Mechanical properties and thermostability of polyimide/mesoporous silica nanocomposite via effectively using the pores

Abstract

Series of polyimide (PI)/mesoporous silica nanospheres (MSNs) nanocomposite films with different contents of MSNs were successfully prepared via a simple wet impregnation method. The morphologies, microstructures, mechanical properties, transmittance, and thermal properties of the prepared PI and the PI/MSNs nanocomposite films were investigated in detail. As a result, the thermal stability and mechanical performances of PI were obviously improved by incorporating MSNs into PI. The tensile stress and Young's modulus of the nanocomposite film with 5 wt % MSNs were raised up to 97.65 MPa and 2220.06 MPa, which are greatly higher than the values of 82.51 MPa and 1440.86 MPa for the pure PI film. Experimental results confirmed that the designed polymerization tactic, which occurred in the pores of the MSNs, facilitated to enhance the mechanical and physical performances of the PI/MSNs nanocomposite films, and definitely induced better integration between organic matrix and inorganic nanofillers. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 41173.

Polyimide/mesoporous silica nanocomposites: Characterization of mechanical and thermal properties and tribochemistry in dry sliding condition

“…Mesoporous materials benefit from two advantages including extremely high specific surface area (normally >500m 2 /g) and interconnected mesoporous structures. The former provides reaction interfaces for mesoporous materials and others, whereas the latter facilitates the penetration of polymeric molecules into particulates in the formation of much stronger physical or chemical bonding, as evidenced in [6][7][8][9]. Mesoporous silica reinforced PI composites, typically PI film composites, are of interest among research community.…”

Multifunctional mesoporous silica nanoparticles in poly(ethylene-co-vinyl acetate) for transparent heat retention films

“…Among the different types of silica additives, recently mesoporous silica nanoparticles (MSNs) have received much attention due to their nanosize, high surface‐to‐volume ratio, ordered structure, and ease for surface and nanopore functionalization . MSNs reinforced polymer composites are relatively new materials that have shown improved mechanical and thermal stabilities in polymers including polypropylene, polystyrene, polyimide, and PMMA . No reports have examined MSNs‐EVA nanocomposites, especially for applications in greenhouse coverings or PV encapsulants.…”

A multifunctional role of trialkylbenzenes for the preparation of aqueous colloidal mesostructured/mesoporous silica nanoparticles with controlled pore size, particle diameter, and morphology

“…[38][39][40][41][42][43][44][45][46] In particular, the control of pore size of MSN is quite important because it affects both the accessibility of in-coming guest molecules and the confinement effect of pores. [47][48][49][50][51][52][53][54] The control of particle diameter of MSN also has a great significance in terms of the uptake, cytotoxicity, and dispersity of MSN. [55][56][57][58][59][60][61][62][63][64] Thus, both the control of pore size and particle diameter of MSN is largely meaningful for the precise preparation of different types of MSN appropriate to various applications.…”