Lay sequence for composite manufacturing?

Surfboards consists of a foam (lightweight) core and a fiberglass (stiffness) skin. Wet hand-layup is the most commonly used manufacturing method, several layers of fibre glass fabric are laid up...

11 December 2018 6,123 3 View

Possible techniques to measure the pore size of an electrospun mesh?

The most commonly reported technique in the literature to measure pore size is by SEM. However, I am doubtful regarding the accuracy of this technique for various reasons, the primary one being,...

07 August 2017 6,668 6 View

Rotary evaporation prior to freeze drying to reduce amount of water in a nano cellulose suspension?

07 August 2016 7,220 2 View

No title

31 December 2014 8,820 17 View

How can I obtain aligned nanofibers by ES?

I tried to electrospin a magnetized polymer solution in the presence of a magnetic field but did not get any alignment at all. The setup I use is quite simple, 2 magnets are placed paralled to...

11 December 2014 8,513 13 View

How can I disperse magnetic nano particles in PVA?

I have been trying to disperse Fe304 nanoparticles in PVA solution by using a bath sonicator for 12-15 hours. After sonication, upon doing TGA analysis (in Nitrogen) to check for the percent of...

10 November 2014 1,479 8 View

Why am I getting electrospraying during electrospinning?

I was trying to spin a 20%Polystyrene solution (solvent used is DMF). One problem I have been facing recently is electrospraying, When I start the electrospinning process fibers form in the...

08 September 2014 9,239 10 View

Can anyone assist with an appropriate solvent for polystyrene - electrospinning?

I am electrospinning polystyrene, up until now i used dmf as the solvent but due to the high bp of dmf it does not completely evaporate resulting in thick/webbed fibers. I tried using DMSO, but...

08 September 2014 5,445 5 View

What is the best solvent for base polyaniline and polystyrene?

I am making a PS/PANI blend. I have used DMF as the solvent, initially i try to dissolve PANI in it (ultrasonication), and then add PS and stir till i get a clear solution. However the problem is,...

08 September 2014 8,477 19 View

Is anyone familiar with the handling of electrospun nanofibres sheet/mesh?

I get a nice uniform sheet of electrospun nanofibres, however after some time when it dries out the sheet starts cracking into pieces, making it very hard to transfer the sheet onto something...

08 September 2014 9,255 16 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

How climate change will influences human and animal behavioral change?

The role of climate change influencing the human behavior as well as economics interest

01 June 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

what is the simplest definition of ion exchange capacity

What this unit identifies for the ion exchange capacity ca. 0.92 meq. g-1. I am a newcomer in the membrane area. I just started. I highly appreciate your help

08 May 2021 0 0 View

flexibility of polymers chain

effect of double bond on the flexibility of polymers

07 April 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

Formulation of polymer color flakes

I am writing to request some information for making polymer color flakes. I would appreciate the help.

17 March 2021 0 0 View

Can we classify HV and LV lines based on line length?

I have dataset which shows the length of power lines. I need to classify the lines based on the line length. Is there a rule to classify the High voltage (HV) and low voltage (LV) lines based on...

03 March 2021 4,116 4 View