Polymer Synthesis and Mechanic Tests | Making polyacrylamide/ Alginate hydrogel Composite

hydrogel synthesis methods, hydrogel synthesis, crosslinker, polyacrylamide hydrogel synthesis, alginate hydrogel synthesis. Alginate/polyacrylamide hybrid hydrogel has attracted intense interests in different fields, but the low tensile strength and stiffness limit its comprehensive application. In this hydrogel system, the alginate-cation network plays an important role. Thus, based on the unique structure of alginate and its special interaction with different metal cations, we designed a new method of introducing Calcium (Ca) ions to crosslink the alginate sufficiently, creating a stronger alginate network. As a result, the prepared hybrid hydrogel exhibits enhanced strength and stiffness, which may serve as a new way to develop stronger hydrogel. All these results showed that the resultant dual-cation (Ca+2) crosslinked hydrogel exhibits superior mechanical strength than that of single-cation (Na+) crosslinked hydrogel. This research may expand the scope of practical applications of this strong hybrid hydrogel in the load-bearing field.

[@user-el1xc1lm8w]

Hi. Thank you for your video. I found some papers synthesis double network with acrylamide. They made the reaction under N2 protection. Is it important if we make the reaction without these conditions?

[@jinlee9938]

Hi, thanks for making this video.
Can I ask you about why vinylsulfonic acid monmer are used and what if TEMED is not used?

[@polymerscope6881]

Vinylsulfonic acid is a hydrophilic monomer and increases the swelling capacity of the formed hydrogel. TEMED is a catalyst and enables the polymerization reaction to occur rapidly at low temperature.

[@zhsun5819]

Super nice video to explain the protocol! I wonder if the Ca2+ crosslink has any effect on the materials melting point? Have you tried heating the material up? Another question is if the material will degrade in soil / water over time. Cheers thanks!

[@polymerscope6881]

Thanks. Crosslinking obviously has an effect on thermal properties. Crosslinking and thermal stability are directly proportional. such materials are biocompatible and do not biodegrade for many years.

[@zhsun5819]

@@polymerscope6881 appreciate the quick reply！Super useful!

[@user-tw4in4gu6p]

Hi, thanks for making this video.
if you want to make a unified thick gel form as you've made from sodium alginate, is spraying calcium chloride enough or would it make it a gel only on the outer layer with this method?

[@polymerscope6881]

Thanks. CaCl2 alone is not enough. It is necessary to use chemical crosslinkers.

[@omsingharjit]

Is it possible to make diy light Curable chemical or cement just like use for pcb solder mask ?

[@polymerscope6881]

It is possible to use it as an additive, but the cost will be quite high.

[@drjibink4495]

what is the use of sulphonic acid? Heating at 60 degree is required in the initial step?

[@polymerscope6881]

what is the use of sulphonic acid? Heating at 60 degree is required in the initial step?

[@sohylaazizelshabrawy1081]

During the 24 hr , do you leave it in the air or what?
Is there another material similar to vinylsulfonic acid ?

[@polymerscope6881]

It would be better if it was closed to the air. any anionic monomer. For example acrylic acid, AMPS etc.

[@sasageyo8843]

would it be possible to prepare the hybrid hydrogel from the polacrylamide available in diapers? thank you

[@polymerscope6881]

Of course, they are made from sodium polyacrylate. There are detailed synthesis steps in the literature.

[@meysamkordi4944]

Hi, I want to make a sheet elastic gel with alginate, for example, a 1cm thick elastic gel

[@polymerscope6881]

Yes u can do like this. th-cam.com/video/_sz0KkT603E/w-d-xo.html

[@meysamkordi4944]

you can help me

[@mallikarjunb4070]

Sir will you brief the procedure stepwise

[@polymerscope6881]

There is a detailed explanation in the video. If you want to search 'acrylamide-based stretchable hydrogels', there are many studies in the literature.

[@gaoxize5348]

when to add calcium ions to the solution?

[@polymerscope6881]

we don't add. If you add it, the alginate will gel.

[@mekrishnan92]

Hello I need some help making hydrogels. Can i please contact you?

[@polymerscope6881]

Yes of course.

[@jamiep2247]

For a better instructional video, wear some safety glasses.