Knowledge on moisture transport in wood is important for understanding its utilization, durability and product quality. Moisture processes can be studied by Nuclear Magnetic Resonance (NMR) imaging. By combining NMR imaging with relaxometry, the state of water within identified, i.e. bound to cell wall, free lumen/vessel. This paper presents how monitored quantified terms during uptake drying. Three types from softwood hardwood were selected covering a range low high density wood; pine...

Thermochromic (TC) materials can switch solar absorptance (α) based on temperature stimuli. When coatings with TC properties are applied building envelope surfaces, the amount of heat gains be controlled to reduce heating and cooling demand buildings. To date, limited research has been conducted in investigating optimal coating for application opaque envelopes various scenarios. In this research, a method model using performance simulation (BPS) tools developed coupled python optimize...

Water uptake by multilayer films plays an important role in their performance. Individual layers may consist of different polymeric phases. Understanding the water such systems requires knowledge distribution, its state polymer, and influence on This study illustrates application high-resolution NMR relaxometry for measuring distributions evaluating water–polymer interactions. We studied a two-layered base coat/top coat system, where consisted acrylic, polyurethane, pigment particles,...

The transport of particles within thin, porous media is a complex process which received growing attention due to its applications in filtration, printing and microfluidics devices. effect on liquid imbibition particle clogging can reduce the performance lifetime these applications. However, processes are still not clearly understood challenging investigate. goal this study increase our understanding about concentration thin fibrous membrane filters. In study, an Ultra-Fast Imaging NMR...

Abstract Collagen is an important component of the extracellular matrix (ECM) and plays role in normal tissue maturation pathological processes such as atherosclerosis myocardial infarction. The diagnostics latter diseases using MRI could strongly benefit from use collagen‐specific contrast agents. current study aimed to develop a bimodal liposomal MR agent that was functionalized with CNA35, collagen adhesion protein Staphylococcus aureus bacterium. liposomes were characterized terms CNA35...

The film formation of acrylic latex dispersions, containing different amounts carboxylic acid functional groups by the incorporation methacrylic (MAA), was studied with GARField 1H NMR at various relative humidities (RH). Polymer particles glass-transition temperatures in range from 26 to 50 °C formed films room temperature because hydroplasticization. It found that an increased drying rate due lower RH, evaporation flux water limited polymer. Only second stage this phenomenon more obvious...

The corrosion inhibitor cerium dibutylphosphate, Ce(dbp)3, prevents by and dbp deposition at the alkaline cathode acidic anode respectively. pH dependent Ce(dbp)3 solubility seems to play an essential role in inhibition degree. We found that scarcely dissolves water with a ̃1 mM limit between 2 9, whereas 1, we ̃3 due protonation of dbp, for >9, precipitated as Ce(OH)3. believe dissolution process is important aspect understanding its release from coatings thus inhibition. In case pressed...

Liquid penetration in porous cellulosic materials is crucial many technological fields. The complex geometry, small pore size, and often fast timescale of liquid uptake makes the process hard to capture. Effects such as swelling, vapor transport, film flow water transport within material deviate from well-known relations Lucas-Washburn Darcy's Law. In this work it demonstrated how Ultra-Fast Imaging NMR can be used simultaneously monitor distribution swelling during capillary with a...

The penetration of water into two-layer polymeric films a hydrophilic base layer and hydrophobic top plays an important role in their performance. Little is known about the coupled effects uptake stress such films. To study interactive phenomena, time-dependent distributions film are needed, which cannot be provided by traditional techniques. In this study, high-resolution NMR imaging was used to measure profiles, showing that applied increased both rate amount absorbed water. A model...

A 1D model based on Darcy’s law is proposed to allow quantitative measurements of the penetration depth water-glycerol-hexanediol mixtures in thin porous media using an Automatic Scanning Absorptometer (ASA). The limitations this are discussed with respect nozzle dimensions and liquid depth. scales (viscosity surface tension (η, σ)) parameters (average pore radius (r)) as predicted by for Al2O3 disks that inert components. dynamics PVDF MCE filter membranes show a deviation from law,...

The dynamics of the curing process alkyd coatings is an important aspect for coating performance. formation cross links in film has been followed time using a microimaging nuclear magnetic resonance setup, having spatial resolution 5μm perpendicular to film. During this cross-linking front observed inside position varied with square root time. With help simple reaction model, we have proven that results from fact rate limited by oxygen flux into coating. This model can also explain,...

The concern regarding the effect of chemicals on environment has increased considerably in recent years. Nowadays, technological developments coating industry are largely influenced by environmental issues and subsequent legislation. One these is tendency to replace cobalt as a catalyst with more environmentally friendly alternatives, because studies have indicated possible carcinogenicity. Not much knowledge available effects catalysts (driers) in-depth drying alkyd coatings. Therefore we...

Measuring moisture distributions during fast transport processes in thin porous media is a challenging task. In this paper, Ultra Fast Imaging (UFI) NMR proposed as valuable measurement technique for investigating uptake by achieving temporal resolution of 10 ms and spatial between 14.5 18 μm. This paper gives detailed explanation about the methodology interpretation signal intensity. It shown that there exist specific T1- T2- relaxation time conditions performing UFI experiments with...

The penetration of water-glycerol mixtures in porous Al2O3 is measured using NMR imaging to quantitatively describe the liquid and possible front separation liquids non-transparent media. We have studied dependency on viscosity over two orders magnitude by changing glycerol concentration investigated effect pore size micrometer sub-micrometer regime. show that dynamics can be accurately described Darcy's law for all – media combinations permeability scales with radius squared as predicted...