Non-formaldehyde, crease resistant agent for cotton fabrics based on an organic-inorganic hybrid material.
1,2,3,4-Butanetetracarboxylic acid (BTCA) was reacted with (3-aminopropyl)triethoxysilane (APTES) to a poly(amic)acid (PAA). The molar ratios of BTCA and APTES were 1/1 (B/A-1/1), 1/2 (B/A-1/2), 1/3 (B/A-1/3), and 1/4 (B/A-1/4). The as-prepared precursor solution was applied to cotton substrates. After thermal treatment (180°C) the physical-mechanical properties of the cotton samples were tested by means of dry crease recovery angle and tensile strength. For B/A-1/1 treated fabrics a significant improvement of the crease resistance was observed. FT-IR spectra revealed the formation of an imide group and an ester linkage, indicating the cross-linking of the cellulosic material. SEM images showed a smooth surface. As evidenced by TGA data the thermal stability of the cotton samples was not increased. No hydrophobicity could be observed. For B/A-1/3 and (B/A-1/4) modified cotton samples no crease resistant properties were detected. However, enhanced contact angle values were measured. A reaction mechanism for the formation of the ladder-like polysilsesquioxane and the cross-linking reaction is proposed.
Research Institute of Textile Chemistry and Textile Physics, University of Innsbruck, Höchsterstrasse 73, A-6850 Dornbirn, Austria. Electronic address: christian.schramm@uibk.ac.at.
Christian
C
Schramm
Research Institute of Textile Chemistry and Textile Physics, University of Innsbruck, Höchsterstrasse 73, A-6850 Dornbirn, Austria. Electronic address: beate.rinderer@uibk.ac.at.
Beate
B
Rinderer
Institute of Mineralogy and Petrography, University of Innsbruck, Bruno-Sander-Haus, Innrain 52, A-6020 Innsbruck, Austria. Electronic address: richard.tessadri@uibk.ac.at.
Richard
R
Tessadri
D003124:Colorimetry / Q000379:methods; D032561:Cotton Fiber / Q000379:methods*; D005557:Formaldehyde / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D013718:Tensile Strength; D013784:Textiles / Q000032:analysis
D005557:Formaldehyde
Cotton; Crease resistance; Organic–inorganic hybrid; Polyimide; Sol–gel