scholarly journals The influence of surface finishing of Paulownia Siebold et Zucc. on the mechanical properties of lacquered surface

2010 ◽  
pp. 7-23
Author(s):  
Milan Jaic ◽  
Jovan Dobic ◽  
Tanja Palija
Keyword(s):  
Mechanical Properties ◽  
Abrasion Resistance ◽  
Scratch Resistance ◽  
Surface Finishing ◽  
Coating Application ◽  
Acrylic Coating ◽  
Acrylic Coatings ◽  
Paulownia Fortunei ◽  
Free Falling ◽  
Paulownia Elongata

This paper presents the research of influence of sanding, staining and the use of polyurethane and acrylic coating on the adhesion, scratch resistance and abrasion resistance of the coating. Objective was to determine the most important mechanical properties of lacquered surfaces, considering the application of Paulownia elongata and Paulownia fortunei, by using different systems of surface finishing. Cross cut method was used for measurement of adhesion. More accurate view of coating adhesion was obtained by measuring the scratch resistance. Abrasion resistance was tested by the method of free falling of abrasive particles. The applied system of sanding had no effect on the examined mechanical properties. Stained samples lacquered with PU coating showed better adhesion to the non-stained samples. Impact of staining on scratch resistance is not established. Stained samples showed greater resistance to abrasion for both wood species. Samples lacquered with PU coating showed the higher values of mechanical properties compared with samples lacquered with UV acrylic coating. Application of PU coating for surface finishing of Paulownia elongata and Paulownia fortunei is more adequate than the application of UV acrylic coatings, from the point of scratch resistance and abrasion resistance.

scholarly journals The impact of the top coating on the mechanical properties of lacquered wood surfaces

2012 ◽  
pp. 87-100
Author(s):  
Milan Jaic ◽  
Tanja Palija
Keyword(s):  
Mechanical Properties ◽  
Wood Species ◽  
Abrasion Resistance ◽  
Direct Contact ◽  
Quercus Robur ◽  
Scratch Resistance ◽  
Indentation Hardness ◽  
Polyurethane Coating ◽  
The Impact ◽  
Wood Surfaces

This paper investigates the impact of the top coating on the basic mechanical properties of a lacquered surface, including indentation hardness, scratch resistance and abrasion resistance. Three types of the top coating were used, including a 2K polyurethane coating, a 2K acrylate-isocyanate coating and a 2K alkyd-urethane coating. Samples of two wood species, spruce (Picea abies Karst.) and oak (Quercus robur L.), were used in this study, in order to determine whether the wood species, which is not in direct contact with the top coating, has an impact on the mechanical properties of a lacquered surface. The samples coated with a 2K acrylate-isocyanate coating showed the highest values of indentation hardness, in the samples of both wood species (1.34 N for spruce; 1.4 N for oak). The samples coated with a 2K alkyd-urethane coating showed the highest values of scratch resistance (20 N for both wood species) and abrasion resistance (mass loss of 480 mg after 700 cycles for both wood species). The results have shown that the wood species does not affect the value of indentation hardness, scratch resistance and abrasion resistance of a lacquered surface.

scholarly journals Effect of Wood Preservatives on Surface Properties of Coated Wood

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Turgay Ozdemir ◽  
Ali Temiz ◽  
Ismail Aydin
Keyword(s):  
Surface Roughness ◽  
Adhesion Strength ◽  
Abrasion Resistance ◽  
Castanea Sativa ◽  
Scratch Resistance ◽  
Surface Finishing ◽  
Wood Preservatives ◽  
Oriental Beech ◽  
Dry Film Thickness ◽  
Dry Film

Effect of wood preservatives (waterborne and organicborne) on the performance of surface finishing properties is investigated. Sapwood of scots pine, (Pinus sylvestrisL.), oriental beech (Fagus orientalisLipsky), and chestnut (Castanea sativaMill.) specimens (300 × 100 × 15 mm along the grain) were impregnated with aqueous solution of 2% CCA, 2% Tanalith E, 1% boric acid, and Immersol aqua. Surface roughness, dry film thickness, adhesion strength, gloss measurement, scratch, and abrasion resistance were determined according to related standards for treated and untreated samples. The results indicated that surface roughness and adhesion strength depended on wood species and the chemical composition of preservatives. Generally, waterborne wood preservatives increased the surface roughness of wood while the organic-based wood preservatives decreased it. The organic-based wood preservatives decreased adhesion but they increased gloss value. Wood preservatives did not affect the scratch resistance which was found to depend on properties of the coating. All the wood preservatives increased abrasion resistance.

scholarly journals Preparation of CNF/PDMS Superhydrophobic Coatings with Good Abrasion Resistance Using a One-Step Spray Method

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5380
Author(s):  
Jingda Huang ◽  
Peihao Cai ◽  
Mengmeng Li ◽  
Qiang Wu ◽  
Qian Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Abrasion Resistance ◽  
Substrate Surface ◽  
Cellulose Nanofibers ◽  
Scratch Resistance ◽  
Water Contact ◽  
Preparation Methods ◽  
Superhydrophobic Coatings ◽  
Spray Method ◽  
Complex Preparation

Complex preparation methods and weak mechanical properties of superhydrophobic coatings hinder their applicability. To address these problems, cellulose nanofibers (CNFs) were used as structural materials to augment the roughness properties, while polydimethylsiloxane (PDMS) was used as the adhesive. Based on the results of previous studies, superhydrophobic coatings with good mechanical properties can be prepared by spraying the mixture onto a substrate surface; herein, the mixture comprised modified CNFs and PDMS. The resulting coating possessed excellent superhydrophobicity, which allowed a maximum water contact angle (WCA) of 158°. Furthermore, it exhibited great knife-scratch-resistance properties and good abrasion performance, which was evaluated by abrading with 800-grit sandpaper for 19 cycles (abrasion length of 380 cm) under a 100 g load. Based on the simple operation and abrasion resistance, the coating shows great potential for practical application.

EVALUATING THE IMPACT OF MAINTENANCE TO ABRASION RESISTANCE AND TEAR STRENGTH OF COATED FABRICS

2016 ◽  
pp. 201
Author(s):  
Ada Traumann ◽  
Merje Beilmann ◽  
Diana Tuulik
Keyword(s):  
Mechanical Properties ◽  
Abrasion Resistance ◽  
Laboratory Tests ◽  
Water Resistance ◽  
Coating Application ◽  
High Durability ◽  
Coated Fabrics ◽  
The Impact ◽  
Drying Test ◽  
Domestic Care

The purpose of this paper was to evaluate the impact of maintenance to some mechanical properties of coated fabrics. Polyester is often used for outerwear because of its high durability. Coating application enhances several physical – mechanical properties of fabric. The reverse side of the test fabrics were laminated with a thin layer of the membrane to ensure complete water resistance. Since the micro-pores are sufficiently small, they will not let water through, but they let vapour through from inside to outside. It makes these kind fabrics vapour-permeable and therefore very comfortable for wearing. Although we can damage the micro-pores in the fabric very quickly whether by false maintenance mode at home for washing or drying. Test fabrics of this study were chosen from kid`s outerwear collection. Kids are good for testing of ready to wear garments but this time, the emphasis was on laboratory tests of basic fabrics. The aim of this study was to test the outer fabric under the conditions of domestic care and thereafter to carry out tests on abrasion resistance and tearing of cared fabrics.  

Size effect of R-TiO\(_{2}\) (Micro- and Nano-) Particles on the Mechanical Property, Weathering Durability of Water-based Acrylic Coating

2021 ◽  
Vol 31 (2) ◽  
pp. 219
Author(s):  
Thien Vuong Nguyen ◽  
Thi My Linh Dang ◽  
Tuan Anh Nguyen ◽  
Thi Huong Thuy Hoang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Weight Loss ◽  
Abrasion Resistance ◽  
Nano Particles ◽  
Accelerated Weathering ◽  
Acrylic Polymer ◽  
Water Based ◽  
Acrylic Coatings ◽  
The Difference

This work aims to clarify the difference between the influence of TiO\(_{2}\) particles at micrometer and nanometer sizes on the mechanical properties and weathering durability of water-based acrylic coatings. To prepare coatings, micro-R-TiO\(_{2}\) and nano R-TiO\(_{2}\) particles with 2 wt.% content were dispersed in the emulsion acrylic polymer by ultrasonic vibration. The coatings without TiO\(_{2}\) particles, with 2 wt.% micro R-TiO\(_{2}\) and with 2 wt.% nano R-TiO\(_{2}\) were tested for abrasion resistance, weathering aging in UV/CON accelerated weathering chamber. Weathering aging was assessed by IR quantitative analysis, the weight loss of the coating. The obtained results showed that the micro R-TiO\(_{2}\) with the 2 wt.% content enhanced simultaneously the abrasion resistance and weathering durability of water-based acrylic coatings but not as effectively as nano R-TiO\(_{2}\). Incorporation of 2 wt.% micro-R-TiO\(_{2}\) increased slightly the abrasion resistance of coating from 78.4 to 98.9 lite/mil (26% increase) while with addition of nano-R-TiO\(_{2}\) at the same content, the abrasion resistance was significantly improved from 78.4 to 129.3 lite/mil (65% increase). After 48 aging cycles, the alkane CH groups and weight of the coatings without R-TiO\(_{2}\) particles, containing 2 wt.% micro-R-TiO\(_{2}\), containing nano-R-TiO\(_{2}\) lost 34.2% and 17.4%; 23.8% and 13%; 13.7% and 13%, respectively.

Effects of abrasion on mechanical properties of Kevlar KM2-600 and S glass tows

2018 ◽  
Vol 89 (6) ◽  
pp. 989-1002
Author(s):  
A Abu Obaid ◽  
JW Gillespie
Keyword(s):  
Mechanical Properties ◽  
Abrasion Resistance ◽  
Glass Fibers ◽  
Fiber Surface ◽  
Surface Damage ◽  
Contact Length ◽  
Test Machine ◽  
Tension Level ◽  
Micro Cracks ◽  
Coating Removal

In this effort, the effects of abrasion on the mechanical properties of Kevlar KM2-600 and two types of S glass tows (AGY S2 and Owens Corning Shield Strand S) are studied. Data was generated from cyclic abrasion tests conducted at a tension level of 8% of failure load at10 mm/s (24 in/min) using a specially developed abrasion test machine. Fit curves for axial modulus and tenacity loss were established as a function of abrasion time/contact length for each tow type. Fiber surface damage and fiber breakage within the tows were identified as the major source of tow property degradation. Based on scanning electron microscopy measurements, glass fibers exhibited surface damage (micro-cracks and sizing/coating removal) that were more extensive in AGY S2 glass fibers. Kevlar KM2 fibers after tow abrasion tests exhibited fibrillation and peeling of broken fibrils from the fiber surface. In all three fibers, surface damage increased at longer abrasion times/friction contact length. Overall, the results indicated that the abrasion resistance is the highest for Kevlar KM2, followed by OCV Shield Strand and AGY S2 glass tows. The sizing material on OCV Shield Strand fibers contributed to the improved abrasion resistance compared to AGY S2.

scholarly journals Sialon and Alumina Modified UV-Curable Coatings with Improved Mechanical Properties and Hydrophobicity

Coatings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1424
Author(s):  
Mariola Robakowska ◽  
Łukasz Gierz ◽  
Hubert Gojzewski
Keyword(s):  
Mechanical Properties ◽  
Contact Angle ◽  
Inorganic Compounds ◽  
Surface Hydrophobicity ◽  
Scratch Resistance ◽  
Aluminum Oxynitride ◽  
Uv Curable ◽  
Scratch Hardness ◽  
Coating Surface ◽  
Inorganic Fillers

This article describes the modification of UV-curable coatings with silicon aluminum oxynitride (Sialon) and aluminum oxide (Alu C), which improve the hydrophobicity of the coating surface and the scratch hardness. The contact angle is greater due to surface roughness being enhanced with inorganic fillers. Improved scratch resistance results from the formation of a sliding layer triggered by the diffusion of Sialon or alumina on the coating surface. One can observed an increase in the surface hydrophobicity as well as in the scratch hardness (up to 100%) when small amounts (5 wt.%) of the inorganic compounds are added. Imaging microscopies, i.e., SEM, OM, and AFM (with nanoscopic Young’s modulus determination), revealed the good distribution of both types of fillers in the studied matrix.

scholarly journals Contents of the heavy metals nickel and lead in leaves of Paulownia elongata S.Y. Hu and Paulownia fortunei Hems. in Serbia

2009 ◽  
Vol 61 (4) ◽  
pp. 827-834 ◽  
Author(s):  
Dragica Stankovic ◽  
Ruzica Igic ◽  
Mirjana Sijacic-Nikolic ◽  
Dragica Vilotic ◽  
Slobodanka Pajevic
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Experimental Plot ◽  
Protection Zones ◽  
Pollution Research ◽  
Paulownia Fortunei ◽  
Urban Conditions ◽  
Paulownia Elongata

A comparative study was carried out on the capabilities of the two species Paulownia elongata S. Y. Hu and Paulownia fortunei Hems. as biomonitors of atmospheric (and soil) heavy-metal pollution. Research on content of the heavy metals nickel (Ni) and lead (Pb) in leaves of the species Paulownia elongata growing under urban and suburban conditions with the comparison to the concentration of these elements in leaves of the species Paulownia elongata and Paulownia fortunei on an experimental plot in Bela Crkva showed average nickel concentrations of 2.7 ?g/g on the experimental plot in Bela Crkva, Serbia, twice as low as the concentrations measured under extreme urban conditions (6.62 ?g/g, or 4.54 ?g/g in the immediate vicinity of suburban traffic lines). Inasmuch as Paulownia elongata endures urban conditions well, it can be recommended for cultivation in parks, tree alleys, and wind-protection zones along urban and regional traffic lines.

High Throughput Screening of Mechanical Properties and Scratch Resistance of Tricomponent Polyurethane Coatings

2019 ◽  
Vol 1 (11) ◽  
pp. 3064-3073 ◽  
Author(s):  
Ismael J. Gomez ◽  
Jie Wu ◽  
John Roper ◽  
Haskell Beckham ◽  
J. Carson Meredith
Keyword(s):  
Mechanical Properties ◽  
High Throughput ◽  
High Throughput Screening ◽  
Scratch Resistance ◽  
Polyurethane Coatings

Evaluating the Mechanical Properties of Waterproof Breathable Fabric Produced by a Coating Process

2019 ◽  
Vol 37 (4) ◽  
pp. 235-248
Author(s):  
Imene Ghezal ◽  
Ali Moussa ◽  
Imed Ben Marzoug ◽  
Ahmida El-Achari ◽  
Christine Campagne ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Flexural Strength ◽  
Abrasion Resistance ◽  
Coating Process ◽  
Outer Face ◽  
Coated Fabric ◽  
Spacer Fabric ◽  
Recovery Behavior ◽  
Breathable Fabric

The purpose of this research was to evaluate mechanical properties of a waterproof breathable fabric. A spacer knit with a cotton inner face and a polyester (PET) outer face was coated in order to obtain a waterproof breathable fabric. The applied coat was a mixture of an acrylic paste and a fluorocarbon resin. The treated fabric has undergone several tests to evaluate its mechanical properties. Tensile strength, flexural strength, abrasion resistance, and wrinkle recovery behavior were measured and discussed. After the coating treatment, the fabric was rigidified by 25% and 19% in wale and course directions, respectively. The coated PET face of the spacer fabric was not altered even after 125,000 abrasion cycles. A stiffer fabric was obtained after the coating treatment. However, fabric recovery behavior was ameliorated by 78% and 72% according to wale and course directions, respectively. The coated fabric can be used to produce raincoats and jackets.

Sign in / Sign up

Export Citation Format

Share Document