Thermo Pro X

[Tamar Navratil]

Atthermo Heating Elements, LLC, our mission is to manufacture flexible heating elements of the highest quality, deliver them on time, and provide an unparalleled level of customer service. View us not as a flexible heater vendor, but rather as your engineering partner.

What is Thermo?InstallationDocumentationGetting Started - Rigorous InterfaceGetting Started - Simple InterfaceLatest source codeBug reportsLicense informationCitationWhat is Thermo?Thermo is open-source software for engineers, scientists, technicians andanyone trying to understand the universe in more detail. It facilitatesthe retrieval of constants of chemicals, the calculation of temperatureand pressure dependent chemical properties (both thermodynamic andtransport), and the calculation of the same for chemical mixtures (includingphase equilibria) using various models.

Thermo runs on all operating systems which support Python, is quick to install, and isfree of charge. Thermo is designed to be easy to use while still providing powerfulfunctionality. If you need to know something about a chemical or mixture, give Thermo a try.

The library is designed around base SI units only for developmentconvenience. All chemicals default to 298.15 K and 101325 Pa oncreation, unless specified. All constant-properties are loaded onthe creation of a Chemical instance.

Each property is implemented through an independent object-oriented method, based onthe classes TDependentProperty and TPDependentProperty to allow for shared methods ofplotting, integrating, differentiating, solving, interpolating, sanity checking, anderror handling. For example, to solve for the temperature at which the vapor pressureof toluene is 2 bar. For each property, as many methods of calculating or estimatingit are included as possible. All methods can be visualized independently:

Mixtures are supported and many mixing rules have been implemented. However, there isno error handling. Inputs as mole fractions (zs), mass fractions (ws), or volumefractions (Vfls or Vfgs) are supported. Some shortcuts are supported to predefinedmixtures.

Warning: The phase equilibria of Chemical and Mixture are not presentlyas rigorous as the other interface. The property model is not particularlyconsistent and uses a variety of ideal and Peng-Robinson methods together.

Although not required by the Thermo license, if it is convenient for you,please cite Thermo if used in your work. Please also consider contributingany changes you make back, and benefit the community.

Established in 1962 Thermo-Electra is an independent Dutch manufacturing company specialized in designing and building thermocouple and Pt100 temperature sensors for all industries this includes food & beverage, chemicals, pharmaceuticals, glass, oil & gas, power boiler, R&D and paper milling applications. We offer custom designs to suit your exact needs. The sensors are made to Thermo-Electra exacting quality standards Dekra certified to ISO 9001:2015. Our welding work is EN3834 Part 2, IIW certified by NIL, and authorized holder of the ASME S-stamp. Thermo-Electra stands ready to address your Thermocouple and RTD sensor needs. Fast response, quality products, and superb engineering support are our hallmarks. ATEX and IECEx sensors for hazardous locations also with China Compulsory Certification (3C) for the Chinese market. We offer, together with more than 25 sales channels throughout the world, a reliable partner in production, with technical support and service.

The new Technology Sandbox on the UC San Diego campus will enhance access to cutting-edge technologies and applications. This facility is designed to accelerate collaboration, discovery, technology transfer, workforce development, and data analytics.

The partnership will create a collaborative research framework to increase and accelerate collaborative research, technology development, and innovation. The research will push the new frontiers of science, from cryo-EM to CRISPR to data science.

The partnership establishes a world-class talent pipeline with the creation of new programs that drive equity, diversity, and inclusion as it attracts and develops top talent and future STEM leaders.

The partnership will help transform the carbon footprints of UC San Diego and Thermo Fisher Scientific with a sustainable supply chain for research supplies. By increasing the use of environmentally friendly alternatives to commonly used materials and solutions, the efforts of this partnership will align with UC San Diego's goal of achieving zero waste and Thermo Fisher's ongoing commitment to sustainability.

Thermo Fisher Scientific Inc. is the world leader in serving science, with annual revenue of approximately $40 billion. Our Mission is to enable our customers to make the world healthier, cleaner and safer. Whether our customers are accelerating life sciences research, solving complex analytical challenges, increasing productivity in their laboratories, improving patient health through diagnostics or the development and manufacture of life-changing therapies, we are here to support them. Our global team of more than 100,000 colleagues delivers an unrivaled combination of innovative technologies, purchasing convenience and pharmaceutical services through our industry-leading brands, including Thermo Scientific, Applied Biosystems, Invitrogen, Fisher Scientific, Unity Lab Services, Patheon and PPD. For more information, please visit www.thermofisher.com.

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The water content of thermo-responsive hydrogels can be drastically altered by small changes in temperature because their polymer chains change from hydrophilic to hydrophobic above their low critical solution temperature (LCST). In general, such smart hydrogels have been utilized in aqueous solutions or in their wet state, and no attempt has been made to determine the phase-transition behavior of the gels in their dried states. Here we demonstrate an application of the thermo-responsive behavior of an interpenetrating polymer network (IPN) gel comprising thermo-responsive poly(N-isopropylacrylamide) and hydrophilic sodium alginate networks in their dried states. The dried IPN gel absorbs considerable moisture from air at temperatures below its LCST and oozes the absorbed moisture as liquid water above its LCST. These phenomena provide energy exchange systems in which moisture from air can be condensed to liquid water using the controllable hydrophilic/hydrophobic properties of thermo-responsive gels with a small temperature change.

Hydrogels are attractive soft materials consisting of physically or chemically cross-linked polymer networks and aqueous solutions. A variety of hydrogels have been widely utilized as foods, disposal diaper, contact lenses, and so on because they exhibit fascinating behaviors such as water absorption, swelling, permeability, viscoelasticity, transparency, and biocompatibility. In addition, discovery of the volume phase transition of hydrogels led to the development of not only hydrogel science but also polymer science1,2. Some hydrogels have a unique property that they undergo abrupt changes in their volume in response to environmental changes, such as pH3, temperature4,5, electric field6, light7, and biomolecules8,9. Such stimuli-responsive hydrogels have many potential applications as smart and soft materials in aqueous solutions or in their wet state.

Conceptual illustration of this study. a Water-adsorption and oozing behavior of dried PNIPAAm/Alg IPN gel. b Moisture absorption and oozing behavior of IPN gels caused by temperature changes. c Condensation of moisture using a standard absorbent

We performed cycle tests of moisture absorption and water oozing using the IPN gel because its applications to energy exchange systems such as dehumidifiers with low energy consumption require repetitive water oozing. The cycle tests demonstrated that moisture absorbed into the IPN gel repeatedly oozed out as liquid water during cyclic changes between the temperature below and above the LCST (Figure 4d). In the cycle tests using the IPN gel, we collected 20% water as a liquid state to the totally absorbed moisture. At a temperature above the LCST, because PNIPAAm chains change from hydrophilic to hydrophobic but Alg chains are hydrophilic, hydrophilic Alg chains prevented water from being released out of the IPN gel. This is the reason why absorbed water partially remains in the IPN gel after water oozing out above the LCST. As a result, the repetitive moisture absorption and water oozing provide an energy exchange system with low energy consumption in which moisture from air can be condensed to liquid water using the repeatedly controllable hydrophilic/hydrophobic properties of thermo-responsive gels by a small temperature change.

In this study, we prepared the PNIPAAm/Alg IPN gel for the collection of moisture (gaseous water) as liquid water by a small temperature change, followed by innovative applications of thermo-responsive gels in their dried state. Repetitively the dried IPN gel absorbed considerable moisture from air at temperatures below its LCST and oozed the absorbed moisture as liquid water above its LCST. From the discussions about moisture absorption using Langmuir and BET type models and about the activation energy for water release above the LCST, we can explain the mechanism for the absorption of moisture into the dried IPN gel and oozing it as liquid water as follows. During the moisture absorption into the IPN gel below the LCST, water molecules are adsorbed on both Alg and PNPAAm chains similarly to the moisture absorption into general hydrophilic polymers21,22,23, followed by a slight swelling of the IPN gel. The slight swelling results in hydrophobic hydration of PNIPAAm chains although the gel network is not immersed in an aqueous solution. It is well known that PNIPAAm undergoes a drastic change from hydrophilic to hydrophobic in aqueous solutions with rising temperature above the LCST because the negative entropy of water molecules around the nonpolar regions of PNIPAAm chains dominates. Similarly, the PNIPAAm chains in the IPN gel slightly swollen by moisture absorption change from hydrophilic to hydrophobic by the dehydration based on the negative entropy of water molecules around the PNIPAAm chains with rising temperature. As the PNIPAAm chains become hydrophobic above the LCST, the water molecules on the PNIPAAm chains are desorbed to be condensed as liquid water. Thus, the moisture absorbed into the thermo-responsive IPN gel oozes out as liquid water above the LCST. In contrast, the water molecules adsorbed on the Alg chains are preserved within the IPN gel owing to their high hydrophilicity despite a temperature above the LCST of PNIPAAm. Desorption of water molecules from the PNIPAAm chains results in a slight shrinkage of the gel network. Water molecules on the Alg chains may be squeezed out by the slight shrinkage of the network with oozing water from the PNIPAAm chains. As a result, the thermo-responsive IPN gel can absorb moisture from air and oozing it as liquid water by cycle changes in temperature.

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