Current Polymer News and Events

Current Polymer News and Events, Polymer News Articles.
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Princeton team advances new route to chemically recyclable plastics
As the planet's burden of rubber and plastic trash rises unabated, scientists increasingly look to the promise of closed-loop recycling to reduce waste. A team of researchers at Princeton's Department of Chemistry announces the discovery of a new polybutadiene molecule - from a material known for over a century and used to make common products like tires and shoes - that could one day advance this goal through depolymerization. (2021-01-25)

SUTD research team extends 4D printing to nanophotonics
The newly developed shape memory polymer resist which allows for high-resolution 4D printing, promises a platform for information hiding for optical anti-counterfeiting and tunable photonic devices. (2021-01-22)

Cargo delivery by polymers
Degradable, bio-based polymers offer options for chemical recycling, and they can be a tool to store and release useful molecules. Scientists have developed a class of sugar-based polymers that are degradable through acid hydrolysis. The researchers also integrated ''cargo'' molecules in the polymer, which are designed to split off after polymer degradation. Degradable, cargo-bearing polymers are important for medical and sensor applications, says the study published in the journal Angewandte Chemie. (2021-01-22)

Taking sieving lessons from nature
Nanostructure-templated electrochemical polymerization enhances speed and selectivity in organic membrane-based processes. (2021-01-21)

Drug-delivery microcapsules tagged with zirconium-89 can be tracked by PET imaging
Polymer and radionuclide chemists report major advance in microcapsule drug delivery systems. Their microcapsules -- labeled with radioactive zirconium-89 -- are the first example of hollow polymer capsules capable of long-term, multiday positron emission tomography imaging in vivo. In previous work, the researchers showed that the hollow capsules could be filled with a potent dose of the cancer drug doxorubicin, which could then be released by therapeutic ultrasound that ruptures the microcapsules. (2021-01-20)

Russian chemists developed polymer cathodes for ultrafast batteries
Russian researchers have synthesized and tested new polymer-based cathode materials for lithium dual-ion batteries. The tests showed that the new cathodes withstand up to 25,000 operating cycles and charge in a matter of seconds, thus outperforming lithium-ion batteries. The cathodes can also be used to produce less expensive potassium dual-ion batteries. (2021-01-19)

New tool removes chemotherapy drugs from water systems
'What goes in, must come out' is a familiar refrain. It is especially pertinent to the challenges facing UBC researchers who are investigating methods to remove chemicals and pharmaceuticals from public water systems. Cleaning products, organic dyes and pharmaceuticals are finding their ways into water bodies with wide-ranging negative implications to health and the environment, explains Dr. Mohammad Arjmand, an assistant professor of mechanical engineering at UBC Okanagan. (2021-01-18)

New process more efficiently recycles excess CO2 into fuel, study finds
For years, researchers have worked to repurpose excess atmospheric carbon dioxide into new chemicals, fuels and other products traditionally made from hydrocarbons harvested from fossil fuels. The recent push to mitigate the climactic effects of greenhouse gases in the atmosphere has chemists on their toes to find the most efficient means possible. A new study introduces an electrochemical reaction, enhanced by polymers, to improve CO2-to-ethylene conversion efficiency over previous attempts. (2021-01-11)

Scientists make sustainable polymer from sugars in wood
Scientists from the University of Bath have made a sustainable polymer using the second most abundant sugar in nature, xylose. (2021-01-11)

Post-surgical patch releases non-opioid painkiller directly to the wound
A Duke-led team of scientists has developed a bio-compatible surgical patch that releases non-opioid painkillers directly to the site of a wound for days and then dissolves away. The polymer patch provides a controlled release of a drug that blocks the enzyme COX-2 (cyclooxygenase-2,) which drives pain and inflammation. The study appears Jan. 10, 2021 in the Journal of Controlled Release. (2021-01-11)

Analytical measurements can predict organic solar cell stability
researchers have developed an analytical measurement ''framework'' which could allow organic solar cell researchers and manufacturers to determine which materials will produce the most stable solar cells prior to manufacture. (2021-01-11)

Engineers find antioxidants improve nanoscale visualization of polymers
Reactive molecules, such as free radicals, can be produced in the body after exposure to certain environments or substances and go on to cause cell damage. Antioxidants can minimize this damage by interacting with the radicals before they affect cells. (2021-01-08)

Nanocrystals that eradicate bacteria biofilm
POSTECH-UNIST joint research team finds ways to control the surface texture of nanostructures. (2021-01-08)

Researchers repurpose 'damaged' polymer optical fibers to precisely measure magnetic fields
Optical fiber sensors can measure strain, temperature, pressure, and many other physical parameters along the fibers, but they are currently immune to electromagnetic noise -- interference from other external electric or magnetic interactions. It is a desirable trait, until the effect of the electromagnetic field on the fibers needs to be measured. An international research team has used what was previously considered a 'damaged' part of an optical fiber to develop such a magnetic field sensor. (2021-01-07)

Mechanophores: Making polymer crystallization processes crystal clear
Scientists at the Tokyo Institute of Technology (Tokyo Tech) have come up with a new technique to evaluate the mechanical forces generated in polymer crystallization as they cool down from their molten state. In a new study published in Nature Communications, they used small, fluorescent molecules to visualize the crystallization process, guiding manufacturers in their goals to optimize polymer materials. (2021-01-05)

Novel film that that evaporates sweat six times faster and holds 15 times more moisture
Researchers from NUS Faculty of Engineering created a novel film that is very effective in evaporating sweat from our skin. Promising applications include shoe insoles and linings, as well as underarm pads for sweat absorption. (2021-01-04)

Reliable anti-counterfeit checks under extreme conditions
NUS researchers invented DeepKey, a new anti-counterfeiting technology that performs reliable AI-based authentication under extreme environmental conditions. It is suitable for tagging high-value products such as vaccines, drugs, jewelry and electronics. (2020-12-22)

Review on functional hydrogel coatings
Hydrogel-coated substrates combine the merits of both the substrates and hydrogels, enabling new functions and applications. Typical applications of hydrogel coatings can be found in both medical and non-medical areas, such as soft devices and robotics, invasive medical devices and implants. The emerging topic of functional hydrogel coatings are reviewed from three aspects: functions and applications of hydrogel coatings, methods of preparing hydrogel coatings with strong adhesion, and tests to evaluate the adhesion. (2020-12-22)

'Soft' nanoparticles give plasmons new potential
Rice University scientists couple gold nanoparticles with soft polymers that pull energy from the gold's plasmonic response to light. That energy can then be used to catalyze chemical reactions. (2020-12-22)

Research brief: Researchers discover new way to deliver DNA-based therapies for diseases
University of Minnesota Twin Cities researchers in the Department of Chemistry have created a new polymer to deliver DNA and RNA-based therapies for diseases. For the first time in the industry, the researchers were able to see exactly how polymers interact with human cells when delivering medicines into the body. This discovery opens the door for more widespread use of polymers in applications like gene therapy and vaccine development. (2020-12-18)

Still paying for broken smartphone display? Now, It is automatically fixed
Smartphone display repair cost that caused so many people to cry about, it may no longer be an issue to worry about. Research team in South Korea has developed a smartphone display material that can self-heal from damages. (2020-12-17)

Upcycling: new catalytic process turns plastic bags into adhesives
Only a small percentage of plastic bags and other polyethylene packaging is recycled because only low-value products can be made from this waste. UC Berkeley chemists have created a catalytic process that preserves the desirable properties of polyethylene while adding another attribute - stickiness - that increases the value of the recycled product. The adhesive polyethylene could be used to coat wires and metal implants or bond plastic layers. Even latex paint sticks to it. (2020-12-17)

How long's too long? Effects of crosslinker length on anion-exchange membrane fuel cells
Anion exchange membrane (AEM) fuel cells (AEMFCs), which produce electricity using hydrogen, are considered an alternative to currently used proton exchange membrane fuel cells. However, AEMs have problems with stability in alkaline conditions, which can be overcome by crosslinking--but effects of crosslinker length on AEMFC performance are not well understood. Now, scientists from Korea have elucidated such effects for oxygen-containing crosslinkers and, using an optimally long crosslinker, produced a novel AEMFC with greater performance. (2020-12-17)

Flexible and powerful electronics
A team of researchers led by the University of Tsukuba has developed a method for optimizing the electrical properties of carbon-based conductors by turning them into an ionic gel. This work may open the way for cheap, highly efficient sensors that can be printed on flexible surfaces. (2020-12-16)

Chemists from RUDN University used crab shells to improve palladium catalysts
?hemists from RUDN University synthesized soluble biopolymers based on chitin from crab shells. Together with palladium, they form effective catalysts for organic reactions, and their nanoparticles can be re-used over ten times. (2020-12-14)

When chemistry with green light mimics what happens in life
Taking inspiration from nature, researchers at Queensland University of Technology in Australia and Ghent University in Belgium created a green light-stabilised 3D polymer structure that unfolds itself when left in darkness - the first reported example of a reversible, light-triggered process to fold polymers into single chain nanoparticles. (2020-12-13)

Nanocylinder vibrations help quantify polymer curing for 3D printing
In a step toward making more accurate and uniform 3D-printed parts such as personalized prosthetics and dental materials, researchers at the National Institute of Standards and Technology (NIST) have demonstrated a method of measuring the rate at which microscopic regions of a liquid raw material harden into a solid plastic when exposed to light. (2020-12-10)

New blended solar cells yield high power conversion efficiencies
Researchers at Hiroshima University in Japan have blended together various polymer and molecular semiconductors as photo-absorbers to create a solar cell with increased power efficiencies and electricity generation. (2020-12-09)

Hydrogel could open new path for glaucoma treatment without drugs or surgery
Researchers have developed a potential new treatment for the eye disease glaucoma that could replace daily eye drops and surgery with a twice-a-year injection to control the buildup of pressure in the eye. The researchers envision the injection being done as an office procedure that could be part of regular patient visits. (2020-12-07)

Breakthrough material makes pathway to hydrogen use for fuel cells under hot, dry conditions
A collaborative research team, including Los Alamos National Laboratory, University of Stuttgart (Germany), University of New Mexico, and Sandia National Laboratories, has developed a proton conductor for fuel cells based on polystyrene phosphonic acids that maintain high protonic conductivity up to 200 C without water. (2020-12-07)

Reversible stickiness is something to smile about
Researchers from Tokyo Medical and Dental University (TMDU) have developed a cross-linker for curing dental cement that can be degraded with UV light. The polyrotaxane cross-linker contains an o-nitrobenzyl ester group that is unstable under UV irradiation. The adhesion strength of a polymer block fixed to bovine dentin with cement stabilized using the cross-linker was significantly reduced after only 2 minutes of irradiation, showing that the linker has potential to ease the removal of temporary dental interventions. (2020-12-04)

Researchers confront optics and data-transfer challenges with 3D-printed lens
Researchers have developed new 3D-printed microlenses with adjustable refractive indices - a property that gives them highly specialized light-focusing abilities. This advancement is poised to improve imaging, computing and communications by significantly increasing the data-routing capability of computer chips and other optical systems, the researchers said. (2020-12-03)

Cell membranes in super resolution
For the first time ever, expansion microscopy allows the imaging of even the finest details of cell membranes. This offers new insights into bacterial and viral infection processes. (2020-12-02)

Ultrasensitive transistor for herbicide detection in water
University of Tokyo researchers have fabricated a tiny electronic sensor that can detect very low levels of a commonly used weed killer in drinking water. (2020-12-01)

Patterning method could pave the way for new fiber-based devices, smart textiles
Multimaterial fibers that integrate metal, glass and semiconductors could be useful for applications such as biomedicine, smart textiles and robotics. But because the fibers are composed of the same materials along their lengths, it is difficult to position functional elements, such as electrodes or sensors, at specific locations. Now, researchers reporting in ACS Central Science have developed a method to pattern hundreds-of-meters-long multimaterial fibers with embedded functional elements. (2020-11-25)

Miniscule robots of metal and plastic
Researchers at ETH Zurich have developed a technique for manufacturing micrometre-long machines by interlocking multiple materials in a complex way. Such microrobots will one day revolutionize the field of medicine. (2020-11-24)

Taking a shine to polymers: Fluorescent molecule betrays the breakdown of polymer materials
Scientists at the Tokyo Institute of Technology (Tokyo Tech) have come up with a simple method to evaluate the strength and performance of polymer materials. They present their innovation in the latest issue of Angewandte Chemie International Edition, and hope that their work will enable scientists and engineers to better evaluate the polymers they work with, and eventually synthesize better ones. (2020-11-24)

Carbon nanocomposites are now one step closer to practical industrial
Multifunctional materials were designed to allow self-diagnostic monitoring through an inexpensive technique. These materials were created by adding the carbon nanoparticles to polymer matrices. Essentially, the use of such materials has the potential to replace sensors in weight critical systems such as aircraft structures, with the material itself being able to provide measurements. (2020-11-23)

New solvent-based recycling process could cut down on millions of tons of plastic waste
Multilayer plastic materials are ubiquitous in food and medical supply packaging, particularly since layering polymers can give those films specific properties, like heat resistance or oxygen and moisture control. But despite their utility, those ever-present plastics are impossible to recycle using conventional methods. (2020-11-20)

Building a better electronic touch
Two new studies introduce materials that improve the capabilities of electronic 'touch,' boosting the multimodality of artificial skin so that it more resembles the capabilities of human skin. (2020-11-19)

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