Optimization of intrinsic self-healing silicone coatings by benzotriazole loaded mesoporous silica

Chen, Guangmeng; Wen, Shifeng; Ma, Jiacheng; Sun, Zhiyong; Yue, Zhufeng; Mol, J.M.C.; Liu, Ming

doi:10.1016/j.surfcoat.2021.127388

Cited by 29 publications

(24 citation statements)

References 63 publications

(77 reference statements)

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“…The self-healing efficiency of sample A was only 58.6%. 30 The material without thiourea (B1) turns out no self-healing process as we previous studied. 30 When the ratio of HMDI to TCDI is 6:1 (B2), it exhibits a negligible selfhealing process; the healing efficiency is only 5.6% after 24 h. The poor self-healing properties can be ascribed to the inert dynamic process of H-bonds at room temperature, which can be activated by heating 1,28 or assistance of trance organic solvent.…”

Section: Resultsmentioning

confidence: 94%

“…30 The material without thiourea (B1) turns out no self-healing process as we previous studied. 30 When the ratio of HMDI to TCDI is 6:1 (B2), it exhibits a negligible selfhealing process; the healing efficiency is only 5.6% after 24 h. The poor self-healing properties can be ascribed to the inert dynamic process of H-bonds at room temperature, which can be activated by heating 1,28 or assistance of trance organic solvent. 20 Further increase of thiourea content to 3:1 (B3) demonstrated an enhanced healing efficiency to 56.2% after 24 h. When the thiourea content increased to 1:1, the material shows a fast self-healing process; the healing efficiency reaches 100% after 10 min.…”

Section: Resultsmentioning

confidence: 94%

“…It takes 72 h for complete healing of sample A. 30 For Bx (x = 1, 2, 3, and 4), the healing of surface scratch was not completed until 240 h, but B4 achieved the self-healing process within 3 h, as shown in Figures 5a 2 and S7. The failed self-healing of surface scratch for samples B1, B2, and B3 can be ascribed to the inhibited polymer chain penetration diffusion at the interface, which will be discussed in section 3.5.…”

Section: Resultsmentioning

confidence: 97%

“…The mechanical properties were studied by uniaxial tensile testing at a loading speed of 50 mm/min, and the results are shown in Figure 4. Sample A was studied in the previous work, 30 and the fracture strength was tested to be 1.5 MPa and the elongation at break was 843%. For B1 shown in Figure 4a, a clear yielding process was found, followed by a process similar to cold drawing, yielding the entire gauge section.…”

Section: Resultsmentioning

confidence: 99%

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Design of Robust Self-Healing Silicone Elastomers Based on Multiple H-Bonding and Dynamic Covalent Bond

2022

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A room-temperature self-healing silicone elastomer was prepared based on the synergistic effect of multiple H-bonding and dynamic covalent bond. The multiple bonds constructed by inserting thiourea into the polyurea network can inhibit the crystallization of hard urea H-bonds segments and activate the diffusion movement of polymer chains. Dynamic imine endows materials with a strong connection for the fracture interface by imine metathesis. The effect of thiourea on urea H-bonds was confirmed by the Fourier transform infrared spectrum, which showed obvious changes of H-bond density according to peak revolution of CO and N–H. Differential scanning calorimetry demonstrated the transition from the crystalline to amorphous state after the introduction of thiourea. Tensile tests and scratch-healing tests showed that this design method can improve the self-healing property without sacrificing the mechanical strength. Finally, the optimized self-healing process was analyzed from the perspectives of the contact process, the interpenetration diffusion of the polymer chain, and rebuilding of crosslinking points between the two interfaces, which would build an avenue for constructing a fast, self-healing, and tough material.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

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Design of Robust Self-Healing Silicone Elastomers Based on Multiple H-Bonding and Dynamic Covalent Bond

2022

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“…The study [11] proves that the introduction of nanosilicon (SiO 2 ) containing benzotriazole into polydimethylsiloxane makes it possible to obtain a self-healing coating. These coatings demonstrate increased protection of carbon steel from corrosion.…”

Section: Introductionmentioning

confidence: 77%

Optimization of the Composition of Silicone Enamel by the Taguchi Method Using Surfactants Obtained from Oil Refining Waste

et al. 2021

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The aim of this work is to optimize the composition of a two-component silicone enamel consisting of an aluminum pigment and a polyphenylsiloxane polymer to obtain the maximum dispersion of the pigment in the coating. The following products were used as surfactants: AS-1, PEPA, and Telaz. To assess the effect of surfactants on the dispersion of the pigment, computer-optical microscopy was used. The results of the studies showed that all the studied surfactants cause an improvement in the dispersion of the pigment. According to the degree of influence on the dispersion of the pigment, surfactants can be arranged in a row: PEPA > Telaz > AS-1. When the PEPA content in the enamel is 0.25 g/dm3, a decrease in the diameter of the pigment particles by 46% (from 26 to 14 microns) is recorded, with an increase in their specific amount by 2 times (from 258 to 550 pcs). Optimal enamel compositions allow a reduction in the corrosion rate by 11 times (from 0.6 to 0.053 mm/year) and improvement to the decorative properties of coatings (roughness, gloss, etc.). The effectiveness of the AS-1 product (obtained from oil refining waste) as a dispersant additive in silicone enamel has been proven.

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Self‐Assembled Multilayered Coatings with Multiple Cyclic Self‐Healing Capability, Bacteria Killing, Osteogenesis, and Angiogenesis Properties on Magnesium Alloys

Zhao,

He,

Yao

et al. 2023

Adv Healthcare Materials

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Self‐healing coatings improve the durability of magnesium (Mg) implants, but rapid corrosion still poses a challenge in the healing stage. Moreover, Mg‐based materials with acceptable bacteria killing, osteogenic and angiogenic properties are challenging in biomedical applications. Herein, the self‐healing polymeric coatings are fabricated on Mg alloys using the spin‐assisted layer‐by‐layer (SLbL) assembly of hyaluronic acid (HA) and branched polyethyleneimine (bPEI) followed by chemical crosslinking treatment. The self‐healing coatings show excellent adhesion strength and structure stability. The corrosion resistance is improved due to the physical barrier of polymer coatings, which also promotes the formation of hydroxyapatite (HAp) during degradation for further protection of Mg substrate. Owing to the dynamic reversible hydrogen bonds existing between HA and bPEI, the crosslinked multilayered coatings possess fast, substantial, and cyclic self‐healing capabilities leading to restoration of the original structure and functions. In vitro investigations reveal that the self‐healing coatings have multiple functionalities pertaining to bacteria killing, cytocompatibility, osteogenesis, as well as angiogenesis. In addition, the self‐healing coatings stimulate alkaline phosphatase activity (ALP), extracellular matrix (ECM) mineralization, and the expression of osteogenesis‐related genes of mBMSCs and HUVECs. This study reveals a feasible strategy to design and prepare versatile self‐healing coatings on Mg implants for biomedical applications.

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Optimization of intrinsic self-healing silicone coatings by benzotriazole loaded mesoporous silica

Cited by 29 publications

References 63 publications

Design of Robust Self-Healing Silicone Elastomers Based on Multiple H-Bonding and Dynamic Covalent Bond

Design of Robust Self-Healing Silicone Elastomers Based on Multiple H-Bonding and Dynamic Covalent Bond

Optimization of the Composition of Silicone Enamel by the Taguchi Method Using Surfactants Obtained from Oil Refining Waste

Self‐Assembled Multilayered Coatings with Multiple Cyclic Self‐Healing Capability, Bacteria Killing, Osteogenesis, and Angiogenesis Properties on Magnesium Alloys

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