Modifications of Paper Surfaces with Composite SiOx/Polymer Coatings

2015 ◽  
Vol 731 ◽  
pp. 437-440
Author(s):  
Zhuang Liu ◽  
Lin Zhu ◽  
Zhi Hui Sun
Keyword(s):  
Contact Angle ◽  
Testing Machine ◽  
Composite Films ◽  
Chemical Characterization ◽  
Polymer Coatings ◽  
Tensile Testing Machine ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
The Individual

The composite SiOx/polymer films are deposited as a top-coatings onto the paper substrates by radio frequency (RF) reactive magnetron co-sputtered two targets, silica and dicyclopentadiene dioxide cured with maleic anhydride (DCPD/MA).The samples prepared by changing PSiO2/PDCPD/MA, the ratio of RF powers density delivered to the individual target from 0.1 to 10 so as to prepare different SiOxcontent coatings. The wettability, mechanical properties, color reproduction printability, chemical characterization of the coatings are discussed in this paper, using contact angle measurements, electronic tensile testing machine, off-set printing test and FTIR. The static contact angle of water ranges from 129.7 to 90.7 o and tensile performance has improved significantly as the ratio of RF powers density change from 0.1 to 10. The ink density and depth of color during off-set printing are visually improved by using papers with hydrophobic surfaces coated composite films.

Rf Sputtering of Composite Fluorocarbon/ZnO Films and their Basic Properties

2008 ◽  
Vol 373-374 ◽  
pp. 159-162 ◽  
Author(s):  
Yu Hui Zhang ◽  
Quan Ji ◽  
Xue Wang
Keyword(s):  
Contact Angle ◽  
Composite Films ◽  
Rf Sputtering ◽  
Static Contact Angle ◽  
Zno Films ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Structure Surface ◽  
Uv Visible

Composite fluorocarbon/ZnO films were deposited by R.F. sputtering using polytetrafluoroethylene (PTFE) and Zn target on polyethylene terephthalate (PET) substrate. Argon was used as the working gas and oxygen as reacting gas. The obtained films were characterized by AFM, UV-visible spectrophotometer, XPS and static contact angle measurements. The composite films are islands-structure composed of nanometer particles. Surface of the islands is not flat. The static contact angle of water is larger than 90°, possessing excellent hydrophobicity. The composite films exhibit multi-enhanced ultraviolet absorption due to π-π-conjugated molecular structure, surface morphology and nano-sized ZnO absorbing effect.

scholarly journals Precise Static Contact Angle Measurements Using Pythagolas Rule

2014 ◽  
Vol 15 (2) ◽  
pp. 57-62
Author(s):  
Jin-Yeong Choi ◽  
Dong-Jun Kwon ◽  
Zuo-Jia Wang ◽  
Pyeong-Su Shin ◽  
Joung-Man Park
Keyword(s):  
Contact Angle ◽  
Static Contact Angle ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements

Vertically aligned CNT arrays: structural integrity and surface properties

2016 ◽  
Vol 7 (6) ◽  
pp. 703-711 ◽  
Author(s):  
Dimitris K. Perivoliotis ◽  
Malamatenia A. Koklioti ◽  
Elias P. Koumoulos ◽  
Yiannis S. Raptis ◽  
Costas A. Charitidis
Keyword(s):  
Contact Angle ◽  
Structural Integrity ◽  
Mechanical Performance ◽  
Content Type ◽  
Cvd Method ◽  
Angle Measurements ◽  
Hydrophobic Behavior ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Cnt Arrays

Purpose Carbon nanotube-based architectures have increased the scientific interest owning to their exceptional performance rendering them promising candidates for advanced industrial applications in the nanotechnology field. Despite individual CNTs being considered as one of the most known strong materials, much less is known about other CNT forms, such as CNT arrays, in terms of their mechanical performance. The paper aims to discuss these issues. Design/methodology/approach In this work, thermal CVD method is employed to produce VA-MWCNT carpets. Their structural properties were studied by means of SEM, XRD and Raman spectroscopy, while their hydrophobic behavior was investigated via contact angle measurements. The resistance to indentation deformation of VA-MWCNT carpets was investigated through nanoindentation technique. Findings The synthesized VA-MWCNTs carpets consisted of well-aligned MWCNTs. Static contact angle measurements were performed with water and glycerol, revealing a rather super-hydrophobic behavior. Originality/value The structural analysis, hydrophobic behavior and indentation response of VA-MWCNTs carpets synthesized via CVD method are clearly demonstrated.

scholarly journals Specific ion modulated thermoresponse of poly(N-isopropylacrylamide) brushes

2016 ◽  
Vol 18 (8) ◽  
pp. 6037-6046 ◽  
Author(s):  
Ben A. Humphreys ◽  
Joshua D. Willott ◽  
Timothy J. Murdoch ◽  
Grant B. Webber ◽  
Erica J. Wanless
Keyword(s):  
Contact Angle ◽  
Static Contact Angle ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements

Specific anion identity and concentration dictates the direction and magnitude of the shift in LCST for a pNIPAM brush determined by in situ ellipsometry, QCM-D and static contact angle measurements.

scholarly journals A Facile Activation Method for Improving the Wettability of Polyurethane Surfaces

2019 ◽  
Vol 56 (2) ◽  
pp. 416-420
Author(s):  
Luiza Madalina Gradinaru ◽  
Stelian Vlad ◽  
Mioara Drobota ◽  
Maria Spiridon ◽  
Ioan Istrate
Keyword(s):  
Contact Angle ◽  
Polymer Surface ◽  
Bulk Properties ◽  
Polar Interaction ◽  
Polar Groups ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Polyurethane Film ◽  
Time Periods

This work reports the activation of polyurethane film surfaces in order to enrich them with polar groups such as -NH2, -OH, -COOH or radicals, which further allows immobilization of several bioactive compounds. UV-activation was used to introduce new groups on the polymer surface without affecting the bulk properties. The current arising species improve the wettability of the PU surfaces as it was observed from the static contact angle measurements. The structure and composition of the new PU surfaces were analyzed by using ATR-FTIR spectroscopy. The results suggested the possibility of modifying the PU surfaces in a shorter time periods, in order to provide many sites to attach other biomacromolecules by polar interaction or hydrogen bonding.

Ionizable polyol from cottonseed oil for anionic waterborne polyurethane-silanol dispersions

2019 ◽  
Vol 10 (4) ◽  
pp. 77-94
Author(s):  
Sashivinay Kumar Gaddam ◽  
Aruna Palanisamy
Keyword(s):  
Contact Angle ◽  
Soft Segment ◽  
Testing Machine ◽  
Waterborne Polyurethane ◽  
Cottonseed Oil ◽  
Average Particle ◽  
Water Contact ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Synthetic Methodologies

A novel cottonseed oil-based ionizable polyol was introduced as ionic soft segment in waterborne polyurethane dispersion (PUD) synthesis. The ionizable polyol was synthesized by ring opening of epoxidized cottonseed oil (ECSO) with 4-aminobenzoic acid (PABA) and blended with hydroxylated cottonseed oil polyol (HCSO) in different weight ratios to develop a series of mixed polyols having different hydroxyl numbers viz., 146, 130 and 114 mg KOH/g. Three different PUDs were synthesized using the mixed polyols, isophorone diisocyanate, and 3-aminopropyltriethoxysilane. The chemical structure, thermo-mechanical properties, and surface properties of cured PUD films were examined using Fourier-transform infrared spectroscopy (FTIR), Dynamic mechanical thermal analysis (DMTA), universal testing machine (UTM) and contact angle measurements respectively. The effect of Si–O–Si cross-linking network density, which increases with an increase in OH values of the mixed polyol was also investigated. All the PUDs prepared in this study exhibited good storage stability (>4 months), and the average particle sizes of PUDs ranged from 18 to 124 nm. The highest hydroxyl mixed polyol derived PUD film (PUD-35 film) exhibited high thermal stability, mechanical strength; Tg value, water contact angle value, chemical, and abrasion resistance properties due to the extended siloxane cross-link network structure. The introduction of ionizable polyol into the soft segment led to an improvement in hard and soft segment phase mixing of PUDs, and this strategy could enrich the exploration of new synthetic methodologies in the field of bio-based PUD manufacturing.

Tuning the Surface Properties of Elastomers Using Hydrocarbon-Based Mechanically Assembled Monolayers

2001 ◽  
Vol 710 ◽  
Author(s):  
Kirill Efimenko ◽  
Jan Genzer
Keyword(s):  
Contact Angle ◽  
Fine Structure ◽  
Surface Structure ◽  
Surface Properties ◽  
Molecular Orientation ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Assembled Monolayers ◽  
Excellent Stability

ABSTRACTWe use static contact angle measurements and near-edge absorption fine structure to elucidate the surface structure and molecular orientation of hydrocarbon-based mechanically assembled monolayers (H-MAMs), structures formed by combination of assembly of alkyl moieties onto flexible elastomeric substrates and mechanical manipulation of the substrates. Specifically, we report that the organization of the grafted molecular array (“liquid”-like vs. solid-like) can be tailored by varying the degree of stretching of the elastomeric substrate. We also show that the H-MAM surfaces exhibit excellent stability.

PREPARATION AND PROPERTIES OF NANOCOMPOSITE FROM NR AND NATURAL NA+-MONTMORILLONITE

2020 ◽  
Vol 93 (2) ◽  
pp. 286-296
Author(s):  
N. T. Thuong ◽  
N. P. D. Linh ◽  
C. H. Ha ◽  
P. T. Nghia ◽  
S. Kawahara
Keyword(s):  
Electron Microscopy ◽  
Tensile Testing ◽  
Testing Machine ◽  
Nanocomposite Materials ◽  
Water Soluble ◽  
Tensile Testing Machine ◽  
Angle Measurements ◽  
Transmission Electron ◽  
Contact Angle Measurements ◽  
High Ammonia

ABSTRACT NR/Na+-montmorillonite (NR/Na+-MMT) nanocomposites were prepared through mixing in the latex stage. NR/Na+-MMT nanocomposites with various amounts of Na+-MMT were fabricated using three types of NR latexes: fresh NR (FNR), high ammonia NR, and deproteinized NR latex. The Na+-MMT and NR latexes were characterized by particle size distribution and Fourier transform infrared spectroscopy analyses. The nanocomposite materials were then analyzed by scanning electron microscopy, transmission electron microscopy, and contact angle measurements. The mechanical properties of the resulting products were measured by tensile testing machine. The composite prepared from FNR gave the best tensile strength at 3 phr MMT loading. The outstanding properties are proposed to be due to the contribution of the water-soluble compounds present in FNR that possess similar hydrophilicity to Na+-MMT.

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