The Experts below are selected from a list of 34893 Experts worldwide ranked by ideXlab platform
Sui Zhao - One of the best experts on this subject based on the ideXlab platform.
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dilational rheological properties of sulphobetaines at the water decane interface effect of Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014Co-Authors: Qun Zhang, Lei Zhang, Lu Zhang, Zhao-hui Zhou, Linfang Dong, Hong-zhuang Wang, Hong-yan Cai, Fan Zhang, Sui ZhaoAbstract:Abstract The interfacial tensions and dilational properties of adsorbed films of two zwitterionic surfactants with different Hydrophobic Groups, alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB), at the decane–water interface have been investigated by the drop shape analysis method. The influences of dilational frequency and bulk concentration on the interfacial dilational modulus and phase angle were expounded. The effects of electrolyte NaCl on the interfacial tensions and dilational properties have also been researched. The experimental results show that the similar CMC and IFT CMC values for ASB and BSB indicate their similar interfacial activity. The A min value of BSB is larger than that of ASB, which is due to the steric effect of benzene ring in BSB molecule. The dilational data show that betaines can form compact adsorption films due to their electric neutrality in experimental condition, which results in the higher maximum values of dilational moduli for both BSB and ASB than those of common surfactants. Moreover, the whole hydrophilic part, sulfonic Group, hydroxyl and ammonium Group, can response to the area variations by change the orientation between parallel to the interface and introduce to the aqueous instead of diffusion-exchange process, which can enhance the elasticity of the film. The electrolyte NaCl has a function of accelerating the diffusion-exchange process of surfactant molecules. As a result, the dynamic interfacial properties such as dilational properties show obvious variations, while the static interfacial property such as interfacial tension has little change after the addition of 1% NaCl.
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Dilational rheological properties of sulphobetaines at the water–decane interface: Effect of Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014Co-Authors: Qun Zhang, Lei Zhang, Lu Zhang, Zhao-hui Zhou, Linfang Dong, Hong-zhuang Wang, Hong-yan Cai, Fan Zhang, Sui ZhaoAbstract:Abstract The interfacial tensions and dilational properties of adsorbed films of two zwitterionic surfactants with different Hydrophobic Groups, alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB), at the decane–water interface have been investigated by the drop shape analysis method. The influences of dilational frequency and bulk concentration on the interfacial dilational modulus and phase angle were expounded. The effects of electrolyte NaCl on the interfacial tensions and dilational properties have also been researched. The experimental results show that the similar CMC and IFT CMC values for ASB and BSB indicate their similar interfacial activity. The A min value of BSB is larger than that of ASB, which is due to the steric effect of benzene ring in BSB molecule. The dilational data show that betaines can form compact adsorption films due to their electric neutrality in experimental condition, which results in the higher maximum values of dilational moduli for both BSB and ASB than those of common surfactants. Moreover, the whole hydrophilic part, sulfonic Group, hydroxyl and ammonium Group, can response to the area variations by change the orientation between parallel to the interface and introduce to the aqueous instead of diffusion-exchange process, which can enhance the elasticity of the film. The electrolyte NaCl has a function of accelerating the diffusion-exchange process of surfactant molecules. As a result, the dynamic interfacial properties such as dilational properties show obvious variations, while the static interfacial property such as interfacial tension has little change after the addition of 1% NaCl.
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study on foaming properties of polyoxyethylene alkyl ether carboxylic salts with different structures
Journal of Dispersion Science and Technology, 2011Co-Authors: Xinwang Song, Sui Zhao, Xiaochun Wang, Lei Zhang, Lu Zhang, Jiayong YuAbstract:In this article, foaming properties, dynamic surface tension, and surface dilational properties were carried out with aqueous solutions of polyoxyethylene alkyl ether carboxylic salts to elucidate the relationship between foaming properties and surfactant structures. It was found that the dynamic surface tension of the solution is the key factor in determining the foamability: with increasing in the length of the Hydrophobic Group, dynamic surface activity becomes low, which leads to the low foam volume; the surfactant with branched-alkyl chain has faster diffusion rate, which lead to higher dynamic surface activity and higher foam volume. However, for straight chain surfactant, the foam stability is correlated with the surface dilational properties: the change rule of surface dilational modulus is consistent with that of the foam stability.
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synthesis and surface properties of several nonionic anionic surfactants with straight chain alkyl benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Lu Zhang, Feng Yan, Sui ZhaoAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
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synthesis and surface properties of several nonionic anionic surfactants with straight chain alkyl benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Sui Zhao, Lu Zhang, Zhenquan Li, Jingyi An, Jiayong YuAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
Lu Zhang - One of the best experts on this subject based on the ideXlab platform.
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dilational rheological properties of sulphobetaines at the water decane interface effect of Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014Co-Authors: Qun Zhang, Lei Zhang, Lu Zhang, Zhao-hui Zhou, Linfang Dong, Hong-zhuang Wang, Hong-yan Cai, Fan Zhang, Sui ZhaoAbstract:Abstract The interfacial tensions and dilational properties of adsorbed films of two zwitterionic surfactants with different Hydrophobic Groups, alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB), at the decane–water interface have been investigated by the drop shape analysis method. The influences of dilational frequency and bulk concentration on the interfacial dilational modulus and phase angle were expounded. The effects of electrolyte NaCl on the interfacial tensions and dilational properties have also been researched. The experimental results show that the similar CMC and IFT CMC values for ASB and BSB indicate their similar interfacial activity. The A min value of BSB is larger than that of ASB, which is due to the steric effect of benzene ring in BSB molecule. The dilational data show that betaines can form compact adsorption films due to their electric neutrality in experimental condition, which results in the higher maximum values of dilational moduli for both BSB and ASB than those of common surfactants. Moreover, the whole hydrophilic part, sulfonic Group, hydroxyl and ammonium Group, can response to the area variations by change the orientation between parallel to the interface and introduce to the aqueous instead of diffusion-exchange process, which can enhance the elasticity of the film. The electrolyte NaCl has a function of accelerating the diffusion-exchange process of surfactant molecules. As a result, the dynamic interfacial properties such as dilational properties show obvious variations, while the static interfacial property such as interfacial tension has little change after the addition of 1% NaCl.
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Dilational rheological properties of sulphobetaines at the water–decane interface: Effect of Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014Co-Authors: Qun Zhang, Lei Zhang, Lu Zhang, Zhao-hui Zhou, Linfang Dong, Hong-zhuang Wang, Hong-yan Cai, Fan Zhang, Sui ZhaoAbstract:Abstract The interfacial tensions and dilational properties of adsorbed films of two zwitterionic surfactants with different Hydrophobic Groups, alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB), at the decane–water interface have been investigated by the drop shape analysis method. The influences of dilational frequency and bulk concentration on the interfacial dilational modulus and phase angle were expounded. The effects of electrolyte NaCl on the interfacial tensions and dilational properties have also been researched. The experimental results show that the similar CMC and IFT CMC values for ASB and BSB indicate their similar interfacial activity. The A min value of BSB is larger than that of ASB, which is due to the steric effect of benzene ring in BSB molecule. The dilational data show that betaines can form compact adsorption films due to their electric neutrality in experimental condition, which results in the higher maximum values of dilational moduli for both BSB and ASB than those of common surfactants. Moreover, the whole hydrophilic part, sulfonic Group, hydroxyl and ammonium Group, can response to the area variations by change the orientation between parallel to the interface and introduce to the aqueous instead of diffusion-exchange process, which can enhance the elasticity of the film. The electrolyte NaCl has a function of accelerating the diffusion-exchange process of surfactant molecules. As a result, the dynamic interfacial properties such as dilational properties show obvious variations, while the static interfacial property such as interfacial tension has little change after the addition of 1% NaCl.
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study on foaming properties of polyoxyethylene alkyl ether carboxylic salts with different structures
Journal of Dispersion Science and Technology, 2011Co-Authors: Xinwang Song, Sui Zhao, Xiaochun Wang, Lei Zhang, Lu Zhang, Jiayong YuAbstract:In this article, foaming properties, dynamic surface tension, and surface dilational properties were carried out with aqueous solutions of polyoxyethylene alkyl ether carboxylic salts to elucidate the relationship between foaming properties and surfactant structures. It was found that the dynamic surface tension of the solution is the key factor in determining the foamability: with increasing in the length of the Hydrophobic Group, dynamic surface activity becomes low, which leads to the low foam volume; the surfactant with branched-alkyl chain has faster diffusion rate, which lead to higher dynamic surface activity and higher foam volume. However, for straight chain surfactant, the foam stability is correlated with the surface dilational properties: the change rule of surface dilational modulus is consistent with that of the foam stability.
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synthesis and surface properties of several nonionic anionic surfactants with straight chain alkyl benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Lu Zhang, Feng Yan, Sui ZhaoAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
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synthesis and surface properties of several nonionic anionic surfactants with straight chain alkyl benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Sui Zhao, Lu Zhang, Zhenquan Li, Jingyi An, Jiayong YuAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
Xianguang Wang - One of the best experts on this subject based on the ideXlab platform.
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synthesis and surface properties of several nonionic anionic surfactants with straight chain alkyl benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Lu Zhang, Feng Yan, Sui ZhaoAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
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synthesis and surface properties of several nonionic anionic surfactants with straight chain alkyl benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Sui Zhao, Lu Zhang, Zhenquan Li, Jingyi An, Jiayong YuAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
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Synthesis and surface properties of several nonionic–anionic surfactants with straight chain alkyl-benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Lu Zhang, Feng Yan, Sui ZhaoAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
Qun Zhang - One of the best experts on this subject based on the ideXlab platform.
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dilational rheological properties of sulphobetaines at the water decane interface effect of Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014Co-Authors: Qun Zhang, Lei Zhang, Lu Zhang, Zhao-hui Zhou, Linfang Dong, Hong-zhuang Wang, Hong-yan Cai, Fan Zhang, Sui ZhaoAbstract:Abstract The interfacial tensions and dilational properties of adsorbed films of two zwitterionic surfactants with different Hydrophobic Groups, alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB), at the decane–water interface have been investigated by the drop shape analysis method. The influences of dilational frequency and bulk concentration on the interfacial dilational modulus and phase angle were expounded. The effects of electrolyte NaCl on the interfacial tensions and dilational properties have also been researched. The experimental results show that the similar CMC and IFT CMC values for ASB and BSB indicate their similar interfacial activity. The A min value of BSB is larger than that of ASB, which is due to the steric effect of benzene ring in BSB molecule. The dilational data show that betaines can form compact adsorption films due to their electric neutrality in experimental condition, which results in the higher maximum values of dilational moduli for both BSB and ASB than those of common surfactants. Moreover, the whole hydrophilic part, sulfonic Group, hydroxyl and ammonium Group, can response to the area variations by change the orientation between parallel to the interface and introduce to the aqueous instead of diffusion-exchange process, which can enhance the elasticity of the film. The electrolyte NaCl has a function of accelerating the diffusion-exchange process of surfactant molecules. As a result, the dynamic interfacial properties such as dilational properties show obvious variations, while the static interfacial property such as interfacial tension has little change after the addition of 1% NaCl.
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Dilational rheological properties of sulphobetaines at the water–decane interface: Effect of Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2014Co-Authors: Qun Zhang, Lei Zhang, Lu Zhang, Zhao-hui Zhou, Linfang Dong, Hong-zhuang Wang, Hong-yan Cai, Fan Zhang, Sui ZhaoAbstract:Abstract The interfacial tensions and dilational properties of adsorbed films of two zwitterionic surfactants with different Hydrophobic Groups, alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB), at the decane–water interface have been investigated by the drop shape analysis method. The influences of dilational frequency and bulk concentration on the interfacial dilational modulus and phase angle were expounded. The effects of electrolyte NaCl on the interfacial tensions and dilational properties have also been researched. The experimental results show that the similar CMC and IFT CMC values for ASB and BSB indicate their similar interfacial activity. The A min value of BSB is larger than that of ASB, which is due to the steric effect of benzene ring in BSB molecule. The dilational data show that betaines can form compact adsorption films due to their electric neutrality in experimental condition, which results in the higher maximum values of dilational moduli for both BSB and ASB than those of common surfactants. Moreover, the whole hydrophilic part, sulfonic Group, hydroxyl and ammonium Group, can response to the area variations by change the orientation between parallel to the interface and introduce to the aqueous instead of diffusion-exchange process, which can enhance the elasticity of the film. The electrolyte NaCl has a function of accelerating the diffusion-exchange process of surfactant molecules. As a result, the dynamic interfacial properties such as dilational properties show obvious variations, while the static interfacial property such as interfacial tension has little change after the addition of 1% NaCl.
Jiayong Yu - One of the best experts on this subject based on the ideXlab platform.
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study on foaming properties of polyoxyethylene alkyl ether carboxylic salts with different structures
Journal of Dispersion Science and Technology, 2011Co-Authors: Xinwang Song, Sui Zhao, Xiaochun Wang, Lei Zhang, Lu Zhang, Jiayong YuAbstract:In this article, foaming properties, dynamic surface tension, and surface dilational properties were carried out with aqueous solutions of polyoxyethylene alkyl ether carboxylic salts to elucidate the relationship between foaming properties and surfactant structures. It was found that the dynamic surface tension of the solution is the key factor in determining the foamability: with increasing in the length of the Hydrophobic Group, dynamic surface activity becomes low, which leads to the low foam volume; the surfactant with branched-alkyl chain has faster diffusion rate, which lead to higher dynamic surface activity and higher foam volume. However, for straight chain surfactant, the foam stability is correlated with the surface dilational properties: the change rule of surface dilational modulus is consistent with that of the foam stability.
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synthesis and surface properties of several nonionic anionic surfactants with straight chain alkyl benzyl Hydrophobic Group
Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2007Co-Authors: Xianguang Wang, Sui Zhao, Lu Zhang, Zhenquan Li, Jingyi An, Jiayong YuAbstract:Abstract New nonionic–anionic surfactants of sodium straight chain alkyl benzyl alcohol homogeneous polyoxyethylenated propane sulfonates (ABEPS) were synthesized by the reaction of long chain alkyl (octyl, decyl and lauryl) benzyl chlorine with tri(ethylene glycol), followed by the reaction with 1,3-propane sultone. The physicochemical properties of ABEPS (e.g. Krafft temperature and equilibrium surface tension) have been measured. ABEPS shows favorable solubility, and all of the Krafft temperatures are below 0 °C. With increasing alkyl chain length, the critical micelle concentration (CMC), surface tension at CMC (γCMC) and surface area per molecule (Amin) of ABEPS decrease, and the efficiency in reducing surface tension (pC20) and adsorption at the air/water interface relation to micellization (CMC/C20) increase clearly. Compared with fat alcohol ether sulfates with an analogous number of carbon atoms in Hydrophobic Group, the values of pC20 and CMC/C20 for ABEPS were more predominant. Moreover, these surfactants in the article show the character of both nonionic and ionic surfactants due to its particular molecular structure.
