Surface modification and chromophore attachment via ionic assembly and covalent fixation

Reactive Ionic;Ionic assembly;Covalent fixation;Surface modification;Reactive dyeing;Self-assembly

Hubbell, Christopher ; Polymer, Textile and Fiber Engineering

University:Georgia Institute of Technology

Department:Polymer, Textile and Fiber Engineering

关键词: Reactive Ionic;    Ionic assembly;    Covalent fixation;    Surface modification;    Reactive dyeing;    Self-assembly;   

Others  :  https://smartech.gatech.edu/bitstream/1853/28161/1/hubbell_christopher_200905_phd.pdf

美国|英语

来源: SMARTech Repository

【 摘 要 】

A reactive-ionic functional group was incorporated into the structure of fiber finishes and colorants to provide high-yield add-on and permanency.The reactive-ionic group consists of a moderately strained, cyclic ammonium group which undergoes ionic assembly on the surface of negatively charged substrates.The ionic bond is then converted to a covalent bond at elevated temperatures via a ring-opening reaction.A reactive-ionic alkyl (wax) finish was prepared from octadecanol and N-phenyl pyrrolidine then applied to a glass slide to provide a permanent, hydrophobic surface with an average contact angle increase of approximately 40°.A reactive-ionic fluorinated finish was prepared from 1H,1H,2H,2H-perfluoro-1-octanol and N-phenyl pyrrolidine and after application served as a permanent, non-wetting, anti-stain finish for nylon carpet.A reactive-ionic chromophore (dye) was prepared from C.I. Disperse Red 1 and quinuclidine.The reactive-ionic dye was applied to cellophane and nylon films and bleached cotton, nylon and silk fabrics.The percent exhaustion for a 1% owf dyeing of silk fabric was measured to be 98% using visible light absorbance spectrophotometry.K/S values obtained from reflectance spectrophotometric measurements of a 1% owf dyeing of nylon 6,6 fabric showed a 6% color loss after solvent extraction, indicating that the dyeing was indeed permanent.