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PUBLIC RELEASE DATE:
11-Apr-2014
Contact: Monika Landgraf presse@kit.edu 49-721-608-47414 Helmholtz Association
This news release is available in German.
Scratches in the car finish or cracks in polymer material: Self-healing materials can repair themselves by restoring their initial molecular structure after the damage. Scientists of the Karlsruhe Institute of Technology and Evonik Industries have developed a chemical crosslinking reaction that ensures good short-term healing properties of the material under mild heating. The research results have now been published in the Advanced Materials journal. DOI:10.1002/adma.201306258
The KIT group headed by Christopher Barner-Kowollik uses the possibility of crosslinking functionalized fibers or small molecules by a reversible chemical reaction for the production of self-healing materials. These so-called switchable networks can be decomposed into their initial constituents and reassembled again after the damage. The advantage is that the self-healing mechanism can be initiated any time by heat, light or by the addition of a chemical substance. "Our method does not need any catalyst, no additive is required," Professor Barner-Kowollik says. The holder of the Chair for Preparative Macromolecular Chemistry at KIT studies syntheses of macromolecular chemical compounds.
It took about four years of research for the working group of Barner-Kowollik, together with the Project House Composites of Creavis, the strategic innovation unit of Evonik, to develop a novel polymer network. At comparably low temperatures from 50C to 120C, the network exhibits excellent healing properties within a few minutes. Reducing the time needed for healing and optimizing the external conditions, under which the healing process takes place, are the major challenges of research relating to self-healing materials. Using the healing cycle developed by them, the KIT researchers have found a large number of intermolecular compounds that close again within a very short term during cooling. Mechanical tests, such as tensile and viscosity tests, confirmed that the original properties of the material can be restored completely. "We succeeded in demonstrating that test specimens after first healing were bound even more strongly than before," Barner-Kowollik says.
The self-healing properties can be transferred to a large range of plastics known. Apart from self-healing, the material is given another advantageous property: As flowability is enhanced at higher temperatures, the material can be molded well. A potential field of application lies in the production of fiber-reinforced plastics components for automotive and aircraft industries.
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In the consortium developing the novel crosslinking reaction, the chemical company of Evonik is the industry partner. The research partners of KIT are the Leibniz Institute of Polymer Research, Dresden, and the Australian National University, Canberra.
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Toronto, Canada (PRWEB) April 09, 2014
E-M Air Systems, the leading provider of custom commercial, residential, and industrial air conditioning and heating repair, maintenance, and installation services in the Greater Toronto Area, is instructing its clients on ways they can still cut costs on their heating bill despite the rate increase for natural gas.
Its no secret now that the Ontario Energy Board has given approval for distributors of natural gas to increase their costs to consumers. Enbridge, an energy transportation company, has taken the most liberty with this approval, raising their rates by 40% beginning this spring. However, the Energy Board has stated that this increase is only temporary, and that they will revisit the approval on a quarterly basis. (Source: Spears, J., Enbridge gets hefty interim rate increase, The Toronto Star, March 27, 2014; http://www.thestar.com/business/2014/03/27/enbridge_gets_hefty_interim_rate_increase.html.)
The average consumer is looking at a $400 annual increase to their utility bill. That is certainly a considerable amount of money for most homeowners, says Jack Marrano, owner of E-M Air Systems. E-M Air Systems recognizes the frustration consumers are dealing with, but homeowners now need to become proactive and find simple ways to cut down on their energy costs and save money.
Marrano advises that the first step homeowners need to take to help level out their utility costs is to maintain and upgrade their heating, ventilation, and air conditioning (HVAC) systems. However, just maintaining or upgrading the HVAC systems will not significantly reduce fees. Maintenance will have to be combined with proper insulation, air sealing, and suggested thermostat settings that vary throughout the day; only through using this comprehensive approach will homeowners notice a difference in their utility bills.
For maintenance, he suggests that furnace filters be cleaned once a month and that warm-air registers, baseboard heaters, and radiators are not blocked by any furniture or carpeting. In addition, drapes on south-facing windows should be kept open during the day through the winter months to allow in warming sunlight, with those same drapes being kept closed during the summer. Also, remember to shut off exhaust fans after cooking or bathing. (Source: Tips: Heating and Cooling, U.S. Department of Energy web site, May 30, 2012; http://energy.gov/energysaver/articles/tips-heating-and-cooling.)
A contractor should be able to give accurate advice on suitable and affordable products and techniques that can help reduce energy consumption and save money, Marrano concludes. E-M Air Systems can play a role in these efficiencies. We have been serving clients in Southern Ontario for over 25 years and know what it takes to create an efficient residential environment.
E-M Air Systems Inc. has been installing custom commercial, residential, and industrial heating, ventilation, and air conditioning (HVAC) systems in the new construction and retrofit market in Southern Ontario since 1987. Because E-M Air Systems Inc. designs every HVAC system it installs and manufactures the duct work in its own sheet metal shop, clients do not have to rely on outside firms for costly blueprints or work; this translates into greater value and the industrys most competitive pricing. E-M Air Systems Inc. is a member of the Heating, Refrigeration and Air Conditioning Institute of Canada (HRAI), the Canadian Home Builders Association, the Workplace Safety and Insurance Board, the Technical Safety and Standards Authority (TSSA) and the Residential Heating Ventilation Contractors Association (RHVCA). To learn more about E-M Air Systems Inc, visit the companys web site at http://www.EMAir.ca or call E-M Air Systems Inc. toll-free 1-800-893-6793.
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E-M Air Systems Reveals How You Can Still Save Money Despite 40% Natural Gas Increase in Ontario
With the majority of the country finally thawing out from a tough winter, now is the ideal time to get your house in shape for the pending warm weather.
Spring is the perfect time after winter to see what the damage is, says Michael Corbett, Trulia's real estate expert and author. Its also an ideal time to prevent having to make those repairs in the height of the summer season when some are much more costly.
Real estate experts say the first item on homeowners to-do list is checking their home heating and cooling system and/or air conditioner units. Heating repair people tend to be in less demand in warmer months, which means customers might be able to catch a price break.
You also want to test the AC now because come the middle of the summer when its 110 degrees, youll never be able to get an AC specialist on the phone. And when you do reach someone, its going to cost three times as much, says Corbett.
Conserving energy, particularly during the hot days of summer and cold nights in winter, can go a long way in saving money on gas, oil and electricity bills, which is why now is the time to swap old thermostats for smart ones that can be programmed to coincide with the owners activities.
Sealing any gaps or holes around windows, doors and electrical outlets will ensure the cool air stays in the home during the summer. Spring is also the ideal time to test and replace if necessary fire and carbon monoxide detectors. According to Nan Shanahan, owner of Better Homes and Gardens Real Estate The Shanahan Group, smoke detectors typically last five years and 10 years for a CO2 detector.
Shanahan says now is also the time to check and repair any loose bricks on chimneys, and to make sure all gutters and downspouts are cleaned out and in the right location.
With spring rain, you dont want water in the basement, she says. Its a really great idea to make sure all the gutters are cleaned out and theres no water penetration problems.
Preventing air from leaking out is not only helpful with lowering cooling costs, it also keeps critters out of a home. According to Redfin listing agent Tonya Nelson, homeowners need to check the insulation in attics and crawl spaces to make sure no animals made their home or nest there during the winter. People need to do a visual walk around the house, says Nelson.
Having roof repairs done in the spring can save a lot of money. Months of heavy snow piling up and later melting can cause a lot of damage and result in leaks if problems go unfixed.
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As April opened with wind-driven snow and temperatures that still featured wind-chill readings, Minnesotans longingly looked from their windows waiting for the day when ice-covered lakes would open and fresh-water fishing could resume. Its a way of life and in Minnesota sport fishing is a $2.8 billion industry of vital importance to the states economy and well-being.
The importance of our states natural resources can be taken for granted. It shouldnt be. As winter releases its long-lasting grip it is time to take stock of the condition of state water bodies and reinforce the need for better stewardship. There is work to do.
The Minnesota Department of Natural Resources has produced findings on the condition of our lakes and rivers that cant be ignored. The DNR has identified bodies of water that are infested with a number of invasive aquatic plants, including nearly 300 lakes with infestations of Eurasian water milfoil. Nearly 200 lakes and rivers are infested with zebra mussels.
The seriousness of invasive aquatic plant species and zebra mussels is often dwarfed by the growing threat of Asian carp that continue to migrant north and pose a threat of reaching northern Minnesota. Pictures of carp jumping into boats grab our attention. The problems related to weeds and mussels that clog lakes and choke off nutrients needed by fish are hidden below the surface.
It is encouraging that some positive signs are coming from St. Paul. Gov. Mark Dayton and the Legislature are crafting a bonding bill that provides badly needed dollars to address the seriousness of many aquatic invasive species.
There is support for $6 million in bonding dollars to assist the Minnesota Aquatic Invasive Species Research Center at the University of Minnesota. The center operates in partnership with the DNR in the effort to combat plant infestations, zebra mussels and the spread of carp. Funding is desperately needed. The bonding dollars would provide upgrades to the centers century-old building and target inadequate water, electrical and heating and cooling systems. With an improved facility, the center expects to add more student researchers tasked with studying invasive aquatic plants. A $3 million bonding proposal would be matched by $3 million in University dollars for a new lab to study problems related to bees.
Our lawmakers need to make sure these projects are not left on the cutting table when the final bonding bill is carved out. They are simply too important to pass over.
Bonding for a $5 million dam repair and carp barrier on the Rum River in Anoka has fallen from the funding list. The city of Anoka has withdrawn its request this year and the dam repair ranks only 42nd on the DNRs priority list. The threat of carp migrating north to Mille Lacs Lake through the Rum River is real and the Anoka barrier is a step to protect the states marquee walleye fishery from a carp infestation. It should not be ignored for long.
It is not only lawmakers who must be good stewards. Everyone who launches a boat needs to do their part to avoid spreading aquatic plants and zebra mussels from lake to lake. And there have been positive results.
The DNR continues to work with local government to train monitors who check boats at launch areas. Conservation officers remain vigilant and fewer violators were issued misdemeanor tickets in 2013 compared to 2012. Watershed district boards and private lake associations are stepping forward. These efforts, coupled with public education, will help slow the spread of invasive aquatic plant species and zebra mussels that are here now.
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Our viewpoint: Take steps to protect state waters