In this study, Synthesis of nano-composite materials and their applications technologies for polyester fiber were studied. In chapter 1, The preparations of deodorizing and UV protecting fibers using TiO2 nanosol have been investigated. The TiO2 ...

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https://www.riss.kr/link?id=T12342242
대구 : 경북대학교 대학원, 2011
2011
한국어
677.474 판사항(22)
대구
xv. 225 p. : 삽화, 도표 ; 26 cm
참고문헌: p. 204-216
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
In this study, Synthesis of nano-composite materials and their applications technologies for polyester fiber were studied. In chapter 1, The preparations of deodorizing and UV protecting fibers using TiO2 nanosol have been investigated. The TiO2 ...
In this study, Synthesis of nano-composite materials and their applications technologies for polyester fiber were studied.
In chapter 1, The preparations of deodorizing and UV protecting fibers using TiO2 nanosol have been investigated. The TiO2 nanosol were made by sol-gel nano synthesis method, using TTIP as a precursor. According to the TTIP dosage, acid dosage, alkali dosage, agitation speed, nano sol synthesis was studied. In case of basic catalysts, 300nm-1000nm nano-sol were synthesized, while with acid catalyst, 50nm-230nm nano-sol was obtained. In case of using ammonia as a catalyst, with the amount of added ammonia, the size of nano-sol particles increased. In case of using nitric acid as a catalyst, with added nitric acid, particle size tended to decrease.
Deodorizing rate of polyester fibers increased with the concentration of applied TiO2 nano-sol. and UV protection of cotton fibers increased with concentration of applied TiO2 nano-sol. In washing tests, laundering durability over 20 times was observed. In addition, when TiO2 nano-sol treated on polyester, damage in tensile strength and tear strength of PET were negligible by the TiO2 nanosol treatment.
In chapter 2, Inorganic sols were made from TEOS by using sol-gel nano synthesis method. These nano-sols were successfully coated to polyester substrates transparent and durable superhydrophobic silica-surface at low temperature. In the coating of 5% o.w.s mixture solution of SiO2 dual nano sol(558.2nm : 965.4nm = 7 : 3) and UNIDYNE TG-5521 (SiO2 dual nano sol : UNIDYNE TG-5521 = 1 : 9) were used. The hydrophobic properties of the nano coatings were determined using contact-angle, FE-SEM and AFM measurements.
By the this dual scale nano structure on fiber surface, water contact angle increased to 150°, which is vary high value when compared with the contact angle 120°, when treated with fluorine water repellent only.
In chapter 3, For improved physical properties of water borne polyurethane coating layer, modified nano particles are incorporated to water borne polyurethane coating formation in stead of conventional micro-sized filler. Modified nano particle were made by using a novel technique for synthesis of silica nanostructures with flat plate shape. The synthetic method consisted of following main steps: the preparation of nano size template and the preparation silica coated template.
It successfully prepared that transparent durable WBPU-coating films and coating layers on polyester substrates at low temperatures. This films and coating layers were produced with 7% o.w.s coating solution a mixture of modified SiO2 nano sol(980nm) and WBPU. The properties of the nanocomposite coating films and layers were examined using tensile strength, elongation, water permeability, hydrostactic pressure, and FE-SEM measurements. In case of 0.30mm film prepared with mixture of WBPU and modified SiO2 nano sol, 62kgf/cm2 of the tensile strength and elongation at break of this film was 1.5 times high than that of WBPU film. which is much higher level than solvent-based PU films.
In chapter 4, SiO2 nano sols were synthesized by using sodium silicate instead of alkoxides or organo metallic compound of high cost. Particle size of SiO2 nano sols were controlled by the dosage of sodium silicate and hydrochloric acid. The properties of the SiO2 nano sols were characterized using particle analysis, elongation and TEM measurements. The lower the concentration of sodium silicate and hydrochloric acid, the smaller the sizes of silica particle and uniformity of particle size decreased. While, as the concentration of sodium silicate goes up higher than 50%, particles size and uniformity increased dramatically, because of cohesion. Synthesis of SiO2 nano sol by using sodium silicate is greatly affordable technology than using TEOS and could used in various textile functional finishing process.
In chapter 5, Composite nanoparticles composed of low molecular weight poly(vinyl alcohol) (LMW-PVA) and montmorillonite (MMT) were prepared using electrospraying technique by regulating PVA solution concentration. FE-SEM, TEM, FT-IR, XRD and TGA were utilized to characterize morphologies and properties the LMW-PVA/MMT composite nanoparticles. MMT particles were exfoliated and well distributed within the obtained composite nanoparticles. It was showed that PVA/MMT nanocomposite particles could be used for improve durability and heat resistance of polyester and nylon coating fabrics. PVA/MMT nanocomposites particles were readily prepared by electric spray.
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