Development and characterization of thin polymer films relevant to fiber processing

Song, Junglong; Liang, Jintao; Liu, Xiaomeng; Krause, Wendy E.; Hinestroza, Juan P.; Rojas, Orlando J.

doi:10.1016/j.tsf.2009.03.015

Cited by 62 publications

(55 citation statements)

References 28 publications

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“…This fact may be explained by other contributions such as surface roughness, that is, 1.8, 1.1, 0.8, and 0.1 nm for PP, PET, nylon, and silica, respectively, as reported in earlier work. 29 The friction coefficients were reduced sharply after addition of the silicone lubricant followed by rinsing with water. Interestingly, the trend in the coefficient of friction as a function of substrate hydrophobicity was reversed; that is, the more hydrophobic substrates yielded lower coefficients of friction.…”

Section: Resultsmentioning

confidence: 99%

Surface and Friction Behavior of a Silicone Surfactant Adsorbed on Model Textiles Substrates

Liu

Song

et al. 2010

Ind. Eng. Chem. Res.

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This study reports on interactions of an amphiphilic block copolymer of polyalkylene oxide-modified poly(dimethylsiloxane) with thin films of polypropylene (PP), polyethylene terephthalate (PET), and nylon, as well as with reference hydrophilic silica surfaces. The dynamics of adsorption, adsorbed mass, and viscoelasticity of the adsorbed layer are quantified by using a quartz crystal microbalance, while boundary layer lubrication behaviors are studied by using lateral force microscopy. Driven by hydrophobic interactions, the silicone surfactant adsorbs following a Langmuir isotherm and forms strongly adsorbed layers on the polymer surfaces with an areal mass directly related to the hydrophobicity of the substrate. The self-assembled silicone surfactant molecules improve significantly wettability and lower friction. The results reported herein will broaden our understanding of lubrication phenomena in textile and fiber processing applications.

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Section: Resultsmentioning

confidence: 99%

Surface and Friction Behavior of a Silicone Surfactant Adsorbed on Model Textiles Substrates

Liu

Song

et al. 2010

Ind. Eng. Chem. Res.

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“…There is an abundance of literature about this topic and the reader is referred to the review by Konturri et al for an excellent account on the subject (Kontturi, Tammelin et al 2006). Here we limit ourselves to spin coated films of cellulose prepared on silica or gold substrates according to a procedure reported elsewhere (Gunnars, Wagberg et al 2002;Falt, Wagberg et al 2004) and modified slightly as follows (Song, Liang et al 2009): Cellulose solution was prepared by dissolving microcrystalline Avicel cellulose in 50%wt water/N-methylmorpholine-N-Oxide (NMMO) at 115 • C. Dimethyl Sulfoxide (DMSO) was added to adjust the concentration (0.05%) and the viscosity of the cellulose suspension. Polyvinylamine (PVAm) was used as anchoring polymer of the cellulose film.…”

Section: Cellulose Thin Filmsmentioning

confidence: 99%

Tools to Probe Nanoscale Surface Phenomena in Cellulose Thin Films: Applications in the Area of Adsorption and Friction

Song

Hinestroza

et al. 2009

The Nanoscience and Technology of Renewable Biomaterials

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Under appropriate conditions the acidic and basic groups in polyampholytes dissociate in aqueous solution producing ionic groups and their respective counterions. If the ionic groups on the polymer chain are weak acids or bases, the net charge of the polyampholytes can be changed by varying the pH of the aqueous medium. At the isoelectric point (IEP), the number of positive and negative charges on the polyion is the same, giving a net charge of zero. In the vicinity of the isoelectric pH, the polymers are nearly charge-balanced and exhibit the unusual properties of amphoteric molecules. At conditions of high charge asymmetry (far above or below the isoelectric pH), these polymers exhibit a simple polyelectrolyte-like behavior (

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“…Thin films prepared by the spin coating technique is one of the best techniques to prepare organic film owing to its efficiency and reproducibility [12]. The films prepared by spin coating are influenced by factors such as concentration of the film-forming materials, molecular weight and solvent type (viscosity, density and surface energy), spinning rate, and operation temperature [13,14].…”

Section: Introductionmentioning

confidence: 99%

Processing and characterization of extruded PET and its r-PET and MWCNT nanocomposite thin films by spin coating

Singh

Deshpande

2016

Bull Mater Sci

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The objective of the present study was basic understanding of the formation of thin film morphology by spin coating using reorganized polyethylene terephthalate (r-PET) and multiwalled carbon nanotubes (MWCNTs) as fillers in PET. A study of the correlation between physical properties of the PET films and its surface morphology was carried out using atomic force microscopy-based power spectral density (PSD) analysis. No significant work of surface analysis, using PSD of thin films of PET has been reported till date. Dilute solution of PET, PET with 3 wt% (r-PET) and PET with 3 wt% (2 wt% r-PET + 1 wt% MWCNT) filler were prepared using trifluoroacetic acid (TFA) as a solvent and thin films were fabricated on glass substrate by the optimized spin coating technique. Preparation of r-PET and r-PET+ MWCNT fillers was obtained by the precipitation method using TFA as a solvent and acetone as an antisolvent. The samples before spin coating were extruded and for comparison, a film of non-extruded PET was also prepared. Structural studies by Fourier transform infrared and X-ray diffraction show higher degree of crystallinity in r-PET and decrease in chain entanglements. Owing to the crystallizing behaviour of r-PET, it allows better dispersion of MWCNT in the polymer matrix as compared with PET. The samples with fillers of MWCNT show more compact and unique mesh-like globular structure, indicating application for electromagnetic shielding foams and fibres.

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Development and characterization of thin polymer films relevant to fiber processing

Cited by 62 publications

References 28 publications

Surface and Friction Behavior of a Silicone Surfactant Adsorbed on Model Textiles Substrates

Surface and Friction Behavior of a Silicone Surfactant Adsorbed on Model Textiles Substrates

Tools to Probe Nanoscale Surface Phenomena in Cellulose Thin Films: Applications in the Area of Adsorption and Friction

Processing and characterization of extruded PET and its r-PET and MWCNT nanocomposite thin films by spin coating

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