Plate Nº 96 · recorded November 13, 2026
Chemistry & MaterialsReported finding
Self-Assembling Molecular Fabric Absorbs 97.9% of Benzene in Nylon Feedstock
A self-assembling woven molecular fabric absorbed 97.9% of benzene from cyclohexane mixtures and can be reused, potentially cutting energy-intensive distillation in chemical plants.
By Marcus Bennett4 min read752 words
In brief
- The molecular fabric absorbed 97.9% of benzene from a 50-50 benzene-cyclohexane mixture.
- The research was published in Nature in 2026 by teams from UT Austin and Zhejiang University.
- The fabric is self-assembling and reusable after heating to vaporize captured benzene.
- Benzene and cyclohexane have nearly identical boiling points, making distillation costly.
- The late Sir Fraser Stoddart, 2016 Nobel Prize co-recipient in Chemistry, was a co-author.
A reusable molecular fabric absorbed 97.9% of the benzene from a 50-50 benzene-cyclohexane mixture in lab tests, offering chemical makers a possible way out of one of the industry's most energy-hungry separation problems. The work, published in Nature, comes from chemists at the University of Texas at Austin and Zhejiang University.
The stakes are straightforward. Cyclohexane is a workhorse feedstock for nylon, paint, polyurethane foams found in furniture, and detergents. Producers typically make it from benzene, a known carcinogen, and the reaction leaves unwanted benzene mixed in with the product. Separating the two drives up cost and energy use at plants worldwide.
"Unbelievable amounts of energy go into chemical separation. It's one of the top energy sinks in the modern world," said Jonathan Sessler, a UT Austin chemist and one of the paper's corresponding authors.
Why can't distillation do the job?
Plants conventionally separate chemical mixtures by distillation: heat the mixture until one component vaporizes and leaves the other behind. The method depends on the components boiling at different temperatures.
Benzene and cyclohexane break that assumption. Their boiling points sit so close together that both chemicals vaporize at nearly the same time, forcing operators to run the process repeatedly and add special additives.
"This makes traditional distillation-based benzene-cyclohexane separations challenging and expensive," said Sessler, who holds the R.P. Doherty, Jr.-Welch Regents Chair in Chemistry.
The takeaway: the standard tool fails precisely where this mixture needs it most.
How does a molecular fabric filter chemicals?
The new material works like a thick, selective sponge. Four molecular networks weave over and under one another to form a layer with an interlocking pattern — the same interlacing principle as cloth, shrunk to the scale of individual molecules.
Each single layer comes in two mirror-image forms. In one, the networks cross in a clockwise spiral; in the other, they cross counterclockwise. Chemists call this property chirality, or "handedness." To build the filter, the researchers stack layers, alternating between the regular orientation and its mirror image.
The result is a springy fabric that separates benzene from cyclohexane in bulk, and it is stronger than a linearly woven material in which single threads form a layer.
Crucially for manufacturing, the fabric assembles itself. The molecular networks find and interlock with one another without external direction. "The whole thing converges by itself based on the underlying chemistry, which is especially cool because it allows the creation of these new materials in a facile way," Sessler said.
The takeaway: no elaborate fabrication steps stand between the chemistry and a working filter.
Is the filter practical to reuse?
Yes, according to the tests. After the fabric absorbs benzene from a mixture, scientists can heat it, vaporize the captured benzene off, and run the fabric again. Reusability matters because a disposable filter would swap one cost problem for another.
In the headline experiment, Sessler and the Zhejiang University team — led by Professors Feihe Huang and Guangfeng Li — poured a mixture of 50% benzene and 50% cyclohexane onto the fabric. It absorbed 97.9% of the benzene. For applications demanding higher purity, the mixture could pass through multiple times. The team also showed that the fabric can separate several other compounds of commercial interest.
The takeaway: one piece of fabric can work repeatedly and across more than one separation task.
What changes for industry?
Researchers at Zhejiang University have already demonstrated the fabric at a larger, industrial scale, moving the work beyond the benchtop. The team has not yet run an economic analysis, so the cost picture remains open — a caveat practitioners should weigh before drawing conclusions.
Still, the researchers argue the material could sharply cut the energy the chemical industry spends on molecular separation, with knock-on effects for manufacturers of paint, nylon, polyurethane, and other cyclohexane-containing products.
"In a sense, we are addressing the challenge of improving efficiency using one of humanity's oldest technologies: weaving. It's remarkable that the same principle of interlacing works at the molecular level," Sessler said.
Among the study's co-authors is the late Sir Fraser Stoddart, co-recipient of the 2016 Nobel Prize in Chemistry, who died before the study was completed.
The findings appear as Mengbin Wang et al., "A two-dimensional reticular triaxial molecularly woven fabric," Nature (2026), DOI: 10.1038/s41586-026-11218-8.
A woven cloth that filters molecules is now a demonstrated fact; whether it pays for itself at plant scale is the next question.
via phys.org/rss-feed/ (Source)
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News editor covering regulation, policy and their impact on general science news at SciBeat.
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