit of quantification is 72 mg/kg;RSD achieves 3.23%;the spiked recovery achieves 88.8%~109.2%.Common coexisting ions,such as K+,Na+,Ba2+,Sb3+,Pb2+ and so on show no interference to the determination of zirconium.The method is reliable,accurate and suitable for the determination of zirconium in cosmetics. References | Related Articles | Metrics