Fabrication of Cotton Fabric with Superoleophilic/Superhydrophobic Characteristic on the Modified Surface by Using Fluoroalkylated Oligomeric Silica/Triazine Derivative Nanocomposites

Abstract

Two fluoroalkylated vinyltrimethoxysilane oligomer (R F -(CH 2 CHSi(OMe) 3 ) n -R F ; n = 2, 3; R F = CF(CF 3 )OC 3 F 7 :R F -VMSi) in methanol reacted with aqueous sodium carbonate solution containing 2-hydroxy-4,6-dichloro-1,3,5-triazine sodium salt (TAZ) to provide two fluoroalkylated oligomeric silica/TAZ nanocomposites (R F -VMSiO 2 /TAZ). The original cotton fabric gives an oleophilic/hydrophilic property on its surface; however, modified cotton fabric surface with R F -VMSiO 2 /TAZ composites was demonstrated to provide highly oleophobic/superhydrophobic property on the surface. We can observe a remarkable time-dependent decrease of the contact angle of dodecane (oil) on the modified surfaces, and the contact angles of dodecane were found to decrease effectively from 55 • -83 • to 0 • over 5-30 s to supply superoleophilicity with keeping the superhydrophobic property on the surfaces. The modified cotton fabric having superoleophilic/superhydrophobic property was applicable to the separation membrane to separate oil and water. Interestingly, modified cotton fabric was found to adsorb efficiently only droplets of oil spread on the water interface due to its unique surface wettability.

Ultrafast and Sustainable Catalyst-Free Chemical Functionalization of Cellulose Paper with Diazo Compounds-Application to Hydrophobic Materials

“…Methods for the hydrophobization of cellulose paper rely on two main approaches . The first one is based on noncovalent coating mainly through inkjet printing, − dip coating ,− or spray coating, ,, atomic layer deposition, adsorption on cellulose pulp, and other coating processes. − In most of these methods, the compounds used to afford hydrophobic cellulose are either wax, modified silica particles, alkyl ketene dimers (AKD), polystyrene (PS), polytetrafluoroethylene (PTFE), or other fluorinated products. With these approaches, the physisorbed hydrophobic compounds frequently lack stability upon intensive uses, and most of the methods require two or more chemical steps, sometimes with drastic conditions involving supercritical CO 2 or plasma treatment.…”

Development of Cotton Fabrics via EVA/SiO2/Al2O3 Nanocomposite Prepared by γ-Irradiation for Waterproof and Fire Retardant Applications

“…There are countless combinations of coatings and fabrications methods for cotton fabrics to achieve different specifications for a wide spectrum of applications such as fabrication of reduced graphene oxide/silver nanoparticles onto cotton fabric for high electrical conductivity and superior electromagnetic shielding efficiency [36], the fabrication of highly durable electronic fabric for flexible electromagnetic performance via a facile dipping and drying method. which can address long term exposure towards the extreme environmental conditions both wet and dry media [37], fabrication of alkyl ammonium functional silsesquioxane /phytic acid complex as flame-retardant layer and hierarchicalstructured titanium oxide@polydimethylsiloxane composite as superhydrophobic layer were deposited and coated onto cotton fabrics was achieved for water-oil separation application [38], fabrication of superhydrophobic flame retardant coating using depositing method of diammonium phosphate solution, and H-ZrO 2 for good wear resistance, acid and alkali resistance and UV resistance excellent and flameretardant performance [39], fabrication of cotton fabric with fluoroalkylated oligomeric silica/triazine derivative nanocomposites for use in the separation membranes for the separation of oil/water [40], fabrication of superhydrophobic fabric by modifying the pristine fabric with silica nanoparticles prepared from tetraethoxysilane followed by amino-modified polydimethylsiloxane (PDMS) and through a dip-coating process for superhydrophobic and breathable textile applications [41], fabrication of a super-hydrophobic coating on cotton fabric via sol-gel process using super-hydrophobic glycidoxypropyltrimethoxysilane and 1,1,1,3,3,3-hexamethyl disilazane modified TiO 2 /SiO 2 coated cotton fabrics for oil-water separation [42], fabrication of textile with silver chloride nanoparticles under ultrasound irradiation was achieved for antibacterial activity [43].…”

Strongly Hydrophobic and Superoleophilic PMMA Based Nanocoated Cotton Fabrics

“…Moreover, diblock copolymers, poly[(methyl methacrylate)-b-(trifluoroethyl methacrylate)] (PMMA-b-PTFMA), and diblock copolymer of poly[(methyl methacrylate)-b-(lauryl methacrylate)] (PMMA-b-PLMA) have been grafted to the surface of cotton fabric to obtain superhydrophobic cotton fabric [46,47]. Recently, Yamashita et al [48] have developed superhydrophobic and superoleophilic cotton fabrics by surface modification using fluoroalkylated oligomeric silica/triazine derivative, which is rather complex chemistry.…”