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Michael A. Brook

Professor, McMaster University
I am Chemistry Professor and researcher at McMaster University. The main focus of our research work is the preparation of silicone-based materials. Silicone polymers are used in many areas of technology, from LED lighting to biomaterials; most people will be familiar with the feel of silicones as sealants in bathtubs or personal care products like cosmetics and antiperspirant sticks. Our research is focussed on improving the process to make silicones or, more interestingly, to make new silicones.

Silicones are normally complex mixtures of materials. More precise materials have much narrower ranges of properties. We are developing highly branched silicones that can be used to moderate the properties of ‘sticky’ silicone adhesives used in wound dressings and sealants for HEPA filters in sensitive healthcare applications.

As part of a focus on Green Chemistry in our research, we are incorporating natural materials in silicone polymers. The presence of the natural materials significantly improves the sustainability of the silicones. A far more interesting result is the new suite of properties that the natural materials convey into the silicones. We have created silicone elastomers based on soybean oil, prepared thermally stable silicone foams using lignin, an ingredient of wood, and most recently created new silicone copolymers by degrading used automobile tires. In the latter case, none of the materials are green, but the process provides a method that closes the loop on tires by allowing the recovery of useful materials from what is otherwise a complex, environmental burden.

A new recycling technique breaks down old tires into reusable materials

Jan 14, 2020 23:27 pm UTC| Insights & Views Technology

Approximately three billion automobile tires were produced worldwide in 2019 alone. Automobile tires are the classic example of a high-volume product derived from non-renewable petroleum resources that is designed for...

Economy

Beyond the spin, beyond the handouts, here’s how to get a handle on what’s really happening on budget night

Three weeks from now, some of us will be presented with a mountain of budget papers, and just about all of us will get to hear about them on radio, TV or news websites on budget night. The quickest way to find out what...

Johannesburg in a time of darkness: Ivan Vladislavić’s new memoir reminds us of the city’s fragility

Ivan Vladislavić is Johannesburgs literary linkman. He tells us, in the first pages of his new book, The Near North, that before cities were lit, first by gaslight and later electricity, people of means paid torchbearers...

What if the Reserve Bank itself has been feeding inflation? An economist explains

Heres something for the board of the Reserve Bank of Australia to ponder as it meets next month to set interest rates. It has pushed up rates on 13 occasions since it began its attempt to restrain inflation in May...

China’s new world order: looking for clues from Xi’s recent meetings with foreign leaders

There is broad consensus that Chinese foreign policy has become more assertive and more centralised in the decade since Xi Jinping has ascended to the top of Chinas leadership. This has also meant that Chinese foreign...

How India’s economy has fared under ten years of Narendra Modi

More than 960 million Indians will head to the polls in the worlds biggest election between April 19 and early June. The ruling Bharatiya Janata Party (BJP), which is led by Prime Minister Narendra Modi, is seeking a third...

Politics

Labour can afford to be far more ambitious with its economic policies – voters are on board

To say that the Labour party is flying high in the polls is something of an understatement. But despite its consistent lead against the Tories, the opposition finds itself in a rather odd position: on the cusp of power but...

History for sale: what does South Africa’s struggle heritage mean after 30 years of democracy?

One of my favourite statues is the one of Nelson Mandela at the Sandton City shopping centre in Johannesburg. Larger than life, its oversized bronze shoes shimmer in the evening light, polished by the hands of many...

Sudan: civil war stretches into a second year with no end in sight

In the early hours of April 15 2023, the Rapid Support Forces (RSF) a Sudanese paramilitary force attacked the military airstrip in the town of Merowe and deployed troops across strategic locations in Sudans capital,...

Turkey’s suppression of the Kurdish political movement continues to fuel a deadly armed conflict

The world has 91 democracies and 88 autocracies. Yet 71% of the worlds population (some 5.7 billion people) are living under autocratic rule, a big jump from 48% ten years ago. This trend towards authoritarianism can...

Georgia is sliding towards autocracy after government moves to force through bill on ‘foreign agents’

Georgias ruling party attempted to pass a controversial bill on foreign agents in March 2023. The law would have required civil society groups and the media to register as being under foreign influence if they receive...

Science

A Nasa rover has reached a promising place to search for fossilised life on Mars

While we go about our daily lives on Earth, a nuclear-powered robot the size of a small car is trundling around Mars looking for fossils. Unlike its predecessor Curiosity, Nasas Perseverance rover is explicitly intended to...

The rising flood of space junk is a risk to us on Earth – and governments are on the hook

A piece of space junk recently crashed through the roof and floor of a mans home in Florida. Nasa later confirmed that the object had come from unwanted hardware released from the international space station. The 700g,...

Peter Higgs was one of the greats of particle physics. He transformed what we know about the building blocks of the universe

Peter Higgs, who gave his name to the subatomic particle known as the Higgs boson, has died aged 94. He was always a modest man, especially when considering that he was one of the greats of particle physics the area of...

Could a telescope ever see the beginning of time? An astronomer explains

The James Webb Space Telescope, or JWST for short, is one of the most advanced telescopes ever built. Planning for JWST began over 25 years ago, and construction efforts spanned over a decade. It was launched into space on...

US media coverage of new science less likely to mention researchers with African and East Asian names

When one Chinese national recently petitioned the U.S. Citizenship and Immigration Services to become a permanent resident, he thought his chances were pretty good. As an accomplished biologist, he figured that news...

Technology

Mainland China Investors Blocked from Accessing New Hong Kong Bitcoin ETFs

Despite launching new Bitcoin and Ether ETFs in Hong Kong, mainland Chinese investors remain sidelined due to longstanding cryptocurrency bans in their home country. Spot Bitcoin and Ether ETFs Launch in Hong Kong, But...

SHIB Price Climbs as Shibarium Upgrade Sparks Optimism Among Investors

The Shiba Inu cryptocurrency surged over 4% on April 26, buoyed by executive enthusiasm for the forthcoming Shibarium upgrade to enhance the platforms functionality and security. Shibarium Upgrade Fuels Market Optimism,...

China Investigates Digital Yuan Architect Yao Qian Amid CBDC Concerns

Yao Qian, a pivotal figure behind Chinas digital yuan, is under investigation for alleged misconduct, casting uncertainty on the future of Chinas CBDC initiatives. Probe into Yao Qian Shakes Foundations of Chinas...

Shein Joins Facebook, Amazon in EU Digital Regulations Compliance

Under the EU Digital Regulations, Shein has joined tech giants like Facebook, Amazon, and Google in meeting the strict compliance standards set by the EUs Digital Services Act due to its user base surpassing 45 million in...

Metaplanet Inc. Buys $6.25M in Bitcoin, Pivots to Digital Assets

In a strategic financial maneuver, Metaplanet Inc., a prominent Japanese public company, has invested $6.25 million in Bitcoin, marking its entry into the burgeoning cryptocurrency market. Metaplanet Dives into Crypto,...