Highly stiff yet elastic microcapsules incorporating cellulose nanofibrils
| Autor: | Michael Loewenberg, Rostislav Boltyanskiy, Siamak Nejati, Shomeek Mukhopadhyay, Yekaterina Rokhlenko, Gilad Kaufman, Chinedum O. Osuji, Youngwoo Choo |
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| Rok vydání: | 2017 |
| Předmět: |
Chemical Physics
Materials science Polyacrylic acid Microfluidics technology industry and agriculture Cationic polymerization Modulus 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound 02 Physical Sciences 03 Chemical Sciences 09 Engineering chemistry Copolymer Cellulose Elasticity (economics) Composite material 0210 nano-technology Elastic modulus |
| Zdroj: | Soft Matter. 13:2733-2737 |
| ISSN: | 1744-6848 1744-683X |
| DOI: | 10.1039/c7sm00092h |
| Popis: | Microcapsules with high mechanical stability and elasticity are desirable in a variety of contexts. We report a single-step method to fabricate such microcapsules by microfluidic interfacial complexation between high stiffness cellulose nanofibrils (CNF) and an oil-soluble cationic random copolymer. Single-capsule compression measurements reveal an elastic modulus of 53 MPa for the CNF-based capsule shell with complete recovery of deformation from strains as large as 19%. We demonstrate the ability to manipulate the shell modulus by the use of polyacrylic acid (PAA) as a binder material, and observe a direct relationship between the shell modulus and the PAA concentration, with moduli as large as 0.5 GPa attained. These results demonstrate that CNF incorporation provides a facile route for producing strong yet flexible microcapsule shells. |
| Databáze: | OpenAIRE |
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