Influence of in vitro degradation of a biodegradable nanocomposite on its shape memory effect
Abstract
Preparation and in vitro degradation of shape memory nanocomposites consisting of cross-linked poly(ε-caprolactone) (c-PCL) and Fe 3 O 4 nanoparticles were investigated in this study. The degradation behaviors were evaluated from the decrease of mechanical property, weight, and molecular weight of polymer, the change of pH value of phosphate-buffered saline (PBS), and morphological changes in composites. The results from gel fraction and molecular weight analysis indicated some damages were brought to chemical networks of c-PCL, but its linear molecule configuration received less impact from PBS degradation medium. Expectedly, the negative influence of the in vitro degradation on shape memory effect had been observed. All these physical and chemical properties related to degradation had been tested to analyze degradation behaviors, which were further used to explain the changes in shape memory recovery. Furthermore, on the basis of the degradation results, the mechanism of c-PCL degradation was also put forward to illustrate the effect of degradation on shape memory. This research will supply a guideline for effectively using and preserving biodegradable shape memory composites.
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Linear crosslinked PCL thermo- and magnetic sensitive materials were reported.
“In the literature linear crosslinked PCL thermo- and magnetic sensitive materials were reported [159,160].”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [159]
The materials degree of degradation was accelerated with the addition of the Fe3O4.
“Of interest was the materials degree of degradation, which was accelerated with the addition of the Fe3O4.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [159]
This effect was explained by the hydrophilic nature of the NPs promoting the hydrolysis of the polymer ester bonds.
“This effect was explained by the hydrophilic nature of the NPs promoting the hydrolysis of the polymer ester bonds.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [159]
As a consequence, the SMP permanent domain was damaged and the SME performance decreased.
“As a consequence SMP permanent domain was damaged and the SME performance decreased.”
From Shape-memory polymers for multiple applications in the materials world (2016) · cites this paper as [159]
Shape recovery ratio of samples containing 15 wt% Fe3O4 decreased from 75% before degradation to 20% in 12th week; dropped by about 35% for 5 wt% Fe3O4 and by about 25% for pristine material.
“the shape recovery ratio of samples containing 15 wt% Fe 3 O 4 decreased from 75% before degradation to 20% in the 12th week.At the same time, the shape recovery ratio dropped by about 35% for samples loaded with 5 wt% Fe 3 O 4 and by about 25% for pristine material.”
From Review on the Functional Determinants and Durability of Shape Memory Polymers (2010) · cites this paper as [233]
In cross-linked PCL/Fe3O4 nanocomposites, degradation at 37 °C in PBS caused progressively weaker shape recoverabilities with increasing filler fractions.
“Due to degradation at 37 °C in PBS, their specimens revealed progressively weaker shape recoverabilities in static tensile tests with increasing filler fractions.”
From Review on the Functional Determinants and Durability of Shape Memory Polymers (2010) · cites this paper as [233]
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- Authors
- Yu, X., Zhou, S., Zheng, X., Xiao, Y., & Guo, T.
- Affiliations
- Southwest Jiaotong University (CN)
- Corresponding author
- Zhou, Shaobing
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2009-09-17
- Volume
- 113
- Issue
- 41
- Pages
- 17630-17635
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2001555891
- Cited by
- 38
- References
- 32
- Citations by year
- 2025: 1 · 2024: 1 · 2021: 2 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 3 · 2016: 7 · 2015: 3 · 2014: 3 · 2013: 2 · 2012: 2
- FWCI
- 2.81
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Journal of Physical Chemistry C (publishedVersion)
- Topics
- Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
- Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
- Physical Sciences › Engineering › Mechanical Engineering › Advanced Materials and Mechanics
- Keywords
- shape memory effect, polycaprolactone, Fe3O4 nanoparticles, biodegradable nanocomposites, in vitro degradation, polymer networks, gel content, molecular weight degradation, degradation mechanism, magnetic nanoparticles
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