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nanotechweb.org - Graphene oxide suitable to make smart textiles

DCN Corp® - Graphene oxide suitable to make smart textiles.  Credit - Ireland, Dublin City University - and Australia, University of Sydney and University of WollongongA new type of yarn has been developed by researchers in Australia and Ireland by using Graphene oxide that could be ideal in "smart" wearable textiles.  Characteristically the yarn has been shown to be strong and highly conductive with the highest capacitance reported to date - especially for a Graphene-based structure.

Smart textiles typically require electronic yarns and fibers that are strong, flexible and light.  Such fibers play the part of electrodes in the textiles, which will also need to store energy if they are to act as integrated capacitors and/or batteries.  Although researchers have made progress in the field of smart textiles by essentially developing yarns from Carbon nanotubes (CNT) and/or Graphene, such fibers are still far from ideal.  For example, the best capacitance metrics reported to date of 265 F/g is still far beyond the theoretical value of 550 F/g for Graphene-based structures.

Recently Gordon Wallace of the University of Wollongong, Australia, and colleagues have managed to make yarns and fibers from Graphene oxide and reduced Graphene oxide, which are not only highly flexible and lightweight, but have unrivaled electrochemical capacitance of 410 F/g.  As stated by a team member, Seyed - "Our structure is a first for Graphene oxide," - and Hamed Aboutalebi told nanotechweb.org - "because, until now, 3D architectures of Graphene-based capacitors were mainly limited to Graphene 'papers' and micro-super-capacitors, which although interesting in their own right, are not really practical for when it comes to making intelligent fabric."

The Australia-Ireland researchers employed a novel wet-spinning technique to produce unlimited lengths of highly porous yet dense, mechanically robust and flexible Graphene yarns from liquid crystals of very large Graphene oxide sheets.  The yarns, could be interestingly employed as the building blocks for super-capacitors in fully functioning smart textiles with a Young's modulus greater than 29 GPa.  Also, they have a high electrical conductivity of around 2500 S/m and a substantive surface area of about 2600 m2/g for Graphene oxide and 2210 m2/g for the reduced material.  As stated by Aboutalebi - the high capacitance of 410 F/g per Graphene oxide electrode arises due to the fact that ions can travel fairly fast and without resistance in the fibers.  Aboutalebi continues to state - "The yarns might be ideal in powerful next-generation multi-functional renewable wearable energy storage systems," - and - "our method to make these yarns is simple and can be scaled-up to produce mass quantities of the structures."

Going forward, the Dublin City University and the University of Sydney research team state that it is now busy working on making easily processed self-assembled, self-oriented and molecularly ordered Graphene-based hybrids for use in future intelligent fabrics.  Please Note the Australia-Ireland research team published their findings in American Chemical Society Nano. [1]  Original article available here and Similar article available here

The above research clearly highlights the innovation gained from Graphene oxide not just as next generation yarns but as capacitors.  Again, providing proof that Graphene can perform as standard binary digital logic.  Therefore, if you and/or your colleagues are interested in making the above research findings reality - please ensure to contact the company as soon as practicably possible.

[1] Aboutalebi, S.H., Jalili, R., Esrafilzadeh, D., Salari, M., Gholamvand, Z., Yamini, S.A., Konstantinov, K., Shepherd, R.L., Chen, J., Moulton, S.E., Innis, P.C., Minett, A.I., Razal, J.M. and Wallace, G.G. High-Performance multi-functional Graphene yarns: Toward wearable all-Carbon energy storage textiles American Chemical Society Nano (2014) Journal citation available here