Open Access
ARTICLE
Bulk CO2-based Amorphous Triols Used for Designing Biocompatible Shape-Memory Polyurethanes
Shunjie Liu1,2, Yusheng Qin1,*, Xianhong Wang1,*, Fosong Wang1
1
Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022,
People’s Republic of China
2
University of Chinese Academy of Sciences, Beijing 100039, People’s Republic of China
* Corresponding Authors: ;
Journal of Renewable Materials 2015, 3(2), 101-112. https://doi.org/10.7569/JRM.2014.634140
Received 12 December 2014; Accepted 11 March 2015;
Abstract
Precursors with sharp crystalline transition temperature have attracted signifi cant attention in the fi eld of
shape-memory materials; however, seldom have reports been related to amorphous ones with industrial
application prospects. This study introduced a new family of amorphous CO
2
-based hydroxyl-telechelic
three-armed oligo(carbonate-ether) triol (Triol) with controllable molecular weight (M
n) and carbonate unit
content (CU), which was coupled with PEG and 1,6-hexamethylene diisocyanate (HDI) to afford crosslinked
polyurethanes (PU) networks with well-defi ned architecture. A crosslinking point was provided by Triol
and PEG was used to afford networks some crystallinity. The resulting networks were characterized using
attentuated total refl ectance Fourier transform infrared spectroscopy (ATR-FTIR) and differential scanning
calorimetry (DSC), and the shape-memory effect test provided insight into the relationship between shape
memory behaviors and polymeric structures. The networks displayed good dual-shape memory effect when
compared with others: shape fi xity ratio (R
f
) could be controlled by changing the Triol content and M
n' and
all the shape recovery ratios (R
r
) of the networks could unexpectedly approach 100% under the experimental
conditions. Interestingly, the substructure of the Triol CU, could effectively regulate the recovery time of
the networks, e.g., the recovery time decreased with the increment of Triol CU without changing R
f
and R
r
.
Besides, crystalline transition temperature could be simply changed by altering Triol content. A typical sample
Triol(2k, 50%)
40-PEG(6k)
60 displayed excellent dual-shape effect with almost 100% R
f
and R
r
at a recovery time
of 40 s at 70o
C. More interestingly, this sample could almost immediately recover its original shape (in less
than 3 s) when immersed in 70o
C water. Direct contact and MTT tests were used for assessment of cell viability
and proliferation. These results confi rmed the potential of these polyurethanes as a new family of tunable
biomedical shape-memory materials.
Keywords
Cite This Article
Liu, S., Qin, Y., Wang, X., Wang, F. (2015). Bulk CO
2-based Amorphous Triols Used for Designing Biocompatible Shape-Memory Polyurethanes.
Journal of Renewable Materials, 3(2), 101–112.