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Wang S, Tang J, Xiang H, Wei C, Huang J, Chen Z, Hu K, Han C, Zhu S, Ding Y. Mechanism Insights in Anticorrosion Performance of Waterborne Epoxy Coatings Reinforced by PEI-Functionalized Boron Nitride Nanosheets. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:10980-10991. [PMID: 38739526 DOI: 10.1021/acs.langmuir.4c00346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Functionalized hexagonal boron nitride nanosheets (BNNSs) have arisen as compelling anticorrosive additives, yet the precise mechanism of their corrosion resistance enhancement in coatings remains unclear. Here, polyethylenimine functionalized BNNSs (PEI-BNNSs) with approximately 6-11 layers were prepared through a "one-step" method. Then, the PEI-BNNSs/Waterborne epoxy (WEP) composite coatings were incorporated via the waterborne latex blending method for the anticorrosion of the Q235 substrate. The impedance modulus (|Z|f = 0.01 Hz) of 0.5 wt % PEI-BNNSs/WEP composite coating soaked in 3.5 wt % NaCl solution for 35 days increased by 4 orders of magnitude compared to pure WEP coating, exhibiting exceptional long-term resistance against corrosion. The positron annihilation lifetime spectroscopy and corrosion product analysis demonstrated that the reinforced anticorrosion capabilities are not solely ascribed to the "tortuous path effect" arising from BNNSs impermeability. These mechanisms also encompass the reduction in free volume fraction and radius of the free volume cavities within the composite coating brought about by the PEI molecules. Additionally, the increase in coating adhesion, promoted by PEI, plays an important role in augmenting the barrier properties against corrosive agents. This study provided a full comprehension of the role played by functionalized BNNSs in fortifying the anticorrosion attributes of WEP coatings.
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Affiliation(s)
- Shufen Wang
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - Jiapeng Tang
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - Hailing Xiang
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - Chunxiang Wei
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - Junjun Huang
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - Zhenming Chen
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, College of Materials and Chemical Engineering, Hezhou University, Hezhou City 542899, P. R. China
| | - Kunhong Hu
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - Chengliang Han
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - SanE Zhu
- Advanced Functional Coating Additives R&D Center, School of Energy Materials and Chemical Engineering, Hefei University, Hefei 230000, Anhui, P. R. China
| | - Yunsheng Ding
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, Anhui, P. R. China
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Choudhary D, Singh A, Giri A, Prasad HC, Sharma RK, Mishra A, Singhai S, Singh A. Functional hBN decorated Ni(OH) 2 nanosheets synthesized for remarkable adsorption performance for the elimination of fluoride ions. Dalton Trans 2023; 52:13199-13215. [PMID: 37665003 DOI: 10.1039/d3dt01695a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/05/2023]
Abstract
Occurrence of fluoride in groundwater is a serious concern due to its fatal effects. Functionalized hexagonal boron nitride sheets have been combined with nickel hydroxide nanoparticles by a one step process and a hybrid adsorbent Ni(OH)2@hBN has been developed with an exceptionally high fluoride adsorption capacity of 365 mg g-1, higher than those of Ni(OH)2 and hBN. This maximum adsorption capacity is higher than those of most common adsorbents used for defluoridation including activated alumina, reported nickel oxide and carbon-based 2D material-supported alumina adsorbents. The presence of functionalized boron nitride significantly increased the surface area to 680 m2 g-1 with a pore volume of 0.33687 cm3 g-1 and provided rich hydroxyl group-containing surface sites for the removal of fluoride present in contaminated water. In addition, the adsorption of fluoride onto boron nitride-modified nickel hydroxide followed pseudo-second-order kinetics and the equilibrium data fitted well with the Langmuir adsorption isotherm, suggesting a monolayer adsorption mechanism. Furthermore, the material developed is tested with the water sample collected from a real affected area, from the Dhar district of India, and the material showed promising results in terms of fluoride removal efficacy.
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Affiliation(s)
- Diksha Choudhary
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
- Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India
| | - Ankit Singh
- Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India
| | - Abhishek Giri
- Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India
| | - Harish Chandra Prasad
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
- Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India
| | - R K Sharma
- Technical Physical Division, Bhabha Atomic Research Center Trombay, Mumbai, 400085, India
| | - Alka Mishra
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
- Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India
| | - Sandeep Singhai
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
- Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India
| | - Archana Singh
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
- Centre for Advanced Radiation Shielding and Geopolymeric Materials, CSIR-Advanced Materials and Processes Research Institute, Bhopal, 462026, India
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Llenas M, Cuenca L, Santos C, Bdikin I, Gonçalves G, Tobías-Rossell G. Sustainable Synthesis of Highly Biocompatible 2D Boron Nitride Nanosheets. Biomedicines 2022; 10:biomedicines10123238. [PMID: 36551994 PMCID: PMC9775030 DOI: 10.3390/biomedicines10123238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/15/2022] Open
Abstract
2D ultrafine nanomaterials today represent an emerging class of materials with very promising properties for a wide variety of applications. Biomedical fields have experienced important new achievements with technological breakthroughs obtained from 2D materials with singular properties. Boron nitride nanosheets are a novel 2D layered material comprised of a hexagonal boron nitride network (BN) with interesting intrinsic properties, including resistance to oxidation, extreme mechanical hardness, good thermal conductivity, photoluminescence, and chemical inertness. Here, we investigated different methodologies for the exfoliation of BN nanosheets (BNNs), using ball milling and ultrasound processing, the latter using both an ultrasound bath and tip sonication. The best results are obtained using tip sonication, which leads to the formation of few-layered nanosheets with a narrow size distribution. Importantly, it was observed that with the addition of pluronic acid F127 to the medium, there was a significant improvement in the BN nanosheets (BNNs) production yield. Moreover, the resultant BNNs present improved stability in an aqueous solution. Cytotoxicity studies performed with HeLa cells showed the importance of taking into account the possible interferences of the nanomaterial with the selected assay. The prepared BNNs coated with pluronic presented improved cytotoxicity at concentrations up to 200 μg mL-1 with more than 90% viability after 24 h of incubation. Confocal microscopy also showed high cell internalization of the nanomaterials and their preferential biodistribution in the cell cytoplasm.
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Affiliation(s)
- Marina Llenas
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Spain
| | - Lorenzo Cuenca
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Spain
| | - Carla Santos
- LAQV-REQUIMTE, Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal
- CQE—Centro de Química Estrutural, Instituto Superior Técnico, University of Lisbon, 1049-001 Lisbon, Portugal
| | - Igor Bdikin
- TEMA-Nanotechnology Research Group, Mechanical Engineering Department, University of Aveiro, 3810-193 Aveiro, Portugal
- Intelligent Systems Associate Laboratory (LASI), 3810-193 Aveiro, Portugal
| | - Gil Gonçalves
- TEMA-Nanotechnology Research Group, Mechanical Engineering Department, University of Aveiro, 3810-193 Aveiro, Portugal
- Intelligent Systems Associate Laboratory (LASI), 3810-193 Aveiro, Portugal
- Correspondence: (G.G.); (G.T.-R.)
| | - Gerard Tobías-Rossell
- Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de la UAB, 08193 Bellaterra, Spain
- Correspondence: (G.G.); (G.T.-R.)
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