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Aanniz T, El Omari N, Elouafy Y, Benali T, Zengin G, Khalid A, Abdalla AN, Sakran AM, Bouyahya A. Innovative Encapsulation Strategies for Food, Industrial, and Pharmaceutical Applications. Chem Biodivers 2024; 21:e202400116. [PMID: 38462536 DOI: 10.1002/cbdv.202400116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/07/2024] [Accepted: 03/10/2024] [Indexed: 03/12/2024]
Abstract
Bioactive metabolites obtained from fruits and vegetables as well as many drugs have various capacities to prevent or treat various ailments. Nevertheless, their efficiency, in vivo, encounter many challenges resulting in lower efficacy as well as different side effects when high doses are used resulting in many challenges for their application. Indeed, demand for effective treatments with no or less unfavorable side effects is rising. Delivering active molecules to a particular site of action within the human body is an example of targeted therapy which remains a challenging field. Developments of nanotechnology and polymer science have great promise for meeting the growing demands of efficient options. Encapsulation of active ingredients in nano-delivery systems has become as a vitally tool for protecting the integrity of critical biochemicals, improving their delivery, enabling their controlled release and maintaining their biological features. Here, we examine a wide range of nano-delivery techniques, such as niosomes, polymeric/solid lipid nanoparticles, nanostructured lipid carriers, and nano-emulsions. The advantages of encapsulation in targeted, synergistic, and supportive therapies are emphasized, along with current progress in its application. Additionally, a revised collection of studies was given, focusing on improving the effectiveness of anticancer medications and addressing the problem of antimicrobial resistance. To sum up, this paper conducted a thorough analysis to determine the efficacy of encapsulation technology in the field of drug discovery and development.
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Affiliation(s)
- Tarik Aanniz
- Biotechnology Laboratory (MedBiotech), Bioinova Research Center, Rabat Medical and Pharmacy School, Mohammed V University in Rabat, Rabat, 10100, Morocco
| | - Nasreddine El Omari
- High Institute of Nursing Professions and Health Techniques of Tetouan, Tetouan, Morocco
- Laboratory of Histology, Embryology, and Cytogenetic, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Rabat, 10100, Morocco
| | - Youssef Elouafy
- Laboratory of Materials, Nanotechnology and Environment LMNE, Faculty of Sciences, Mohammed V University in Rabat, Rabat BP, 1014, Morocco
| | - Taoufiq Benali
- Environment and Health Team, Polydisciplinary Faculty of Safi, Cadi Ayyad University, Marrakech, 46030, Morocco
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, 42130, Konya, Turkey
| | - Asaad Khalid
- Substance Abuse and Toxicology Research Center, Jazan University, P.O. Box: 114, Jazan, 45142, Saudi Arabia
- Medicinal and Aromatic Plants and Traditional Medicine Research Institute, National Center for Research, P. O. Box 2404, Khartoum, Sudan
| | - Ashraf N Abdalla
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah, 21955, Saudi Arabia
| | - Ashraf M Sakran
- Department of Anatomy, Faculty of Medicine, Umm Alqura University, Makkah, 21955, Saudi Arabia
| | - Abdelhakim Bouyahya
- Laboratory of Human Pathologies Biology, Department of Biology, Faculty of Sciences, Mohammed V University in Rabat, Rabat, 10106, Morocco
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Patil NG, Chaudhari SS, Mahanwar PA. Microencapsulation of polymeric phase change materials (MPCM) for thermal energy storage in industrial coating applications. JOURNAL OF POLYMER ENGINEERING 2023. [DOI: 10.1515/polyeng-2022-0291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Abstract
In recent years, energy has become an important factor in overall development. Most of the energy comes from fossil fuels which are nonrenewable and harmful to our environment. It has become important to develop new application technologies that utilize thermal energy storage (TES) technology. Energy storage technology based on PCMs is a cutting-edge research area with a wide range of potential applications. But the biggest problem of phase change material is its leakage problem, for that the researchers have set up a solution i.e., the microencapsulation techniques. This paper gives an overview of the synthesis of (MPCM) microencapsulated phase change material by using different methodologies and their applications in industrial coatings. Corrosion is the biggest problem in industrial coatings which reduces the working time span and overall performance of the coatings. The incorporation of the micro-PCMs in industrial coatings increases workability as well as the overall performance of the coatings. This review covers the use of MPCM in various industrial coating applications, challenges, and their future directions are also discussed.
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Affiliation(s)
- Niraj Govinda Patil
- Department of Polymer and Surface Engineering , Institute of Chemical Technology , Nathalal Parekh Marg, Matunga (E) , Mumbai 400019 , Maharashtra , India
| | - Soham Sharad Chaudhari
- Department of Polymer and Surface Engineering , Institute of Chemical Technology , Nathalal Parekh Marg, Matunga (E) , Mumbai 400019 , Maharashtra , India
| | - Prakash Anna Mahanwar
- Department of Polymer and Surface Engineering , Institute of Chemical Technology , Nathalal Parekh Marg, Matunga (E) , Mumbai 400019 , Maharashtra , India
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3
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Jariwala H, Santos RM, Lauzon JD, Dutta A, Wai Chiang Y. Controlled release fertilizers (CRFs) for climate-smart agriculture practices: a comprehensive review on release mechanism, materials, methods of preparation, and effect on environmental parameters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:53967-53995. [PMID: 35624378 DOI: 10.1007/s11356-022-20890-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 05/12/2022] [Indexed: 06/15/2023]
Abstract
Fertilizers play an essential role in increasing crop yield, maintaining soil fertility, and provide a steady supply of nutrients for plant requirements. The excessive use of conventional fertilizers can cause environmental problems associated with nutrient loss through volatilization in the atmosphere, leaching to groundwater, surface run-off, and denitrification. To mitigate environmental issues and improve the longevity of fertilizer in soil, controlled release fertilizers (CRFs) have been developed. The application of CRFs can reduce the loss of nutrients, provide higher nutrient use efficiency, and improve soil health simultaneously to achieve the goals of climate-smart agricultural (CSA) practices. The major findings of this review paper are (1) CRFs can prevent direct exposure of fertilizer granule to soil and prevent loss of nutrients such as nitrate and nitrous oxide emissions; (2) CRFs are less affected by the change in environmental parameters, and that can increase longevity in soil compared to conventional fertilizers; and (3) CRFs can maintain required soil nitrogen levels, increase water retention, reduce GHG emissions, lead to optimum pH for plant growth, and increase soil organic matter content. This paper could give good insights into the ongoing development and future perspectives of CRFs for CSA practices.
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Affiliation(s)
- Hiral Jariwala
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Rafael M Santos
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - John D Lauzon
- School of Environmental Science, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Animesh Dutta
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada
| | - Yi Wai Chiang
- School of Engineering, University of Guelph, 50 Stone Road East, Guelph, ON, N1G 2W1, Canada.
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4
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Ethylene Glycol Based Polyurethane Shell Microcapsules for Textile Applications Releasing Medicinal Lavender and Responding to Mechanical Stimuli. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Arzani FA, Dos Santos JHZ. Biocides and techniques for their encapsulation: a review. SOFT MATTER 2022; 18:5340-5358. [PMID: 35820409 DOI: 10.1039/d1sm01114f] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Biocides are compounds that are broadly used to protect products and equipment against microbiological damage. Encapsulation can effectively increase physicochemical stability and allow for controlled release of encapsulated biocides. We categorized microencapsulation into coacervation, sol-gel, and self-assembly methods. The former comprises internal phase separation, interfacial polymerization, and multiple emulsions, and the latter include polymersomes and layer-by-layer techniques. The focus of this review is the description of these categories based on their microencapsulation methods and mechanisms. We discuss the key features and potential applications of each method according to the characteristics of the biocide to be encapsulated, relating the solubility of biocides to the capsule-forming materials, the reactivity between them and the desired release rate. The role of encapsulation in the safety and toxicity of biocide applications is also discussed. Furthermore, future perspectives for biocide applications and encapsulation techniques are presented.
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Affiliation(s)
- Fernanda A Arzani
- Chemical Engineering Department, Universidade Federal do Rio Grande do Sul, Rua Eng. Luiz Englert s/n, Porto Alegre, 90040-040, Brazil.
| | - João H Z Dos Santos
- Institute of Chemistry, Universidade Federal do Rio Grande do Sul, Av. Bento Gonçalves, 9500, Porto Alegre, 91500-000, Brazil.
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6
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Pan P, Yan X, Wang L. Effects of Thermochromic Fluorane Microcapsules and Self-Repairing Waterborne Acrylic Microcapsules on the Properties of Water-Based Coatings on Basswood Surface. Polymers (Basel) 2022; 14:polym14122500. [PMID: 35746076 PMCID: PMC9229320 DOI: 10.3390/polym14122500] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/08/2022] [Accepted: 06/12/2022] [Indexed: 01/23/2023] Open
Abstract
The effect of the addition of fluorane microcapsules and urea formaldehyde resin (UF) waterborne acrylic resin microcapsules on the comprehensive properties of the water film on the surface of basswood was studied. Three-factor and two-level orthogonal experiments were carried out with "fluorane microcapsule content", "aqueous acrylic resin microcapsule content" and the "fluorane microcapsule addition method" to prepare a self-repairing thermochromic coating. The optical, mechanical, microstructure and self-repairing properties of the film were optimized by independent experiments on the maximum influence factors of the fluorane microcapsule content. It was concluded that the topcoat with 15% fluorane microcapsules and primer added with 15% water acrylic resin microcapsules had better comprehensive properties. The temperature range was 30-32 °C, the color difference at 32 °C was 72.6 ± 2.0, the 60° gloss was 3.3%, the adhesion was 0 grade, the hardness was 4 H, the impact resistance was 15.0 ± 0.8 kg∙cm, the elongation at break was 17.2% and the gap width was reduced by 3.5 ± 0.1 μm after the film was repaired. The repair rate reached 62.5%. By using microcapsule embedding technology, the repair agent and discoloration agent are embedded in the matrix. The waterborne acrylic resin microcapsules can effectively inhibit crack formation in the coating, and the fluorane microcapsules can achieve the thermochromic property of the coating. This study provides a new research idea for the self-repairing thermochromic dual function of a water-based coating.
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Affiliation(s)
- Pan Pan
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China;
- College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China;
| | - Xiaoxing Yan
- College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China;
- Correspondence:
| | - Lin Wang
- College of Furnishings and Industrial Design, Nanjing Forestry University, Nanjing 210037, China;
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7
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Microencapsulation of Essential Oils: A Review. Polymers (Basel) 2022; 14:polym14091730. [PMID: 35566899 PMCID: PMC9099681 DOI: 10.3390/polym14091730] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/12/2022] [Accepted: 04/18/2022] [Indexed: 12/13/2022] Open
Abstract
Essential oils (EOs) are complex mixtures of volatile compounds extracted from different parts of plants by different methods. There is a large diversity of these natural substances with varying properties that lead to their common use in several areas. The agrochemical, pharmaceutical, medical, food, and textile industry, as well as cosmetic and hygiene applications are some of the areas where EOs are widely included. To overcome the limitation of EOs being highly volatile and reactive, microencapsulation has become one of the preferred methods to retain and control these compounds. This review explores the techniques for extracting essential oils from aromatic plant matter. Microencapsulation strategies and the available technologies are also reviewed, along with an in-depth overview of the current research and application of microencapsulated EOs.
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8
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Abstract
Biodegradable and biocompatible biomaterials have offered much more opportunities from an engineering standpoint for treating diseases and maintaining health. Poly(ester amide)s (PEAs), as an outstanding family among such biomaterials, have risen overwhelmingly in the past decades. These synthetic polymers have easily and widely available raw materials and a diversity of synthetic approaches, which have attracted considerable attention. More importantly, combining the superiorities of polyamides and polyesters, PEAs have emerged with better functions. They could have improved biodegradability, biocompatibility, and cell-material interactions. The PEAs derived from α-amino acids even allow the introduction of pendant sites for further modification or functionalization. Meanwhile, it is gradually recognized that the chemical structures are closely related to the physiochemical and biological properties of PEAs so that their properties can be precisely controlled. PEAs therefore become significant materials in the biomedical fields. This review will attempt to summarize the recent progress in the development of PEAs with respect to the preparation materials and methods, structure-property relationships along with their latest biomedical accomplishments, especially for drug delivery and tissue engineering.
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Affiliation(s)
- Shuyan Han
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518057, People's Republic of China
| | - Jun Wu
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518057, People's Republic of China
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9
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Characterization of polyurea microcapsules synthesized with an isocyanate of low toxicity and eco-friendly esters via microfluidics: shape, shell thickness, morphology and encapsulation efficiency. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.03.026] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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10
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11
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Yang R, Lu X, Gu X. Pyrolysis Kinetics of a Lignin-Modified Cellulose Composite Film. ACS OMEGA 2021; 6:35584-35592. [PMID: 34984289 PMCID: PMC8717570 DOI: 10.1021/acsomega.1c05289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/07/2021] [Indexed: 06/14/2023]
Abstract
Cellulose is the most abundant natural biopolymer material, which has been widely used in film making and food packaging in recent years. However, lignin, a natural bioaromatic material, is always applied as a waste resource due to its low utilization efficiency. In this study, a ZnCl2/CaCl2/cellulose mixed system was used to prepare film materials via a regeneration method. The chemical structure and corresponding properties were characterized. The thermal decomposition process of film materials showed that with an increase of the heating rate, the maximum weight loss temperature gradually shifted to the higher-temperature region. Additionally, the combination of lignin with cellulose as composite films can effectively improve thermal stability. Furthermore, kinetics methods such as Kissing-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO), and Friedman were used to calculate the average activation energy (E). This study proposed a facile method for preparing biobased multifunctional composite films using two kinds of naturally renewable materials.
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12
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13
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Mytara AD, Chronaki K, Nikitakos V, Papaspyrides CD, Beltsios K, Vouyiouka S. Synthesis of Polyamide-Based Microcapsules via Interfacial Polymerization: Effect of Key Process Parameters. MATERIALS (BASEL, SWITZERLAND) 2021; 14:5895. [PMID: 34640292 PMCID: PMC8510004 DOI: 10.3390/ma14195895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/23/2021] [Accepted: 09/29/2021] [Indexed: 01/21/2023]
Abstract
Polyamide microcapsules have gathered significant research interest during the past years due to their good barrier properties; however, the potential of their application is limited due to the fragility of the polymeric membrane. Fully aliphatic polyamide microcapsules (PA MCs) were herein prepared from ethylene diamine and sebacoyl chloride via interfacial polymerization, and the effect of key encapsulation parameters, i.e., monomers ratio, core solvent, stirring rate and time during the polymerization step, were examined concerning attainable process yield and microcapsule properties (shell molecular weight and thermal properties, MC size and morphology). The process yield was found to be mainly influenced by the nature of the organic solvent, which was correlated to the diffusion potential of the diamine from the aqueous phase to the organic core through the polyamide membrane. Thus, spherical microcapsules with a size between 14 and 90 μm and a yield of 33% were prepared by using toluene as core solvent. Milder stirring during the polymerization step led to an improved microcapsule morphology; yet, the substantial improvement of mechanical properties remains a challenge.
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Affiliation(s)
- Angeliki D. Mytara
- Laboratory of Polymer Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 15780 Athens, Greece; (A.D.M.); (K.C.); (V.N.); (C.D.P.)
| | - Konstantina Chronaki
- Laboratory of Polymer Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 15780 Athens, Greece; (A.D.M.); (K.C.); (V.N.); (C.D.P.)
| | - Vasilis Nikitakos
- Laboratory of Polymer Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 15780 Athens, Greece; (A.D.M.); (K.C.); (V.N.); (C.D.P.)
| | - Constantine D. Papaspyrides
- Laboratory of Polymer Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 15780 Athens, Greece; (A.D.M.); (K.C.); (V.N.); (C.D.P.)
| | - Konstantinos Beltsios
- Department of Materials Science and Engineering, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 15780 Athens, Greece
| | - Stamatina Vouyiouka
- Laboratory of Polymer Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 15780 Athens, Greece; (A.D.M.); (K.C.); (V.N.); (C.D.P.)
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14
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Zarour A, Omar S, Abu-Reziq R. Preparation of Poly(ethylene glycol)@Polyurea Microcapsules Using Oil/Oil Emulsions and Their Application as Microreactors. Polymers (Basel) 2021; 13:polym13152566. [PMID: 34372169 PMCID: PMC8348332 DOI: 10.3390/polym13152566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 07/28/2021] [Accepted: 07/29/2021] [Indexed: 02/06/2023] Open
Abstract
The development process of catalytic core/shell microreactors, possessing a poly(ethylene glycol) (PEG) core and a polyurea (PU) shell, by implementing an emulsion-templated non-aqueous encapsulation method, is presented. The microreactors' fabrication process begins with an emulsification process utilizing an oil-in-oil (o/o) emulsion of PEG-in-heptane, stabilized by a polymeric surfactant. Next, a reaction between a poly(ethylene imine) (PEI) and a toluene-2,4-diisocyanate (TDI) takes place at the boundary of the emulsion droplets, resulting in the creation of a PU shell through an interfacial polymerization (IFP) process. The microreactors were loaded with palladium nanoparticles (NPs) and were utilized for the hydrogenation of alkenes and alkynes. Importantly, it was found that PEG has a positive effect on the catalytic performance of the developed microreactors. Interestingly, besides being an efficient green reaction medium, PEG plays two crucial roles: first, it reduces the palladium ions to palladium NPs; thus, it avoids the unnecessary use of additional reducing agents. Second, it stabilizes the palladium NPs and prevents their aggregation, allowing the formation of highly reactive palladium NPs. Strikingly, in one sense, the suggested system affords highly reactive semi-homogeneous catalysis, whereas in another sense, it enables the facile, rapid, and inexpensive recovery of the catalytic microreactor by simple centrifugation. The durable microreactors exhibit excellent activity and were recycled nine times without any loss in their reactivity.
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Affiliation(s)
| | | | - Raed Abu-Reziq
- Correspondence: ; Tel.: +972-2-6586097; Fax: +972-2-6585469
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15
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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.
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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
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16
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A Multi-Scale Approach to Microencapsulation by Interfacial Polymerization. Polymers (Basel) 2021; 13:polym13040644. [PMID: 33671501 PMCID: PMC7926481 DOI: 10.3390/polym13040644] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 02/09/2021] [Accepted: 02/15/2021] [Indexed: 11/23/2022] Open
Abstract
This work applies a multi-scale approach to the microencapsulation by interfacial polymerization. Such microencapsulation is used to produce fertilizers, pesticides and drugs. In this study, variations at three different scales (molecular, microscopic and macroscopic) of product design (i.e., product variables, process variables and properties) are considered simultaneously. We quantify the effect of the formulation, composition and pH change on the microcapsules’ properties. Additionally, the method of measuring the strength of the microcapsules by crushing a sample of microcapsules’ suspension was tested. Results show that the xylene release rate in the microcapsules decreases when the amine functionality is greater due to a stronger crosslinking. Such degree of crosslinking increases the compression force over the microcapsules and improves their appearance. When high levels of amine concentration are used, the initial pH values in the reaction are also high which leads to agglomeration. This study provides a possible explanation to the aggregation based on the kinetic and thermodynamic controls in reactions and shows that the pH measurements account for the polyurea reaction and carbamate formation, which is a reason why this is not a suitable method to study kinetics of polymerization. Finally, the method used to measure the compressive strength of the microcapsules detected differences in formulations and composition with low sensibility.
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17
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Tian Q, Zhou W, Cai Q, Ma G, Lian G. Concepts, processing, and recent developments in encapsulating essential oils. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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18
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Ahmad SU, Li B, Sun J, Arbab S, Dong Z, Cheng F, Zhou X, Mahfuz S, Zhang J. Recent advances in microencapsulation of drugs for veterinary applications. J Vet Pharmacol Ther 2021; 44:298-312. [PMID: 33438767 DOI: 10.1111/jvp.12946] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 08/27/2020] [Accepted: 12/28/2020] [Indexed: 01/03/2023]
Abstract
Microencapsulation is a process where very minute droplets or particles of solid or liquid or gas are trapped with a polymer to isolate the internal core material from external environmental hazards. Microencapsulation is applied mostly for flavor masking, fortification, and sustained and control release. It improves palatability, absorption, and bioavailability of drugs with good conformity. Microencapsulation has been widely studied in numerous drug delivery systems for human health. The application of microcapsules in the veterinary pharmaceutical sciences is increasing day by day. The treatment systems for humans and animals are likely to be similar, but more complex in the veterinary field due to the diversity of the species, breeds, body size, biotransformation rate, and other factors associated with animal physiology. Commercially viable, economically profitable, and therapeutically effective microencapsulated vaccine, anthelmintic, antibacterial, and other therapeutics have a great demand for livestock and poultry production. Nowadays, researchers emphasize the controlled and sustained-release dosage form of drugs in the veterinary field. This paper has highlighted the microencapsulation materials, preparation techniques, characteristics, roles, and the application of microcapsules in veterinary medicine.
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Affiliation(s)
- Salah Uddin Ahmad
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China.,Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Bing Li
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Jichao Sun
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Safia Arbab
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Zhen Dong
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Fusheng Cheng
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Xuzheng Zhou
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
| | - Shad Mahfuz
- Faculty of Veterinary, Animal and Biomedical Sciences, Sylhet Agricultural University, Sylhet, Bangladesh
| | - Jiyu Zhang
- Key Laboratory of Veterinary Pharmaceutical Development, Ministry of Agriculture, Lanzhou, China.,Key Laboratory of New Animal Drug Project of Gansu Province, Lanzhou, China.,Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, China
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19
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Cao X, Peng J, Fang X, Yang Z, Liao Z, Yan Z, Jiang C, Liu B, Zhang H. Process regulation for encapsulating pure polyamine via integrating microfluidic
T‐junction
and interfacial polymerization. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200217] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xianwu Cao
- National Engineering Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering (SCUT), Ministry of Education, South China University of Technology Guangzhou China
| | - Junjie Peng
- National Engineering Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering (SCUT), Ministry of Education, South China University of Technology Guangzhou China
| | - Xinglei Fang
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
| | - Zhitao Yang
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
| | - Zicen Liao
- National Engineering Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering (SCUT), Ministry of Education, South China University of Technology Guangzhou China
| | - Zhibin Yan
- Guangdong Provincial Key Laboratory of Optical Information Materials and Technology & Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics South China Normal University Guangzhou China
| | - Chuanxia Jiang
- Guangdong Research Institute of Petrochemical and Fine Chemical Engineering Guangzhou China
| | - Bin Liu
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
| | - He Zhang
- National Engineering Research Center of Novel Equipment for Polymer Processing Key Laboratory of Polymer Processing Engineering (SCUT), Ministry of Education, South China University of Technology Guangzhou China
- Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of Technology Guangzhou China
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20
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Fabrication and Characterization of a Low-Cost Microfluidic System for the Manufacture of Alginate-Lacasse Microcapsules. Polymers (Basel) 2020; 12:polym12051158. [PMID: 32438541 PMCID: PMC7284885 DOI: 10.3390/polym12051158] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/20/2020] [Accepted: 04/27/2020] [Indexed: 11/22/2022] Open
Abstract
The development of microfluidics-based systems in the recent years has provided a rapid and controlled method for the generation of monodisperse microencapsulates for multiple applications. Here, we explore the design, manufacture and characterization of a low-cost microsystem for the encapsulation of the fungal laccase from Pycnoporus sanguineus CS43 in alginate microcapsules. Multiphysics simulations were used to overview the fluid behavior within the device and estimate the resulting capsule size. Polymethylmethacrylate (PMMA) sheets were used for final microsystem manufacture. Different flow rates of the continuous (Qc) and discrete (Qd) phases in the ranges of 83–293 mL/h and 1–5 mL/h, respectively, were evaluated for microcapsule fabrication. Universal Serial Bus (USB) microscope and image analysis was used to measure the final particle size. Laccase encapsulation was evaluated using spectrophotometry and with the aid of fluorescent dyes and confocal microscopy. Results showed microcapsule size was in the range of 203.13–716.00 μm and Qc was found as the dominant parameter to control capsule size. There was an effective enzyme encapsulation of 65.94% with respect to the initial laccase solution.
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21
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Bah MG, Bilal HM, Wang J. Fabrication and application of complex microcapsules: a review. SOFT MATTER 2020; 16:570-590. [PMID: 31845956 DOI: 10.1039/c9sm01634a] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The development of new functional materials requires cutting-edge technologies for incorporating different functional materials without reducing their functionality. Microencapsulation is a method to encapsulate different functional materials at nano- and micro-scales, which can provide the necessary protection for the encapsulated materials. In this review, microencapsulation is categorized into chemical, physical, physico-chemical and microfluidic methods. The focus of this review is to describe these four categories in detail by elaborating their various microencapsulation methods and mechanisms. This review further discusses the key features and potential applications of each method. Through this review, the readers could be aware of many aspects of this field from the fabrication processes, to the main properties, and to the applications of microcapsules.
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Affiliation(s)
- Mohamed Gibril Bah
- School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, P. R. China.
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22
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Timilsena YP, Haque MA, Adhikari B. Encapsulation in the Food Industry: A Brief Historical Overview to Recent Developments. ACTA ACUST UNITED AC 2020. [DOI: 10.4236/fns.2020.116035] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Thorne MF, Simkovic F, Slater AG. Production of monodisperse polyurea microcapsules using microfluidics. Sci Rep 2019; 9:17983. [PMID: 31784621 PMCID: PMC6884639 DOI: 10.1038/s41598-019-54512-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Accepted: 11/13/2019] [Indexed: 12/29/2022] Open
Abstract
Methods to make microcapsules - used in a broad range of healthcare and energy applications - currently suffer from poor size control, limiting the establishment of size/property relationships. Here, we use microfluidics to produce monodisperse polyurea microcapsules (PUMC) with a limonene core. Using varied flow rates and a commercial glass chip, we produce capsules with mean diameters of 27, 30, 32, 34, and 35 µm, achieving narrow capsule size distributions of ±2 µm for each size. We describe an automated method of sizing droplets as they are produced using video recording and custom Python code. The sustainable generation of such size-controlled PUMCs, potential replacements for commercial encapsulated systems, will allow new insights into the effect of particle size on performance.
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Affiliation(s)
- Michael F Thorne
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK
| | - Felix Simkovic
- Institute of Integrative Biology, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Anna G Slater
- Department of Chemistry and Materials Innovation Factory, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
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24
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Zhang M, Zhu Z, Yuan S, Wang S, Yang C, Dwivedi P, Si T, Xu RX. One-step microencapsulation and spraying of pesticide formulations for improved adhesion and sustained release. J Microencapsul 2019; 36:649-658. [DOI: 10.1080/02652048.2019.1665118] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Ming Zhang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Zhiqiang Zhu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Shuai Yuan
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Shiyu Wang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Chaoyu Yang
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Pankaj Dwivedi
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
| | - Ting Si
- Department of Modern Mechanics, University of Science and Technology of China, Hefei, PR China
| | - Ronald X. Xu
- Department of Precision Machinery and Precision Instrumentation, University of Science and Technology of China, Hefei, PR China
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, USA
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25
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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]
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26
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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
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27
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Yoo Y, Martinez C, Youngblood JP. Synthesis and Characterization of Microencapsulated Phase Change Materials with Poly(urea-urethane) Shells Containing Cellulose Nanocrystals. ACS APPLIED MATERIALS & INTERFACES 2017; 9:31763-31776. [PMID: 28787125 DOI: 10.1021/acsami.7b06970] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The main objective of this study is to develop microencapsulation technology for thermal energy storage incorporating a phase change material (PCM) in a composite wall shell, which can be used to create a stable environment and allow the PCM to undergo phase change without any outside influence. Surface modification of cellulose nanocrystals (CNCs) was conducted by grafting poly(lactic acid) oligomers and oleic acid to improve the dispersion of nanoparticles in a polymeric shell. A microencapsulated phase change material (methyl laurate) with poly(urea-urethane) (PU) composite shells containing the hydrophobized cellulose nanocrystals (hCNCs) was fabricated using an in situ emulsion interfacial polymerization process. The encapsulation process of the PCMs with subsequent interfacial hCNC-PU to form composite microcapsules as well as their morphology, composition, thermal properties, and release rates was examined in this study. Oil soluble Sudan II dye solution in methyl laurate was used as a model hydrophobic fill, representing other latent fills with low partition coefficients, and their encapsulation efficiency as well as dye release rates were measured spectroscopically in a water medium. The influence of polyol content in the PU polymer matrix of microcapsules was investigated. An increase in polyol contents leads to an increase in the mean size of microcapsules but a decrease in the gel content (degree of cross-linking density) and permeability of their shell structure. The encapsulated PCMs for thermal energy storage demonstrated here exhibited promising performance for possible use in building or paving materials in terms of released heat, desired phase transformation temperature, chemical and physical stability, and concrete durability during placement.
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Affiliation(s)
- Youngman Yoo
- School of Materials Engineering, Purdue University , West Lafayette, Indiana 47907, United States
| | - Carlos Martinez
- School of Materials Engineering, Purdue University , West Lafayette, Indiana 47907, United States
| | - Jeffrey P Youngblood
- School of Materials Engineering, Purdue University , West Lafayette, Indiana 47907, United States
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28
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Research Advances of Microencapsulation and Its Prospects in the Petroleum Industry. MATERIALS 2017; 10:ma10040369. [PMID: 28772728 PMCID: PMC5506935 DOI: 10.3390/ma10040369] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 03/13/2017] [Accepted: 03/16/2017] [Indexed: 01/20/2023]
Abstract
Additives in the petroleum industry have helped form an efficient system in the past few decades. Nowadays, the development of oil and gas has been facing more adverse conditions, and smart response microcapsules with the abilities of self-healing, and delayed and targeted release are introduced to eliminate obstacles for further exploration in the petroleum industry. However, limited information is available, only that of field measurement data, and not mechanism theory and structural innovation data. Thus we propose that the basic type, preparation, as well as mechanism of microcapsules partly depend on other mature fields. In this review, we explore the latest advancements in evaluating microcapsules, such as X-ray computed tomography (XCT), simulation, and modeling. Finally, some novel microencapsulated additives with unparalleled advantages, such as flexibility, efficiency, and energy-conservation are described.
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29
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Ayad MM, Amer WA, Kotp MG, Minisy IM, Rehab AF, Kopecký D, Fitl P. Synthesis of silver-anchored polyaniline–chitosan magnetic nanocomposite: a smart system for catalysis. RSC Adv 2017. [DOI: 10.1039/c7ra02575k] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel and smart four component system composed of chitosan, polyaniline, magnetite and silver was exploited for catalysis.
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Affiliation(s)
- Mohamad M. Ayad
- Chemistry Department
- Faculty of Science
- Tanta University
- Tanta 31527
- Egypt
| | - Wael A. Amer
- Chemistry Department
- Faculty of Science
- Tanta University
- Tanta 31527
- Egypt
| | - Mohammed G. Kotp
- Chemistry Department
- Faculty of Science
- Tanta University
- Tanta 31527
- Egypt
| | - Islam M. Minisy
- Chemistry Department
- Faculty of Science
- Tanta University
- Tanta 31527
- Egypt
| | - Ahmed F. Rehab
- Chemistry Department
- Faculty of Science
- Tanta University
- Tanta 31527
- Egypt
| | - Dušan Kopecký
- Department of Physics and Measurements
- Faculty of Chemical Engineering
- University of Chemistry and Technology
- 166 28 Prague
- Czech Republic
| | - Přemysl Fitl
- Department of Physics and Measurements
- Faculty of Chemical Engineering
- University of Chemistry and Technology
- 166 28 Prague
- Czech Republic
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30
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Alexandrino EM, Wagner M, Landfester K, Wurm FR. Poly(phosphoester) Colloids by Interfacial Polycondensation in Miniemulsion. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600218] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Manfred Wagner
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Germany
| | | | - Frederik R. Wurm
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Germany
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31
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Liao Z, Xue D, Li H, Shi L. Fragrance-Containing Microcapsules Based on Interfacial Thiol-Ene Polymerization. J Appl Polym Sci 2016. [DOI: 10.1002/app.43905] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Ziyang Liao
- School of Pharmacy; East China University of Science and Technology; Shanghai 200237 China
| | - Daquan Xue
- Shanghai Yilian Chemical and Hi-Tech Co., Ltd; Shanghai 201203 China
| | - Hao Li
- School of Pharmacy; East China University of Science and Technology; Shanghai 200237 China
| | - Lei Shi
- Corporate R&D Division; Firmenich Aromatics (China) Co., Ltd; Shanghai 201108 China
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32
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Wu Y, Shen J, Larcinese-Hafner V, Erni P, Ouali L. Hybrid microcapsules with tunable properties via Pickering emulsion templates for the encapsulation of bioactive volatiles. RSC Adv 2016. [DOI: 10.1039/c6ra21338c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hybrid microcapsules with tunable properties and low permeability were fabricated via Pickering emulsion templates for the encapsulation of bioactive volatiles.
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Affiliation(s)
- Yongtao Wu
- Firmenich Aromatics (China) Co., Ltd
- Shanghai 201108
- China
| | - Jiajun Shen
- Firmenich Aromatics (China) Co., Ltd
- Shanghai 201108
- China
| | | | - Philipp Erni
- Firmenich SA
- Cooperate Research Division
- CH-1211 Geneva 8
- Switzerland
| | - Lahoussine Ouali
- Firmenich SA
- Cooperate Research Division
- CH-1211 Geneva 8
- Switzerland
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33
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Weiss E, Gertopski D, Gupta MK, Abu-Reziq R. Encapsulation of ionic liquid BMIm[PF6] within polyurea microspheres. REACT FUNCT POLYM 2015. [DOI: 10.1016/j.reactfunctpolym.2015.09.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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34
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Yuan H, Li G, Yang L, Yan X, Yang D. Development of melamine-formaldehyde resin microcapsules with low formaldehyde emission suited for seed treatment. Colloids Surf B Biointerfaces 2015; 128:149-154. [PMID: 25734968 DOI: 10.1016/j.colsurfb.2015.02.029] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 01/14/2015] [Accepted: 02/13/2015] [Indexed: 11/29/2022]
Abstract
To reduce the application frequency and improve the efficacy of insecticides, melamine-formaldehyde (MF) resin microcapsules suited for seed treatment containing a mixture of fipronil and chlorpyrifos were prepared by in situ polymerization. A formaldehyde/melamine molar ratio of 4:1 yielded microcapsules with the smallest size and the most narrow size distribution. The level of unreacted formaldehyde in the microcapsule suspension increased proportionally with the F/M molar ratio. When the MF resin microcapsule suspension was used as a seed treatment to coat peanut seeds, the unreacted formaldehyde did not significantly inhibit the seedling emergence, but the ongoing release of formaldehyde generated from the degradation of MF resins played an important role in inhibiting emergence. Melamine was shown to be an effective formaldehyde scavenger that mitigated this inhibition when it was incorporated within the microcapsule wall. Field experiments showed that MF-resin-encapsulated mixtures of fipronil and chlorpyrifos have much greater efficacies against white grubs than the conventional formulation.
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Affiliation(s)
- Huizhu Yuan
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China; Department of Agronomy, Northeast Agricultural University, Harbin 150030, China
| | - Guangxing Li
- Department of Agronomy, Northeast Agricultural University, Harbin 150030, China
| | - Lijuan Yang
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xiaojing Yan
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Daibin Yang
- Key Laboratory of Integrated Pest Management in Crops, Ministry of Agriculture, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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35
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Lai GW, Chang SJ, Lee JT, Liu H, Li CC. Conductive microcapsules for self-healing electric circuits. RSC Adv 2015. [DOI: 10.1039/c5ra22021a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Well dispersed conductive microcapsules can be processed directly with inorganic-based Ag paste and perform high restoration efficiency for as-cast electrical circuits.
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Affiliation(s)
- G. W. Lai
- Department of Materials & Mineral Resources Engineering
- Institute of Materials Science and Engineering
- National Taipei University of Technology
- Taipei 10608
- Taiwan
| | - S. J. Chang
- Material and Chemical Research Laboratories
- Industrial Technology Research Institute
- Hsinchu 30011
- Taiwan
| | - J. T. Lee
- Department of Chemistry
- National Sun Yat-Sen University
- Kaohsiung 80424
- Taiwan
- Department of Medicinal and Applied Chemistry
| | - H. Liu
- Department of Materials & Mineral Resources Engineering
- Institute of Materials Science and Engineering
- National Taipei University of Technology
- Taipei 10608
- Taiwan
| | - C. C. Li
- Department of Materials & Mineral Resources Engineering
- Institute of Materials Science and Engineering
- National Taipei University of Technology
- Taipei 10608
- Taiwan
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36
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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.
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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
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37
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Perignon C, Ongmayeb G, Neufeld R, Frere Y, Poncelet D. Microencapsulation by interfacial polymerisation: membrane formation and structure. J Microencapsul 2014; 32:1-15. [DOI: 10.3109/02652048.2014.950711] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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