Surface modification of silicate glass using 3-(mercaptopropyl)trimethoxysilane for thiol-ene polymerization

Area of Science:

• Materials Science
• Polymer Chemistry
• Surface Chemistry

Background:

• Surface modification of glass is crucial for various applications.
• Grafting polymers onto surfaces can impart desired properties.
• Existing methods may be time-consuming or complex.

Purpose of the Study:

• To develop a facile and rapid method for grafting polymers onto silicate glass slides.
• To utilize 3-(mercaptopropyl)trimethoxysilane (MTS) as both a silane coupling agent and initiator.
• To create functionalized glass surfaces with diverse homopolymers and copolymers.

Main Methods:

• Silane coupling of MTS to acid-cleaned glass via sol-gel reaction.
• Thiol-ene polymerization to graft poly(acrylic acid) (PAA), poly(acrylamide) (PAAm), poly(methyl acrylate) (PMA), poly(acrylamido-2-methyl-propanesulfonic acid) (PAMPS), and a copolymer.
• Characterization using ATR-FTIR, XPS, TM-AFM, and contact angle measurements (OWK and LW-AB methods).

Main Results:

• Successful covalent bonding of MTS to glass surfaces.
• Efficient grafting of various homopolymers and copolymers from the MTS thiol group.
• Comprehensive characterization of surface chemistry, texture, and surface energy.

Conclusions:

• The thiol-ene polymerization approach provides a rapid and facile method for surface grafting on glass.
• This method enables the creation of tailored polymer-grafted glass surfaces.
• The study demonstrates a versatile strategy for surface functionalization.