Phenolic fibers

Phenolic bearings Phenolic compounds Phenolic fiber Phenolic fibers Phenolic foams... 

Finally, it should also be considered that flavonoid-rich foods contain a great diversity of compounds with bioactive properties (for e.g., carotenoids, other phenolics, fiber, and minerals), and multiple interactions occur among all of them. There is also great diversity in the ingestion, absorption, and metabolism of these compounds in different populations, and all of these circumstances could camouflage any effect of flavonoids on disease prevention or treatment. 

High surface area activated carbon fibers were first prepared by direct carbonization and activation of phenolic fibers in steam/CO2 environment at temperatures around 1000°C (Economy and Lin 1976). These activated carbon flbers, manufactured in the form of a fabric, have received increased attention as adsorbents in air treatment processes. Because these fabrics are easy to handle, there is an increasing demand for them in various applications such as protective fabrics, filtration devices, odor absorbents, and for a wide range of ancillary industrial applications. The high cost of these fabrics has limited their potential use for a number of applications. High cost is also an issue for their use in military applications (Mangun et al. 1999). 

Phenolic fibers based on spun and cured novolac resins are infusible. These fibers possess excellent flame and chemical resistance, and they evolve only low smoke or toxic gases. These materials are useful for fire protection suits, insulating gloves, curtains, clothing for foundry workers, and flame resistant papers and felts. Phenolic fibers are rigid and they carbonize in the flame while retaining their form. Therefore, phenohc fibers are useful precursors for carbon fibers [1],... 

Other work [20] used a hybrid of two fabrics, utilizing a PAN or phenolic fiber to supply strength and, yet, can be subsequently activated, whilst the second fiber, normally a cellulosic fiber, can be activated by a different process giving a surprisingly stronger product but, as expected, capable of adsorbing a wider range of molecules. 

Novoloid fiber A phenolic fiber made by cross-linking a melt-spun novolac resin with formaldehyde. Novoloid fibers have good flame resistance, can serve at temperatures to about 220°C, and are used as reinforcement in a range of thermosetting matrices. 

Fibers. The principal type of phenolic fiber is the novoloid fiber (124). The term novoloid designates a content of at least 85 wt% of a cross-linked novolak. Novoloid fibers are sold under the trademark Kynol, and Nippon Kynol and American Kynol are exclusive licensees. Novoloid fibers are made by acid-catalyzed cross-linking of melt-spun novolak resin to form a fully cross-linked amorphous network. The fibers are infusible and insoluble, and possess physical and chemical properties that distinguish them from other fibers. Applications include a variety of flame- and chemical-resistant textiles and papers as well as composites, gaskets, and friction materials. In addition, they are precursors for carbon fibers. 

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