1. Can the redispersion of PTFE dispersion (60% in H2O) in DI water is possible? If not, then how to use 5% PTFE binder from 60% stock dispersion?

27 March 2023 1 9K Report

PTFE dispersion (60% in H2O) stock solution.

Dear Faiza B.

It is possible to redisperse PTFE dispersion in DI water, but the process may require some additional steps to ensure proper dispersion and stability. Here are some general guidelines:

First, check the stability of the 60% PTFE dispersion. If the dispersion has been sitting for a while or has undergone any changes in temperature or other conditions, it may have destabilized, which can affect the redispersion process.

If the PTFE dispersion has destabilized, it may be necessary to add a dispersant or surfactant to help stabilize the dispersion and prevent clumping or settling. Common dispersants for PTFE dispersions include polyvinyl alcohol (PVA) and polyethyleneimine (PEI).

To redisperse the PTFE dispersion, mix the dispersion gently with DI water in a ratio of about 1:1.5 or 1:2 (dispersion to water) and stir the mixture gently for several hours. You can also use ultrasonic agitation to help disperse the PTFE particles more evenly in the water.

Once the PTFE dispersion has been redispersed in DI water, you can use it to prepare a 5% PTFE binder solution by diluting the dispersion with additional DI water in the appropriate ratio. For example, to prepare a 5% PTFE binder solution from a 60% dispersion, you would need to dilute the dispersion with DI water in a ratio of 1:12 (dispersion to water).

It is important to note that the quality of the PTFE binder solution may be affected by the redispersion process, and it may be necessary to test the solution for its stability and performance before using it in your application.

Overall, while it is possible to redisperse PTFE dispersion in DI water, it may require some additional steps to ensure proper dispersion and stability. Adding a dispersant, using gentle mixing and ultrasonic agitation, and diluting the dispersion appropriately can help to ensure a successful redispersion process.

Badges
Science topic

More Faiza B.'s questions See All

Runs of nucleotides in Sanger sequencing?

I performed site directed mutagenesis, transformation, and then I sent out plasmids for Sanger sequencing and found out that there is extension of DNA just before the stop codon. I am not sure...

27 February 2021 547 3 View

Suggest me some trending topics for phd research in text mining/AI/machine learning?

My master's research is in info retrieval and text mining. I would be grateful if you could help me to select a good topic for my phd research proposal.

24 February 2021 393 14 View

RNA-seq DEGs downstream analysis and reporting in literature?

I used EdgeR to get the list of DEGs (differentially expressed genes) from my liver RNA-seq experiment. I have done the gene overrepresentation and GSEA based pathway analysis. I am currently...

23 February 2021 8,969 1 View

What is the best method to evaluate and measure non-circulating estrogen levels in mice ?

Could anyone suggest me the best procedure to measure the circulating estrogen levels in mice ? I came across the general methods where it can be measured in serum or urine but a detail suggestion...

22 February 2021 4,352 2 View

Helicoverpa armigera eggs are not hatching in lab condition, why?

Dear RG friends, I am providing a complete H. armigera diet for larvae and maintaining the eggs in the growth chamber as well as in-room conditions. But since three months, eggs laid from the...

21 January 2021 5,546 32 View

Why am I getting 2 bands for Gibson Cloning Vector PCR?

Hi, I designed Gibson primers (2 primers for fragment and 2 primers for vector) using snapgene. Then I ran PCR separately for Fragment and Vector. Fragment DNA was found to be the correct sized...

11 January 2021 9,500 2 View

Was there any pesticide disasters other than Bhopal and Kasaragood tragedy around the globe?

Pesticides become prime compo in agricultural activities to meet the growing demand of the human population. But indiscriminate usage and mishandling led to two disasters in India such as Bhopal...

11 January 2021 3,790 7 View

Which is the most recent and updated classification of Class: Insecta?

Based on the many publications from several decades, we came across many classifications of Insects. Among them which one is more updated and approved classification that can be used for research,...

05 January 2021 3,668 9 View

Can we mix elemental powders of 325 mesh using an agate mortar and pestle?

Elemental Powders like Titanium, vanadium, tungsten, zirconium, hafnium.

04 January 2021 7,357 1 View

How can we say a species of insects got extinct?

02 January 2021 4,232 10 View

What is involved in morphological changes of SEM images of a substance?

In the sem analysis of CaCO3 nanaoparticles, the morphology images showed spherical shaped particles but the proposed morphology for these type of nanoparticles is trigonal. I prepared the...

01 March 2021 1,960 4 View

Have you ever experiencing air vent trouble in fermentation process?

Dear all, My research group is currently working with a 12-litre fermenter. Somehow, if we do the fermentation for more than 20 hours, the process will be more prone to contamination. Our current...

23 February 2021 1,908 2 View

Can anyone please suggest where I can find a reference for ReaxFF parameters for PTFE(Teflon) suitable for use in LAMMPS?

Trying to simulate a ice-PTFE interaction and am unable to find a reference which actually lists out forcefield parameters for PTFE-PTFE interactions using ReaxFF or even other force fields like...

08 February 2021 9,373 2 View

What is the average lifetime of ODLAB acid inert heating plates?

Dear Colleagues, common hotplates have a short lifetime when used for acid digestion of rock/mineral samples. PTFE/graphite coated hotplates are much more expensive and should live much more than...

21 January 2021 1,208 3 View

How the wave dispersion occurs in the medium?

We know that when waves (light or seismic waves) penetrate inhomogeneous media or media with structures, they will diverge. This is because waves are composed of components with different...

11 January 2021 7,448 3 View

How linear energy dispersion relation can be understood as the result of massless particle in Dirac semimetal's energy diagram?

Inverse of electron's effective mass can be obtained as second derivative of energy for k. On the other hand, linear dispersion gives value of zero for second derivative since second derivative...

07 January 2021 5,623 2 View

R package for multivariate dispersion as a measure of beta diversity?

Hello, everyone: I've been reading some old and new papers on how to compute beta diversity using incidence or abundance data from several assemblages/communities. For my data, I am interested...

03 January 2021 9,293 1 View

Hi, Anyone knows how to get the sagebrush tracer experiment data for model validation?

Dataset for dispersion hysplit model

30 December 2020 4,984 1 View

How does the nanoparticle concentration affect the Hydrodynamic size in Millique water ?

I am doing a time based study and at the initial hours , i am getting considerable high values of hydrodynamic size. The concentration is very low in the range of 3-10ppm and the nanoparticles are...

30 December 2020 5,971 3 View

No title

I want to perform an interaction study between the Fe cation of a hemo group and an organic molecule. To do this, I want to use Grimme's dispersion correction with Becke-Johnson Damping (D3-BJ) to...

10 December 2020 2,067 3 View