Experimental artifacts in the surface pressure measurement for lignin monolayers in Langmuir troughs

被引：22

作者：

Constantino, CJL ^{[1
]}

Dhanabalan, A ^{[1
]}

Oliveira, ON ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1999年 / 70卷 / 09期

关键词：

D O I：

10.1063/1.1149949

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The surface pressure measured with the Wilhelmy method may vary considerably with the experimental conditions adopted for isotherms of nonamphiphilic, macromolecular substances, in contrast to the majority of traditional amphiphilic compounds such as fatty acids. This is demonstrated here by analyzing monolayer characteristics of lignins, for which a variety of conditions were employed, including change in the mode of compression, positioning of the Wilhelmy plate, and compression speeds. A minimum in the decompression leg of a hysteresis experiment was found to arise from experimental artifacts, which are explained in terms of the various forces experienced by the Wilhelmy plate. (C) 1999 American Institute of Physics. [S0034-6748(99)01009-6].

引用

页码：3674 / 3680

页数：7

共 29 条

[1]

BARROS AM, UNPUB THIN SOLID FIL

[2] A determination of the phase diagram of relaxed Langmuir monolayers of Behenic acid [J].

Bommarito, GM ;

Foster, WJ ;

Pershan, PS ;

Schlossman, ML .

JOURNAL OF CHEMICAL PHYSICS, 1996, 105 (12) :5265-5284

[3]

BOTARO VR, 1993, P BRAZ S CHEM LIGN O, V4, P195

[4] Preparation and characterization of composite LB films of lignin and cadmium stearate [J].

Constantino, CJL ;

Dhanabalan, A ;

Curvelo, A ;

Oliveira, ON .

THIN SOLID FILMS, 1998, 327 :47-51

[5]

CONSTANTINO CJL, 1996, THIN SOLID FILMS, V285, P191

[6]

CONSTANTINO CJL, 1999, THESIS U SAO PAULO S

[7] Aggregation of poly(styrene)-poly(ethylene oxide) diblock copolymer monolayers at the air-water interface [J].

da Silva, AMG ;

Simoes Gamboa, AL ;

Martinho, JMG .

LANGMUIR, 1998, 14 (18) :5327-5330

[8]

daSilva AMG, 1996, LANGMUIR, V12, P6547

[9] A study of Langmuir and Langmuir-Blodgett films of polyaniline [J].

Dhanabalan, A ;

Dabke, RB ;

Kumar, NP ;

Talwar, SS ;

Major, S ;

Lal, R ;

Contractor, AQ .

LANGMUIR, 1997, 13 (16) :4395-4400

[10] Mixed Langmuir and Langmuir-Blodgett films of disperse red-13 dye-derivatized methacrylic homopolymer and cadmium stearate [J].

Dhanabalan, A ;

Balogh, DT ;

Mendonca, CR ;

Riul, A ;

Constantino, CJL ;

Giacometti, JA ;

Zilio, SC ;

Oliveira, ON .

LANGMUIR, 1998, 14 (13) :3614-3619

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