Surfactant softening of plant leaf cuticle model wax - A Differential Scanning Calorimetry (DSC) and Quartz Crystal Microbalance with Dissipation (QCM-D) study

被引：16

作者：

Fagerstrom, Anton ^{[1
,2
]}

Kocherbitov, Vitaly ^{[1
,2
]}

Westbye, Peter ^{[3
]}

Bergstrom, Karin ^{[3
]}

Arnebrant, Thomas ^{[1
,2
]}

Engblom, Johan ^{[1
,2
]}

机构：

[1] Malmo Univ, Fac Hlth & Soc, SE-20506 Malmo, Sweden

[2] Malmo Univ, Biofilms Res Ctr Biointerfaces, SE-20506 Malmo, Sweden

[3] AkzoNobel Surface Chem AB, Agro Applicat Europe, SE-44430 Stenungsund, Sweden

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2014年 / 426卷

关键词：

Plant leaf cuticle; Surfactant softening; Fluidizing effect; Wax film; Quartz Crystal Microbalance with Dissipation (QCM-D); Differential Scanning Calorimetry (DSC); Crystalline domains; FATTY ALCOHOL SURFACTANTS; CUTICULAR PENETRATION; SEPARATION; WATER; NONELECTROLYTES; ACCELERATORS; DIFFUSION; TRANSPORT; LEAVES; STATES;

D O I：

10.1016/j.jcis.2014.03.064

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The aim was to quantify the softening effect that two surfactants (C10EO7 and C(8)G(1.6)) have on a plant leaf cuticle model wax. Effects on the thermotropic phase behavior and fluidity of the wax (C22H45OH/C32H66/H2O) were determined. The model wax is crystalline at ambient conditions, yet it is clearly softened by the surfactants. Both surfactants decreased the transition temperatures in the wax and the G ''/G' ratio of the wax film increased in irreversible steps following surfactant exposure. C10EO7 has a stronger fluidizing effect than C(8)G(1.6) due to stronger interaction with the hydrophobic waxes. Intracuticular waxes (IW) comprise both crystalline and amorphous domains and it has previously been proposed that the fluidizing effects of surfactants are due to interactions with the amorphous parts. New data suggests that this may be a simplification. Surfactants may also absorb in crevices between crystalline domains. This causes an irreversible effect and a softer cuticle wax. (C) 2014 Elsevier Inc. All rights reserved.

引用

页码：22 / 30

页数：9

共 28 条

[1] INVESTIGATION ON THE MICROSTRUCTURES IN MIXTURES OF WATER WITH THE NONIONIC SURFACTANTS C8E5, C10E6, AND C10E8 IN THE WHOLE RANGE OF COMPOSITION [J].

ALAMI, E ;

KAMENKA, N ;

RAHARIMIHAMINA, A ;

ZANA, R .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1993, 158 (02) :342-350

[2]

[Anonymous], 2009, Water and solute permeability of Plant CuticlesMeasurment and Data Analysis

[3]

Baur P, 1999, PESTIC SCI, V55, P831, DOI 10.1002/(SICI)1096-9063(199908)55:8<831::AID-PS25>3.0.CO

[4]

[5]

Baur P, 1997, PESTIC SCI, V51, P131, DOI 10.1002/(SICI)1096-9063(199710)51:2<131::AID-PS614>3.0.CO

[6]

2-D

[7]

Baur P., 1998, Recent Research Developments in Agricultural & Food Chemistry, V2, P809

[8] Separation of Bulk Effects and Bound Mass during Adsorption of Surfactants Probed by Quartz Crystal Microbalance with Dissipation: Insight into Data Interpretation [J].

Bordes, Romain ;

Hook, Fredrik .

ANALYTICAL CHEMISTRY, 2010, 82 (21) :9116-9121

[9] Thermodynamic analysis of diffusion of non-electrolytes across plant cuticles in the presence and absence of the plasticiser tributyl phosphate [J].

Buchholz, A ;

Schönherr, J .

PLANTA, 2000, 212 (01) :103-111

[10] Characterization of the diffusion of non-electrolytes across plant cuticles: properties of the lipophilic pathway [J].

Buchholz, Anke .

JOURNAL OF EXPERIMENTAL BOTANY, 2006, 57 (11) :2501-2513

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