Imperial College London
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ProfessorJulianJones

Faculty of Engineering, Department of Materials

Professor of Biomaterials
 
 
 
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Contact

 

+44 (0)20 7594 6749julian.r.jones

 
 
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Location

 

207GoldsmithSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Verdolotti:2021:10.1016/j.compscitech.2021.108917,
author = {Verdolotti, L and Oliviero, M and Lavorgna, M and Santillo, C and Tallia, F and Iannace, S and Chen, S and Jones, JR},
doi = {10.1016/j.compscitech.2021.108917},
journal = {Composites Science and Technology},
pages = {1--9},
title = {“Aerogel-like” polysiloxane-polyurethane hybrid foams with enhanced mechanical and thermal-insulating properties},
url = {http://dx.doi.org/10.1016/j.compscitech.2021.108917},
volume = {213},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - New organic-inorganic polyurethane-based hybrids with enhanced mechanical properties and thermal insulation properties are reported. Polyurethane-based hybrids are characterized by the intimate interactions of their inorganic and organic co-networks and prepared by sol-gel approach, have exhibited properties exceeding those of polyurethane foams, e.g. enhanced thermal stability, durability and thermal insulating effectiveness. However, mechanical properties have previously been poor. Here, new porous organic-inorganic materials consisting of a polyurethane network modified by in-situ formation of aerogel-like polysiloxane domains, were developed. They exhibit a multiscale-porosity which enhances the insulation, mechanical and thermal properties. The synthesis was performed through a novel stepwise process consisting of: preparation of a siloxane precursor based on methyl-triethoxysilane and tetraethoxysilane; functionalization of traditional polyol for polyurethane foams with 3-(triethoxysilanepropyl)isocyanate as coupling agent; use of suitable catalysts and silicone surfactants; and foaming with methylene-di-isocyanate compound. The siloxane precursors and coupling agent led to formation of “aerogel-like” polysiloxane domains within the walls and struts of the polyurethane foams. The synthesis method enabled increased incorporation of the “aerogel-like” polysiloxane structures into the foams, compared to literature, with 20 wt% SiO2, reducing thermal conductivity of the hybrid foams 30% compared with pristine polyurethane, in addition to significant improvement in thermal stability and mechanical properties.
AU  - Verdolotti,L
AU  - Oliviero,M
AU  - Lavorgna,M
AU  - Santillo,C
AU  - Tallia,F
AU  - Iannace,S
AU  - Chen,S
AU  - Jones,JR
DO  - 10.1016/j.compscitech.2021.108917
EP  - 9
PY  - 2021///
SN  - 0266-3538
SP  - 1
TI  - “Aerogel-like” polysiloxane-polyurethane hybrid foams with enhanced mechanical and thermal-insulating properties
T2  - Composites Science and Technology
UR  - http://dx.doi.org/10.1016/j.compscitech.2021.108917
UR  - https://www.sciencedirect.com/science/article/pii/S0266353821002736?via%3Dihub
UR  - http://hdl.handle.net/10044/1/89512
VL  - 213
ER  -
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