Ruth Naomi Mariae Rosales

6 Questions 1 Answers 0 Followers

Questions related from Ruth Naomi Mariae Rosales

How can I avoid hydrogel dehydration?

Hi. I was able to synthesize hydrogel by crosslinking polyvinyl alcohol with borax and by reinforcing with a filler (silica from rice husks and cellulose). One week after my synthesis, however,...

26 April 2015 8,679 3 View

What other factors can affect failure of hydrogels to form?

Good day. I have been trying to synthesize PVA hydrogels through cyclic freeze thawing but unfortunately, only a viscous liquid is formed even after several cycles. To provide more details, I am...

07 April 2015 7,632 4 View

Is a USP grade polyvinyl alcohol (86-89% hydrolysis) enough to synthesize a hydrogel through freeze-thaw method?

Good day! For my undergraduate thesis, I am synthesizing PVA hydrogels with reinforcements. In my previous syntheses, I have been using only technical grade of PVA and these have not been...

26 March 2015 7,901 1 View

Are you familiar with a freeze thaw method to make hydrogels?

I am currently employing the freeze thaw method to synthesize 10% w/v polvinyl alcohol. However, I cannot get the solution to gel. It becomes a sticky paste instead. I am only using a refrigerator...

21 March 2015 5,165 9 View

How can I dissolve polyvinyl alcohol powder properly?

I am currently sythesizing PVA hydrogels but I am having a hard time dissolving it. I am using a magnetic stirrer but most of the time, the solution becomes too thick that the magnetic stirrer...

21 March 2015 1,898 30 View

Can sebacic acid, lactic acid and acetic anhydride be used as a crosslinker?

I am currently doing a study on poly vinyl alcohol - silica (from rice husk) hydrogels. Unfortunately, I cannot use glutaraldehyde as a crosslinker since it has been banned. In connection to this,...

15 November 2014 4,295 3 View