Infrared Drying
Infrared Drying - Related Videos
08:11
Infrared Spectroscopy
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2023
Source: Vy M. Dong and Zhiwei Chen, Department of Chemistry, University of California, Irvine, CA This experiment will demonstrate the use of infrared (IR) spectroscopy (also known as vibrational spectroscopy) to elucidate the identity of an unknown compound by identifying the functional group(s) present. IR spectra will be obtained on an IR spectrometer using the attenuated total reflection (ATR) sampling technique with a neat sample of the unknown.
01:30
Dry Friction
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2023
Dry friction occurs between two solid surfaces in contact as they attempt to move relative to one another. In daily life, dry friction is encountered in various forms, such as when walking on the ground, sliding an object across a table, or rubbing hands together. Despite its ubiquity, the underlying mechanisms behind dry friction are not readily visible. To illustrate this concept, imagine a wooden crate resting on a rough, non-uniform horizontal surface. When an external force is applied to...
10:12
Near-infrared Fluorescence Imaging of Abdominal Aortic Aneurysms
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2023
Source: Arvin H. Soepriatna1, Kelsey A. Bullens2, and Craig J. Goergen1 1 Weldon School of Biomedical Engineering, Purdue University, West Lafayette, Indiana 2 Department of Biochemistry, Purdue University, West Lafayette, Indiana Near-infrared fluorescence (NIRF) imaging is an exciting optical technique that utilizes fluorescent probes to visualize complex biomolecular assemblies in tissues. NIRF imaging has many advantages over conventional imaging methods for noninvasive imaging of diseases.
09:38
Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies
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Cited by 4 •
2015
We describe the generation of far-infrared radiation using an optically pumped molecular laser along with the measurement of their frequencies with heterodyne techniques. The experimental system and techniques are demonstrated using difluoromethane (CH2F2) as the laser medium whose results include three new laser emissions and eight measured laser frequencies.
01:21
Drying Shrinkage
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2024
When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage. A portion of this drying shrinkage can be reversed; if the concrete is...
FAQs
Emitter wavelength and material properties determine where radiation is absorbed. Some materials absorb energy mainly at the surface, while others allow penetration toward the interior. That absorption pattern controls the location of heat generation and influences how moisture migrates before evaporation. Engineers therefore select radiation conditions with the material’s response in mind to promote more uniform drying.
Radiation intensity, material temperature, exposure time, and airflow jointly shape the drying result. Increasing supplied energy or extending exposure can accelerate moisture removal, but process control remains necessary to avoid excessive heating. Airflow contributes to the drying environment by supporting moisture removal from the material. Adjusting these variables helps balance throughput, energy use, and product quality.
Infrared drying can shorten the period during which a product remains exposed to heat. Because radiation transfers energy directly to the material’s surface and may reach its interior, moisture removal can proceed without relying solely on long-duration heating. Reducing total heating time may help limit quality changes associated with prolonged thermal exposure while maintaining controlled moisture evaporation.
Engineers consider the material’s properties, the desired drying outcome, and the required production rate before adjusting radiation intensity, temperature, exposure time, and airflow. These variables determine how rapidly energy enters the material and how moisture leaves it. Coordinating them provides a means to control drying time, energy consumption, and product quality rather than optimizing only one factor.
Infrared drying applies to a broad range of engineered products, including foods, coatings, textiles, polymers, and other manufactured materials. The appropriate conditions depend on how each material absorbs radiation and responds to heating. This flexibility makes the method relevant to processes where moisture removal must be accelerated while maintaining control over the material’s final quality.
The method supports continuous processing, allowing materials or products to pass through a controlled drying operation rather than relying only on prolonged batch heating. Engineers can regulate radiation intensity, temperature, exposure time, and airflow as part of the process. This integration may increase throughput, shorten drying time, and improve consistency across manufactured products.