|
1
|
Verma C, Dubey S, Bose R, Alfantazi A, Ebenso EE, Rhee KY. Zwitterions and betaines as highly soluble materials for sustainable corrosion protection: Interfacial chemistry and bonding with metal surfaces. Adv Colloid Interface Sci 2024; 324:103091. [PMID: 38281394 DOI: 10.1016/j.cis.2024.103091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 01/04/2024] [Accepted: 01/21/2024] [Indexed: 01/30/2024]
Abstract
The primary requirements for interfacial adsorption and corrosion inhibition are solubility and the existence of polar functional groups, particularly charges. Traditional organic inhibitors have a solubility issue due to the hydrophobic moieties they incorporate. Most documented organic inhibitors have aromatic rings, hydrocarbon chains, and a few functional groups. The excellent solubility and high efficacy of zwitterions and betaines make them the perfect replacements for insoluble corrosion inhibitors. Zwitterions and betaines are more easily soluble because of interactions between their positive and negative charges (-COO-, -PO3-, -NH3, -NHR2, -NH2R, -SO3- etc.) and the polar solvents. The positive and negative charges also aid these molecules' physical and chemical adsorption at the metal-electrolyte interfaces. They develop a corrosion-inhibiting layer through their adsorption. After becoming adsorbed at the metal-electrolyte interface, they act as mixed-type inhibitors, slowing both cathodic and anodic processes. They usually adsorb according to the Langmuir adsorption isotherm. In this article, the corrosion inhibition potential of zwitterions and betaines in the aqueous phase, as well as their mode of action, are reviewed. This article details the advantages and disadvantages of utilizing zwitterions and betaines for sustainable corrosion protection.
Collapse
Affiliation(s)
- Chandrabhan Verma
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates.
| | - Shikha Dubey
- Department of Chemistry, School of Sciences, Hemvati Nandan Bahuguna Garhwal University, Srinagar 246174, Garhwal, India
| | - Ranjith Bose
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Akram Alfantazi
- Department of Chemical Engineering, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Eno E Ebenso
- Institute for Nanotechnology and Water Sustainability, College of Science, Engineering and Technology, University of South Africa, Johannesburg 1710, South Africa
| | - Kyong Yop Rhee
- Department of Mechanical Engineering, College of Engineering, Kyung Hee University, Yongin 445-701, South Korea.
| |
Collapse
|
|
2
|
Chen J, Li S, Wang X, Fang L, Huang D, Ke L, Chen J, Wang Q, Zhang H, Wu Y, Zhu D, Li C, Hao X. Synthesis and Characterization of Pressure-Sensitive Adhesives Based on a Naphthyl Curing Agent. Polymers (Basel) 2023; 15:4516. [PMID: 38231956 PMCID: PMC10707846 DOI: 10.3390/polym15234516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/15/2023] [Accepted: 11/18/2023] [Indexed: 01/19/2024] Open
Abstract
The incorporation of a naphthyl curing agent (NCA) can enhance the thermal stability of pressure-sensitive adhesives (PSAs). In this study, a PSA matrix was synthesized using a solution polymerization process and consisted of butyl acrylate, acrylic acid, and an ethyl acrylate within an acrylic copolymer. Benzoyl peroxide was used as an initiator during the synthesis. To facilitate the UV curing of the solvent-borne PSAs, glycidyl methacrylate was added to introduce unsaturated carbon double bonds. The resulting UV-curable acrylic PSA tapes exhibited longer holding times at high temperatures (150 °C) compared to uncross-linked PSA tapes, without leaving any residues on the substrate surface. The thermal stability of the PSA was further enhanced by adding more NCA and increasing the UV dosage. This may be attributed to the formation of cross-linking networks within the polymer matrix at higher doses. The researchers successfully balanced the adhesion performance and thermal stability by modifying the amount of NCA and UV radiation, despite the peel strength declining and the holding duration shortening. This research also investigated the effects of cross-linking density on gel content, molecular weight, glass transition temperature, and other properties of the PSAs.
Collapse
Affiliation(s)
- Junhua Chen
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Shiting Li
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
| | - Xuan Wang
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
| | - Lili Fang
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
| | - Dingding Huang
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
| | - Lin Ke
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
| | - Jinlian Chen
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
| | - Qingwei Wang
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
| | - He Zhang
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Yinping Wu
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Dongyu Zhu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
| | - Chunsheng Li
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| | - Xiangying Hao
- School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China; (J.C.); (S.L.); (X.W.); (L.F.); (D.H.); (L.K.); (J.C.); (Q.W.); (H.Z.); (Y.W.)
- Guangdong Provincial Key Laboratory of Environmental Health and Land Resource, College of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing 526061, China
| |
Collapse
|
|
3
|
Haktaniyan M, Sharma R, Bradley M. Size-Controlled Ammonium-Based Homopolymers as Broad-Spectrum Antibacterials. Antibiotics (Basel) 2023; 12:1320. [PMID: 37627740 PMCID: PMC10452032 DOI: 10.3390/antibiotics12081320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/08/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023] Open
Abstract
Ammonium group containing polymers possess inherent antimicrobial properties, effectively eliminating or preventing infections caused by harmful microorganisms. Here, homopolymers based on monomers containing ammonium groups were synthesized via Reversible Addition Fragmentation Chain Transfer Polymerization (RAFT) and evaluated as potential antibacterial agents. The antimicrobial activity was evaluated against Gram-positive (M. luteus and B. subtilis) and Gram-negative bacteria (E. coli and S. typhimurium). Three polymers, poly(diallyl dimethyl ammonium chloride), poly([2-(methacryloyloxy)ethyl]trimethylammonium chloride), and poly(vinyl benzyl trimethylammonium chloride), were examined to explore the effect of molecular weight (10 kDa, 20 kDa, and 40 kDa) on their antimicrobial activity and toxicity to mammalian cells. The mechanisms of action of the polymers were investigated with dye-based assays, while Scanning Electron Microscopy (SEM) showed collapsed and fused bacterial morphologies due to the interactions between the polymers and components of the bacterial cell envelope, with some polymers proving to be bactericidal and others bacteriostatic, while being non-hemolytic. Among all the homopolymers, the most active, non-Gram-specific polymer was poly([2-(methacryloyloxy)ethyl]trimethylammonium chloride), with a molecular weight of 40 kDa, with minimum inhibitory concentrations between 16 and 64 µg/mL, showing a bactericidal mode of action mediated by disruption of the cytoplasmic membrane. This homopolymer could be useful in biomedical applications such as surface dressings and in areas such as eye infections.
Collapse
Affiliation(s)
- Meltem Haktaniyan
- EaStCHEM, School of Chemistry, University of Edinburgh, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK; (M.H.); (R.S.)
| | - Richa Sharma
- EaStCHEM, School of Chemistry, University of Edinburgh, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK; (M.H.); (R.S.)
| | - Mark Bradley
- EaStCHEM, School of Chemistry, University of Edinburgh, Joseph Black Building, West Mains Road, Edinburgh EH9 3FJ, UK; (M.H.); (R.S.)
- Precision Healthcare University Research Institute, Queen Mary University of London, Whitechapel, Empire House, London E1 1HH, UK
| |
Collapse
|