#nanofibers

[materialsscienceandengineering]

Leaf-inspired design makes bioplastics degradable, stronger

Society has long struggled with petroleum-derived plastic pollution, and awareness of microplastics' detrimental effects on food and water supplies adds further pressure. In response, researchers have been developing biodegradable versions of traditional plastics, or "bioplastics." However, current bioplastics face challenges as well: Current versions are not as strong as petrochemical-based plastics and they only degrade through a high-temperature composting system. Enter researchers at Washington University in St. Louis, who have solved both problems with inspiration from the humble leaf. Long before plastic, humans wrapped their food in leaves, which easily biodegrade due to an underlying structure of cellulose-rich cell walls. WashU's chemical engineers decided to introduce cellulose nanofibers to the design of bioplastics.

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[irl-mothman]

I feel like if you are going into any research field with fibers or textiles or anything you should make it a priority to be well informed on fiber and textile arts.

Like I’ve mentioned before I’m in a medical research field where we rarely deal with nanofibers but I do interact with other researchers who do and so many of them would be helped out if they knew fiber/textile stuff.

(Also for reference the fiber researchers I personally know are all men who don’t have any “craft” background in fiber/textile art and one woman that does, she is largely excluded from this but this also goes out to women(although a weird amount of female researchers/medical people are into fiber arts, the moment there’s some free time in the lab the majority of the women are bringing out crochet hooks and knitting needles and cross stitch and all kinds of stuff it’s great but off topic))

But like one guy was bragging about how he’s inventing this brand new never before seen nano fiber spinning technique and no one has ever thought of this ever and he’s so smart and unique and like… it was in fact a drop spindle that had been modified to work with nanofibers. Like it’s cool that you modified it that’s amazing props to you but I feel like some time could have been shaved off if you knew what drop spindles were and could use that as a base instead of having to reinvent the wheel bc fiberarts aren’t taught in engineering/physics/miomechanics.

Similarly I was talking to a guy who was working on some textile nanofiber tech and he was complaining about how it’s hard to get enough of the fibers to touch skin without making the garment expensive bc those particular fibers are pricey to manufacture, and he was really amazed when I suggested a twill or satin weave to increase the amount of fibers on the backside of the fabric and therefore touching the wearer without adding in more fibers. Actually almost every textile nanofiber researcher I’ve interacted with is exclusively using a plain weave when some weaves might be more effective. Now k don’t know if the fibers will still work in that weave but they didn’t either bc they had never thought about it and now they have a new idea to test.

This is nothing against those people this isn’t common knowledge so if you don’t have a specific background you don’t know what you don’t know, I just think that like craftwork knowledge should be pushed more if you’re in a field related to it or it should be more normalized to like consult with crafts people more. Back to the nanofiber researcher who knows about sewing, she’s actually pretty well known for influential work the she herself admits was her manipulating the the strands of the nanofiber to simulate a bias cut but within each individual strand. Amazing stuff btw I cannot comprehend how she did that so cool. Yall should look at nanofibers it’s so cool.

[elschism]

Morgellons Fibers growing out of bud,is A.I.-SMART Weed here to stay?

Morgellons Fibers growing out of bud,is A.I.-SMART Weed here to stay?

2016 CHEMTRAILS IN VIRGINIA USA MORGELLONS LINK ! CLICKE HERE PLEASE ! Morgellons Fiber growing out of Weed bud (more…)

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[bpod-bpod]

Nervous Dancers

Transported to the site of a spinal injury, here artificial chemicals aim to heal damaged cells. But, like new arrivals at a school disco, the molecules fail to make an impact until they’re encouraged to move – jiving about on a scaffold of nanofibres, they match the rhythms of natural molecules that dance around receptors in the cells’ surface, triggering growth and repair. Fine-tuning these bioactive chemicals makes them more mobile and 'sociable' – in this stretch of mouse spine (highlighted in green and blue) their frolicking signals limit the growth of scar tissue and encourage new blood vessels to develop. Eventually, neuron cells grow new branches or axons (red). In the future, coaxing molecules to move to different biological rhythms may help to encourage repair, and, hopefully, keep human bodies moving.

Written by John Ankers

Image from the Stupp Laboratory, Northwestern University

Simpson Querrey Institute for BioNanotechnology, Northwestern University, Chicago, IL, USA

Image copyright held by the original authors

Research by Z. Álvarez and colleagues, Northwestern University, published in Science, November 2021

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[qingzinano]

How To Fabricate A Graphene Oxide (GO) Thin-film Nanofibrous Composite Membranes By Electrospinning Nanofibers Equipment?

 #graphene #oxide #GO #thinfilm #nanofibrous #composite #membranes #electrospinning #nanofibers #equipment #tunable #nanochannels #nanopores #highly #porous #support #nanosheets #mat #TFNC

 GO has attracted the interest of many researchers for fabricating novel separation membranes owing to their smoothness, atomic thickness, good hydrophilicity, and tunable nanochannels or nanopores. However, GO membranes really show poor stability in water, especially fabricated on highly porous nanofibrous support. Pan and his group first synthesized GO nanosheets with large lateral size (>200 mm) by a newly developed method and successfully assembled them on a highly porous nanofibrous mat using the vacuum suction method. As shown in Figure, the nanochannels, formed by the interlayer spacing between adjacent GO nanosheets, enabled an ultrafast water permeability, which is claimed to stem from a quickly passing hydrophilic “gate” (edges of GO nanosheets or defects in the GO) for aggregation and the fast slip flow along the atomically smooth and hydrophobic carbon walls. Moreover, the GO TFNC membranes showed high rejection performance (nearly 100% rejection of Congo red and 56.7% for Na2SO4).

[sciencesourceimages]

Cribellate Spider Silk: A Better Bug Trap?

Scanning electron micrograph of an insect in cribellate spider silk. 

Cribellate spiders are those that, unlike most other spiders, do not put glue on their threads, but are able to process the silk into complex tissues. This is done by linking up to 40,000 nanofibers. The thread is thus completely dry and yet sticky. This ability to process nanofibers is unique both in the animal kingdom and in technical development processes. 

View More SEMs Of Spider Webs

Within the framework of a project "Cribellate Spinnen" of the RWTH, the Johannes Kepler University Linz and the Johannes Gutenberg-University Mainz, a study on the biological function of the threads of cribellate spiders was published. They found that the individual nanofibers were no longer visible, but wrapped in a fluid as soon as an insect touched the net. 

An analysis of this fluid showed that there were the same chemicals as in the wax that insects use on their chitin armor to protect themselves from evaporation. Upon contact of an insect with the net, the waxy chemicals of the chitin armor are thus absorbed by the wool-like nanofibers. 

This turns the light silk thread into a solid structure. "The result of this adhesion is similar to the principle of a fiber-reinforced plastic. The prey reinforces its prison itself, “ Dr. Joel, director of the project. 

© Eye of Science / Science Source

[skyovereuropeldkde]

14-10-2017 Thank you for caring and sharing ✈️ ♒ ☠ Skygazer ☠ ♒ ✈️ 

Chemwebs

[materialsscienceandengineering]

A reusable, washable nanofiber membrane can filter water sustainably

The antimicrobial triclosan is widely used in personal hygiene products, textiles and plastics, but when it enters the environment via wastewater, it poses a significant threat to aquatic organisms. A Cornell research group has developed a cyclodextrin-based fibrous membrane that in lab testing removed approximately 90% of triclosan from water. Their washable and reusable nanofiber material, fabricated via electrospinning—a process that uses an electric field to draw ultra-thin fibers from a liquid—also effectively removed other micropollutants. "The electrospinning produces a very thin fiber, less than 1 micron in diameter (a human hair is approximately 75 microns), which gives us high surface area and excellent adsorption," said Mahmoud Aboelkheir, doctoral student in human centered design and lead author of the work.

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