Issue 35, 2014

N-Phenylaminomethyl hybrid silica, a better alternative to achieve reinforced PU nanocomposites

Abstract

A novel N-phenylaminomethyl silica (NPAM-silica) was firstly synthesized by the one-step emulsion polymerization of N-phenylaminomethyltriethoxysilane (ND-42). The hybrid silica could be dispersed in a variety of organic solvents including THF, acetone, DMF and DMAC. The NPAM-silica was mainly composed of fully condensed silsesquioxanes and a small quantity of partially condensed silsesquioxanes, which was confirmed by 29Si NMR and MALDI-TOF MS. GPC showed that the polydispersity of the NPAM-silica was 1.08. It was then introduced into polyurethane (PU) as a chemical cross-linker. The high reactivity of NPAM-silica was investigated by means of solid state Nuclear Magnetic Resonance (SSNMR). TEM and AFM showed that the NPAM-silica was nano-dispersed in the hard segments region of PU. The mechanical properties of the NPAM-silica/PU nanocomposites in the rubber state were enhanced when NPAM-silica was added, which was reflected in the DMA and tensile tests at constant TtestTg. It is also concluded that the increase of the modulus was derived from both the nanofiller contribution and entropic contribution which were tested by the temperature dependence of the modulus at the rubber region. NPAM-silica/PU possessed a higher storage modulus at the rubber plateau than that of N-phenylaminomethyl POSS/PU when the loading was below 26 wt%. The homogeneity of NPAM-silica/PU was better than that of N-phenylaminomethyl POSS/PU, which was characterized by TEM and small angle X-ray scattering (SAXS). The NPAM-silica showed greater advantages in practical applications compared with N-phenylaminomethyl POSS.

Graphical abstract: N-Phenylaminomethyl hybrid silica, a better alternative to achieve reinforced PU nanocomposites

Supplementary files

Article information

Article type
Paper
Submitted
18 Feb 2014
Accepted
25 Feb 2014
First published
25 Feb 2014

RSC Adv., 2014,4, 18146-18156

Author version available

N-Phenylaminomethyl hybrid silica, a better alternative to achieve reinforced PU nanocomposites

Q. Zhang, X. Huang, Z. Meng, X. Jia and K. Xi, RSC Adv., 2014, 4, 18146 DOI: 10.1039/C4RA01419G

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements