Self cleaning TiO2 coating on polycarbonate: Surface treatment, photocatalytic and nanomechanical properties

Yaghoubi, Houman; Taghavinia, Nima; Alamdari, Eskandar Keshavarz

doi:10.1016/j.surfcoat.2009.09.085

Cited by 160 publications

(98 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[10], and no much effort has been made in the published literature related to effect of multiple reaction parameters and durability and mechanical strength of obtained photocatalyticinfrastructure materials [22]. Titania coatings are generally layers of around 200 nm of thickness [23], which are deposited using some techniques, such as sputtering [24], electrophoretic deposition [25], spray pyrolysis [26], thermal oxidation [27], chemical vapor deposition [28] and wet coating [29], among the main reported methodologies.…”

Section: Introductionmentioning

confidence: 99%

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

a b s t r a c tAn increasingly known application of nanomaterials in the construction industry is related to the photoactivity ability of semiconductors, where nano-anatase TiO 2 is perhaps the most well-known photocatalytic semiconductor and one which possesses a strong oxidizing capability. To analyze the photo-efficiency of four TiO 2 coatings and the effect of SiO 2 interlayer on the mechanic and photocatalytic activity in Rhodamine B (RhB) and NO x photodegradation, two photocatalytic cement series have been prepared. First, cement mortar was coated with three commercial TiO 2 suspensions (GG1, GC7 and CG13) and a home-made titania sol-gel (TEA), and secondly an insertion of a SiO 2 layer was applied on cement surface before spraying the TiO 2 layer.All studied TiO 2 -cements exhibited a significant RhB and NO x photodegradation, arising almost total RhB molar conversions, and upper 53% for NO x photo-oxidation respectively. Nevertheless, although SiO 2 layer deposited in between mortar and TiO 2 -cement did not stabilize the commercial TiO 2 coatings, a good adhesion was observed when silica was applied joint to the home-made titania gel (TEA), probably as a consequence of the interactions encountered between SiO 2 and TiO 2 gels. CG7-Si-Cem exhibited high rate at shorter irradiation times, but TEA-Cem and TEA-Si-Cem can be considered as very interesting and potential photocatalytic mortars due to useful mechanical properties, with a very good coatings adhesion that provides promising outdoor use, and good photo-efficiencies in RhB and NO x photo-oxidation.

show abstract

Section: Introductionmentioning

confidence: 99%

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

show abstract

“…이러한 단점들을 보완하기 위하여 열 표면처리, 화학적 표면처리, 전기화학적 표면처 리, 플라즈마 표면처리, 표면 박막 코팅 및 커플링제 처리 등과 같은 표면처리 공정들이 개선방법으로 제시되었다 [6,7]. 광 분해시키며 표면의 친수화로 오염물이 빗물 등에 의해 쉽게 세정 될 수 있음이 확인되었다 [5,11,12] …”

Section: )unclassified

Improvement of Polycarbonate Properties by Coating of TiO₂and SiO₂Thin Film

Won¹,

Lee

2014

Applied Chemistry for Engineering

View full text Add to dashboard Cite

폴리카보네이트의 표면에 무기계 SiO2 박막을 바인더로 코팅한 후 광촉매 특성을 갖는 TiO2 박막을 추가로 형성하여 모재의 특성을 향상시키는 연구가 수행되었다. 바인더로 사용되는 SiO2 박막은 광투과 특성이 우수하며, 상압플라즈 마처리를 통한 친수성의 증가로 TiO2 함유 수용액의 도포성을 향상시켜 균일한 박막을 형성시킬 수 있었다. 약 200 nm 이상으로 코팅된 TiO2 박막은 180∼400 nm의 자외선을 차단하여 폴리카보네이트의 황변현상을 억제하고 내열성을 크게 향상하는데 기여하였다. 최외층에 형성된 TiO2 박막은 자외선의 흡수로 활성화되는 표면산화특성으로 유기 오염 물의 분해반응 촉진과 표면의 친수성의 증가에 따른 자기세정특성을 나타내었다. TiO2 박막과 폴리카보네이트 기재 사이에 SiO2 박막의 적용은 기재의 부식에 의한 코팅된 TiO2 층의 박리를 억제하여 구조 안정성을 유지할 수 있었다.The property improvement of polycarbonate coated with a multilayer film composed of an inorganic SiO2 film and a photocatalytic TiO2 film was studied. The SiO2 film as a binder had an excellent light transmission characteristic. After the treatment with atmospheric pressure plasma, the surface of SiO2 film showed the hydrophilicity, which increased the film coating uniformity with a TiO2-containing aqueous solution. When TiO2 film was over 200 nm thick, the absorption effect of UV rays in the range of 180∼400 nm suppressed the yellowing phenomena of polycarbonate substrate. The inorganic film improved the heat resistance of polycarbonate substrates. TiO2 film in the outmost under the exposure of UV rays promotes the catalytic oxidation characteristics and yields the capability to the decomposition of organic contaminants, and also increases the self-cleaning properties due to the increase of hydrophilicity. Structural stability of the polycarbonate substrate coated with inorganic TiO2 and SiO2 film was shown. The role of SiO2 film between TiO2 and polycarbonate substrate suppressed the peeling of TiO2 film by inhibiting the photocatalytic oxidation effect of TiO2 film on the polycarbonate substrate. Keywords

show abstract

“…Houman et al [10] prepared self-cleaning coating from TiO 2 on polycarbonate surface by using dip coating process and treating the surface with chemical solution to obtain hydrophilic groups on surface in ultrasonic device and washing then with DI. The results showed improvement in mechanical properties after coating included increases in hardness in about 2.5 time and scratch resistance increases in about 6.4 time then PC substrates.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Addition Titanium Dioxide on General Properties of Polycarbonate

Saad¹,

Jwad²

2018

OALib

View full text Add to dashboard Cite

Polycarbonate is a transparent commercial engineering polymer used in many applications especially in mobile protector screen for its good properties. In the present paper, nano composite material composed of polycarbonate sheet and nano titanium dioxide particles was prepared. Three ratios of TiO 2 (0.01-0.03-0.05 g) were employed with polycarbonate by using pressing technique. Different mechanical, chemical, thermal and morphology tests were characterized as hardness, impact, FTIR, UV,XRD, DSC, tensile strength, contact angle and smoothness test. The results were shown that the hardness decreased in about 15% and the impact resistance increased in about 10% with TiO 2 level increasing. FTIR showed there were no new peaks appearing and that indicated physical interactions between the nano filler and the polycarbonate matrix, also transparency reduced in about 5%. UV showed the absorption of polycarbonate to radiation after added TiO 2 . DSC showed decreasing in the Tg level and increasing in the crystallinity of material after processing. Contact angle test showed that the wettability increased at first but retained decreasing with adding more TiO 2 to the surface. Surface roughness test and AFM test show decrease in smoothness with adding TiO 2 to polycarbonate sheet. Subject AreasMechanical Engineering

show abstract

Self cleaning TiO2 coating on polycarbonate: Surface treatment, photocatalytic and nanomechanical properties

Cited by 160 publications

References 46 publications

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Improvement of Polycarbonate Properties by Coating of TiO₂and SiO₂Thin Film

Investigation of Addition Titanium Dioxide on General Properties of Polycarbonate

Contact Info

Product

Resources

About

Self cleaning TiO2 coating on polycarbonate: Surface treatment, photocatalytic and nanomechanical properties

Cited by 160 publications

References 46 publications

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Improvement of Polycarbonate Properties by Coating of TiO2and SiO2Thin Film

Investigation of Addition Titanium Dioxide on General Properties of Polycarbonate

Contact Info

Product

Resources

About

Improvement of Polycarbonate Properties by Coating of TiO₂and SiO₂Thin Film