Tunable Adhesive Self-Cleaning Coating with Superhydrophobicity and Photocatalytic Activity

Superhydrophobic coatings with intelligent properties have attracted much attention because of their wide application in many fields. However, there is a limited amount of literature on superhydrophobic coatings whose wettability and adhesion can be adjusted by UV irradiation and calcination at the same time. In this study, amorphous SiO2 microspheres (A-SiO2) and nano-TiO2 particles (N-TiO2) were used to fabricate A-SiO2/N-TiO2 composites by wet grinding, and then, they were modified with polydimethylsiloxane (PDMS) and sprayed onto substrate surfaces to obtain a tunable adhesive superhydrophobic A-SiO2/N-TiO2@PDMS coating. It is worth noting that the wettability and adhesion of the coating to water droplets could be adjusted by UV irradiation and calcination. The mechanisms of the aforementioned phenomena were studied. Moreover, methyl orange solution could be degraded by the coating due to its photocatalysis. The as-prepared coating had good adaptation to different substrates and outdoor environments. Moreover, the surfaces of these coatings exhibited the same liquid repellency towards different droplets. This research provides an environmental strategy to prepare advanced self-cleaning coatings.

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Spraying Colloidal Nano TiO2 and Cross-linkable Polysiloxane onto Acrylic Carpet for Self-cleaning

Research Journal of Textile and Apparel ◽

10.1108/rjta-18-03-2014-b007 ◽

2014 ◽

Vol 18 (3) ◽

pp. 51-60

Author(s):

Ali Nazari ◽

Shahab Torabian ◽

Majid Montazer ◽

Mohammad Bameni Moghadam ◽

Mohammad Shahvaziyan

Keyword(s):

Uv Irradiation ◽

Ultra Violet ◽

Nano Tio2 ◽

Simple Method ◽

Photocatalytic Decolorization ◽

Washing Durability ◽

Self Cleaning ◽

Nano Titanium Dioxide ◽

Uv C ◽

Central Composite

In this study, self-cleaning properties are introduced to acrylic carpet through a simple method of spraying nano titanium dioxide (NTO) onto the carpet surface. A cross-linkable polysiloxane (PS) softener is also applied to enhance the washing durability, self-cleaning properties and handle softness. The self-cleaning properties of the acrylic carpet are investigated by using Solophenyl Red GBL as a synthetic dye and black mulberry as a natural dye to stain the carpet. The PS and NTO concentrations and the type of ultra violet (UV) irradiation are designed based on the statistical approach of a central composite design (CCD). UV irradiation is used under the form of daylight for 16 h, UV-A (400 W) for 1 h and UV-C (20 W) for 3 h. The photocatalytic decolorization values (ΔE*) of the treated carpet are measured and the optimized models are presented. The PS is capable of stabilizing the NTO particles on the surface of the acrylic carpet and helps to increase the washing durability. Also, the NTO particles can effectively photodegrade both the Solophenyl Red GBL and black mulberry dyes which act as the two coloring stains.

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Effect of Nano TiO2 on Self-cleaning Property of Cross-linking Cotton Fabric with Succinic Acid Under UV Irradiation

Photochemistry and Photobiology ◽

10.1111/j.1751-1097.2010.00756.x ◽

2010 ◽

Vol 86 (5) ◽

pp. 1030-1037 ◽

Cited By ~ 74

Author(s):

Loghman Karimi ◽

Mohammad Mirjalili ◽

Mohammad Esmail Yazdanshenas ◽

Ali Nazari

Keyword(s):

Succinic Acid ◽

Cotton Fabric ◽

Uv Irradiation ◽

Cross Linking ◽

Nano Tio2 ◽

Self Cleaning

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Hydrolytic Modification of SiO2 Microspheres with Na2SiO3 and the Performance of Supported Nano-TiO2 Composite Photocatalyst

Materials ◽

10.3390/ma14102553 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2553

Author(s):

Yu Tu ◽

Weihua Ao ◽

Chunhong Wang ◽

Tianyu Ren ◽

Lijuan Zhang ◽

...

Keyword(s):

Sol Gel ◽

Active Surface ◽

Hydroxyl Groups ◽

Nano Tio2 ◽

Amorphous Sio2 ◽

Composite Photocatalyst ◽

Sio2 Shell ◽

Functional Efficiency ◽

Sio2 Microspheres ◽

Better Than

Modified microspheres (SiO2-M) were obtained by the hydrolytic modification of silicon dioxide (SiO2) microspheres with Na2SiO3, and then, SiO2-M was used as a carrier to prepare a composite photocatalyst (SiO2-M/TiO2) using the sol-gel method; i.e., nano-TiO2 was loaded on the surface of SiO2-M. The structure, morphology, and photocatalytic properties of SiO2-M/TiO2 were investigated. Besides, the mechanism of the effect of SiO2-M was also explored. The results show that the hydrolytic modification of Na2SiO3 coated the surface of SiO2 microspheres with an amorphous SiO2 shell layer and increased the quantity of hydroxyl groups. The photocatalytic performance of the composite photocatalyst was slightly better than that of pure nano-TiO2 and significantly better than that of the composite photocatalyst supported by unmodified SiO2. Thus, increasing the loading capacity of nano-TiO2, improving the dispersion of TiO2, and increasing the active surface sites are essential factors for improving the functional efficiency of nano-TiO2. This work provides a new concept for the design of composite photocatalysts by optimizing the performance of the carrier.

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Nano-TiO2 coatings for cultural heritage protection: The role of the binder on hydrophobic and self-cleaning efficacy

Progress in Organic Coatings ◽

10.1016/j.porgcoat.2015.11.011 ◽

2016 ◽

Vol 91 ◽

pp. 1-8 ◽

Cited By ~ 57

Author(s):

Mauro F. La Russa ◽

Natalia Rovella ◽

Monica Alvarez de Buergo ◽

Cristina M. Belfiore ◽

Antonino Pezzino ◽

...

Keyword(s):

Cultural Heritage ◽

Nano Tio2 ◽

Heritage Protection ◽

Self Cleaning ◽

Tio2 Coatings ◽

Cleaning Efficacy

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Facile spraying fabrication of highly flexible and mechanically robust superhydrophobic F-SiO2@PDMS coatings for self-cleaning and drag-reduction applications

New Journal of Chemistry ◽

10.1039/c8nj04275f ◽

2018 ◽

Vol 42 (22) ◽

pp. 18208-18216 ◽

Cited By ~ 21

Author(s):

Yu Wu ◽

Yizhou Shen ◽

Jie Tao ◽

Zhaoru He ◽

Yuehan Xie ◽

...

Keyword(s):

Drag Reduction ◽

Functional Materials ◽

Superhydrophobic Coatings ◽

Application Potential ◽

Self Cleaning

Superhydrophobic coatings treated as surface functional materials are endowed with great application potential with respect to self-cleaning, drag-reduction, anti-icing, etc.

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