NDLI: Effect of nanoparticles on the morphology and thermal properties of self-healing poly(urea-formaldehyde) microcapsules

Content Provider	Springer Nature Link
Author	Fereidoon, A. Ghorbanzadeh Ahangari, M. Jahanshahi, M.
Copyright Year	2013
Abstract	The preparation of microcapsules with adequate performance is required for the fabrication of self-healing composites. Self-healing microcapsules with improved morphology as well as thermal and water resistance were prepared by introducing either single-walled carbon nanotubes (SWCNTs) or aluminum oxide nanoparticles (nano-alumina) into a urea–formaldehyde resin (which acts as the wall material). The prepared microcapsules were studied using various characterization techniques, including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), optical microscopy (OM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and contact-angle measurements. Based on comparisons with traditional poly(urea–formaldehyde) microcapsules, the modified microcapsules exhibited a smoother surface. Our results indicate that the presence of the nanoparticles did not affect the core content of the microcapsules, which was approximately 78 wt.%. The average size of the traditional microcapsules was reduced from 168 μm to 115 and 95 μm for the SWCNT- and nano-alumina-modified microcapsules, respectively. In addition, the thermal resistance of the microcapsules was improved after modifying the capsule walls. After the microcapsules had been modified with SWCNTs, the water resistance of the capsules improved, and the contact angle increased from 44° to 50°.
Starting Page	1
Ending Page	8
Page Count	8
File Format	PDF
ISSN	10229760
Journal	Journal of Polymer Research
Volume Number	20
Issue Number	6
e-ISSN	15728935
Language	English
Publisher	Springer Netherlands
Publisher Date	2013-05-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Self-healing microcapsules Composite Nanoparticle Morphology Thermal resistance Polymer Sciences Industrial Chemistry/Chemical Engineering Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Materials Chemistry Polymers and Plastics

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