亲水基尺寸对芥酸甜菜碱吸附膜性质的影响
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摘要
为揭示甜菜碱的表面吸附机制,利用气泡外形分析方法,研究亲水基团尺寸不同的表面活性剂芥酸羧基甜菜碱(EDAC)和芥酸磺基甜菜碱(EDAS)的表面吸附膜的流变性质,考察时间、频率和浓度等因素对表面扩张模量的影响。结果表明:EDAC和EDAS分子中具有较大的亲水基团,其平铺在溶液表面上,形成的吸附膜以弹性为主;EDAS的亲水基团尺寸较大,其吸附膜的性质在临界胶束浓度(CMC)前主要由膜结构决定,且EDAS吸附膜的弹性更强,扩张模量数值最高达50 mN/m,明显高于EDAC的35 mN/m;说明较大的亲水基团尺寸有利于甜菜碱吸附膜强度的增大。
To reveal the surface adsorption mechanism of betaine, the surface dilational rheological properties of erucyl dimethyl amidopropyl carboxybetaine(EDAC) and sulfobetaine(EDAS) were investigated by bubble shape analysis. The influences of time, frequency and concentration on surface dilational modulus were expounded.The results showed that the EDAC and EDAS adsorption films show elastic nature because the large hydrophilic groups flat at the surface. The properties of adsorption film for EDAS with larger hydrophilic group are controlled by the structure of layer before critical micelle concentration(CMC). Moreover, EDAS film shows higher elasticity than EDAC film and the maximum modulus of EDAS film is about 50 mN/m, which is obviously higher than that of EDAC film(35 mN/m). It can be concluded that larger hydrophilic group of betaine leads to higher strength of adsorption film.
To reveal the surface adsorption mechanism of betaine, the surface dilational rheological properties of erucyl dimethyl amidopropyl carboxybetaine(EDAC) and sulfobetaine(EDAS) were investigated by bubble shape analysis. The influences of time, frequency and concentration on surface dilational modulus were expounded.The results showed that the EDAC and EDAS adsorption films show elastic nature because the large hydrophilic groups flat at the surface. The properties of adsorption film for EDAS with larger hydrophilic group are controlled by the structure of layer before critical micelle concentration(CMC). Moreover, EDAS film shows higher elasticity than EDAC film and the maximum modulus of EDAS film is about 50 mN/m, which is obviously higher than that of EDAC film(35 mN/m). It can be concluded that larger hydrophilic group of betaine leads to higher strength of adsorption film.
引文
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[23]李振泉,张磊,严峰,等.不同结构芳香侧链酰基牛磺酸钠的表面扩张性质[J].物理化学学报,2009,25:1939-1944.LI Z Q,ZHANG L,YAN F,et al. Surface dilational properties of n-acyltaurate amphiphiles with aromatic side chains[J]. Acta Physica Sinica,2009,25:1939-1944(in Chinese).
[24] LIU K X,YIN H J,ZHANG L,et al. Interfacial dilational rheology of fatty acid methyl ester and alkyl benzene sulfonate mixed solutions[J]. Journal of Molecular Liquids,2018,269:335-343.
[2] MILLER R,WSTNECK R,KRGEL J,et al. Dilatational and shear rheology of adsorption layers at liquid interfaces[J].Colloids and Surfaces A:Physicochemical and Engineering,1996,111:75-118.
[3] MURRAY B S. Interfacial rheology of food emulsifiers and proteins[J]. Current Opinion in Colloid&Interface Science,2002,7:426–431
[4]方云.两性表面活性剂[M].北京:中国轻工业出版社,2001.FANG Y. Awitterionic Surfactant[M]. Beijing:China Light Industry Press,2001(in Chinese).
[5] ZHOU Z H,MA D S,ZHANG Q,et al. Surface dilational rheology of betaine surfactants:Effect of molecular structures[J].Colloids and Surfaces A:Physicochemical and Engineering,2018,538:739-747.
[6] ZHOU Z H,ZHANG Q,LIU Y,et al. Effect of fatty acids on interfacial tensions of novel sulphobetaines solutions[J]. Energy&Fuels,2014,28(2):1020-1027.
[7] ZHANG Q,ZHOU Z H,DONG L F,et al. Dilational rheological properties of novel sulphobetaines at water-decane interface:Effect of hydrophobic group[J]. Colloids and Surfaces A:Physicochemical and Engineering,2014,455:97-103.
[8]阮崇宇,司徒伟贤,朱岩,等.甜菜碱-聚醚复配体系界面流变性能研究[J].武汉理工大学学报,2017,39(8):28-32.RUAN C Y,SITU W X,ZHU Y,et al. Dilational rheological properties research of betaine polyether mixing system[J]. Journal of Wuhan University of Technology,2017,39(8):28-32(in Chinese).
[9] WANG C,ZHAO L,XU B C,et al. Effect of dynamic interfacial dilational properties on the foam stability of catanionic surfactant mixtures in the presence of oil[J]. Colloids and Surfaces A:Physicochemical and Engineering,2018,541:78-86.
[10] WANG L,ASTHAGIRI D,ZENG Y,et al. Simulation studies on the role of lauryl betaine in modulating the stability of AOS surfactant-stabilized foams used in enhanced oil recovery[J].Energy&Fuels,2017,31(2):1512-1518.
[11] MITRINOVA Z,TCHOLAKOVA S,DENKOV N,et al. Role of interactions between cationic polymers and surfactants for foam properties[J]. Colloids and Surfaces A:Physicochemical and Engineering,2016,489:378-391.
[12] ZHAO J,ZOU W. Foams stabilized by mixed cationic gemini/anionic conventional surfactants[J]. Colloid and Polymer Science,2013,291(6):1471-1478.
[13] MM F T,UER G S,AMPICCHIO M S,et al. Pendant drop tensiometry for the evaluation of the foaming properties of milk-derived proteins[J]. Food Hydrocolloids,2012,27(2):371-377.
[14] POLITOVAN,TCHOLAKOVA S,GOLEMANOVK,et al. Effect of cationic polymers on foam rheological properties[J].Langmuir,2012,28(2):1115-1126.
[15] NOSKOV B A,LOGLIO G,MILLER R. Dilational surface visco-elasticity of polyelectrolyte/surfactant solutions:Formation of heterogeneous adsorption layers[J]. Advances in Colloid and Interface Science,2011,168(1/2):179-197.
[16] YANG X,FOEGEDING E A. Effects of sucrose on egg white protein and whey protein isolate foams:Factors determining properties of wet and dry foams(cakes)[J]. Food Hydrocolloids,2010,24(2/3):227-238.
[17] BLIJDENSTEIN T B J,DE GROOT P W N,STOYANOVS D.On the link between foam coarsening and surface rheology:Why hydrophobins are so different[J]. Soft Matter,2010,6(8):1799-1808.
[18] DAVISJ P,FOEGEDINGE A. Comparisons of the foaming and interfacial properties of whey protein isolate and egg white proteins[J]. Colloids and Surfaces B:Biointerfaces,2007,54(2):200-210.
[19]张磊,王晓春,宫清涛,等.空气/水表面2,5-二丙基-4-十一烷基苯磺酸钠的表面动态扩张流变性质[J].物理化学学报,2007,23:1652-1656.ZHANG L,WANG X C,GONG Q T,et al. Dynamic dilational properties of 2,5-dipropyl-4-undecylbenzene sulfonate at the air/water interface[J]. Acta Physica Sinica,2007,23:1652-1656(in Chinese).
[20] HUANG Y P,ZHANG L,ZHANG L,et al. Dynamic interfacial dilational properties of hydroxy-substituted alkyl benzenesulfonates[J]. The Journal of Physical Chemistry B,2007,111:5640-5647.
[21] FENG J,LIU X P,ZHANG L,et al. The dilational properties of anionic gemini surfactants with polyoxyethylene spacers at water-air and water-decane interfaces[J]. Langmuir,2010,26(14):11907-11914.
[22]王其伟.十六烷基聚氧乙烯醚羟丙基羧酸甜菜碱表面扩张流变研究[J].天津工业大学学报,2013,32(2):46-49.WANG Q W. Study on surface dilational rheology of guerbet alcohol hexadecyl polyoxyethylene glycidyl ether glycine betaine[J]. Journal of Tianjin Polytechnic University,2013,32(2):46-49(in Chinese).
[23]李振泉,张磊,严峰,等.不同结构芳香侧链酰基牛磺酸钠的表面扩张性质[J].物理化学学报,2009,25:1939-1944.LI Z Q,ZHANG L,YAN F,et al. Surface dilational properties of n-acyltaurate amphiphiles with aromatic side chains[J]. Acta Physica Sinica,2009,25:1939-1944(in Chinese).
[24] LIU K X,YIN H J,ZHANG L,et al. Interfacial dilational rheology of fatty acid methyl ester and alkyl benzene sulfonate mixed solutions[J]. Journal of Molecular Liquids,2018,269:335-343.