Thank you for the comment, nice to hear that! At the moment, I'm actually working with Soarce to bring something similar to the market in the future: www.soarceusa.com/ In brief, there are some technical challenges to solve, the most suitable applications need to be figured out, and scaling needs to be done. But it’s progressing bit by bit. A bit similar technology that is moving to pilot scale now and has already been used in commercial demo products is by Spinnova: spinnova.com/
Good to hear you enjoyed! We measured the strength with an Instron-type device. Also a textile fibre testing device like Favigraph or Vibrodyn would work, but some of our samples were too thick for that, so we chose to use Instron for all
@@merilundahl5941 Thanks for early reply. I want also to know whether their are some parameters to be considered before measuring using Instron -type device or do we measure as we use to measure the strength of natural fibers for instance sisal fibers, cotton fibers etc.???
@@merilundahl5941 Thanks a lot for the feedback. I am actually working on wet spinning of chitin nanofibers but am getting very weak filaments which are very difficult to be picked out of coagulation bath and those which are successfully picked from the coagulation bath they are very weak (by stretching (pulling) using hand) even after being dried. What could be the reason for this and what advice can you give me?? (am using 2% ChNF, 21G needle and acetone coagulation bath). I been to looking on your demonstration several time and observed you picked a long filament from 100% nanocellulose out of coagulation bath but am trying to do the same for the ChNF without success. I will be grateful for your help
@@merilundahl5941 Thanks a lot for the feedback. I am actually working on wet spinning of chitin nanofibers but am getting very weak filaments which are very difficult to be picked out of coagulation bath and those which are successfully picked from the coagulation bath they are very weak (by stretching (pulling) using hand) even after being dried. What could be the reason for this and what advice can you give me?? (am using 2% ChNF, 21G needle and acetone coagulation bath). I been to looking on your demonstration several time and observed you picked a long filament from 100% nanocellulose out of coagulation bath but am trying to do the same for the ChNF without success. I will be grateful for your help
We have normal electrospinning unit in our lab. How I can use it for spinning of nanocellulose. Does wet spinning need the same instrument or another setup?
You have a syringe pump in your electrospinning system, right? Just don't connect the syringe to the voltage and instead immerse the needle tip in a coagulating liquid bath. You can make it easier by adding a tubing between the syringe and the needle, so you can move the needle more freely. It's possible to electrospin nanocellulose, too, but then you need to an additive. Some examples are mentioned here: www.fpl.fs.fed.us/documnts/pdf2016/fpl_2016_clemons001P.pdf
Hi Meri, Thanks for sharing good work, I am working for Aditya Birla Group, India, We are the largest manufacturer of Viscose staple fibre and also do have viscose filament yarn production plant. We tried incorporating nano cellulose in viscose dope before to improve fibre tenacity but we couldnt get encouraging results. Do you have any idea How basic fibre strength can be improved by adding additive in dope?
That's a very good question! Unfortunately I don't have experience on that, but e.g. from this paper, you could get an idea about how nanocellulose has been used for reinforcing fibres: www.techscience.com/jrm/v4n5/28759
On this video, it was cellulose acetate. I have also used guar gum and locust bean gum. There would probably be many other alternatives, too. Anything that you can easily spin from a solution
It's removed by soaking in acetone, which only dissolves the cellulose acetate coating but not the cellulosic fibre inside. The cellulose acetate can be used again. It's used as a solution in acetone anyway, so the solution only has to be adjusted to the right concentration and it's ready for reuse
Hi, this video is awesome... checked the papers as well. So, Why is it not in the market yet? regards and congrats for the good video
Thank you for the comment, nice to hear that! At the moment, I'm actually working with Soarce to bring something similar to the market in the future: www.soarceusa.com/
In brief, there are some technical challenges to solve, the most suitable applications need to be figured out, and scaling needs to be done. But it’s progressing bit by bit. A bit similar technology that is moving to pilot scale now and has already been used in commercial demo products is by Spinnova: spinnova.com/
Hi, Good day. Thanks for sharing the video. You make me having some idea for my research. Hope we can share our knowledge in future. Thank you.
Much informative. I wish if you could add all the related data to Textiles.
Thanks for very nice and informative video. I want to ask how do you measure the strength of the filaments
Good to hear you enjoyed! We measured the strength with an Instron-type device. Also a textile fibre testing device like Favigraph or Vibrodyn would work, but some of our samples were too thick for that, so we chose to use Instron for all
@@merilundahl5941 Thanks for early reply.
I want also to know whether their are some parameters to be considered before measuring using Instron -type device or do we measure as we use to measure the strength of natural fibers for instance sisal fibers, cotton fibers etc.???
@@cosmasfednand7673 you can measure like you would measure natural fibres, yes
@@merilundahl5941 Thanks a lot for the feedback.
I am actually working on wet spinning of chitin nanofibers but am getting very weak filaments which are very difficult to be picked out of coagulation bath and those which are successfully picked from the coagulation bath they are very weak (by stretching (pulling) using hand) even after being dried. What could be the reason for this and what advice can you give me?? (am using 2% ChNF, 21G needle and acetone coagulation bath).
I been to looking on your demonstration several time and observed you picked a long filament from 100% nanocellulose out of coagulation bath but am trying to do the same for the ChNF without success. I will be grateful for your help
@@merilundahl5941 Thanks a lot for the feedback.
I am actually working on wet spinning of chitin nanofibers but am getting very weak filaments which are very difficult to be picked out of coagulation bath and those which are successfully picked from the coagulation bath they are very weak (by stretching (pulling) using hand) even after being dried. What could be the reason for this and what advice can you give me?? (am using 2% ChNF, 21G needle and acetone coagulation bath).
I been to looking on your demonstration several time and observed you picked a long filament from 100% nanocellulose out of coagulation bath but am trying to do the same for the ChNF without success. I will be grateful for your help
Please tell me solvent which is used to formation of nana fibers
We have normal electrospinning unit in our lab. How I can use it for spinning of nanocellulose. Does wet spinning need the same instrument or another setup?
You have a syringe pump in your electrospinning system, right? Just don't connect the syringe to the voltage and instead immerse the needle tip in a coagulating liquid bath. You can make it easier by adding a tubing between the syringe and the needle, so you can move the needle more freely.
It's possible to electrospin nanocellulose, too, but then you need to an additive. Some examples are mentioned here: www.fpl.fs.fed.us/documnts/pdf2016/fpl_2016_clemons001P.pdf
@@merilundahl5941 Thank you very much for your valuable suggestion.
@@merilundahl5941 I think it is possible to electro spin it, but you may need a special collector
Hi Meri, Thanks for sharing good work, I am working for Aditya Birla Group, India, We are the largest manufacturer of Viscose staple fibre and also do have viscose filament yarn production plant. We tried incorporating nano cellulose in viscose dope before to improve fibre tenacity but we couldnt get encouraging results. Do you have any idea How basic fibre strength can be improved by adding additive in dope?
That's a very good question! Unfortunately I don't have experience on that, but e.g. from this paper, you could get an idea about how nanocellulose has been used for reinforcing fibres: www.techscience.com/jrm/v4n5/28759
@@merilundahl5941 Thanks for your kind reply and sharing link.
Hi Meri, may I know what kind of supporting polymer you using? It will be very helpful for me. Thanks.
On this video, it was cellulose acetate. I have also used guar gum and locust bean gum. There would probably be many other alternatives, too. Anything that you can easily spin from a solution
@@merilundahl5941 Thank you very much for update.
I wanna ask some question about this video, How could I contact you?
Our email addresses are firstname.lastname@aalto.fi. Looking forward to your message!
Thank you for your comment. Meri.Lundahl@aalto.fi is the e-mail address , isn't it?
@@merilundahl5941 It looks like an email to that address did not go through due to "not having permission to send it"
@@ShotgunLlama It's because I changed jobs. You can now reach me at firstname.lastname@ethica.fi
nice
How is the polymer coating removed after spinning, and can the same polymer be reused?
It's removed by soaking in acetone, which only dissolves the cellulose acetate coating but not the cellulosic fibre inside. The cellulose acetate can be used again. It's used as a solution in acetone anyway, so the solution only has to be adjusted to the right concentration and it's ready for reuse