Polycaprolactone/mesoporous silica MCM-41 composites prepared by in situ polymerization--颗粒学报PARTICUOLOGY

Lopez-Figueras, L., Navascues, N., & Irusta, S. (2017). Polycaprolactone/mesoporous silica MCM-41 composites prepared by in situ polymerization. Particuology, 30, 135-143. https://doi.org/10.1016/j.partic.2016.05.005

Polycaprolactone/mesoporous silica MCM-41 composites prepared by in situ polymerization

Laura Lopez-Figueras ^a, Nuria Navascues ^a, Silvia Irusta ^{a b *}

a Department of Chemical Engineering, Nanoscience Institute of Aragon (INA), University of Zaragoza, 50018 Zaragoza, Spain
b Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, 50018 Zaragoza, Spain

10.1016/j.partic.2016.05.005

Volume 30, February 2017, Pages 135-143

Received 10 February 2016, Revised 11 May 2016, Accepted 15 May 2016, Available online 25 August 2016, Version of Record 27 January 2017.

E-mail: sirusta@unizar.es

Highlights

• Composites of PCL/MCM-41 and EPTES-functionalized MCM-41 were prepared by in situ polymerization.

• Different behaviour was observed for PCL composites prepared with MCM-41 and EPTES/MCM-41.

• EPTES/MCM-41 loadings of >2 wt% increased the temperature of maximum degradation rate by 55 °C.

• Improvement in PCL properties resulted from good interaction between filler and PCL matrix.

Abstract

Composites of polycaprolactone (PCL) with mesoporous silica MCM-41 and N-[3-(trimethoxysilyl)propyl]-ethylenediamine (EPTES)-functionalized MCM-41 (EPTES/MCM-41) were prepared by in situ polymerization. The thermal properties of the composites were characterized by thermogravimetric analysis. There was an increase in the thermal decomposition temperature of PCL by more than 55 °C, when the EPTES/MCM-41 loading was higher than 2 wt%. Tensile test results indicated that adding MCM-41 increased the brittleness of the PCL matrix, while adding 8 wt% of EPTES/MCM-41 increased the Young's modulus by 26%. Incorporating MCM-41 increased the crystallinity of the resulting PCL composite, compared with that of PCL. Incorporating up to 5 wt% EPTES/MCM-41 slightly reduced the crystallinity of PCL. The different effects of MCM-41 and EPTES/MCM-41 on the composite reflected the degree of interaction and dispersion of the silica filler in the polymer matrix, as evidenced by results from transmission electron microscopy and atomic force microscopy.

Graphical abstract

Keywords

Nanocomposite; Mesoporous silica; Polycaprolactone

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