Thesis Type: Doctorate
Institution Of The Thesis: Marmara University, Institute For Graduate Studies İn Pure And Applied Sciences, Department Oftextile Engineering, Turkey
Approval Date: 2021
Thesis Language: Turkish
Student: Elif Gözde Saraç
Principal Consultant (For Co-Consultant Theses): Erhan Öner
Co-Consultant: Memet Vezir Kahraman
Abstract:
DEVELOPMENT OF THERMO-REGULATING
SMART TEXTILES AND INVESTIGATION OF THEIR PERFORMANCE PROPERTIES
Phase change materials
(PCMs) are smart materials which can respond to ambient temperature. They
provide cooling or heating by absorbing or releasing the heat that they store
during phase change. This feature makes PCMs to be used in thermal energy storage
systems, building materials, solar systems, thermal management of electronics
and in functional textiles such as space textiles, protective textiles and home
textiles. Research studies on novel materials and their application methods to
textiles have been progressing.
In this thesis work,
bio-based coconut oil and its blend with n-octadecane which have high heat
storage capacity were utilized in textiles as PCM for thermo-regulation. The
core PCM was microencapsulated using various shell materials and encapsulation
methods, then implemented to woven and nonwoven textiles.
Organic coconut oil and
its blend with n-octadecane were used as the core; melamine formaldehyde,
methyl methacrylate, hydroxyethyl methacrylate, glycidyl methacrylate, sodium
alginate and gelatin were used as shell materials in the developed
microcapsules. The microcapsules were
synthesized by in-situ, suspension, emulsion polymerization and coacervation
methods. They were characterized by DSC, FT-IR, TGA and SEM analyses. The
microcapsules, which were found to be applicable to textiles, were implemented
to cotton and cotton-elastane woven fabrics by coating, padding and exhaustion
methods; to nonwoven textiles by coating and composite applications. The
treated fabrics were examined by DSC and SEM analyses to determine their
properties of thermal energy storage, durability to washing and morphology.
Tear strength, air permeability and thermographic temperatures of untreated and
treated fabrics were also assessed.