Surface modification of poly(vinyl alcohol) fibers to control the fiber-matrix interaction in composites

被引：35

作者：

Drechsler, Astrid ^{[1
]}

Frenzel, Ralf ^{[1
]}

Caspari, Anja ^{[1
]}

Michel, Stefan ^{[1
]}

Holzschuh, Matthias ^{[1
]}

Synytska, Alla ^{[1
]}

Curosu, Iurie ^{[2
]}

Liebscher, Marco ^{[2
]}

Mechtcherine, Viktor ^{[2
]}

机构：

[1] Leibniz Inst Polymerforsch Dresden eV, Hohe Str 6, D-01069 Dresden, Germany

[2] Tech Univ Dresden, Inst Construct Mat, Georg Schumann Str 7, D-01187 Dresden, Germany

来源：

COLLOID AND POLYMER SCIENCE | 2019年 / 297卷 / 7-8期

关键词：

Poly(vinyl alcohol) fiber; Surface modification; Fiber-reinforced composites; X-ray photoelectron spectroscopy (XPS); Zeta potential; Contact angle; CEMENT-BASED COMPOSITES; TENSILE BEHAVIOR; INTERPHASE; STRENGTH; LAYER; SHCC;

D O I：

10.1007/s00396-019-04528-z

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：

Polymeric fibers with varied acid/base behavior and wettability were prepared to control fiber-matrix interactions in fiber-reinforced composites. Water-insoluble high-performance poly(vinyl alcohol) fibers were equipped with different surface functionalities on a molecular level by chemical bonding of aldehydes and adsorption of acidic and alkaline polyelectrolytes. The fibers were characterized by surface-sensitive methods, such as X-ray photoelectron spectroscopy, zeta potential, and contact angle measurements. The modification resulted in stable thin nonpolar layers or polar acidic, alkaline, and amphoteric surface functionalities on the fiber surface, with advancing contact angles of deionized water between 30 degrees and 90 degrees. Fiber-matrix interactions were probed by pullout tests of single fibers embedded in a cementitious matrix and subsequent morphological analysis of the fibers. Polar surface functionalities caused a strong fiber-matrix adhesion while nonpolar, hydrophobic surface layers decreased the adhesion dramatically. The surface charge and acid/base behavior of the fibers had no significant influence.

引用

页码：1079 / 1093

页数：15

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