نتایج جستجو برای: novolac

تعداد نتایج: 147  

Journal: :Chemical Engineering Journal 2022

Tubular supported carbon molecular sieve membranes (CMSMs) with high hydrophilicity and perm-selectivities for water suitable ethanol dehydration were developed from a Novolac oligomer phenolic resin as precursor. Alpha alumina CMSMs resulted in 1.69 times higher surface roughness than zirconia supports. The 48% selective layer thickness. According to pervaporation results, permeance decreased ...

Journal: :Advances in Space Research 2021

Deployable space structures are being built from thin-walled fiber-reinforced polymer composite materials due to their high specific strength, stiffness, and designed bistability. However, the inherent viscoelastic behavior of resin matrix can cause dimensional instability when is stored under strain. The extended time stowage between assembly deployment in result performance degradation worst ...

2009
Hui Pan Chung-Yun Hse Todd F. Shupe

Wood liquefaction using an organic solvent and an acid catalyst has long been studied as a novel technique to utilize biomass as an alternative to petroleum-based products. Oxalic acid is a weaker organic acid than a mineral acid and wood liquefaction with oxalic acid as a catalyst will result in a higher amount of wood residue than that with a mineral acid. Yet the wood residue can be used as ...

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