1
|
Aguiar A, Marcelino LP, Mariquito A, Simões CL, Simoes R, Pinho I, Marques AC. Microcapsules of Poly(butylene adipate- co-terephthalate) (PBAT) Loaded with Aliphatic Isocyanates for Adhesive Applications. ACS APPLIED POLYMER MATERIALS 2024; 6:5618-5629. [PMID: 38807950 PMCID: PMC11129179 DOI: 10.1021/acsapm.4c00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 03/23/2024] [Accepted: 04/23/2024] [Indexed: 05/30/2024]
Abstract
This work introduces the encapsulation of hexamethylene diisocyanate derivatives (HDI, TriHDI, and PHDI) with the biodegradable polymer poly(butylene adipate-co-terephthalate) (PBAT) through a solvent evaporation method. These microcapsules (MCs) were then employed in adhesive formulations for footwear. Moreover, MCs containing PHDI were produced in a closed vessel, demonstrating the potential for recovering and reusing organic solvents for the first time. The MCs were achieved with an isocyanate payload reaching up to 68 wt %, displaying a spherical shape, a core-shell structure, and thin walls without holes or cracks. The application of MCs as cross-linking agents for adhesives was evaluated following industry standards. The adhesives' strength surpassed the minimum requirement by a significant margin. Creep tests demonstrated that the formulation with MCs exhibits superior thermostability. Furthermore, the formulation with MCs-PHDI presented the best results reported to date for this type of system, as no displacement was observed in the bonded substrates. Environmental assessment indicates that adhesives with MCs have higher global warming potential (+16.2%) and energy consumption (+10.8%) than the standard commercial adhesives, but under alternative realistic scenarios, the differences can be insignificant. Therefore, adhesive formulations incorporating MCs promise to be on par with traditional adhesive systems regarding environmental impacts while providing benefits such as improved and safe handling of isocyanates and excellent bonding effectiveness.
Collapse
Affiliation(s)
- António Aguiar
- CERENA,
DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Lucas P. Marcelino
- CERENA,
DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - António Mariquito
- CERENA,
DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Carla L. Simões
- Polytechnic
Institute of Cavado and Ave (IPCA), 4750-810 Barcelos, Portugal
| | - Ricardo Simoes
- Polytechnic
Institute of Cavado and Ave (IPCA), 4750-810 Barcelos, Portugal
- Institute
for Polymers and Composites (IPC), University
of Minho, 4800-058 Guimarães, Portugal
| | - Isabel Pinho
- CIPADE, Av. Primeiro
de Maio 121, 3700-227 São João
da Madeira, Portugal
| | - Ana C. Marques
- CERENA,
DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| |
Collapse
|
2
|
Nguyen LMT, Nguyen NKH, Dang HH, Nguyen ADS, Truong TT, Nguyen HT, Nguyen TQ, Cu ST, Le NN, Doan TCD, Nguyen LTT. Synthesis and thermal-responsive behavior of a polysiloxane-based material by combined click chemistries. POLYMER 2023. [DOI: 10.1016/j.polymer.2023.125813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
|
3
|
Aguiar A, Mariquito A, Gonçalves D, Pinho I, Marques AC. Biodegradable Microcapsules of Poly(Butylene Adipate- co-Terephthalate) (PBAT) as Isocyanate Carriers and the Effect of the Process Parameters. Polymers (Basel) 2023; 15:polym15030665. [PMID: 36771965 PMCID: PMC9921966 DOI: 10.3390/polym15030665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 01/24/2023] [Accepted: 01/26/2023] [Indexed: 01/31/2023] Open
Abstract
Poly(butylene adipate-co-terephthalate) (PBAT), a biodegradable flexible, and tough polymer is herein used, for the first time, to encapsulate and protect isocyanate derivatives. Isocyanates are essential building blocks widely employed in the chemical industry for the production of high-performing materials. Microencapsulation of isocyanates eliminates the risks associated with their direct handling and protects them from moisture. In light of this, and having in mind eco-innovative products and sustainability, we present a straightforward process to encapsulate isophorone diisocyanate (IPDI) using this biodegradable polymer. Spherical and core-shell microcapsules (MCs) were produced by an emulsion system combined with the solvent evaporation method. The MCs present a regular surface, without holes or cracks, with a thin shell and high isocyanate loadings, up to 79 wt%. Additionally, the MCs showed very good isocyanate protection if not dispersed in organic or aqueous solutions. Effects of various process parameters were systematically studied, showing that a higher stirring speed (1000 rpm) and emulsifier amount (2.5 g), as well as a smaller PBAT amount (1.60 g), lead to smaller MCs and narrower size distribution.
Collapse
Affiliation(s)
- António Aguiar
- CERENA, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
- CIPADE—Indústria e Investigação de Produtos Adesivos, SA., Av. Primeiro de Maio 121, 3700-227 São João da Madeira, Portugal
- Correspondence: (A.A.); (A.C.M.)
| | - António Mariquito
- CERENA, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Diogo Gonçalves
- CERENA, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
| | - Isabel Pinho
- CIPADE—Indústria e Investigação de Produtos Adesivos, SA., Av. Primeiro de Maio 121, 3700-227 São João da Madeira, Portugal
| | - Ana C. Marques
- CERENA, DEQ, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal
- Correspondence: (A.A.); (A.C.M.)
| |
Collapse
|
4
|
Lak SN, Ahmed S, Shamberger PJ, Pentzer EB. Encapsulation of hygroscopic liquids via polymer precipitation in non-aqueous emulsions. J Colloid Interface Sci 2022; 628:605-613. [PMID: 36027771 DOI: 10.1016/j.jcis.2022.08.083] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 08/11/2022] [Accepted: 08/12/2022] [Indexed: 10/15/2022]
Abstract
HYPOTHESIS Encapsulation of ionic liquids (ILs) and phase change materials (PCMs) can overcome limitations associated with bulk materials, e.g., slow mass transfer rates, high viscosities, or susceptibility to external environment. Single step soft-templated encapsulation methods commonly use interfacial polymerization for shell formation, with a multifunctional monomer in the continuous phase and another in the discontinuous phase, and thus do not give pristine core material. We posit that polymer precipitation onto emulsion droplets in non-aqueous emulsions could produce a robust shell without contamination of the core, ideal for the encapsulation of water-sensitive or water-miscible materials. EXPERIMENTS Solutions of commodity polymers were added to the continuous phase of non-aqueous Pickering emulsions stabilized by alkylated graphene oxide (GO) nanosheets such that the change in solubility of the polymer led to formation of robust shells and the production of capsules that could be isolated. FINDINGS We demonstrate that a polymer precipitation approach can produce capsules with pristine core of the IL 1-ethyl-3-methylimidazolium hexafluorophosphate [Emim][PF6] or the salt hydrate PCM magnesium nitrate hexahydrate (MNH) and shell of nanosheets and polystyrene, poly(methyl methacrylate), or polyethylene. The capsules are approximately 80 wt% [Emim][PF6] or >90 wt% MNH, and the core can undergo multiple cycles of solidification and melting without leakage or destruction. This novel, single-step methodology provides a distinct advantage to access capsules with pristine core composition and is amenable to different core and shell, paving the way for tailoring capsule composition for desired applications.
Collapse
Affiliation(s)
- Sarah N Lak
- Department of Chemistry, Texas A&M University, College Station, TX 77843, United States
| | - Sophia Ahmed
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, United States
| | - Patrick J Shamberger
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, United States
| | - Emily B Pentzer
- Department of Chemistry, Texas A&M University, College Station, TX 77843, United States; Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, United States.
| |
Collapse
|
5
|
Abstract
In this study, we successfully manufactured polyurethane microcapsules containing isocyanate prepolymer as a core material for self-healing protection coatings via interfacial polymerization of a commercial polyurethane curing agent (Bayer L-75) and 1,4-butanediol (BDO) as a chain extender in an emulsion solution. With an optical microscope (OM) and a scanning electron microscope (SEM), the resulting microcapsules showed a spherical shape and an ideal structure with a smooth surface. Fourier transform infrared spectra (FTIR) showed that the core material was successfully encapsulated. Thermal gravimetric analysis (TGA) showed that the initial evaporation temperature of the microcapsules was 270 °C. In addition, we examined the influence of the concentration of the emulsifier and chain extender on the structure and morphology of the microcapsules. The results indicate that the optimal parameters of the microcapsule are an emulsifier concentration of 7.5% and a chain extender concentration of 15.38%. Microcapsules were added to the epoxy resin coating to verify the coating’s self-healing performance by a surface scratch test, and the results showed that the cracks could heal in 24 h. Furthermore, the self-healing coating had excellent corrosion resistance.
Collapse
|
6
|
Yan J, Mangolini F. Engineering encapsulated ionic liquids for next-generation applications. RSC Adv 2021; 11:36273-36288. [PMID: 35492767 PMCID: PMC9043619 DOI: 10.1039/d1ra05034f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 10/21/2021] [Indexed: 01/02/2023] Open
Abstract
Ionic liquids (ILs) have attracted considerable attention in several sectors (from energy storage to catalysis, from drug delivery to separation media) owing to their attractive properties, such as high thermal stability, wide electrochemical window, and high ionic conductivity. However, their high viscosity and surface tension compared to conventional organic solvents can lead to unfavorable transport properties. To circumvent undesired kinetics effects limiting mass transfer, the discretization of ILs into small droplets has been proposed as a method to increase the effective surface area and the rates of mass transfer. In the present review paper, we summarize the different methods developed so far for encapsulating ILs in organic or inorganic shells and highlight characteristic features of each approach, while outlining potential applications. The remarkable tunability of ILs, which derives from the high number of anions and cations currently available as well as their permutations, combines with the possibility of tailoring the composition, size, dispersity, and properties (e.g., mechanical, transport) of the shell to provide a toolbox for rationally designing encapsulated ILs for next-generation applications, including carbon capture, energy storage devices, waste handling, and microreactors. We conclude this review with an outlook on potential applications that could benefit from the possibility of encapsulating ILs in organic and inorganic shells. Encapsulated ionic liquids (ILs) are candidate materials for several applications owing to the attractive properties of ILs combined with the enhanced mass transfer rate obtained through the discretization of ILs in small capsules.![]()
Collapse
Affiliation(s)
- Jieming Yan
- Texas Materials Institute, The University of Texas at Austin Austin TX 78712 USA.,Materials Science and Engineering Program, The University of Texas at Austin Austin TX 78712 USA
| | - Filippo Mangolini
- Texas Materials Institute, The University of Texas at Austin Austin TX 78712 USA.,Walker Department of Mechanical Engineering, The University of Texas at Austin Austin TX 78712 USA
| |
Collapse
|
7
|
Risangud N, de Jongh PA, Wilson P, Haddleton DM. Synthesis of biodegradable liquid-core microcapsules composed of isocyanate functionalized poly(ε-caprolactone)-containing copolymers. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
8
|
Santos ANB, Santos DJD, Carastan DJ. Microencapsulation of reactive isocyanates for application in self-healing materials: a review. J Microencapsul 2021; 38:338-356. [PMID: 33938373 DOI: 10.1080/02652048.2021.1921068] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Microencapsulation of curing agents is a major strategy for the development of self-healing polymers. Isocyanates are among the most promising compounds for the development of one-part, catalyst free, self-healing materials, but their microencapsulation is challenging due to their high reactivity. To keep the healing agent intact in the liquid state and containing free-NCO groups, the monitoring of several synthesis parameters is essential. This review aims to summarise the outcomes in the microencapsulation of isocyanates, emphasising the efforts reported in the literature to modulate the microcapsule properties. In this regard, the main synthesis procedures are presented, followed by the most relevant characterisation methods used to assess microcapsule properties. The correlation between these properties and synthesis parameters is also discussed, and finally the main potential and challenges for industrial applications are highlighted.
Collapse
Affiliation(s)
- Amanda N B Santos
- Nanoscience and Advanced Materials Graduate Program (PPG-Nano), Federal University of ABC (UFABC), Santo André, Brazil
| | - Demetrio J Dos Santos
- Nanoscience and Advanced Materials Graduate Program (PPG-Nano), Federal University of ABC (UFABC), Santo André, Brazil.,Material Science and Engineering Graduate Program (PPG-CEM), Federal University of ABC (UFABC), Santo André, Brazil
| | - Danilo J Carastan
- Nanoscience and Advanced Materials Graduate Program (PPG-Nano), Federal University of ABC (UFABC), Santo André, Brazil.,Material Science and Engineering Graduate Program (PPG-CEM), Federal University of ABC (UFABC), Santo André, Brazil
| |
Collapse
|
9
|
Shan C, Ning C, Lou J, Xu W, Zhang Y. Design and preparation of UV-curable waterborne polyurethane based on novel fluorinated chain extender. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03202-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
10
|
Attaei M, Vale M, Shakoor A, Kahraman R, Montemor MF, Marques AC. Hybrid shell microcapsules containing isophorone diisocyanate with high thermal and chemical stability for autonomous self‐healing of epoxy coatings. J Appl Polym Sci 2019. [DOI: 10.1002/app.48751] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mahboobeh Attaei
- Centro de Química Estrutural‐CQE, DEQ, Instituto Superior TécnicoUniversidade de Lisboa, Avenue Rovisco Pais Lisbon 1049‐001 Portugal
| | - Mário Vale
- CERENA, DEQ, Instituto Superior TécnicoUniversidade de Lisboa, Avenida Rovisco Pais Lisbon 1049‐001 Portugal
| | | | | | - M. Fátima Montemor
- Centro de Química Estrutural‐CQE, DEQ, Instituto Superior TécnicoUniversidade de Lisboa, Avenue Rovisco Pais Lisbon 1049‐001 Portugal
| | - Ana C. Marques
- CERENA, DEQ, Instituto Superior TécnicoUniversidade de Lisboa, Avenida Rovisco Pais Lisbon 1049‐001 Portugal
| |
Collapse
|
11
|
Gobert SRL, Segers M, Luca S, Teixeira RFA, Kuhn S, Braeken L, Thomassen LCJ. Development of a continuous reactor for emulsion-based microencapsulation of hexyl acetate with a polyuria shell. J Microencapsul 2019; 36:371-384. [PMID: 31215280 DOI: 10.1080/02652048.2019.1633433] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Microencapsulation is almost exclusively performed in batch processes. With today's chemistry increasingly performed in flow reactors, this work aims to realise a continuous reactor setup for the encapsulation of an ester with a polyuria (PU) shell. The generation of an emulsion template is performed in a recirculation loop driven by a pump and equipped with static mixers, screen type and Kenics®. Calorimetric measurements are performed to characterise the energy dissipation rate inside the loop. The curing step is performed in a coiled tube reactor with two geometric configurations. Number based capsule size distributions are derived from micrograph analysis. Results indicate that the recycle pump is the main contributor to determine the capsule size distribution. A continuous setup is achieved for PU microcapsules containing hexyl acetate with a production rate of 198 g/h dry capsules, and a mean capsule diameter of 13.3 µm with a core content of 54 wt%.
Collapse
Affiliation(s)
- Sven R L Gobert
- a Faculty of Industrial Engineering , KU Leuven , Diepenbeek , Belgium
| | - Marleen Segers
- a Faculty of Industrial Engineering , KU Leuven , Diepenbeek , Belgium
| | - Stijn Luca
- b Department of Data Analysis and Mathematical Modelling , Ghent University , Ghent , Belgium
| | | | - Simon Kuhn
- d Department of Chemical Engineering , KU Leuven , Leuven , Belgium
| | - Leen Braeken
- a Faculty of Industrial Engineering , KU Leuven , Diepenbeek , Belgium.,d Department of Chemical Engineering , KU Leuven , Leuven , Belgium
| | - Leen C J Thomassen
- a Faculty of Industrial Engineering , KU Leuven , Diepenbeek , Belgium.,d Department of Chemical Engineering , KU Leuven , Leuven , Belgium
| |
Collapse
|
12
|
Lu W, Meng Q, Qin C, Li J, Qi G, Kong B, He Z. Facile and efficient isocyanate microencapsulation via SDBS/PVP synergetic emulsion. J Appl Polym Sci 2019. [DOI: 10.1002/app.48045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wei Lu
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- National Demonstration Center for Experimental Mining Engineering EducationShandong University of Science and Technology Qingdao 266590 China
| | - Qingwei Meng
- State Key Laboratory of Catalysis, Dalian Institute of Chemical PhysicsChinese Academy of Sciences Dalian 116023 China
| | - Chuanrui Qin
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
| | - Jinliang Li
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
| | - Guansheng Qi
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- National Demonstration Center for Experimental Mining Engineering EducationShandong University of Science and Technology Qingdao 266590 China
| | - Biao Kong
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- National Demonstration Center for Experimental Mining Engineering EducationShandong University of Science and Technology Qingdao 266590 China
| | - Zhenglong He
- State Key Laboratory of Mining Disaster Prevention and Control Co‐founded by Shandong Province and Ministry of Science and TechnologyShandong University of Science and Technology Qingdao 266590 China
- College of Mining and Safety EngineeringShandong University of Science and Technology Qingdao 266590 China
- National Demonstration Center for Experimental Mining Engineering EducationShandong University of Science and Technology Qingdao 266590 China
| |
Collapse
|
13
|
Li Z, Yang W, Yu Q, Wu Y, Wang D, Liang J, Zhou F. New Method for the Corrosion Resistance of AZ31 Mg Alloy with a Porous Micro-Arc Oxidation Membrane as an Ionic Corrosion Inhibitor Container. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:1134-1145. [PMID: 30086637 DOI: 10.1021/acs.langmuir.8b01637] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This work introduces a new composite anticorrosion coating for the AZ31 magnesium alloy, based on the synergistic effect of an organic/inorganic composite coating with a micro- and nanoporous micro-arc oxidation (MAO) membrane as the container of ionic corrosion inhibitor (M-16). The surface morphologies and size of the micro/nanocontainers in the porous MAO membrane before and after filling with M-16 corrosion inhibitor are examined by scanning electron microscopy (SEM). The effectiveness of M-16 for corrosion suppression on AZ31 Mg alloy with and without epoxy coating as the top sealing layer is demonstrated by electrochemical impedance spectroscopy (EIS) and salt spray tests. The potentiodynamic polarization and electrochemical impedance spectroscopy measurements show that, compared with the bare AZ31 Mg alloys, the composite coating has superior corrosion resistance with the a lower corrosion current (9.7 × 10-9 A/cm2) and a higher protection efficiency (99.3%) after immersion in 3.5 wt % NaCl solution and, meanwhile, has stronger salt spray resistance within 30 days. The results demonstrate the synergistic effect of the isolation protection of the micro-arc oxidation layer and the inhibition of M-16 and that the epoxy coating contributed to the protection for AZ31 Mg substrate to some extent. Therefore, it is anticipated that the composite coating has a potential application in the protection of metals and their alloys.
Collapse
Affiliation(s)
- Zhaoxia Li
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Wenbin Yang
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Qiangliang Yu
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Yang Wu
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Daoai Wang
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
- Qingdao Center of Resource Chemistry and New Materials , Qingdao 266100 , China
| | - Jun Liang
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
| |
Collapse
|
14
|
Budd M, Stephens R, Afsar A, Salimi S, Hayes W. Exploiting thermally-reversible covalent bonds for the controlled release of microencapsulated isocyanate crosslinkers. REACT FUNCT POLYM 2019. [DOI: 10.1016/j.reactfunctpolym.2018.12.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
15
|
Jiang X, Bashir MS, Zhang F, Kong XZ. Formation and shape transition of porous polyurea of exotic forms through interfacial polymerization of toluene diisocyanate in aqueous solution of ethylenediamine and their characterization. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.09.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
16
|
Isophorone Diisocyanate (IPDI) Microencapsulation for Mono-Component Adhesives: Effect of the Active H and NCO Sources. Polymers (Basel) 2018; 10:polym10080825. [PMID: 30960750 PMCID: PMC6403942 DOI: 10.3390/polym10080825] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 07/12/2018] [Accepted: 07/22/2018] [Indexed: 11/17/2022] Open
Abstract
Polyurea/polyurethane (PUa/PU) shell microcapsules (MCs), containing high loadings of isophorone diisocyanate (IPDI) in the core, were developed to enable the production of mono-component, eco-friendly and safer adhesive formulations for the footwear industry. IPDI microencapsulation was obtained via oil⁻in⁻water (O/W) microemulsion combined with interfacial polymerization. A methylene diphenyl diisocyanate (MDI) compound (a commercial blend of monomeric and polymeric species), with higher reactivity than IPDI and low viscosity, was added to the O phase to competitively contribute to the shell formation, improving its quality. Four different active H sources were tested, aimed at achieving a high encapsulation yield. The successful encapsulation of IPDI was confirmed by Fourier transformed infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), while the MCs' morphology and size distribution were assessed by scanning electron microscopy (SEM). The incorporation of a multifunctional isocyanate silane in the O phase, as "latent" active H source, led to the formation of impermeable PUa/PU-silica hybrid shell MCs with more than 60 wt.% of pure encapsulated IPDI. A proof-of-concept study shows high peeling strength and a structural type of failure of the adhesive joint, revealing an effective IPDI release. These new engineered MCs are found to be promising crosslinkers for mono-component adhesives for high demanding applications.
Collapse
|
17
|
Guo M, Li W, Han N, Wang J, Su J, Li J, Zhang X. Novel Dual-Component Microencapsulated Hydrophobic Amine and Microencapsulated Isocyanate Used for Self-Healing Anti-Corrosion Coating. Polymers (Basel) 2018; 10:E319. [PMID: 30966353 PMCID: PMC6415046 DOI: 10.3390/polym10030319] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/09/2018] [Accepted: 03/12/2018] [Indexed: 11/17/2022] Open
Abstract
Dual component microencapsulated hydrophobic amine and microencapsulated isocyanate were designed and fabricated for self-healing anti-corrosion coating. In this system, novel hydrophobic polyaspartic acid ester (PAE) and isophorone diisocyanate (IPDI) were microencapsulated respectively with melamine-formaldehyde (MF) as shell via in situ polymerization. To reduce the reaction activity between shell-forming MF prepolymer and PAE, another self-healing agent tung oil (TO) was dissolved in PAE and subsequently employed as core material. With field-emission scanning electron microscopy (FE-SEM) and optical microscopy (OM), the resultant microencapsulated IPDI with diameter of 2⁻5 μm showed a spherical shape and smooth surface. More importantly, both the morphology and microstructure of microencapsulated PAE enhanced significantly after addition of TO. Fourier transform infrared spectra (FTIR) analysis confirmed the molecular structure of chemical structure of the microcapsules. Thermal gravimetric analysis (TGA) indicated that both kinds of microcapsules exhibit excellent thermal resistance with the protection of MF shell. Furthermore, the self-healing epoxy coating system containing microencapsulated IPDI and microencapsulated PAE/TO was prepared and investigated. From the micrographs of true color confocal microscope (TCCM), the self-healing coating containing dual-component microcapsules showed excellent self-repairing performance compared to single microencapsulated IPDI system, and the optimal content of dual-component microcapsules in epoxy coating was 20 wt % approximately.
Collapse
Affiliation(s)
- Maolian Guo
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Wei Li
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
- Tianjin Colouroad Coatings & Chemicals Co., Ltd., Tianjin 300457, China.
| | - Na Han
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Jianping Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Junfeng Su
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
| | - Jianjie Li
- Tianjin Colouroad Coatings & Chemicals Co., Ltd., Tianjin 300457, China.
| | - Xingxiang Zhang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Key Laboratory of Advanced Fibers and Energy Storage, School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China.
| |
Collapse
|
18
|
Nguon O, Lagugné-Labarthet F, Brandys FA, Li J, Gillies ER. Microencapsulation by in situ Polymerization of Amino Resins. POLYM REV 2017. [DOI: 10.1080/15583724.2017.1364765] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Olivier Nguon
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada
- 3M Canada Company, London, Ontario, Canada
| | | | | | - Jian Li
- 3M Canada Company, London, Ontario, Canada
| | - Elizabeth R. Gillies
- Department of Chemistry, The University of Western Ontario, London, Ontario, Canada
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, London, Ontario, Canada
| |
Collapse
|
19
|
Ma Y, Jiang Y, Tan H, Zhang Y, Gu J. A Rapid and Efficient Route to Preparation of Isocyanate Microcapsules. Polymers (Basel) 2017; 9:polym9070274. [PMID: 30970952 PMCID: PMC6432291 DOI: 10.3390/polym9070274] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 07/01/2017] [Accepted: 07/06/2017] [Indexed: 12/20/2022] Open
Abstract
In this paper, polyaryl polymethylene isocyanates (PAPI) were used as an innovative alternative material to prepare isocyanate microcapsules. PAPI could be used as core materials, which would react with small molecules containing active hydrogen (1,4-butanediol, ethylene glycol, 1,2-diaminoethane etc.). The reaction products of PAPI and active hydrogen would form a shell by interfacial polymerization reaction in an oil-in-water emulsion. Smooth spherical microcapsules of 70 ~ 180 μm in diameter were produced by controlling agitation rate (600 ~ 1200 rpm). High yields (~80%) of a free-flowing powder of PAPI/polyurethane and polyurea capsules were produced with a high isocyanate groups (–NCO) content of 23 wt % as determined by titration analysis. Structural analysis and quality assessments of each batch of microcapsules were performed by using thermogravimetric analysis, Fourier transform infrared spectroscopy and scanning electron microscopy. Preliminary results indicated the microcapsules were stable with only about 20% loss of –NCO detected after one month storage under ambient conditions. This work showed the great potential of novel microencapsulation technique in development of protection of –NCO and in aspects of micro- and nano-structure construction materials.
Collapse
Affiliation(s)
- Yangbao Ma
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| | - Yang Jiang
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| | - Haiyan Tan
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| | - Yanhua Zhang
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| | - Jiyou Gu
- Material Science and Engineering College, Northeast Forestry University, Harbin 150040, China.
| |
Collapse
|
20
|
Hu J, Chen Z, He Y, Huang H, Zhang X. Synthesis and structure investigation of hexamethylene diisocyanate (HDI)-based polyisocyanates. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-016-2795-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
21
|
|
22
|
Li S, Kong X, Feng S. Preparation of uniform poly(urea–siloxane) microspheres through precipitation polymerization. RSC Adv 2015. [DOI: 10.1039/c5ra18140b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Preparation of PUSs through precipitation polymerization.
Collapse
Affiliation(s)
- Shusheng Li
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
| | - Xiangzheng Kong
- College of Chemistry and Chemical Engineering
- University of Jinan
- Jinan
- P. R. China
| | - Shengyu Feng
- Key Laboratory of Special Functional Aggregated Materials & Key Laboratory of Colloid and Interface Chemistry (Shandong University)
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
| |
Collapse
|