Silanization of a Metal–Polyphenol Coating onto Diverse Substrates as a Strategy for Controllable Wettability with Enhanced Performance to Resist Acid Corrosion

Abstract

Wettability is a crucial characteristic of materials that plays a vital role in surface engineering. Surface modification is the key to changing the wettability of materials, and a simple and universal modification approach is being extensively pursued by researchers. Recently, metal−phenolic networks (MPNs) have been widely studied because they impart versatility and functionality in surface modification. However, an MPN is not stable for long periods, especially under acidic conditions, and is susceptible to pollution by invasive species. Spurred by the versatility of MPNs and various functionalities achieved by silanization, we introduce a general strategy to fabricate functionally stable coatings with controllable surface wettability by combining the two methods. The formation process of MPN and silane−MPN coatings was characterized by spectroscopic ellipsometry (SE), UV−visible−near-infrared (UV−vis−NIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), atomic force microscopy (AFM), water contact angle (WCA), etc. We found that the stability of the MPN was greatly enhanced after silanization, which is attributed to the cross-linking effect that occurs between silane and the MPN, namely, the cross-linking protection produced in this case. Additionally, the wettability of an MPN can be easily changed through our strategy. We trust that our strategy can further extend the applications of MPNs and points toward potential prospects in surface modification.

Cerium–Luteolin Nanocomplexes in Managing Inflammation-Related Diseases by Antioxidant and Immunoregulation

“…Figure f displayed the O 1s XPS spectra of CeLutNCs. The binding energies of 531.2, 532.7, 533.7, and 534.9 eV corresponded to the CO, C–OH, C–OC, and OC–OH functional groups, respectively . It is worth noting that the Ce 3d spectra of CeLutNCs showed nine peaks after deconvolution (Figure g).…”

“…The binding energies of 531.2, 532.7, 533.7, and 534.9 eV corresponded to the C�O, C−OH, C−O�C, and O�C− OH functional groups, respectively. 23 It is worth noting that the Ce 3d spectra of CeLutNCs showed nine peaks after deconvolution (Figure 1g). The binding energies at 882.6, 887.86, 901.5, 907.6, and 916.4 eV were assigned to the Ce 4+ oxidation state, while the peaks at 881.2, 885.8, 899.9, and 904.5 eV were attributed to the Ce 3+ oxidation state.…”

Material priority engineered metal-polyphenol networks: mechanism and platform for multifunctionalities

“…Next, the decomposition process of preformed PC-MPNs induced by Fe 3+ was explored to deeply understand the formation mechanism of the PC-MPN coating. Considering that the MPNs are extremely sensitive to acidic environments [ 41 ] and that the Fe(NO 3 ) 3 solution used here was pH 2.6, a PC-MPN I coating with a thickness of approximately 14 nm was separately immersed into dilute HCl at pH 2.6 and Fe(NO 3 ) 3 solutions for 5 min to separately reveal the roles of acidic environments and Fe 3+ in this decomposition process. UV–vis was recorded before and after immersion (Additional file 1 : Figure S6).…”

Reversible Adsorption and Detachment of Saccharomyces cerevisiae on Thermoresponsive Poly(N-isopropylacrylamide)-Grafted Fibers for Continuous Immobilized Fermentation

“…9 Surface modification was the key to changing the wettability of materials. 10 Smart materials, which showed stimuli-responsive changes in wettability, have been widely investigated due to their outstanding properties in biosensors, drug delivery systems, and modern medicine. After grafting with the related polymers, these materials could switch hydrophilicity and hydrophobicity by changing the temperature, 11 pH, 12 sugar, 13 light, 14 and so on.…”

“…In other words, the increment of surface hydrophobicity was especially necessary for the control of cell adhesion and biofilm formation . Surface modification was the key to changing the wettability of materials . Smart materials, which showed stimuli-responsive changes in wettability, have been widely investigated due to their outstanding properties in biosensors, drug delivery systems, and modern medicine.…”