Abstract
Shape memory polymers are stimuli-responsive materials able to adaptively store a temporary (deformed) shape and recover a 'memorized' permanent shape under an external stimulus. In shape-memory polymers, changes in shape are mostly induced by heating, and exceeding a specific switching temperature, Tswitch. If polymers cannot be warmed up by heat transfer using a hot liquid or gaseous medium, noncontact triggering will be required. In this article, the magnetically induced shape-memory effect of composites from NdFeB magnetic particles and crosslinked low density polyethylene (XLDPE) shape memory nanocomposite containing 2 wt% nanoclay is introduced. Various amounts of NdFeB particles (5, 15, 40 wt %) were added to the nanocomposite. Electromagnetically triggered shape memory properties of the formed composites were conducted using an alternative magnetic field with a frequency of 9 kHz and strength of 15 kW. The shape recovery of samples was possible by inductive heating and the shape recovery rates comparable to those obtained by conventional heating methods were demonstrated. It was concluded that the maximum heat generation achievable by inductive heating in the alternative magnetic field depends on magnetic particle content. The sample containing 15wt% NdFeB reached a full shape recovery of 25% extension within 6 minutes remaining in the magnetic field.
| Language | English |
|---|---|
| Title of host publication | Multi-Functional Materials and Structures III |
| Pages | 999-1002 |
| Number of pages | 4 |
| DOIs | |
| Publication status | Published - 1 Dec 2010 |
| Event | 3rd International Conference on Multi-Functional Materials and Structures, MFMS 2010 - Jeonju, Korea, Republic of Duration: 14 Sep 2010 → 18 Sep 2010 |
Publication series
| Name | Advanced Materials Research |
|---|---|
| Volume | 123-125 |
| ISSN (Print) | 1022-6680 |
Conference
| Conference | 3rd International Conference on Multi-Functional Materials and Structures, MFMS 2010 |
|---|---|
| Country | Korea, Republic of |
| City | Jeonju |
| Period | 14/09/10 → 18/09/10 |
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Keywords
- Alternative magnetic field
- Heat induction
- Magnetic particles
- NdFeB
- Shape memory nanocomposites
- XLDPE
Cite this
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Magnetic field actuation of shape memory nanocomposites. / Golbang, Atefeh; Kokabi, Mehrdad.
Multi-Functional Materials and Structures III. 2010. p. 999-1002 (Advanced Materials Research; Vol. 123-125).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Magnetic field actuation of shape memory nanocomposites
AU - Golbang, Atefeh
AU - Kokabi, Mehrdad
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Shape memory polymers are stimuli-responsive materials able to adaptively store a temporary (deformed) shape and recover a 'memorized' permanent shape under an external stimulus. In shape-memory polymers, changes in shape are mostly induced by heating, and exceeding a specific switching temperature, Tswitch. If polymers cannot be warmed up by heat transfer using a hot liquid or gaseous medium, noncontact triggering will be required. In this article, the magnetically induced shape-memory effect of composites from NdFeB magnetic particles and crosslinked low density polyethylene (XLDPE) shape memory nanocomposite containing 2 wt% nanoclay is introduced. Various amounts of NdFeB particles (5, 15, 40 wt %) were added to the nanocomposite. Electromagnetically triggered shape memory properties of the formed composites were conducted using an alternative magnetic field with a frequency of 9 kHz and strength of 15 kW. The shape recovery of samples was possible by inductive heating and the shape recovery rates comparable to those obtained by conventional heating methods were demonstrated. It was concluded that the maximum heat generation achievable by inductive heating in the alternative magnetic field depends on magnetic particle content. The sample containing 15wt% NdFeB reached a full shape recovery of 25% extension within 6 minutes remaining in the magnetic field.
AB - Shape memory polymers are stimuli-responsive materials able to adaptively store a temporary (deformed) shape and recover a 'memorized' permanent shape under an external stimulus. In shape-memory polymers, changes in shape are mostly induced by heating, and exceeding a specific switching temperature, Tswitch. If polymers cannot be warmed up by heat transfer using a hot liquid or gaseous medium, noncontact triggering will be required. In this article, the magnetically induced shape-memory effect of composites from NdFeB magnetic particles and crosslinked low density polyethylene (XLDPE) shape memory nanocomposite containing 2 wt% nanoclay is introduced. Various amounts of NdFeB particles (5, 15, 40 wt %) were added to the nanocomposite. Electromagnetically triggered shape memory properties of the formed composites were conducted using an alternative magnetic field with a frequency of 9 kHz and strength of 15 kW. The shape recovery of samples was possible by inductive heating and the shape recovery rates comparable to those obtained by conventional heating methods were demonstrated. It was concluded that the maximum heat generation achievable by inductive heating in the alternative magnetic field depends on magnetic particle content. The sample containing 15wt% NdFeB reached a full shape recovery of 25% extension within 6 minutes remaining in the magnetic field.
KW - Alternative magnetic field
KW - Heat induction
KW - Magnetic particles
KW - NdFeB
KW - Shape memory nanocomposites
KW - XLDPE
UR - http://www.scopus.com/inward/record.url?scp=78650743478&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.123-125.999
DO - 10.4028/www.scientific.net/AMR.123-125.999
M3 - Conference contribution
SN - 9780878492466
T3 - Advanced Materials Research
SP - 999
EP - 1002
BT - Multi-Functional Materials and Structures III
ER -