The new adhesive can be produced from a range of vegetable oils, and may find applications for duct tape, packaging tape, stick-on notes, labels, even postage stamps – almost any type of product requiring a pressure-sensitive adhesive.
There are thousands of pressure-sensitive tape products, and analysts say it’s a $26 billion global industry.
The discovery was made essentially by accident while OSU scientists were looking for something that could be used in a wood-based composite product – an application that would require the adhesive to be solid at room temperature and melt at elevated temperatures.
For that, the new product was a failure.
“We were working toward a hot-melt composite adhesive that was based on inexpensive and environmentally friendly vegetable oils,” said Kaichang Li, a professor of wood science and engineering in the OSU College of Forestry. “But what we were coming up with was no good for that purpose, it wouldn’t work.”
“Then I noticed that at one stage of our process this compound was a very sticky resin,” Li said. “I told my postdoctoral research associate, Anlong Li, to stop right there. We put some on a piece of paper, pressed it together and it stuck very well, a strong adhesive.”
Shifting gears, the two researchers then worked to develop a pressure-sensitive adhesive, the type used on many forms of tape, labels, and notepads.
“It’s really pretty amazing,” Li said. “This adhesive is incredibly simple to make, doesn’t use any organic solvents or toxic chemicals, and is based on vegetable oils that would be completely renewable, not petrochemicals. It should be about half the cost of existing technologies and appears to work just as well.”
There have been previous attempts to make pressure-sensitive adhesives from vegetable oils, Li said, but they used the same type of polymerization chemistry as the acrylate-based petrochemicals now used to make tape. They didn’t cost much less or perform as well, he said.
The new approach used at OSU is based on a different type of polymerization process and produces pressure-sensitive adhesives that could be adapted for a wide range of uses, perform well, cost much less, and would be made from renewable crops such as soy beans, corn or canola oil, instead of petroleum-based polymers.
The technology should be fairly easy to scale-up and commercialize, Li said.
“OSU has applied for a patent on this technology, and we’re looking right now for the appropriate development and commercialization partner,” said Denis Sather, licensing associate with the OSU Office of Technology Transfer. “We believe this innovation has the potential to replace current pressure-sensitive adhesives with a more environmentally friendly formulation at a competitive price."
Li, an expert in wood chemistry, composites and adhesives, has already changed the face of the wood composites industry. His research created a formaldehyde-free adhesive that can be used in the production of plywood and particle board that is non-toxic, and is now becoming more widely used in that industry. That invention was inspired when he watched mussels clinging tenaciously to rocks despite being pounded by ocean waves, and he later duplicated in a laboratory the type of compound they use as an adhesive to accomplish that.
For these advances, in 2007 Li received the Presidential Green Chemistry Challenge Award from the Environmental Protection Agency. It recognized his continued work to reduce toxic chemicals used in manufacturing processes.
About the OSU College of Forestry: For a century, the College of Forestry has been a world class center of teaching, learning and research. It offers graduate and undergraduate degree programs in sustaining ecosystems, managing forests and manufacturing wood products; conducts basic and applied research on the nature and use of forests; and operates 14,000 acres of college forests.
Kaichang Li | EurekAlert!
New biomaterial could replace plastic laminates, greatly reduce pollution
21.09.2017 | Penn State
Stopping problem ice -- by cracking it
21.09.2017 | Norwegian University of Science and Technology
At the productronica trade fair in Munich this November, the Fraunhofer Institute for Laser Technology ILT will be presenting Laser-Based Tape-Automated Bonding, LaserTAB for short. The experts from Aachen will be demonstrating how new battery cells and power electronics can be micro-welded more efficiently and precisely than ever before thanks to new optics and robot support.
Fraunhofer ILT from Aachen relies on a clever combination of robotics and a laser scanner with new optics as well as process monitoring, which it has developed...
Plants and algae use the enzyme Rubisco to fix carbon dioxide, removing it from the atmosphere and converting it into biomass. Algae have figured out a way to increase the efficiency of carbon fixation. They gather most of their Rubisco into a ball-shaped microcompartment called the pyrenoid, which they flood with a high local concentration of carbon dioxide. A team of scientists at Princeton University, the Carnegie Institution for Science, Stanford University and the Max Plank Institute of Biochemistry have unravelled the mysteries of how the pyrenoid is assembled. These insights can help to engineer crops that remove more carbon dioxide from the atmosphere while producing more food.
A warming planet
Our brains house extremely complex neuronal circuits, whose detailed structures are still largely unknown. This is especially true for the so-called cerebral cortex of mammals, where among other things vision, thoughts or spatial orientation are being computed. Here the rules by which nerve cells are connected to each other are only partly understood. A team of scientists around Moritz Helmstaedter at the Frankfiurt Max Planck Institute for Brain Research and Helene Schmidt (Humboldt University in Berlin) have now discovered a surprisingly precise nerve cell connectivity pattern in the part of the cerebral cortex that is responsible for orienting the individual animal or human in space.
The researchers report online in Nature (Schmidt et al., 2017. Axonal synapse sorting in medial entorhinal cortex, DOI: 10.1038/nature24005) that synapses in...
Whispering gallery mode (WGM) resonators are used to make tiny micro-lasers, sensors, switches, routers and other devices. These tiny structures rely on a...
Using ultrafast flashes of laser and x-ray radiation, scientists at the Max Planck Institute of Quantum Optics (Garching, Germany) took snapshots of the briefest electron motion inside a solid material to date. The electron motion lasted only 750 billionths of the billionth of a second before it fainted, setting a new record of human capability to capture ultrafast processes inside solids!
When x-rays shine onto solid materials or large molecules, an electron is pushed away from its original place near the nucleus of the atom, leaving a hole...
19.09.2017 | Event News
12.09.2017 | Event News
06.09.2017 | Event News
25.09.2017 | Power and Electrical Engineering
25.09.2017 | Health and Medicine
25.09.2017 | Physics and Astronomy