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    Surface Modification of Cellulose Microfibrils with Silane Agent for Eco-Friendly Hydrophobic Coatings

    Year: 2022

    Journal: Russ. J. Appl. Chem., Volume 95, MAR, page 379–386

    Authors: Nhi, Tran Thi Y.; Cong, Trinh Duc; Hop, Tran Thi Thanh; Hai, Luong Nhu; Huu, Nguyen The; Tung, Ngo Trinh

    Organizations: Vietnam Academy of Science and Technology [VAST 03.08/21-22, CT0000.06/21-22]; Institute of Chemistry [VHH.2022.06]

    Keywords: CMF; silane agent; hydrophobic surface; kraft paper; Box-Behnken design

    In this study, an optimized method for surface modification of cellulose microfibrils (CMF) with (3-Aminopropyl) trimethoxysilane (APTMS) for eco-friendly hydrophobic coating on kraft paper was achieved using Box-Behnken Design (BBD) through response surface methodology (RSM). Three parameters, including APTMS concentration, hydrolysis-condensation reaction time of APTMS and curing temperature of APTMS, were optimized to obtain the highest water contact angle (theta(H2O)) of the coated kraft paper. The optimal coating conditions extracted by Design Expert Software for the highest value of water contact angle theta(H2O) were APTMS concentration of 8.02% (v/v), APTMS hydrolysis-condensation reaction time of 68.2 min and APTMS curing temperature of 105.3 degrees C. Under these conditions the water contact angle theta(H2O) of 123.3 degrees was obtained. The water contact angle theta(H2O) obtained at these optimal coating conditions experimentally was 124.5 degrees. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), energy dispersive X-Ray (EDX) analysis and scanning electron microscopy (SEM) provided evidence of successful surface silylated of CMF with APTMS.
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