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Morphological, rheological and thermal characteristics of biopolymeric microcapsules loaded with plant stimulants. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03057-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yuan Y, He N, Dong L, Guo Q, Zhang X, Li B, Li L. Multiscale Shellac-Based Delivery Systems: From Macro- to Nanoscale. ACS NANO 2021; 15:18794-18821. [PMID: 34806863 DOI: 10.1021/acsnano.1c07121] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Delivery systems play a crucial role in enhancing the activity of active substances; however, they require complex processing techniques and raw material design to achieve the desired properties. In this regard, raw materials that can be easily processed for different delivery systems are garnering attention. Among these raw materials, shellac, which is the only pharmaceutically used resin of animal origin, has been widely used in the development of various delivery systems owing to its pH responsiveness, biocompatibility, and degradability. Notably, shellac performs better on encapsulating hydrophobic active substances than other natural polymers, such as polysaccharides and proteins. In addition, specially designed shellac-based delivery systems can also be used for the codelivery of hydrophilic and hydrophobic active substances. Shellac is most widely used for oral administration, as shellac-based delivery systems can form a compact structure through hydrophobic interaction, protecting transported active substances from the harsh environment of the stomach to achieve targeted delivery in the small intestine or colon. In this review, the advantages of shellac in delivery systems are discussed in detail. Multiscale shellac-based delivery systems from the macroscale to nanoscale are comprehensively introduced, including matrix tablets, films, enteric coatings, hydrogels, microcapsules, microparticles (beads/spheres), nanoparticles, and nanofibers. Furthermore, the hotspots, deficiencies, and future perspectives of shellac-based delivery system development are also analyzed. We hoped this review will increase the understanding of shellac-based delivery systems and inspire their further development.
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Affiliation(s)
- Yi Yuan
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Ni He
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Liya Dong
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Qiyong Guo
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Xia Zhang
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Bing Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
| | - Lin Li
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
- Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, South China University of Technology, Guangzhou 510640, China
- Engineering Research Center of Starch and Plant Protein Deep Processing, Ministry of Education, South China University of Technology, Guangzhou 510640, China
- School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
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Al-Obaidy SSM, Greenway GM, Paunov VN. Enhanced Antimicrobial Action of Chlorhexidine Loaded in Shellac Nanoparticles with Cationic Surface Functionality. Pharmaceutics 2021; 13:1389. [PMID: 34575466 PMCID: PMC8470920 DOI: 10.3390/pharmaceutics13091389] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 08/28/2021] [Accepted: 08/29/2021] [Indexed: 12/01/2022] Open
Abstract
We report on an active nanocarrier for chlorhexidine (CHX) based on sterically stabilized shellac nanoparticles (NPs) with dual surface functionalization, which greatly enhances the antimicrobial action of CHX. The fabrication process for the CHX nanocarrier is based on pH-induced co-precipitation of CHX-DG from an aqueous solution of ammonium shellac and Poloxamer 407 (P407), which serves as a steric stabilizing agent. This is followed by further surface modification with octadecyl trimethyl ammonium bromide (ODTAB) through a solvent change to yield cationic surface functionality. In this study, we assessed the encapsulation efficiency and release kinetics of the novel nanocarrier for CHX. We further examined the antimicrobial effects of the CHX nanocarriers and their individual components in order to gain better insight into how they work, to improve their design and to explore the impacts of their dual functionalization. The antimicrobial actions of CHX loaded in shellac NPs were examined on three different proxy microorganisms: a Gram-negative bacterium (E. coli), a yeast (S. cerevisiae) and a microalgae (C. reinhardtii). The antimicrobial actions of free CHX and CHX-loaded shellac NPs were compared over the same CHX concentration range. We found that the non-coated shellac NPs loaded with CHX showed inferior action compared with free CHX due to their negative surface charge; however, the ODTAB-coated, CHX-loaded shellac NPs strongly amplified the antimicrobial action of the CHX for the tested microorganisms. The enhancement of the CHX antimicrobial action was thought to be due to the increased electrostatic adhesion between the cationic surface of the ODTAB-coated, CHX-loaded shellac NPs and the anionic surface of the cell walls of the microorganisms, ensuring direct delivery of CHX with a high concentration locally on the cell membrane. The novel CHX nanocarriers with enhanced antimicrobial action may potentially find applications in dentistry for the development of more efficient formulations against conditions such as gingivitis, periodontitis and other oral infections, as well as enabling formulations to have lower CHX concentrations.
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Affiliation(s)
- Saba S. M. Al-Obaidy
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK; (S.S.M.A.-O.); (G.M.G.)
- Department of Chemistry, College of Science, University of Babylon, Hilla 51001, Iraq
| | - Gillian M. Greenway
- Department of Chemistry and Biochemistry, University of Hull, Hull HU6 7RX, UK; (S.S.M.A.-O.); (G.M.G.)
| | - Vesselin N. Paunov
- Department of Chemistry, Nazarbayev University, Kabanbay Batyr Ave. 53, Nursultan 010000, Kazakhstan
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Al-Qatatsheh A, Morsi Y, Zavabeti A, Zolfagharian A, Salim N, Z. Kouzani A, Mosadegh B, Gharaie S. Blood Pressure Sensors: Materials, Fabrication Methods, Performance Evaluations and Future Perspectives. SENSORS (BASEL, SWITZERLAND) 2020; 20:E4484. [PMID: 32796604 PMCID: PMC7474433 DOI: 10.3390/s20164484] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 07/31/2020] [Accepted: 08/04/2020] [Indexed: 12/14/2022]
Abstract
Advancements in materials science and fabrication techniques have contributed to the significant growing attention to a wide variety of sensors for digital healthcare. While the progress in this area is tremendously impressive, few wearable sensors with the capability of real-time blood pressure monitoring are approved for clinical use. One of the key obstacles in the further development of wearable sensors for medical applications is the lack of comprehensive technical evaluation of sensor materials against the expected clinical performance. Here, we present an extensive review and critical analysis of various materials applied in the design and fabrication of wearable sensors. In our unique transdisciplinary approach, we studied the fundamentals of blood pressure and examined its measuring modalities while focusing on their clinical use and sensing principles to identify material functionalities. Then, we carefully reviewed various categories of functional materials utilized in sensor building blocks allowing for comparative analysis of the performance of a wide range of materials throughout the sensor operational-life cycle. Not only this provides essential data to enhance the materials' properties and optimize their performance, but also, it highlights new perspectives and provides suggestions to develop the next generation pressure sensors for clinical use.
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Affiliation(s)
- Ahmed Al-Qatatsheh
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Yosry Morsi
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Ali Zavabeti
- Department of Chemical Engineering, The University of Melbourne, Parkville VIC 3010, Australia;
| | - Ali Zolfagharian
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Nisa Salim
- Faculty of Science, Engineering, and Technology (FSET), Swinburne University of Technology, Melbourne VIC 3122, Australia; (Y.M.); (N.S.)
| | - Abbas Z. Kouzani
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
| | - Bobak Mosadegh
- Dalio Institute of Cardiovascular Imaging, Weill Cornell Medicine, New York, NY 10065, USA;
| | - Saleh Gharaie
- Faculty of Science, Engineering and Built Environment, School of Engineering, Deakin University, Waurn Ponds VIC 3216, Australia; (A.Z.); (A.Z.K.)
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Zhao J, Guo Q, Huang W, Zhang T, Wang J, Zhang Y, Huang L, Tang Y. Shape Tuning and Size Prediction of Millimeter-Scale Calcium-Alginate Capsules with Aqueous Core. Polymers (Basel) 2020; 12:polym12030688. [PMID: 32204447 PMCID: PMC7183268 DOI: 10.3390/polym12030688] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 03/16/2020] [Accepted: 03/16/2020] [Indexed: 11/16/2022] Open
Abstract
Controllable feature and size, good mechanical stability and intelligent release behavior is the capsule products relentless pursuit of the goal. In addition, to illustrate the quantitative relationship of structure and performance is also important for encapsulation technology development. In this study, the sphericity and size of millimeter-scale calcium sodium alginate capsules (mm-CaSA-Caps) with aqueous core were well tuned by manipulating the viscosity, surface tension, and density of CaCl2/carboxyl methyl cellulose (CMC) drops and sodium alginate (SA) solution. The well-tuned mm-CaSA-Caps showed significant mechanical and control-releasing property effects. The results showed that the prepared mm-CaSA-Caps were highly monodispersed with average diameter from 3.8 to 4.8 mm. The viscosity of the SA solution and the viscosity and surface tension of the CaCl2/CMC solution had significant effects on the mm-CaSA-Caps sphericity. Uniform and spherical mm-CaSA-Caps could be formed with high viscosity CaCl2/CMC solution (between 168.5 and 917.5 mPa·s), low viscosity SA solution (between 16.2 and 72.0 mPa·s) and decreased surface tension SA solution (by adding 0.01 wt.% poloxamer 407). The diameter of the mm-CaSA-Caps could be predicted by a modified Tate’s law, which correlated well with the experimental data. The Caps with sphericity factor (SF) < 0.07 had better mechanical stability, with the crushing force 2.91–15.5 times and the surface Young’s modulus 2.1–3.99 times higher than those of the non-spherical Caps (SF > 0.07). Meanwhile, the spherical Caps had a more even permeation rate, which was helpful in producing uniform and sustained releasing applications in foodstuff, medicine, agriculture and chemical industry.
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Affiliation(s)
- Jinchao Zhao
- Hubei Biomass Fibers and Eco-dyeing & Finishing Key Laboratory, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China; (J.Z.); (Q.G.); (W.H.); (J.W.)
- Institute for NanoScale Science & Technology, College of Science and Engineering, Flinders University, South Australia 5042, Australia
| | - Qing Guo
- Hubei Biomass Fibers and Eco-dyeing & Finishing Key Laboratory, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China; (J.Z.); (Q.G.); (W.H.); (J.W.)
| | - Wei Huang
- Hubei Biomass Fibers and Eco-dyeing & Finishing Key Laboratory, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China; (J.Z.); (Q.G.); (W.H.); (J.W.)
| | - Teng Zhang
- School of Material Science and Engineering, Wuhan Textile University, Wuhan 430200, China; (T.Z.); (Y.Z.)
| | - Jing Wang
- Hubei Biomass Fibers and Eco-dyeing & Finishing Key Laboratory, School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430200, China; (J.Z.); (Q.G.); (W.H.); (J.W.)
| | - Yu Zhang
- School of Material Science and Engineering, Wuhan Textile University, Wuhan 430200, China; (T.Z.); (Y.Z.)
| | - Leping Huang
- School of Material Science and Engineering, Wuhan Textile University, Wuhan 430200, China; (T.Z.); (Y.Z.)
- Institute for NanoScale Science & Technology, College of Science and Engineering, Flinders University, South Australia 5042, Australia
- Correspondence: (L.H.); (Y.T.); Tel.: +86-27-59367580 (L.H.); +61-8-82012138 (Y.T.)
| | - Youhong Tang
- Institute for NanoScale Science & Technology, College of Science and Engineering, Flinders University, South Australia 5042, Australia
- Correspondence: (L.H.); (Y.T.); Tel.: +86-27-59367580 (L.H.); +61-8-82012138 (Y.T.)
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Degen P, Paulus M, Zwar E, Jakobi V, Dogan S, Tolan M, Rehage H. Surfactant‐mediated formation of alginate layers at the water‐air interface. SURF INTERFACE ANAL 2019. [DOI: 10.1002/sia.6691] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
| | | | - Elena Zwar
- Faculty of ChemistryTU Dortmund Dortmund Germany
| | - Victoria Jakobi
- Analytical Chemistry—BiointerfacesRuhr‐University Bochum Bochum Germany
| | - Susanne Dogan
- Faculty of Physics/DELTATU Dortmund Dortmund Germany
| | - Metin Tolan
- Faculty of Physics/DELTATU Dortmund Dortmund Germany
| | - Heinz Rehage
- Faculty of ChemistryTU Dortmund Dortmund Germany
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9
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Al-Obaidy SSM, Greenway GM, Paunov VN. Dual-functionalised shellac nanocarriers give a super-boost of the antimicrobial action of berberine. NANOSCALE ADVANCES 2019; 1:858-872. [PMID: 36132264 PMCID: PMC9473176 DOI: 10.1039/c8na00121a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 11/20/2018] [Indexed: 05/06/2023]
Abstract
We have developed highly efficient antimicrobial nanocarriers for berberine (BRB) based on shellac nanoparticles (NPs) which were surface-functionalised with a surface active polymer, Poloxamer 407 (P407), and the cationic surfactant octadecyltrimethylammonium bromide (ODTAB). These shellac nanocarriers were produced in a two-step process which involves: (i) a pH change from aqueous ammonium shellac solution using P407 as a steric stabilizer in the presence of berberine chloride, and (ii) addition of ODTAB to yield shellac nanocarriers of cationic surface. We determined the BRB encapsulation efficiency and release profiles from such nanocarriers. We explored the antimicrobial action of these nanocarriers at different stages of their preparation which allowed us gain better understanding how they work, fine tune their design and reveal the impact of the nanoparticle coatings on to its antimicrobial effect. The antimicrobial action of BRB loaded within such shellac NPs with cationic surface functionality was examined on three different microorganisms, C. reinhardtii, S. cerevisiae and E. coli and compared with the effect of free BRB as well as non-coated BRB-loaded nanocarriers at the same BRB concentrations. We found that the cationic surface coating of the shellac NPs strongly amplified the efficiency of the encapsulated BRB across all tested microorganisms. The effect was attributed to the increased attraction between the ODTAB-coated BRB-loaded NPs and the anionic surface of the cell walls which delivers locally high BRB concentration. This nanotechnological approach could lead to more effective antimicrobial and disinfecting agents, dental formulations for plaque control, wound dressings, antialgal/antibiofouling formulations and antifungal agents.
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Affiliation(s)
- Saba S M Al-Obaidy
- Department of Chemistry and Biochemistry, University of Hull Hull HU67RX UK +44 (0)1482 466410 +44 (0)1482 465660
| | - Gillian M Greenway
- Department of Chemistry and Biochemistry, University of Hull Hull HU67RX UK +44 (0)1482 466410 +44 (0)1482 465660
| | - Vesselin N Paunov
- Department of Chemistry and Biochemistry, University of Hull Hull HU67RX UK +44 (0)1482 466410 +44 (0)1482 465660
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Al-Obaidy SSM, Halbus AF, Greenway GM, Paunov VN. Boosting the antimicrobial action of vancomycin formulated in shellac nanoparticles of dual-surface functionality. J Mater Chem B 2019. [DOI: 10.1039/c8tb03102a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We demonstrate a strong enhancement of the antimicrobial action of vancomycin encapsulated in shellac nanocarriers with cationic surface functionality which concentrate on the microbial cell membranes.
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Affiliation(s)
- Saba S. M. Al-Obaidy
- Department of Chemistry and Biochemistry
- University of Hull
- Hull
- UK
- Department of Chemistry
| | - Ahmed F. Halbus
- Department of Chemistry and Biochemistry
- University of Hull
- Hull
- UK
- Department of Chemistry
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Matsushita AF, Filho CM, Pineiro M, Pais AA, Valente AJ. Effect of Eu(III) and Tb(III) chloride on the gelification behavior of poly(sodium acrylate). J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.05.040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Zwar E, Kemna A, Richter L, Degen P, Rehage H. Production, deformation and mechanical investigation of magnetic alginate capsules. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:085101. [PMID: 29323659 DOI: 10.1088/1361-648x/aaa6f5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In this article we investigated the deformation of alginate capsules in magnetic fields. The sensitivity to magnetic forces was realised by encapsulating an oil in water emulsion, where the oil droplets contained dispersed magnetic nanoparticles. We solved calcium ions in the aqueous emulsion phase, which act as crosslinking compounds for forming thin layers of alginate membranes. This encapsulating technique allows the production of flexible capsules with an emulsion as the capsule core. It is important to mention that the magnetic nanoparticles were stable and dispersed throughout the complete process, which is an important difference to most magnetic alginate-based materials. In a series of experiments, we used spinning drop techniques, capsule squeezing experiments and interfacial shear rheology in order to determine the surface Young moduli, the surface Poisson ratios and the surface shear moduli of the magnetically sensitive alginate capsules. In additional experiments, we analysed the capsule deformation in magnetic fields. In spinning drop and capsule squeezing experiments, water droplets were pressed out of the capsules at elevated values of the mechanical load. This phenomenon might be used for the mechanically triggered release of water-soluble ingredients. After drying the emulsion-filled capsules, we produced capsules, which only contained a homogeneous oil phase with stable suspended magnetic nanoparticles (organic ferrofluid). In the dried state, the thin alginate membranes of these particles were rather rigid. These dehydrated capsules could be stored at ambient conditions for several months without changing their properties. After exposure to water, the alginate membranes rehydrated and became flexible and deformable again. During this swelling process, water diffused back in the capsule. This long-term stability and rehydration offers a great spectrum of different applications as sensors, soft actuators, artificial muscles or drug delivery systems.
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Affiliation(s)
- Elena Zwar
- Physikalische Chemie II, TU Dortmund, 44227 Dortmund, Germany
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Synthesis and Characterization of Nanofunctionalized Gelatin Methacrylate Hydrogels. Int J Mol Sci 2017; 18:ijms18122675. [PMID: 29232870 PMCID: PMC5751277 DOI: 10.3390/ijms18122675] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 11/27/2017] [Accepted: 11/28/2017] [Indexed: 11/17/2022] Open
Abstract
Given the importance of the extracellular medium during tissue formation, it was wise to develop an artificial structure that mimics the extracellular matrix while having improved physico-chemical properties. That is why the choice was focused on gelatin methacryloyl (GelMA), an inexpensive biocompatible hydrogel. Physicochemical and mechanical properties were improved by the incorporation of nanoparticles developed from two innovative fabrication processes: High shear fluid and low frequencies/high frequencies ultrasounds. Both rapeseed nanoliposomes and nanodroplets were successfully incorporated in the GelMA networks during the photo polymerization process. The impact on polymer microstructure was investigated by Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and enzymatic degradation investigations. Mechanical stability and viscoelastic tests were conducted to demonstrate the beneficial effect of the functionalization on GelMA hydrogels. Adding nanoparticles to GelMA improved the surface properties (porosity), tuned swelling, and degradability properties. In addition, we observed that nanoemulsion didn't change significantly the mechanical properties to shear and compression solicitations, whereas nanoliposome addition decreased Young's modulus under compression solicitations. Thus, these ways of functionalization allow controlling the design of the material by choosing the type of nanoparticle (nanoliposome or nanoemulsion) in function of the application.
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Ben Messaoud G, Sánchez-González L, Probst L, Jeandel C, Arab-Tehrany E, Desobry S. Physico-chemical properties of alginate/shellac aqueous-core capsules: Influence of membrane architecture on riboflavin release. Carbohydr Polym 2016; 144:428-37. [DOI: 10.1016/j.carbpol.2016.02.081] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Revised: 02/23/2016] [Accepted: 02/29/2016] [Indexed: 12/23/2022]
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Ben Messaoud G, Sánchez-González L, Probst L, Desobry S. Influence of internal composition on physicochemical properties of alginate aqueous-core capsules. J Colloid Interface Sci 2016; 469:120-128. [DOI: 10.1016/j.jcis.2016.02.018] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Accepted: 02/04/2016] [Indexed: 01/06/2023]
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16
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Ben Messaoud G, Sánchez-González L, Jacquot A, Probst L, Desobry S. Alginate/sodium caseinate aqueous-core capsules: A pH-responsive matrix. J Colloid Interface Sci 2015; 440:1-8. [DOI: 10.1016/j.jcis.2014.10.042] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 10/24/2014] [Accepted: 10/25/2014] [Indexed: 01/15/2023]
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Vöpel T, Scholz R, Davico L, Groß M, Büning S, Kareth S, Weidner E, Ebbinghaus S. Infrared laser triggered release of bioactive compounds from single hard shell microcapsules. Chem Commun (Camb) 2015; 51:6913-6. [DOI: 10.1039/c4cc09745a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Thermal microscopy combines laser-induced heating and real time imaging. Temperature jumps release bioactive compounds from temperature sensitive single microcapsules.
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Affiliation(s)
- Tobias Vöpel
- Department of Physical Chemistry II
- Ruhr-University Bochum
- 44780 Bochum
- Germany
| | - Rebecca Scholz
- Chair of Process Technology
- Ruhr-University Bochum
- Germany
- Fraunhofer Institute UMSICHT
- Oberhausen
| | - Luca Davico
- Chair of Process Technology
- Ruhr-University Bochum
- Germany
| | - Magdalena Groß
- Department of Physical Chemistry II
- Ruhr-University Bochum
- 44780 Bochum
- Germany
| | - Steffen Büning
- Department of Physical Chemistry II
- Ruhr-University Bochum
- 44780 Bochum
- Germany
| | - Sabine Kareth
- Chair of Process Technology
- Ruhr-University Bochum
- Germany
- Fraunhofer Institute UMSICHT
- Oberhausen
| | - Eckhard Weidner
- Chair of Process Technology
- Ruhr-University Bochum
- Germany
- Fraunhofer Institute UMSICHT
- Oberhausen
| | - Simon Ebbinghaus
- Department of Physical Chemistry II
- Ruhr-University Bochum
- 44780 Bochum
- Germany
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Kong T, Wang L, Wyss HM, Shum HC. Capillary micromechanics for core-shell particles. SOFT MATTER 2014; 10:3271-3276. [PMID: 24626294 DOI: 10.1039/c3sm53066c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
In this work, we have developed a facile, economical microfluidic approach as well as a simple model description to measure and predict the mechanical properties of composite core-shell microparticles made from materials with dramatically different elastic properties. By forcing the particles through a tapered capillary and analyzing their deformation, the shear and compressive moduli can be measured in one single experiment. We have also formulated theoretical models that accurately capture the moduli of the microparticles in both the elastic and the non-linear deformation regimes. Our results show how the moduli of these core-shell structures depend on the material composition of the core-shell microparticles, as well as on their microstructures. The proposed technique and the understanding enabled by it also provide valuable insights into the mechanical behavior of analogous biomaterials, such as liposomes and cells.
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Affiliation(s)
- Tiantian Kong
- Department of Mechanical Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong.
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Neubauer MP, Poehlmann M, Fery A. Microcapsule mechanics: from stability to function. Adv Colloid Interface Sci 2014; 207:65-80. [PMID: 24345731 DOI: 10.1016/j.cis.2013.11.016] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 11/18/2013] [Accepted: 11/21/2013] [Indexed: 01/22/2023]
Abstract
Microcapsules are reviewed with special emphasis on the relevance of controlled mechanical properties for functional aspects. At first, assembly strategies are presented that allow control over the decisive geometrical parameters, diameter and wall thickness, which both influence the capsule's mechanical performance. As one of the most powerful approaches the layer-by-layer technique is identified. Subsequently, ensemble and, in particular, single-capsule deformation techniques are discussed. The latter generally provide more in-depth information and cover the complete range of applicable forces from smaller than pN to N. In a theory chapter, we illustrate the physics of capsule deformation. The main focus is on thin shell theory, which provides a useful approximation for many deformation scenarios. Finally, we give an overview of applications and future perspectives where the specific design of mechanical properties turns microcapsules into (multi-)functional devices, enriching especially life sciences and material sciences.
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Kropat C, Betz M, Kulozik U, Leick S, Rehage H, Boettler U, Teller N, Marko D. Effect of microformulation on the bioactivity of an anthocyanin-rich bilberry pomace extract ( Vaccinium myrtillus L.) in vitro. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:4873-4881. [PMID: 23581244 DOI: 10.1021/jf305180j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In cell culture were compared the different release rates of anthocyanins from a bilberry pomace extract encapsulated either in food grade whey protein-based matrix capsules (WPC) or in pectin amid-based hollow spherical capsules (PHS). The impact of the formulations on typical anthocyanin-associated biological end points such as inhibition of the epidermal growth factor receptor (EGFR) and suppression of cell growth in HT29 colon carcinoma cells was assessed. The purpose was to find whether the release rates are sufficient to maintain biological activity and whether encapsulation affected EGFR inhibitory and growth suppressive properties of the extract. Even though anthocyanin release from extract-loaded capsules was proven under cell culture conditions, the inhibitory potential toward the EGFR was diminished. However, nonencapsulated extract as well as both extract-loaded encapsulation systems diminished the growth of HT29 cells to a comparable extent. The loss of EGFR inhibitory properties by encapsulation despite anthocyanin release indicates substantial contribution of other further constituents not monitored so far. Taken together, both applied encapsulation strategies allowed anthocyanin release and maintained biological activity with respect to growth inhibitory properties. However, the loss of EGFR inhibitory effects emphasizes the need for biological profiling to estimate process-induced changes of plant constituent's beneficial potencies.
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Affiliation(s)
- Christopher Kropat
- Department of Food Chemistry and Toxicology, University of Vienna, Vienna, Austria
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Henning S, Edelhoff D, Ernst B, Leick S, Rehage H, Suter D. Characterizing permeability and stability of microcapsules for controlled drug delivery by dynamic NMR microscopy. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2012; 221:11-18. [PMID: 22743537 DOI: 10.1016/j.jmr.2012.05.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Revised: 05/07/2012] [Accepted: 05/10/2012] [Indexed: 06/01/2023]
Abstract
Microscopic capsules made from polysaccharides are used as carriers for drugs and food additives. Here, we use NMR microscopy to assess the permeability of capsule membranes and their stability under different environmental conditions. The results allow us to determine the suitability of different capsules for controlled drug delivery. As a measure of the membrane permeability, we monitor the diffusion of paramagnetic molecules into the microcapsules by dynamic NMR microimaging. We obtained the diffusion coefficients of the probe molecules in the membranes and in the capsule core by comparing the measured time dependent concentration maps with numerical solutions of the diffusion equation. The results reveal that external coatings strongly decrease the permeability of the capsules. In addition, we also visualized that the capsules are stable under gastric conditions but dissolve under simulated colonic conditions, as required for targeted drug delivery. Depending on the capsule, the timescales for these processes range from 1 to 28 h.
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Affiliation(s)
- Stefan Henning
- Experimental Physics III, TU Dortmund University, 44227 Dortmund, Germany.
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Henning S, Leick S, Kott M, Rehage H, Suter D. Sealing liquid-filled pectinate capsules with a shellac coating. J Microencapsul 2011; 29:147-55. [DOI: 10.3109/02652048.2011.635220] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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