Electrochemical Behavior of an Interpenetrating Polymer
Network Hydrogel Composed of Poly(propylene glycol)
and Poly(acrylic acid)
Seon Jeong Kim,1 Ki Jung Lee,1 Sun I. Kim,1, Young Moo Lee,2 Tack Dong Chung,3
Sang Hoon Lee4
1Department of Biomedical Engineering, Hanyang University, Seoul, Korea
2School of Chemical Engineering, Hanyang University, Seoul, Korea
3Department of Chemistry, Sungshin Women’s University, Seoul, Korea
4Department of Biomedical Engineering, Dankook University, Cheonau, Korea
Received 6 August 2002; accepted 12 November 2002
ABSTRACT: An interpenetrating polymer network (IPN)
hydrogel based on poly(propylene glycol) and poly(acrylic
acid) was prepared by UV irradiation. The swelling behavior
of the IPN hydrogel was studied by the immersion of the gel
in aqueous NaCl solutions of various concentrations. The
swelling ratio decreased with an increase in the NaCl concentration.
The electrically sensitive behavior of the IPN
hydrogel in electric .elds was also investigated. The IPN
hydrogel also showed a stepwise bending behavior that
depended on the electric stimulus. The bending angle and
bending speed of the IPN hydrogel were greatest in 0.6 wt %
aqueous NaCl and increased with an increase in the applied
voltage. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89:
2301–2305, 2003
Full Article: http://nbt.hanyang.ac.kr/images/paper/p35.pdf (http://nbt.hanyang.ac.kr/images/paper/p35.pdf)
Google cashe: http://www.google.com/search?q=cache%3AsjBNRYkTSjsJ%3Anbt.hanyang.ac.kr/images/paper/p35.pdf+hydrogel+polymer+inhibitor&hl=en&ie=UTF-8 (http://www.google.com/search?q=cache%3AsjBNRYkTSjsJ%3Anbt.hanyang.ac.kr/images/paper/p35.pdf+hydrogel+polymer+inhibitor&hl=en&ie=UTF-8)
It's very easy reading, so don't bee intimidated. Read it all, it's fucken solid.
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I would bee so excited if someone would like to test this on either some locked up methamphetamine or overbased pseudo that has been trapped due to Orange beeing activated..
Hopefully the freebase will rise to the surface in the case of the psuedo freebase.
Use carbon electrodes (Grey-led pencils duh) and a battery to pass a current through the aqueous solution of locked up sudo.
The water should already contain enough ions to play with due to the (bungled) basification. Only add more NaCl after attempting the solution without adding any.
Another suggestion is to use a stop/start technique in your ground-breaking science, by this I mean simply stopping and starting the flow of electric current by switching it on and off.
If you notice fb surfacing don't stop, continue as you have been, because the hydrogels could still contain more of your sudo.
The reason I suggest starting and stopping is beecause the gist of it is that the Na ions displace the sudo within the hydrogel entrapments by weight of numbers. So imagine the pumping action on the gels, contract/dilate.
This is the “something” I found for ware. I did PM him regarding it but he hasn't replied, so I think it's best to leave him in peace with an empty mailbox...
Allow this retard to take a crack addict....ooops....errr...I mean "CRACK AT IT".
You're not a plumber by any chance are ya Os?
Hold on! Before I step up to the plate and dazzle you with the facts, I think it's time that we try to discover that which seems to place us at odds on some subjects!
My gut feelings tell me that your formal education stands in the way by focusing on fixed ideas.
This subject of hydrogels is just one example that helps me draw that conclusion!
Perhaps the only thing permanent about our world is change!
In the world of science, more explicitly, The Central Science.....Chemistry is a changing science.
Therefore, the questions that chemists seek to answer are constantly changing also. Because of this, we might define chemistry as what chemists do. In many regards this definition is unsatisfactory. Nevertheless, it does suggest that chemistry itself changes as chemists absorb new information from other fields, tackle new problems, or re-examine old ones in new ways. If the new chemist adopts a term already occupied by definition because of similarities, it's important to stay current and up to date on the newest findings and the jargon used to describe this new activity!
Don't fault us for reading between, behind, or even snorting ;) the lines in areas that are of grave concern to us!
Because vested interests have a powerful stake in public policy, the public often is presented with conflicting information and claims!
Soas to not appear retarded here, I won't lecture further, so don't close your mind just yet!
You've all witnessed that Ibee is always ready willing and more than able to bury bees in documentation regarding areas of research he feels he's completed and understands.
The Pill Formulation research is one area that many lack the capacity of prinicipal understanding to the point of actively pioneering workarounds. Why??? Because reading patents is boring as hell and they'd rather let someone else do it! It's an intimidating task I agree! It takes months just to disect a patented formulation and then months more to compare lab experiments and validate results based on the best understanding!
I do give you credit for giving me credit by agreeing with me on drymatrix formulation being a type of hydrogel, if only by association.
The "Hydrogel" terminology was encountered during many of the numerous patent reads regarding "sympathomimetic denaturants"!
And in due time, I'll list all the industry trademark names for the most prefered embodiments that incorporate their use as a means of "Controlled" drug delivery systems!
Mostly the term Hydrogel can be found in topical, dermal or transdermal delivery in wound healing applications, but as you will see, the definition covers a much broader scope in chemistry and Pharm medicine.!
What is a hydrogel?
A hydrogel is a polymeric material that has the ability to swell in water without dissolving, and to retain water within its structure.
Hydrogels can generally be described as two-component systems:
•first, water
•second, a three-dimensional polymer network
Okay! Now this describes the drymatrix formulation to a tee!
There are many more complex polymers which we'll flip on deck as a follow up when time allows just so you don't think I'm blowing smoke at yer CRACK about hydrogels not being used in the newer embodiments!
The Hybrid variety are the ones of interest to bees!
One more QUICK tidbit:
Hydrogels for Controlled Drug Release
City College: C. Steiner
Prof. Steiner has patented a new class of materials, called two-phase hydrogels, with interfacial and transport properties that can be exploited to great advantage in emerging technologies such as controlled drug release. The materials are characterized by hydrophobic microdomains dispersed throughout a water-swollen polymer network. The microdomains can serve as reservoirs for drug compounds permeating these gels. Drug is released from the gel to the surroundings by diffusion. However, the driving force for diffusion, namely, the concentration of the solute in the bulk gel, can be kept nearly constant for prolonged times if the gels are engineered such that the interfacial flux of drug from the microdomains to the bulk balances the diffusive flux out of the gel.
This unique system overcomes many of the disadvantages of currently available drug release platforms. Our research program addresses all aspects of the rational design, fabrication, testing, and modeling of these new materials.
Peace of the reaction
(https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000459939-file_ztvh.gif)
Have FUN-Bee SAFE