Article
Chemistry, Multidisciplinary
Sangmin Lee, Wahyu Martumpal Hamonangan, Jong Hyun Kim, Shin-Hyun Kim
Summary: Hydrogel-shelled microcapsules with double-network (DN) shells have been developed for improved mechanical stability and high molecular size-selective permeation. The DN shells are prepared using a triple-emulsion template and exhibit enhanced elasticity and resistance to shear flows compared to single-network (SN) shells. This study demonstrates the potential of DN microcapsules for various applications requiring high mechanical stability.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Polymer Science
Xuehui Gong, Peipei Yang, Kristen Rohm, Yi Zhong, Boran Zhao, Ica Manas-Zloczower, Harihara Baskaran, Donald L. Feke
Summary: The technique of fabricating hollow fibers with porous walls using high internal phase emulsions (HIPEs) as templates offers an environmentally friendly alternative to conventional methods. This method allows for control over the hollow structures of polyHIPE fibers, producing porous fibers with a hollow core and potential applications in drug release studies and size-selective loading and separation of materials.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Applied
Zhiyao Yan, Wanxia Huang, Xiongrui Jiang, Junzheng Gao, Yiwen Hu, Hengzhong Zhang, Qiwu Shi
Summary: This study proposed the design of microporous hollow structure in black TiO2 with thickness-controllable nano-shells to optimize its photocatalytic ability, showing excellent light absorption and enhanced photocatalysis performance with decreased shell thickness. The photocatalytic efficiency of the 20-nm shells was about 8 times higher than that of the 145-nm shells, indicating the strong promotion effect of the nano-shell design on the photocatalytic activity of hollow black TiO2.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jessica Ann O'Callaghan, Daeyeon Lee, Daniel A. Hammer
Summary: This study demonstrates the generation of enzyme-powered microcapsules using droplet microfluidics. By functionalizing the surfaces of the microcapsules with enzyme urease, their motion can be actively driven. The research also explores the role of different surfactants and surface roughness in enhancing the motion of these microcapsules.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Minh Vuong Phan, Thi Kim Thoa Tran, Quynh Nhu Pham, Manh Huy Do, Thi Hong No Nguyen, Minh Ty Nguyen, Thanh Thao Phan, Thi Xuan Hang To
Summary: This research presents a facile method for synthesizing hollowsilica nanoparticles (HSN) using sodium silicate as the silica precursor without surfactants. The resulting HSN has a mesopore-free silica shell and adjustable diameter ranging from 50 to 200 nm. The prepared HSNs have low thermal conductivity and high reflectance, making them promising for use in reflective and thermally insulating coatings.
Article
Polymer Science
Meng Liu, Dan Zhao, Hui Lv, Yunjing Liang, Yannan Yang, Zongguo Hong, Jingxue Liu, Kang Dai, Xincai Xiao
Summary: In this paper, we present the fabrication of microcapsules embedded with PNIPAN in P(TPC-EDA) shells. These microcapsules exhibit an interpenetrating polymer network (IPN) structure, enabling rapid penetration of oily substances at specific temperatures, and they possess high uniformity and reproducibility in size. The microcapsules were synthesized through a three-step process involving the optimization of oil-in-water emulsion preparation using a microfluidic device, interfacial polymerization for the formation of monodisperse P(TPC-EDA) microcapsules, and the subsequent free radical polymerization to introduce a poly(N-isopropylacrylamide) (PNIPAM)-based IPN structure in the P(TPC-EDA) shells. Our data analysis on the size of emulsions prepared by microfluidics offers an intuitive functional relationship, which is rarely observed in other literature. The swelling experiments demonstrated that the IPN-structured system exhibited the highest adsorption capacity for kerosene after 6 hours, thus showing promise for water-oil separation or the extraction and separation of hydrophobic drugs. Moreover, due to the use of microfluidic technology, the resulting microcapsules possess excellent monodispersity and are highly suitable for large-scale production in industry.
Article
Nanoscience & Nanotechnology
Thomas W. Cowell, Andrew Dobria, Hee-Sun Han
Summary: This study demonstrates that double emulsion (DE) drops can address the instability issue of single emulsion (SE) drops and prevent content mixing. A simple DE drop maker is also developed, allowing for the production of single-core DEs at various flow rates and better control over shell thickness. DE drops show excellent stability during thermal cycling and maintain the monodispersity throughout the workflow. DE drops have advantages for multistep reactions due to their resistance to content mixing.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Agriculture, Multidisciplinary
Phui Yee Tan, Tai Boon Tan, Hon Weng Chang, William W. Mwangi, Beng Ti Tey, Eng Seng Chan, Oi Ming Lai, Yuanfa Liu, Yong Wang, Chin Ping Tan
Summary: Over the past decade, Pickering emulsion has been increasingly used for encapsulating bioactive compounds due to its high stability and biocompatibility. In this study, palm tocotrienols were encapsulated in a calcium carbonate Pickering emulsion, followed by alginate gelation and chitosan coating. The addition of chitosan improved the stability of microcapsules, resulting in increased encapsulation efficiency. The optimized parameters led to high encapsulation efficiency and enhanced oil loading efficiency for potential delivery of palm tocotrienols.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2021)
Article
Chemistry, Applied
Min Li, Xianlin Fan, Qian Mao, Qing Li, Xiujuan Zhang, Gaohong He, Shufen Zhang, Wenjun Zhang
Summary: Fe@CH microcapsules, with enhanced phosphate binding and limited iron leakage, are a proper candidate as the phosphate binder for hyperphosphatemia patients due to their improved bio-compatibility and binding efficacy.
CARBOHYDRATE POLYMERS
(2021)
Article
Materials Science, Paper & Wood
Kunlin Chen, Yezhou Ni, Xuan Shi, Zhenhua Jia, Hua Qiu, Giuseppe Portale
Summary: This study successfully synthesized environmentally friendly chitosan microcapsules derived from plants using a green synthesis method. The microcapsules have the advantages of being eco-friendly, safe, and having controlled release capabilities. The method also allows for the creation of functional fabric coatings with slow-release, skincare, and antibacterial properties.
Article
Chemistry, Applied
Xudong Li, Xiaoyun Li, Yuhua Zhao, Qifeng Li, Junwei Wang, Maoqing Kang
Summary: Isophorone diisocyanate (IPDI) microcapsules with silica/polyurea hybrid shells were successfully synthesized using interfacial and in situ polymerization. These microcapsules exhibited excellent thermal stability and scratch self-healing properties when incorporated into epoxy resin coatings.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Biochemistry & Molecular Biology
Lourembam Monika Devi, Amit Baran Das, Laxmikant S. Badwaik
Summary: The aim of this study was to develop a stable microencapsulated anthocyanin using double emulsion complex coacervation technique from black rice bran. Nine microcapsule formulations were prepared using gelatin, acacia gum, and anthocyanin at different ratios and concentrations. The obtained microcapsules were evaluated for their physicochemical properties, morphology, spectroscopy, thermal behavior, and stability. The results showed high encapsulation efficiency and stable properties of the microcapsules, indicating their potential as a source for stable nutraceuticals.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Review
Chemistry, Multidisciplinary
Zhao Li, Ke Xu, Linlin Qin, Decai Zhao, Nailiang Yang, Dan Wang, Yang Yang
Summary: Hollow multi-shelled structures (HoMSs) are a new class of nanoplatforms with high loading capacity and sequential drug release, making them promising drug delivery systems (DDSs) for clinical applications. This review summarizes the latest research progress of HoMS-based DDSs for small molecular drugs and macromolecular drugs, highlighting their characteristics, drug categories, and future research prospects.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Applied
Shengchang Zhang, Fabien Salaun, Pengqing Liu, Christine Campagne
Summary: In this study, an integrated process was used to optimize functional microcapsules and achieve non-destructive adhesion on textile surfaces, eliminating the use of binders and realizing green and efficient production.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Polymer Science
Bishnu Prasad Bastakoti, Nischal Bhattarai, Moses D. Ashie, Felix Tettey, Shin-ichi Yusa, Kenichi Nakashima
Summary: A laboratory-synthesized triblock copolymer was used as a template to synthesize hollow BaCO3 nanoparticles. The formation of spherical micelles with a PEG corona, PAA shell, and PS core in an aqueous solution was confirmed. The controlled precipitation of BaCO3 around the polymeric micelles allowed for the synthesis of hollow BC-NPs with specific properties.
