scholarly journals Effects of Nano-silica/Nano-alumina on Mechanical and Physical Properties of Polyurethane Composites and Coatings

2013 ◽  
Vol 14 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Sarojini Swain ◽  
Ram Avatar Sharma ◽  
Subhendu Bhattacharya ◽  
Lokesh Chaudhary
Keyword(s):  
Physical Properties ◽  
Nano Silica ◽  
Nano Alumina ◽  
Mechanical And Physical Properties ◽  
Polyurethane Composites

scholarly journals Mechanical and physical properties of teak leaves waste/polyurethane composites for particleboard application

2020 ◽  
Vol 29 ◽  
pp. 2633366X2096250
Author(s):  
Masturi ◽  
WN Jannah ◽  
RM Maulana ◽  
T Darsono ◽  
Sunarno ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Physical Properties ◽  
Water Absorption ◽  
Raw Material ◽  
Industrial Scale ◽  
Test Results ◽  
Polyurethane Composite ◽  
Mechanical And Physical Properties ◽  
Value Of Water ◽  
Polyurethane Composites

A teak leaf waste/polyurethane composite has been made for particleboard application. Some fraction variations are performed on the use of polyurethane as a matrix with a range of 0.04–0.20 (w/w). Mechanical and physical properties have been tested on the composites produced. The test results showed that the highest compressive strength of the sample reaches 38.5 MPa for polyurethane fraction of 0.14 (w/w). The composite has a density of 1261 kg m−3 which is in accordance with the result of density on teak. The physical properties have been also investigated and it was found that the lowest value of water absorption is 1.38%. This result indicated that the composites produced are potentially to replace wood raw material in eco-friendly industrial scale.

scholarly journals Effect of water absorption on some mechanical and physical properties of epoxy/polyurethane blend reinforced with nano silica powder

2019 ◽  
Vol 15 (32) ◽  
pp. 92-98
Author(s):  
Rana M. Salih
Keyword(s):  
Thermal Conductivity ◽  
Diffusion Coefficient ◽  
Impact Strength ◽  
Flexural Strength ◽  
Physical Properties ◽  
Nano Silica ◽  
Silica Powder ◽  
Mechanical And Physical Properties ◽  
The Impact ◽  
And Diffusion

The aim of this work is to evaluate some mechanical and physicalproperties (i.e. the impact strength, hardness, flexural strength,thermal conductivity and diffusion coefficient) of(epoxy/polyurethane) blend reinforced with nano silica powder (2%wt.). Hand lay-up technique was used to manufacture the compositeand a magnetic stirrer for blending the components. Results showedthat water had affected the bending flexural strength and hardness,while impact strength increased and thermal conductivity decreased.In addition to the above mentioned tests, the diffusion coefficientwas calculated using Fick’s 2nd law.

PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

2012 ◽  
Vol 4 (1) ◽  
pp. 1
Author(s):  
Djoko Purwanto
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Physical Properties ◽  
Treatment Process ◽  
Acacia Mangium ◽  
Physical And Mechanical Properties ◽  
Wood Fibers ◽  
Test Parameters ◽  
Mechanical And Physical Properties ◽  
Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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