Fabrication of Superhydrophobic Cellulose-Based Materials through a Solution-Immersion Process

Abstract

An industrial waterproof reagent [(potassium methyl siliconate) (PMS)] was used for fabricating a superhydrophobic surface on a cellulose-based material (cotton fabric or paper) through a solution-immersion method. This method involves a hydrogen bond assembly and a polycondensation process. The silanol, which was formed by a reaction of PMS aqueous solution with CO 2, was assembled on the cellulose molecule surface via hydrogen bond interactions. The polymethylsilsesquioxane coatings were prepared by a polycondensation reaction of the hydroxyl between cellulose and silanol. The superhydrophobic cellulose materials were characterized by FTIR spectroscopy, thermogravimetry, and surface analysis (XPS, FESEM, AFM, and contact angle measurements). Analytical characterization revealed that nanoscale roughness protuberances uniformly covered the surface, thus transforming the cellulose from superhydrophilic to superhydrophobic with a water contact angle of 157 degrees . The superhydrophobic coatings were satisfactory with regard to both chemical and mechanical durability, and because of the transparency of the coatings the native cotton fabric displayed no changes with regard to either morphology or color. The easy availability of the materials and simplicity of this method render it convenient for mass production.

One-dimensional silicone nanofilaments

“…Several researchers reported nanoparticles similar to 1D-SNF in structure, synthesis or superhydrophobic behaviour [102][103][104][105][106][107]. However, either the existence of one-dimensional particles is not discussed, no or ambiguous analytical data are provided or the true onedimensional character of the product remains unclear.…”

Obtenção de substância surfactante a partir da modificação de celulose

“…Contudo, nas últimas décadas, a celulose vem sendo modificada quimicamente com o intuito de produzir novos materiais e substâncias aditivas para processos industriais, visando substituir produtos de uso convencional, advindos de derivados de petróleo [1][2][3][4][5].…”

Potassium methyl siliconate‐treated pulp fibers and their effects on wood plastic composites: Water sorption and dimensional stability

“…The absorbance peaks at 1271, 1104, 1019, and 768 cm À1 correspond to the molecular vibrations of siloxane components on the PMS-treated fibers. The peak at 1271 cm À1 of the PMS-treated fibers resulted from stretching vibrations of the SiACH 3 bonds, 20,22,23 whereas the peak at 768 cm À1 corresponds to the vibrations of a collection of bonds, including SiAO, SiAC, and/or SiAOAC. 22,24 The peak at 1019 cm À1 is typically attributed to stretching of SiAOASi bonds 23,25 developed among the silanols.…”

“…PMS is used commercially as a hydrophobic sealant for cement protection and has also been used to create superhydrophobic surfaces on fabric substrates. 20 In this report, the topography of PMS-treated fibers as well as the water sorption and dimensional stability of PMS-treated fiber/flour plastic composites are characterized.…”