Flame Retardant Effect of Ionic Liquid Capsules on Emulsion Paint

With the widespread use of fire retardants in domestic settings, the safety and environmental concerns associated with traditional halogenated flame retardants began to surface in public, so there is a need for alternative flame retardants that can fill the same role without posing a threat to human health safety and the environment. Ionic liquids have recently gained attention in the academic world, as it is a novel “green” solvent that is non-volatile, non-flammable, chemically inert, and designable, thus they can be applied to various field. It also has the potential to be used as a flame retardant. Ionic liquid (IL) as a flame retardant (FR) additive can have great application in emulsion paint and coatings, however, the addition of IL into emulsion paint disturbs the emulsion stability and causes rapid demulsification. The objective of this research is to deliver IL into emulsion paint without causing immediate demulsification and imbuing the emulsion with FR capabilities. This thesis explores the potential to encapsulate IL within silica microcapsules using sol-gel chemistry in order to avoid demulsification, while the FR properties of IL will be drawn upon during a combustion scenario as capsules break in high temperatures. The products are characterized by techniques including Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and thermogravimetric analysis (TGA). Its flammability parameters are measured using micro combustion calorimetry (MCC). Results showed that the silica capsules successfully captured IL within their core and the IL can also be released during a fire. The weight percent of IL inside the capsule can reach 69.4%, and the pHHR reduction from adding IL capsules can reach up to 29.87%. The emulsion paint and capsules mixture can remain stable for 24 h before showing obvious signs of demulsification.

Name thesis:degree_name

Master of Science

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Safety Engineering

Grantor

Texas A&M University

Year dc:date.issued

2022

Author dc:creator

• Wu, Bingqian

Advisor dc:contributor.advisor

• Qang, Qingsheng

Committee members dc:contributor.committeemember

• Tu, Qing
• Djire, Abdoulaye

• Engineering, Materials Science
• Engineering, Chemical

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/1969.1/1595947

OAI record oai:identifier

https://oaktrust.library.tamu.edu/server/oai/request?verb=GetRecord&metadataPrefix=dim&identifier=oai%3Aoaktrust.library.tamu.edu%3A1969.1%2F1595947