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Scientists Discover Way to Send Information into Black Holes Without Using Energy

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Scientists Create a Super Glue That Sticks Like Steel but Washes Away with Alcohol

Imagine a glue that is so strong it can hold together slippery, nonstick Teflon surfaces and even lift an 8-kilogram weight, yet disappears completely with just a splash of alcohol. It may sound like science fiction, but researchers at the University of Tokyo have turned this idea into reality.

This revolutionary adhesive could change the future of manufacturing, electronics, automobiles, and recycling by solving one of the biggest problems in material science: creating a glue that is both incredibly strong and easy to remove.

The researchers have published their findings in the Journal of the American Chemical Society, where they describe a new adhesive that combines exceptional strength, flexibility, and complete removability.

Why Traditional Glues Have a Major Problem

For decades, scientists have struggled with a difficult challenge. Strong adhesives usually create permanent bonds, making them almost impossible to remove without damaging the surface or leaving behind sticky residue.

Weak adhesives are much easier to peel off, but they simply cannot handle heavy loads or demanding industrial applications.

This creates a major trade-off:

  • Strong glue = difficult to remove

  • Easy-to-remove glue = not very strong

Industries such as electronics, automotive manufacturing, aerospace, and consumer products have been searching for a solution because permanent adhesives make repairs and recycling much more difficult.

The new adhesive developed in Japan appears to solve this long-standing problem.

A New Kind of Glue

The new adhesive is called CyclicFP-fmoc.

Unlike conventional industrial glues, which are made from long polymer chains, this adhesive is built from small molecules.

Normally, small-molecule adhesives are much weaker because they cannot form the extensive networks found in polymer-based glues.

However, the Tokyo researchers discovered a clever way to overcome this limitation.

Instead of relying on long molecular chains, the tiny molecules create a large number of noncovalent interactions.

These are weak attractive forces between molecules.

Individually, each interaction is small.

But when thousands of them work together, they create an adhesive that is both extremely strong and surprisingly flexible.

This combination is something researchers have been trying to achieve for many years.

The Secret Ingredient: Fluorine

One of the biggest innovations behind this adhesive is the use of fluorine atoms.

The scientists synthesized the adhesive using common laboratory chemicals but added fluorine to improve performance.

Fluorine helps the molecules organize themselves and stick together more effectively.

Combined with other molecular attractions, the fluorine allows the adhesive to grip surfaces that are usually considered impossible to bond.

One of those surfaces is Teflon (PTFE).

Sticking to One of the World's Slipperiest Materials

Teflon is famous for its nonstick properties.

It is commonly used in frying pans, laboratory equipment, industrial machines, and many other products specifically because almost nothing sticks to it.

This makes Teflon one of the hardest materials to bond using ordinary adhesives.

Yet the new CyclicFP-fmoc adhesive successfully bonded two Teflon plates together.

This achievement alone is considered remarkable in materials science.

Surprisingly Strong Performance

To test just how powerful the adhesive really is, researchers used a mechanical tensile testing machine.

The bonded Teflon plates resisted a tensile stress of 1.3 megapascals, demonstrating impressive bonding strength.

The scientists also performed a simple but dramatic demonstration.

Using only a thin layer of the adhesive between two Teflon plates, they suspended an 8-kilogram (18-pound) weight without the bond failing.

This proves that despite being removable, the adhesive performs like a high-strength industrial glue.

The researchers described their invention as a small-molecule adhesive with unprecedented ductility, meaning it remains flexible while maintaining exceptional strength.

The Best Part: It Washes Away with Alcohol

Perhaps the most exciting feature of this new glue is how easily it can be removed.

Instead of requiring heat, scraping, or harsh chemicals, the adhesive simply dissolves when exposed to ethanol (alcohol).

After washing, no sticky residue remains on the surface.

This makes cleanup quick, simple, and environmentally friendly.

For industries that assemble products using adhesives, this could significantly reduce repair time and manufacturing costs.

It Can Be Reused Again and Again

Another remarkable feature is that the adhesive is recyclable.

After dissolving it with ethanol, researchers recovered the material and reused it multiple times.

Tests showed that the adhesive maintained its performance even after being reused more than 10 times.

Reusable adhesives are extremely rare because most commercial glues permanently lose their bonding ability once removed.

This characteristic makes the new adhesive especially attractive for sustainable manufacturing.

A Big Step Toward Better Recycling

Modern electronic devices contain dozens of components permanently glued together.

While this makes products durable, it also makes recycling much harder.

Removing batteries, displays, sensors, and circuit boards often requires breaking components or using strong chemicals.

A removable high-strength adhesive could completely change this process.

Manufacturers could build products that are easy to disassemble at the end of their life.

Instead of throwing away valuable materials, companies could recover and recycle them efficiently.

The same idea applies to vehicles, appliances, industrial equipment, and countless consumer products.

Supporting a Sustainable Future

The researchers believe their invention could play an important role in creating a more sustainable society.

Strong adhesives have always been useful during manufacturing, but they become a problem when products need repairs or recycling.

An adhesive that bonds securely during use but can later be removed cleanly offers the best of both worlds.

According to the researchers, achieving "tough adhesion with easy debonding" has been a long-awaited goal in materials science.

Their work brings that vision much closer to reality.

What Happens Next?

Although the adhesive is still in the research stage, the results are highly promising.

Before reaching commercial markets, scientists will need to test how the glue performs under different temperatures, humidity levels, chemicals, and long-term use.

If future testing is successful, this technology could eventually be used in:

  • Electronics manufacturing

  • Automotive assembly

  • Medical devices

  • Aerospace engineering

  • Consumer products

  • Industrial equipment

  • Sustainable recycling systems

Its ability to combine high strength, flexibility, clean removal, and reusability makes it unlike most adhesives available today.

Final Thoughts

The University of Tokyo's new adhesive represents an exciting breakthrough in materials science. By using tiny molecules instead of traditional polymers, researchers have created a glue that can firmly bond even nonstick Teflon surfaces while remaining flexible and incredibly easy to remove with ordinary ethanol.

If this technology reaches commercial production, it could transform how products are assembled, repaired, and recycled. In a world where reducing waste and improving sustainability are becoming increasingly important, this innovative adhesive may become one of the most practical scientific breakthroughs in modern manufacturing.

Reference: Kohei Kikkawa, Abir Goswami, Kiyoshi Morishita, Hao Wang, Takashi Nakamura, Takuzo Aida, "Small-Molecule Adhesives with Strong and Ductile Adhesion to PTFE, Yet Allowing Easy Wipe-Off Removal", J. Am. Chem. Soc. 2026, 148, 27, 29138–29145. https://doi.org/10.1021/jacs.6c07886

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