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The award-winning Phase Change Matters blog tracks the latest news and research on phase change materials and thermal energy storage. E-mail tips and comments to Ben Welter, communications director at Entropy Solutions. Follow the blog on Twitter at @PureTemp. Subscribe to the weekly PCM newsletter. Or join the discussion on LinkedIn.

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PCM briefing: Acumen invests in Promethean Power Systems; Viking Cold wins Cleanie award

Ben Welter - Monday, October 14, 2019

• Social venture capital investor Acumen has invested an undisclosed amount in Promethean Power Systems Inc., which makes PCM-based refrigeration systems for cold-storage and milk chilling applications in off-grid and partially electrified areas of developing countries. Jiten Ghelani, chief executive of Promethean, which is based in Boston, Mass., and Pune, India, said the investment would help the company accelerate the adoption of its products across India and other markets, and also expand its cooling-as-a-service offerings. 

Air New Zealand pillow• Two new consumer products featuring temperature-control fabrics from Outlast Technologies hit the market recently: A pillow designed to improve the quality of sleep for passengers on Air New Zealand's long-haul flights and a Calloway pullover designed to keep golfers cool in warm weather and warm in cold weather

Viking Cold Solutions of Houston, Texas, won a Platinum Cleanie Award last month for a PCM-based storage and demand management project in Massachusetts. The Cleanie Awards, presented at this year's North America Smart Energy Week in Salt Lake City, Utah, recognize companies and individuals shaping the clean-tech and renewable energy industries. The Viking Cold project involved the installation and commissioning of TES systems to store refrigeration energy and facilitate 1.3 MW of energy demand reduction across eight customer facilities, including the Greater Boston Food Bank.

Sonoco ThermoSafe of Arlington Heights, Ill., has introduced a new temperature-controlled box rental service. "The new Orion r product line is based on the existing ChillTech product," said Ben VanderPlas, manager of engineering and product management at Sonoco. "We’ve made changes to make the product more reusable (added EPP) and have increased the VIP insulation. The PCMs remain the same, using paraffin-based materials. ChillTech was developed by Laminar Medica in the UK prior to their acquisition and integration into the ThermoSafe business. Solutions will exist for 2-8, 15-25 and frozen temperatures."

Sonoco ThermoSafe has posted an opening for a Senior Account Manager Europe, to be based in Netherlands.

Microtek Laboratories Inc. of Dayton, Ohio, has introduced a new line of PCM-equipped pouches and panels for use in temperature-controlled shipping.

Patent application: Temperature regulating polyurethane gel

Ben Welter - Thursday, August 15, 2019

U.S. patent application 20190249058 (applicant Technogel Italia S.r.L., Pozzoleone, Italy):

"A method for the production of a temperature regulating polyurethane gel composition and corresponding articles includes fatty acid esters as a phase change material (PCM) directly incorporated in the fluid phase of a polyurethane gel without encapsulation. The liquid or melted PCM is solved in the polyol component of the gel and is able to crystallize and melt within the gel structure reversibly. The polyurethane gels are under-crosslinked and include an at least nominal three functional ethylene oxide-comprising alkylene oxide polyether polyol with 0 to 40% EO and an isocyanate with an effective functionality of from 1.5 to 3.5. The gels are useful in articles where the gel can be positioned close to the human body for temperature regulating purposes, and especially to improve the sleeping comfort of a resting person."

http://www.freepatentsonline.com/20190249058.pdf

Croda began work on new microencapsulated PCM four years ago

Ben Welter - Friday, July 26, 2019

UK-based Croda International recently announced the launch of a microencapsulated form of biobased phase change material developed at the company's PCM technical center in Netherlands. The new material is designed to be used to control temperatures in bedding, mattresses, automotive interiors, clothing and other applications.

Jerome Gonthier and Martin ButtersThe development was led by Marco Auerbach and Jerome Gonthier, working with colleagues who have expertise in microencapsulation and acrylic polymer. Martin Butters, a specialist in PCM applications and business development, also supported the project.

Gonthier and Butters provided details on the new material in an email interview.

Q: What prompted the decision to develop this technology?

A: "Having established a range of high-quality bio-based PCMs, market demand led us to explore the microencapsulation of these PCMs. Microencapsulation converts the PCM into particles that are offered to the market in two forms, powder and water-based dispersion. Microencapsulated PCMs are often advantageous for use in composite materials such as coatings, fibers and other matrices where PCM leakage needs to be avoided."

Q: How long did it take to complete the project?

A: "Overall the project ran for about four years leading to the launch of the first products in 2018."

Q: Did the team surmount any unexpected challenges, technical or otherwise?

A: "The challenges were mainly those we expected – achieving microcapsules with good durability, very low levels of free wax and overcoming sub-cooling (reduction in crystallisation temperature due to microencapsulation)."

Q: When did Croda officially launch the technology commercially?

SEM photo of CrodaTherm ME29P (powder grade) A: "The first products, CrodaTherm ME 29D (50% dispersion) and CrodaTherm ME 29P (powder), which are 29º C melting point products, were launched in Q4 2018. 32º C versions will be added to the range shortly and we expect the range to be further extended with other operating temperatures in due course."

Q: Does Croda manufacture fibers and textiles with the microencapsulated PCM? Or does it manufacture the MPCM and sell it to fiber and textile manufacturers?

A: "Croda does not produce fibers or textiles, instead we specialize in offering PCMs that are developed and manufactured in-house, for use in such applications (and many more)."

Q: What specs can you share on the MPCM, such as composition, peak melt point and latent heat storage capacity?

A: "We microencapsulate CrodaTherm bio-based PCMs with an acrylic-type shell. For CrodaTherm ME 29D and ME 29P, peak melting temperature is 29ºC and latent heat is typically about 180 J/g."

Q: Does the MPCM have any properties, such as latent heat storage capacity or ease of manufacture, that sets it apart from competing products?

A: "We use internally produced bio-based PCM, rather than paraffin waxes sourced externally from the market, meaning we have full control over quality and the products have high bio-based content and excellent thermal properties."

Q: Have textiles embedded with this MPCM undergone thermal effusivity testing or other tests that would confirm their effectiveness in managing temperatures in consumer products?

A: "Several tests have been carried out to confirm the performance of materials embedded with mPCM and further work will be carried out, including thermal effusivity."

Q: Will the technology be used in any products scheduled for release this year or next?

A: "A number of projects are underway for different applications, so we’ll have to wait and see!"

Patent application: Polyurethane gel particles, methods and use in flexible foams

Ben Welter - Thursday, June 06, 2019

U.S. patent application 20190169390 (applicant Peterson Chemical Technology LLC, Austin, Texas):

"Combinations of open cell flexible foams with polyurethane gel particles, and methods of making the combinations are described using a variety of procedures. The open cell flexible foam may partially or wholly comprise polyurethane foam and latex foam. ... The composition of claim 1 where the polyurethane gel particles contain at least one phase change material with a solid/liquid phase transition temperature range of from about −10° F. to about 220° F. (about −23° C. to about 104° C.)."

http://www.freepatentsonline.com/20190169390.pdf

PCM briefing: Ice Energy signs distribution deal; Bloom joins Sunamp as board chairman

Ben Welter - Monday, April 22, 2019

Ice Energy of Santa Barbara, Calif., has reached distribution agreements with four California companies to sell, install and maintain its ice-based thermal storage system, the Ice Bear 20. The companies are Correy Baker Heating and Air of Murrieta; Emery Mechanical Engineering of San Diego; H3 of Santa Barbara; and SunRize Mechanical of Temecula. “This distribution network will enable us to further expand our footprint in the residential market in Southern California,” said Marcel Christians, co-COO of Ice Energy.

Sonoco ThermoSafe and AirBridgeCargo Airlines have announced a global partnership agreement for the leasing of the PharmaPort 360 temperature-controlled shipping container. The agreement will enable pharmaceutical shippers to lease PharmaPort 360 containers directly from AirBridgeCargo.

Martin Bloom• Thermal battery maker Sunamp Ltd. of Scotland has appointed Martin Bloom as chairman of the board. Bloom, right, has extensive experience in high-growth technology and renewable energy companies, including Chinese solar company Renesola and Loughborough-based fuel cell specialist Intelligent Energy. Bloom succeeds Sunamp’s founding chairman, Bob Pettigrew, who oversaw its early growth.

Nominations are being accepted for the 2019 Poncelet Prize for Innovation in Microencapsulation, co-sponsored by Procter & Gamble and the Bioencapsulation Research Group. The award recognizes innovation in process design and modernization; development of new core and shell materials; innovation in characterization methods; or innovation in emerging fields of applications. The deadline for submitting nominations is May 31, 2019.

Peli BioThermal is rebranding its Chronos temperature-controlled shippers. CoolGuard PCM will replace Chronos Express, and CoolGuard Advance will replace Chronos Advance. The CoolGuard shippers will offer configurations with fewer components and additional temperature set points, such as 16º C.

• Registration is open for "Phase Change Material & Passive Cooling in Large Venues," a lunch-hour presentation by Henderson Engineers. The free event, sponsored by AIA Kansas City, will be held June 12 at the Center for Architecture & Design in Kansas City, Mo.

Axiotherm GmbH's kraftBoxx thermal energy storage system is a finalist for a Smarter E Award in the renewable energy category. KraftBoxx is a joint development with Klara Energy and Tuxhorn within the scope of the PCM-based HeatSel product line marketed by Axiotherm. Winners will be announced May 15 in Munich.

• PCM expert Harald Mehling's new book is available on Amazon: "Understanding the Basics of Energy: An Introduction from Simple to Complex Situations."

Tempur-Pedic of Lexington, Ky., says its new TEMPUR-breeze mattress will help sleepers "stay up to 8 degrees F cooler through the night." According to Tempur-Pedic: "At about 80°F, the molecules within TEMPUR-breeze’s most efficient Phase Change Material (PCM) to-date, PURECOOL+, activate, shifting from a solid to a liquid to absorb massive amounts of heat. For the first time, Tempur-Pedic’s scientists successfully altered these proprietary molecules to deliver more phase change material, increasing its capacity to absorb heat by 2x compared to other PCM."

• Two new ASHRAE publications will be available in June: "Owner’s Guide for Buildings Served by District Cooling" and an updated edition of the "District Cooling Guide" for designers and building owners around the world.

• Researchers at Sweden's KTH Royal Institute of Technology have developed a polyethylene glycol-infused wood material that could be used to make windows that absorb heat during the day and release it into the home at night. The researchers are working to increase the heat storage capacity of the transparent wood, Smithsonian.com reports.

PCM briefing: 2-day training school in Barcelona; Alexium to launch foam bedding, 'top of bed' products

Ben Welter - Friday, March 15, 2019

A training school on thermal energy storage material selection, optimization and characterization will be offered May 20-21 at the University of Barcelona. The university's Center for Design and Optimization of Processes and Materials is hosting the event. The fee is 230 euros. Lecturers include Camila Barreneche, Ana Inés Fernández, Mercè Segarra and Pablo Gamallo of the University of Barcelona; Luisa Cabeza and Alvaro de Gracia of the University of Lleida, Spain; and Yulong Ding of the University of Birmingham, United Kingdom.

Alexium International Group Ltd. was among the companies making presentations this week at the Gabelli & Company Specialty Chemicals Conference in New York City. Alexium, based in Greer, S.C., and Perth, Australia, makes flame-retardant and PCM-enhanced fabric treatments. Among its "cornerstone" initiatives is a plan to launch a new product line in early 2019, Alexicool FM, the application of the company's Alexicool technology to foam mattress and "top of bed" products.  

• Thermal materials specialist va-Q-tec reports that its annual revenue grew by 8 percent in 2018. The company, based in Würzburg, Germany, said sales from its products business, including vacuum insulation panels and phase change materials, increased by 12 percent to 20.1 million euros, up from 18 million euros in 2017. However, its earnings fell by 58 percent, to 3 million euros. It blamed earnings decrease on investment costs and a rise in sales from its lower-margin products business.

• Australian researchers are challenging the belief that 22° C (72° F) is the optimum temperature to maintain worker productivity. A team from Griffith University’s School of Engineering and Built Environment and Cities Research Institute performed an extensive review of research literature on the relation of moderate thermal environment to cognitive performance. "From the research point of view," the lead researcher, Fan Zhang, said in an interview with the Cooling Post, "there is no empirical evidence that this temperature [22ºC] should be maintained. In effect, it is inconsistent with the already-established comfort benchmarks such as ASHRAE 55-2017, which recommends a summer time thermal comfort zone of 23-26ºC. I would say 23-26 is a safe summer temperature set point range for western developed countries."

Need a PCM coating on that coat? Ohio company has a solution

Ben Welter - Friday, March 01, 2019

Therma-SprayMCMENT Inc., an Ohio company that makes a PCM spray designed for use by consumers, launched a new website last month, teamapini.com, to market the product.

"We have been working on the Team Apini Therma-Spray product for a couple of years to give consumers a way to apply PCM technology to the clothing, bedding or other textile products they may already own," said Monte Magill, the company's senior vice president for PCM technologies. The coating is designed to absorb and release thermal energy to enhance thermal comfort.

"It is a water-based formulation containing microencapsulated PCMs and a heat curable binder material to affix the microPCMs to the various textile substrates," said Magill, who has worked in the PCM industry since the mid-1990s. "We do the final packaging in house but have the microPCMs and the binder formulation contract manufactured."

Therma-Spray-treated socks are also available on the site. The company has been selling Infinite R PCM products for the building and construction industry on its main site, mcmentinc.com, since 2016.

Magill says more retail products are in the pipeline: "Look for Team Apini thermal underwear, henleys, pillow cases and sheeting, a bunzy protector (seat cushion thermal protector for home, auto, camping, stadium, etc.), heating and cooling packs (for work, first responder and dietary applications) as well as an equestrian line we are working on now for both horse and rider (dressage focus)."

Patent application: Three-dimensional polymeric fiber matrix layer for bedding products

Ben Welter - Friday, March 01, 2019

U.S. patent application 20190053632 (applicant Serta Simmons Bedding LLC, Atlanta, Georgia)

"A three dimensional polymeric fiber matrix layer including a phase change material coated thereon for use in a bedding product such as a mattress is disclosed. The phase change material is selected to provide improved cooling properties, which along with the free volume provided by the three dimensional polymeric fiber matrix markedly improves temperature management when used in a bedding product."

http://www.freepatentsonline.com/20190053632.pdf

Related:

Upcycled mattress nucleus of essential foam elements

PCM briefing: PureTemp joins RSPO; Reda's new PCM fabric on display in Milan

Ben Welter - Monday, February 18, 2019

PureTemp LLC has joined the Roundtable for Sustainable Palm Oil as an associate member. The nonprofit organization, which has more than 4,000 members worldwide, promotes the growth and use of sustainable oil palm products. In November, RSPO adopted stricter standards for certified sustainable palm oil, including a total ban on deforestation by its members.

Reda Group's new Active Phase temperature-control fabric was on display at the Milan fabric trade show earlier this month. The material uses phase change material to keep body temperature constant when ambient temperature fluctuates. Reda says the material features enhanced breathability and softness and is "easy to clean, even in water."

University of Maryland fabric•  University of Maryland researchers have created a temperature-control fabric that does not rely on phase change material. The fabric changes its insulating properties in response to the environment. In warm and humid conditions, the fabric allows radiant heat to pass through. When conditions become cooler and drier, the fabric reduces the heat that escapes. Two types of synthetic materials in the fabric — one that absorbs water and another other that repels it — are coated with carbon nanotubes. The fibers warp and relax in response to changing humidity, opening and closing pores in the fabric. 

• In interviews with Advanced Textiles Source, four entrepreneurs were asked: What do you wish you had known early on when you were first dealing with intellectual property law and patent issues? “Get feedback on why you need a patent,” said Jeremy Wall, founder and CEO of smart-clothing startup Lumenus. “Where else could you spend $20,000?” Said Matt Kolmes, CEO of VOLT Smart Yarns: “Even if you are on a tight budget, file that Provisional application immediately before you show your idea to anyone, or talk about it with anyone."

• The Marie Sklodowska-Curie Action program is seeking applicants for a one- to two-year research fellowship at the Oslo Metropolitan University. The European Union-funded fellowship will focus on the energy-performance aspects of phase change material in buildings. "In this collaboration," OsloMet says, "we intend to gain our understanding and explore about the micro-structural aspect to relate the macro-scale behavior at continuum level." The application deadline is March 7.

Patent application: Mattress for improved sleep

Ben Welter - Thursday, February 07, 2019

U.S. patent application 20190038040 (applicant Technogel Italia S.r.l., Pozzoleone, Italy):

"Mattresses and mattress toppers having an upper layer including a high heat capacity material are disclosed. The mattress is configured to reduce a core body temperature of the body supported thereon, and thus induce improved sleep, measurable as an increase in the time spent in slow wave sleep relative to standard mattresses having lower heat capacities. The high heat capacity of the mattress may be attributable to the geometry and nature of the support material and optional additives, including polymer gels and phase change materials. Methods for improving sleep quality and uses of the high heat capacity mattresses to improve sleep quality are also disclosed."

http://www.freepatentsonline.com/20190038040.pdf