Researchers use unique ingredient to strengthen bamboo
Once used to preserve bodies, plastination now strengthens biocomposites


Date:
March 18, 2022
Source:
University of British Columbia Okanagan campus
Summary:
Researchers have adapted a technique -- originally designed
to embalm human remains -- to strengthen the properties of
biocomposites and make them stronger. With the innovation
of new materials and green composites, it is easy to overlook
materials like bamboo and other natural fibers, explains one of the
researchers. These fibers are now used in many applications such
as clothing, the automotive industry, packaging and construction.



FULL STORY ==========================================================================
UBC Okanagan researchers have adapted a technique -- originally designed
to embalm human remains -- to strengthen the properties of biocomposites
and make them stronger.


==========================================================================
With the innovation of new materials and green composites, it is easy to overlook materials like bamboo and other natural fibres, explains UBCO Professor of Mechanical Engineering Dr. Abbas Milani. These fibres are
now used in many applications such as clothing, the automotive industry, packaging and construction.

His research team has now found a way not only to strengthen these fibres,
but reduce their tendency to degrade over time, making them even more environmentally friendly.

"Bamboo has nearly the same strength as a mild steel while exhibiting more flexibility," says Dr. Milani, the founding director of the Materials
and Manufacturing Research Institute. "With its low weight, cost and
abundant availability, bamboo is a material that has great promise but
until now had one big drawback." Bamboo is one of the world's most
harvested and used natural fibres with more than 30-million tonnes
produced annually. However, its natural fibres can absorb water and
degrade and weaken over time due to moisture uptake and weathering.

Using a process called plastination to dehydrate the bamboo, the research
team then use it as a reinforcement with other fibres and materials. Then
they cure it into a new high-performance hybrid biocomposite.



========================================================================== First developed by Gunther von Hagens in 1977, plastination has been extensively used for the long-term preservation of animal, human
and fungal remains, and now has found its way to advanced materials applications.

Plastination ensures durability of the composite material for both short-
and long-term use, says Daanvir Dhir, the report's co-author and recent
UBC Okanagan graduate.

"The plastinated-bamboo composite was mixed with glass and polymer
fibres to create a material that is lighter and yet more durable than comparable composites," says Dhir. "This work is unique as there are
no earlier studies investigating the use of such plastinated natural
fibres in synthetic fibre reinforced polymer composites." Dhir says
this new durable hybrid bamboo/woven glass fibre/polypropylene composite, treated with the plastination technique has a promising future.

Supported by industrial partner NetZero Enterprises Inc., the research
shows that adding only a small amount of plastinated materials to the
bamboo can increase the impact absorption capacity of the composite --
without losing its elastic properties. This also lowers the material's degradation rate.

More work needs to be done on the optimization of this process as Dhir
says plastination is currently time-consuming. But he notes the benefit
of discovering the right composition of plastinated natural fibres will
result in a sizable reduction of non-degradable waste in many industries,
with a lower environmental footprint.

Future studies are underway to optimize and investigate the effect of plastinating other natural fibres, such as flax and hemp. The researchers
also suggest a life cycle analysis of the materials should be conducted
under different applications and compared to non-plastinated samples. This
will provide a better picture of the corresponding trade-off between
the environmental footprint and mechanical durability effects.

"Biocomposites continue to find new applications under the circular
economy paradigm," adds Dr. Milani. "The innovations in the methods used
to develop these composites will ensure benefits well into the future."

========================================================================== Story Source: Materials provided by University_of_British_Columbia_Okanagan_campus. Note: Content may be
edited for style and length.


========================================================================== Journal Reference:
1. Daanvir K. Dhir, Reeghan Osmond, Kevin Golovin, Abbas S. Milani. A
high-
performance hybrid green composite using plastinated bamboo fillers,
with reduced environmental degradation effect. Composite Structures,
2022; 282: 115123 DOI: 10.1016/j.compstruct.2021.115123 ==========================================================================

Link to news story: https://www.sciencedaily.com/releases/2022/03/220318161449.htm

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