Public Lab Research note


First "PIG Oil Only Absorbent Mat Pad" Test

by Matej | December 21, 2015 08:43 | 163 views | 3 comments | #12536 | 163 views | 3 comments | #12536 21 Dec 08:43

Read more: publiclab.org/n/12536


Matej was awarded the Basic Barnstar by warren for their work in this research note.


What I want to do

Here is the first test of the PIG Oil Only Absorbent Mat Pad. I was testing the PIG trimmed to 7” 1/4” surface area using 1:40 ratio of water and 80W90 oil (6ml of 80W90 and 1 cup of water), attempting to recover as much pure product oil as possible.

My attempt and results

Unboxing... :-) this is how they actually ship them. Pic.1

unboxing.jpg

The mats are about 1/8" thick, made of multiple soft layers. Most distinct are 3. Two on the surface and one in the middle. Between them is cotton like soft material. They feel waxy. The mat left a little bit of some sort of transparent oil/wax like residuum on my fingers. After a while it felt little skin irritating so I decided to use gloves. Overall they seem to be dry. Pic.2

23250468713_a64f356dac_o.jpg

I filled the container with 1 cup of tap water. Pic.3

fig3-0.jpg

I dripped 6ml of 80W90 oil across the container, attempting for balanced distribution. Pic.4

fig3-1.jpg

Placed the mat on the top. Pic.5

fig4.jpg

Oil absorbance was much slower than expected. No water intrusion observed. Pic.6 is showing how it looked like in first two minutes of the experiment. Pic.6

23582363830_e91d723915_o.jpg

Here within first 5 min Pic.7

23769672202_fa5eb38bdf_o.jpg

And here after 20 min. Pic.8

23582531290_6c91e31203_o.jpg

Seems like the oil started to soak in thru the the small holes and sides of the mat. Never made it directly thru the intact material. Pic.9

23582289680_e64498be6d_o.jpg

Bottom soaked the larger oil drops which did not dispersed in on the water surface, because the water was to saturated with the oil. Pic.10

23582633450_4bfa130e21_o.jpg

At the end it was apparent that the PIG did not absorbed all the oil. in fact it left quite large residuum. After that I repeated the procedure with two more cloths. Both absorbed a little bit, although a sheen was still visible. Pic.11

23881387605_f35465bd30_o.jpg

Pic.12-a

23852261346_18bfcb4ea6_o.jpg

Pic.12-b

23513476879_c7cf5f1876_o.jpg

From the initial cloth I was not able to recover large enough amount of oil. In fact I recovered only 1 drop of pure product. Because of that I had to use the mineral oil to dilute the sample and prepare it for the spectrometer. Good idea is to re-suspend the oil mixture which will secure even distribution of the pils in the mixture. Pic.13

23881590155_71aa00d2b2_o.jpg

Pic.14

23881653925_ba6132d8a2_o.jpg

I decided to cut out parts of the mat which soaked larger amount of oil in order to collect larger concentration. Pic.15

23254971793_3a8ac76ef7_o.jpg

After that I soaked the cut outs in mineral oil. Pic.16

23799364631_c667132494_o.jpg

Very quickly the cut outs got saturated and transparent. Pic.17

23773516872_180a67e2d7_o.jpg

I waited for about 5 min until the mineral oil mixed with the 80W90 and squeezed them into the 1oz flask. Pic.18

23514070109_2ea5848160_o.jpg

I was able to fill up more than half of the flask. After that I re-suspended the oil with a transfer pipette for couple of times and added 1ml of the mixture into a cuvette. Pic.19

23856073686_a5c27ff158_o.jpg

After that I took triplicate spectra of the above mentioned mixture of 80W90 and mineral oil. Here is the spectra. First low concentration 1drop of 80W90 & 1ml of mineral

than higher concentration of 80W90 & mineral oil:

The PIG absorbed the oil well but it is harder to recover the oil from it. Most of the product gets lost and I had to use the mineral oil to prepare large enough spec for the spectrometer.

Questions and next steps

Next steps would be to find out how to recover more oil more efficiently form the PIG and find out if how much if the spectra gets changed.

Why I'm interested

I am interested to test figure out a way how to prepare best specs for the OTK and to test the ability of different different DIY techniques to separate oil from water. This is one of the methods I am trying.


I did this Help out by offering feedback!


People who did this (0)

None yet. Be the first to post one!


3 Comments

Another solvent may do the trick of de-sorbing the oil. It should be highly volatile. Hexane or Acetone?

Is this a question? Click here to post it to the Questions page.

Reply to this comment...


We'd discussed using isopropyl alcohol at the Barnraising; I'd love to know if it can dissolve oil. Matt Pendergraft (@Matt_P) mentioned doing this, and said the alcohol could just be left out at room temperature for some hours to evaporate off and concentrate the sample. Worth trying!

Reply to this comment...


@ernestootero -- what about methanol, which is somewhat less toxic than hexane or acetone? Have you used isopropyl?

Is this a question? Click here to post it to the Questions page.

Reply to this comment...


Login to comment.

Public Lab is open for anyone and will always be free. By signing up you'll join a diverse group of community researchers and tap into a lot of grassroots expertise.

Sign up