Fabrication and characterization of hydrophobic thin polytrifluoroethyl methacrylate adhered coating on cotton surface via amicellar polymerization (original) (raw)
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Hydrophobic thin fluoropolymer coating on cotton surfaces
International Journal of Polymer Analysis and Characterization, 2018
We report a simple novel procedure to prepare hydrophobic cotton textiles by admicellar polymerization. By in situ introducing fluoropolymer on cotton fibers to generate a dual-size surface roughness, followed by hydrophobization with a little amount of fluoromonomer Octafluoropentamethyl methacrylate (OFPM) with short time, normally hydrophilic cotton has been easily turned into hydrophobic. Hydrophobic cotton textile exhibits a static water contact angle of 124° for a 10 µl droplet. When an octa fluoroalkyl chain is introduced to the cotton surface, the originally smooth surface changed immediately to rough surface which is the key factor for hydrophobicity like lotus leaves.
International Journal of Polymer Analysis and Characterization, 2018
The fluorinated poly(trifluoroethylmethacrylate) thin polymers were successfully prepared through free radical initiating admicellar polymerization approach using fluorosurfactant and 2,2,2-trifluoroethylmethacrylate (TFEM, monomer) system, which was initiated with potassium persulfate (KPS) initiator. The structure of the resultant polymer and morphology of the modified cotton fabric surfaces were confirmed by SEM and EDX analysis. The surface wettability of the modified cotton fabric was characterized by a water drop stay time and contact angle (CA) measurement. The coated cotton fabric exhibited excellent hydrophobicity with a water contact angle of 137.79°.
The Journal of The Textile Institute, 2019
Herein, a hydrophobic polyfluoroacrylate adhered cotton fabric having a smart affair with water under oil, is developed using a simple surfactant-assisted polymerization technique commonly known as admicellar polymerization of low surface energy trifluoroethyl acrylate monomer. The hydrophobicity of the treated substrates was determined by the contact angle. The results show that the cotton fabric became hydrophobic. The surface investigation conducted by scanning electron microscopy (SEM) provided distinctive features of the untreated and treated fabric samples. The elementary analysis was also carried out on the substrate through energy dispersive X-ray to confirm the presence of hydrophobic groups. In addition to this, the hydrophobic cotton fabric shows excellent durability against home laundering and simple adhesive peel testing.
Surface Engineering, 2020
Hydrophobic cotton fabric with a very high contact angle and low sliding angle hysteresis was prepared using a single-pot coating solution containing fluorosurfactant (FS 61) and fluoromonomer (octafluoropentylacrylate, OFPA). In this study, fluorine-based acrylate ester monomer was polymerized on cotton fabric by admicellar polymerization to make the cotton surface profoundly rough and, furthermore, very hydrophobic with high contact angle value, 144 ± 2 o. The surface morphology was determined using electron microscopy (SEM) and atomic force microscopy (AFM). Modified washing durable hydrophobic cotton fabric provides an innovative and novel pathway for the practical application of self-cleaning textiles and dense solvent removal. It had excellent stability against daily household used liquids and even in a hazardous condition.
Water repellent cotton surface through admicellar polymerization - a ZnO/fluoromonomer system
Journal of emerging technologies and innovative research, 2017
This article reports the coating of fluorinated polymer with dispersion of zinc oxide nanoparticle to create both phase hydrophobicity using a simplistic way admicellar polymerization. Among the various methods used previously this polymerization technique provides tremendous result to impart hydrophobicty with short time. This polymeric coating showed the contact angle is 146 0. FT-IR analysis shows the presence of C-F bond. The surface morphology was examined by SEM, XRD analysis. XRD analysis demonstrates the presence of nanoparticle and SEM analysis revealed the distribution of nanoparticle on the cotton surface. TGA is used to show the temperature stability. Beside these wetting times, contact angle measurements confirmed the formation of thin layer of nanoparticle fluorine moieties on the cotton surface.
Applied Surface Science, 2016
Three novel fluorinated methacrylate monomers with siloxyl bridging perfluoroalkyl groups were synthesized and characterized. Afterwards, the corresponding polymethacrylate latexes, namely monofluoroalkylsiloxyl polymethacrylate (PMFSMA), bisfluoroalkylsiloxyl polymethacrylate (PBFSMA) and trisfluoroalkylsiloxyl polymethacrylate (PTFSMA), were prepared and coated onto cotton fabrics to make them water-repellent. Particle size, particle size distribution, zeta potential and high-resolution transmission electron microscope (TEM) were tested to assess the emulsion stability and particle morphology. Thermal properties of PTFSMA were evaluated by thermal-gravimetric analysis (TGA). Surface properties of the coated cotton fabrics were characterized by Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), water contact angle (WCA), adhesive force and X-ray photoelectron spectroscopy (XPS). It was found that the incorporation of more perfluoroalkyl chains and the annealing process could decrease the surface free energy of polymer film to 13.7 mN/m. Furthermore, the EDS spectra of PTFSMA film after annealing showed an enrichment of fluorine in the film-air interface.
Modification of silk surface by polymerization of fluoro-monomer in fluoro-surfactant solution
2020
Polymer and Textile Research Laboratory, Department of Chemistry, Sidho-Kanho-Birsha University,<br> Purulia-723 104, West Bengal, India<br> Department of Zoology, Lady Brabourne College, Suhrawardy Avenue, Beniapukur, Kolkata-700 017, India<br> *E-mail: jayantajune@gmail.com<br> Manuscript received online 01 December 2020, accepted 20 December 2020 Non-wettability is a renowned avenue for designing a vast array of smart and advanced materials. In this context, water-repellent<br> surfaces have been prepared. Thin polymer coatings were successfully fabricated on silk surfaces through the admicellar<br> polymerization technique by using fluoro-surfactant and 1H,1H,2H,2H-perfluorodecyl acrylate (PFDA monomer) system and<br> potassium persulfate (K<sub>2</sub>S<sub>2</sub>O<sub>8</sub>) as an initiator. The water-repellent properties induced to the treated surface were examined<br> by analyzing the halt...
European Polymer Journal, 2010
A series of coating materials were prepared from two classes of hyperbranched polymers containing short fluorocarbon chains (HPEFs/HPUFs). The obtained hyperbranched polymers were characterized by FT-IR, 1 H NMR, 13 C NMR, 19 F NMR, GPC and TG analyses. HPEFs/HPUFs exhibited very low surface free energies (13.67-24.49 mJ/m 2 ) which almost are independent of their internal backbone but dependent on the terminal fluorocarbon chains. Highly hydrophobic and/or oleophobic surfaces of cotton woven fabric can be achieved from these polymers by solution-immersion coating method. The static and dynamic wettabilities of the HPEFs/HPUFs treated fabrics have been investigated. The static contact angles reached to 146°, 122°and 102°for water, hexadecane and decane, respectively. The lowest contact angle hysteresis reached to 5.9°.
Polymer, 2013
Two fluorinated diblock copolymers were prepared, characterized, and used to coat cotton fabrics. These copolymers included poly [2-(perfluorohexyl)ethyl acrylate]-block-poly[(triisopropyloxysilyl)propyl methacrylate] (PFHEA-b-PIPSMA) and poly [2-(perfluorohexyl)ethyl acrylate]-block-poly(glycidyl methacrylate) (PFHEA-b-PGMA). The PFHEA block provided the coatings with a low surface tension to help impart water-repellency, while the PIPSMA or PGMA blocks (bearing alkoxysilane or epoxide groups, respectively) allowed the anchoring of the copolymers onto the cotton fibers. A simple coating procedure was used to yield water-repellent cotton fabrics. Water contact angles were measured to evaluate the durability of the treated cotton fabrics after they had been subjected to extraction, washing and laundry tests. These results revealed that cotton fabrics coated with PFHEA-b-PIPSMA were rendered hydrophobic, but their stability was relatively poor. Meanwhile, cotton fabrics coated with PFHEA-b-PGMA exhibited water contact angles higher than 150 and retained their water-repellency even under harsh test conditions.
Super-Hydrophobic Cotton Fabric Prepared Using Nanoparticles and Molecular Vapor Deposition Methods
Functional Materials from Renewable Sources, 2012
Cotton fabric was functionalized with nanoparticles vapor deposition (NVD) of Al2O3 followed by molecular vapor deposition (MVD) of (tridecafluoro-1,1,2,2,-tetrahydrooctyl)- trichlorosilane (FOTS). The nanoparticles deposition increased the surface roughness, leading to higher contact angles. The morphology of the treated surfaces was observed with scanning electron microscopy. Fourier-transform infrared (FT-IR) analysis of the functionalized surfaces showed the presence of peaks corresponding to C-F, CF2, Al-O, and O-Al-O. Dynamic water contact angles were measured in order to assess the hydrophobic properties of the functionalized surface. Dynamic contact angles higher than 150° were obtained for water. In addition, samples treated with nanoparticles and FOTS layer showed low hysteresis when measuring advancing and receding contact angles.