Epoxy coating with excellent anticorrosion and pH-responsive performances based on DEAEMA modified mesoporous silica nanomaterials

Wang, Jixing; Yang, Huan; Meng, Z.; Xie, Binqiang; Yu, Xia; Su, Gaoshen; Wang, Li

doi:10.1016/j.colsurfa.2021.127951

Cited by 20 publications

(10 citation statements)

References 46 publications

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“…This hydrophilic to more hydrophobic trend after drying from solutions of higher pH was observed for all mixture ratios of the d-HD coatings. The increase in the wettability of the hydrogel films is caused by the protonation of the tertiary amine moieties of DEAEMA in the mixtures at pH 4 and pH 7, since for DEAEMA, the pK a is ≈7.3 [ 22 , 34 , 35 ]. This allows the absorption of larger amounts of water, leading to smaller water contact angles [ 36 , 37 ].…”

Section: Resultsmentioning

confidence: 99%

“…Lesho et al, for example, described a swelling behavior with different pH values, due to the ratio of non-ionizable to ionizable groups of N,N-dimethylaminoethyl methacrylate (DMA) [ 19 ]. Another well-known pH-responsive monomer is the polybase-containing copolymer 2-(diethylamino)ethyl methacrylate (DEAEMA) with a pK a of 7.3 [ 20 , 21 , 22 ]. DEAEMA is a smart pH and thermo-responsive polymer with a unique performance upon pH changes.…”

Section: Introductionmentioning

confidence: 99%

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Study on the Interaction of Plasma-Polymerized Hydrogel Coatings with Aqueous Solutions of Different pH

Levien

Nasri

Weltmann

et al. 2023

Gels

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Amphiphilic hydrogels from mixtures of 2-hydroxyethyl methacrylate and 2-(diethylamino)ethyl methacrylate p(HEMA-co-DEAEMA) with specific pH sensitivity and hydrophilic/hydrophobic structures were designed and polymerized via plasma polymerization. The behavior of plasma-polymerized (pp) hydrogels containing different ratios of pH-sensitive DEAEMA segments was investigated concerning possible applications in bioanalytics. In this regard, the morphological changes, permeability, and stability of the hydrogels immersed in solutions of different pHs were studied. The physico-chemical properties of the pp hydrogel coatings were analyzed using X-ray photoelectron spectroscopy, surface free energy measurements, and atomic force microscopy. Wettability measurements showed an increased hydrophilicity of the pp hydrogels when stored in acidic buffers and a slightly hydrophobic behavior after immersion in alkaline solutions, indicating a pH-dependent behavior. Furthermore, the pp (p(HEMA-co-DEAEMA) (ppHD) hydrogels were deposited on gold electrodes and studied electrochemically to investigate the pH sensitivity of the hydrogels. The hydrogel coatings with a higher ratio of DEAEMA segments showed excellent pH responsiveness at the studied pHs (pH 4, 7, and 10), demonstrating the importance of the DEAEMA ratio in the functionality of pp hydrogel films. Due to their stability and pH-responsive properties, pp (p(HEMA-co-DEAEMA) hydrogels are conceivable candidates for functional and immobilization layers for biosensors.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on the Interaction of Plasma-Polymerized Hydrogel Coatings with Aqueous Solutions of Different pH

Levien

Nasri

Weltmann

et al. 2023

Gels

View full text Add to dashboard Cite

show abstract

“…3.5 wt.% NaCl solution was selected as electrolyte for electrochemical impedance spectroscopy (EIS) test. The test parameters of EIS were described in 33 . At the same time, the self‐healing behavior of the coating with cross scratches was evaluated by neutral salt spray experiment in a salt spray box, according to ASTM‐B117.…”

Section: Methodsmentioning

confidence: 99%

“…The test parameters of EIS were described in. 33 At the same time, the selfhealing behavior of the coating with cross scratches was evaluated by neutral salt spray experiment in a salt spray box, according to ASTM-B117.…”

Section: Characterizationmentioning

confidence: 99%

“…The higher the low-frequency modulus value of the coating, the better the corrosion resistance of the coating. 33,44 In the early stage of immersion, the phase angle of the defect free anticorrosion coating is 90 in a wide frequency range in the phase angle diagram. As corrosive media slowly diffuses into the coating, the frequency range of a 90 phase angle gradually decreases due to the capacitive characteristics of the coating.…”

Section: Self-healing Anticorrosion Performancementioning

confidence: 99%

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A room‐temperature self‐healing anticorrosion coating of supramolecular polyurethane based on dynamic reversible quadruple hydrogen bond

Yang,

Wang,

et al. 2024

J of Applied Polymer Sci

Self Cite

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The contradiction between the migration rate of molecular chains and mechanical strength has always been a key factor affecting the practical application of self‐healing anticorrosion coatings. In this paper, a series of supramolecular self‐healing elastomers (SPU‐MP) were prepared by the reaction of diphenylmethane diisocyanate and polyether amine. The results shown that the proportion of polyetheramine D230 (D230) in molecular segments affects the hydrogen bond density between molecular chains, thereby affecting the self‐healing efficiency and mechanical strength of SPU‐MP. When the ratio of D230 and polyetheramine D400 (D400) is 2:8, the tensile fracture strength of SPU‐MP8 is 5.08 MPa, and the self‐healing efficiency reaches 82.1% after 10 h of repair at room temperature. Further increasing the ratio of D230 increases the relaxation time of the molecular chain due to the increase in hydrogen bond density, resulting in a decrease in the self‐healing efficiency of SPU‐MP. The results of electrochemical experiments and neutral salt spray experiments indicate that the anticorrosion coating prepared by SPU‐MP8 exhibits good self‐healing performance. After immersing in 3.5 wt.% NaCl solution for 35 days, the low‐frequency impedance modulus of the intact coating and the scratch coating were both higher than 107 Ω cm2, still shown good anticorrosion ability.

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Role of Ordered Mesoporous Silica Loaded with Cerium and with an Amine‐Modified Surface as an Effective Binder and Nano‐container in Corrosion Resistant Hybrid Coating

et al. 2023

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Ordered mesoporous silica was synthesized through sol‐gel technique under hydrothermal conditions by using tetraethylorthosilicate. The template free material was obtained by calcination and the channels of ordered mesoporous silica (OMS) were successfully loaded with cerium (corrosion inhibitor). This cerium loaded material was modified with N1‐(3‐Trimethoxysilylpropyl)diethylenetriamine through grafting with surface hydroxyl group. Subsequently, the surface‐modified material was actively used as a curing agent, host for corrosion inhibitors and filler as well in epoxy‐based coatings for mild steel. The mesoporous silica material was characterized by using a combination of various analytic and spectroscopic techniques like FT‐IR, powder‐XRD, N2 sorption, solid state 29Si and 13C MAS NMR studies. The physicochemical, physicomechanical, and thermal properties of the hybrid film were analyzed through standard techniques like FT‐IR, TGA‐DTA, DMTA and FE‐SEM. The coated hybrid film on mild steel was tested for corrosion inhibition by using potentiodynamic polarization (PDP) and electrochemical impedance spectroscopy (EIS) studies. The aforementioned studies revealed the developed coating system exhibited promising corrosion protection performance which was evident from icorr (6.65 nA), Ecorr (−502.850 mV), impedance (1.2×106 Ω) and phase angle (>80°). The observed water contact angle (WCA)>90° suggesting the hydrophobic nature of the coated surface.

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Epoxy coating with excellent anticorrosion and pH-responsive performances based on DEAEMA modified mesoporous silica nanomaterials

Cited by 20 publications

References 46 publications

Study on the Interaction of Plasma-Polymerized Hydrogel Coatings with Aqueous Solutions of Different pH

Study on the Interaction of Plasma-Polymerized Hydrogel Coatings with Aqueous Solutions of Different pH

A room‐temperature self‐healing anticorrosion coating of supramolecular polyurethane based on dynamic reversible quadruple hydrogen bond

Role of Ordered Mesoporous Silica Loaded with Cerium and with an Amine‐Modified Surface as an Effective Binder and Nano‐container in Corrosion Resistant Hybrid Coating

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