A novel photosensitive ternary complex consisting of phenol-formaldehyde resin, sodium dodecyl sulfate, and diazo resin

Abstract

A novel photosensitive ternary complex formed from phenol‐formaldehyde resin (PR), sodium dodecyl sulfate (SDS), and diazo resin (DR) was developed. In the presence of SDS, PR remains soluble in water when its solution is neutralized. The PR‐SDS‐DR ternary complex forms when DR is added to the PR‐SDS solution. The ternary complex dissolves in polar solvents such as dimethylformamide and is sensitive toward UV light or heating. It was confirmed that the ionic bond of SO −4 +N2 between SDS and DR converts to a covalent bond after the decomposition of the +N2 group under UV irradiation or heating. As a result, the solubility of PR‐SDS‐DR changes dramatically; that is, after treatment with UV light or heating, PR‐SDS‐DR becomes insoluble in polar solvents. © 2000 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 38: 2566–2571, 2000

Tannin-Furanic Foams Formed by Mechanical Agitation: Influence of Surfactant and Ingredient Ratios

“…Compared to foams obtained by solvent evaporation, additional peaks in the antisymmetric (2924 cm −1 ) and symmetric (2854 cm −1 ) C-H stretching region can be observed in the SDS foam ( Figure 6 ). As these peaks are still present after rinsing with water and ethanol, it is likely that SDS shows chemical interactions with tannin in a similar way as it does with phenol [ 28 , 29 ]. Increased peak intensity of the C=C stretching vibration at 1510 cm −1 might indicate an increased presence of 2,5-disubstituted furan ring [ 30 ].…”

Tannin-Furanic Foams Formed by Mechanical Agitation: Influence of Surfactant and Ingredient Ratios

“…Compared to foams obtained by solvent evaporation, additional peaks in the antisymmetric (2924 cm −1 ) and symmetric (2854 cm −1 ) C-H stretching region can be observed in the SDS foam ( Figure 6 ). As these peaks are still present after rinsing with water and ethanol, it is likely that SDS shows chemical interactions with tannin in a similar way as it does with phenol [ 28 , 29 ]. Increased peak intensity of the C=C stretching vibration at 1510 cm −1 might indicate an increased presence of 2,5-disubstituted furan ring [ 30 ].…”

Encapsulation of Enzymes in Layer-by-Layer (LbL) Structures: Latest Advances and Applications

“…The diazoresin attracted attention because it can improve the stability of the multilayer films by converting weak interactions between neighboring layers into covalent bonds. Furthermore, it may also be applied to a variety of materials containing sulfonate groups, carboxylic acid groups, or phenol groups. − The procedure is simple and involves only two steps: first, ionic (for sulfonate groups) or H-bonding (for carboxylic acid or phenol groups) self-assembly, which forms the initial multilayer; second, UV irradiation, which converts the weak interaction between the neighboring layers to a covalent one (Figure ).…”

Silver-loading in uncrosslinked hydrogen-bonded LBL films: structure change and improved stability

“…Previously Zhang et al prepared a ternary complex of phenolformaldehyde resin (PFR), sodium dodecyl sulfate (SDS), and a diazo resin (DR). 41,42 In the complex, SDS combines with PFR through hydrophobic interaction and simultaneously combines with DR via electrostatic attraction. Here the silver ions play a similar role to SDS in the ternary complex.…”

Tannin-Furanic Foams Formed by Mechanical Agitation: Influence of Surfactant and Ingredient Ratios

“…Compared to foams obtained by solvent evaporation, additional peaks in the antisymmetric (2924 cm −1 ) and symmetric (2854 cm −1 ) C-H stretching region can be observed in the SDS foam ( Figure 6 ). As these peaks are still present after rinsing with water and ethanol, it is likely that SDS shows chemical interactions with tannin in a similar way as it does with phenol [ 28 , 29 ]. Increased peak intensity of the C=C stretching vibration at 1510 cm −1 might indicate an increased presence of 2,5-disubstituted furan ring [ 30 ].…”

Encapsulation of Enzymes in Layer-by-Layer (LbL) Structures: Latest Advances and Applications

“…The diazoresin attracted attention because it can improve the stability of the multilayer films by converting weak interactions between neighboring layers into covalent bonds. Furthermore, it may also be applied to a variety of materials containing sulfonate groups, carboxylic acid groups, or phenol groups. − The procedure is simple and involves only two steps: first, ionic (for sulfonate groups) or H-bonding (for carboxylic acid or phenol groups) self-assembly, which forms the initial multilayer; second, UV irradiation, which converts the weak interaction between the neighboring layers to a covalent one (Figure ).…”

Silver-loading in uncrosslinked hydrogen-bonded LBL films: structure change and improved stability

“…Previously Zhang et al prepared a ternary complex of phenolformaldehyde resin (PFR), sodium dodecyl sulfate (SDS), and a diazo resin (DR). 41,42 In the complex, SDS combines with PFR through hydrophobic interaction and simultaneously combines with DR via electrostatic attraction. Here the silver ions play a similar role to SDS in the ternary complex.…”

Tannin-Furanic Foams Formed by Mechanical Agitation: Influence of Surfactant and Ingredient Ratios

“…Compared to foams obtained by solvent evaporation, additional peaks in the antisymmetric (2924 cm −1 ) and symmetric (2854 cm −1 ) C-H stretching region can be observed in the SDS foam ( Figure 6 ). As these peaks are still present after rinsing with water and ethanol, it is likely that SDS shows chemical interactions with tannin in a similar way as it does with phenol [ 28 , 29 ]. Increased peak intensity of the C=C stretching vibration at 1510 cm −1 might indicate an increased presence of 2,5-disubstituted furan ring [ 30 ].…”

Encapsulation of Enzymes in Layer-by-Layer (LbL) Structures: Latest Advances and Applications

“…The diazoresin attracted attention because it can improve the stability of the multilayer films by converting weak interactions between neighboring layers into covalent bonds. Furthermore, it may also be applied to a variety of materials containing sulfonate groups, carboxylic acid groups, or phenol groups. − The procedure is simple and involves only two steps: first, ionic (for sulfonate groups) or H-bonding (for carboxylic acid or phenol groups) self-assembly, which forms the initial multilayer; second, UV irradiation, which converts the weak interaction between the neighboring layers to a covalent one (Figure ).…”

Silver-loading in uncrosslinked hydrogen-bonded LBL films: structure change and improved stability

“…Previously Zhang et al prepared a ternary complex of phenolformaldehyde resin (PFR), sodium dodecyl sulfate (SDS), and a diazo resin (DR). 41,42 In the complex, SDS combines with PFR through hydrophobic interaction and simultaneously combines with DR via electrostatic attraction. Here the silver ions play a similar role to SDS in the ternary complex.…”