PREPARASI DISPERSI ANTIBAKTERI BERBAHAN DASAR TITANIUM DIOKSIDA (TIO2) SERTA APLIKASINYA PADA KAIN DENGAN METODA DIP COATING

2019 ◽  
Vol 3 (2) ◽  
Author(s):  
Bunga Fisikanta Bukit ◽  
Syarif Hussein Sirait
Keyword(s):  
Antibacterial Activity ◽  
Dip Coating ◽  
Sodium Hypophosphite ◽  
Plate Count ◽  
Cross Linking ◽  
Coating Method ◽  
Plate Count Method ◽  
Dip Coating Method ◽  
Fabric Surface ◽  
Hospital Equipment

Cases of nosocomial infections in Indonesia are increasing every year. One of the reasons is hospital equipment that is not sterile and poorly maintained in public facilities used in hospitals such as sheets, pillowcases, blankets, curtains, towels, and patient clothes. Everything made from fabrics can be contaminated by bacteria causing infections. In this research, the preparation of antibacterial based on titanium dioxide (TiO2) and its application to the fabric using a simple methodology. Cross-linking using Maleic Acid and catalyst using sodium hypophosphite. The dip-coating method is used to coat the fabric. Then, fabric washing is carried out to see the decrease in the amount of TiO2. Plate Count Method is carried out to see the antibacterial activity on the fabric. Fabric characterization was carried out using SEM and FTIR. SEM shows that TiO2 particles distributed throughout the fabric surface. After washing 10 times, there is a reduction in the amount of TiO2 in the fabric. FTIR aims at cross-linking between TiO2 and fabric. Meanwhile, testing for antibacterial activity showed that no bacteria appeared in all samples.

Preparation of a novel anti-fouling β-cyclodextrin–PVDF membrane

RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 51364-51370 ◽  
Author(s):  
Zongxue Yu ◽  
Yang Pan ◽  
Yi He ◽  
Guangyong Zeng ◽  
Heng Shi ◽  
...  
Keyword(s):  
Interfacial Reaction ◽  
Dip Coating ◽  
Cross Linking ◽  
Pvdf Membrane ◽  
Coating Method ◽  
Dip Coating Method ◽  
Trimesoyl Chloride

A novel β-cyclodextrin (β-CD)–PVDF membrane was preparedviaan interfacial reaction, using Trimesoyl Chloride (TMC) and β-CD as cross-linking and modification agents, respectively. The membranes were modified by a simple dip-coating method.

scholarly journals FLAME RETARDANCY IMPROVEMENT OF MODIFIED COTTON FABRIC BY NANO SILICA SOL COATING

2020 ◽  
Vol 58 (4) ◽  
pp. 473
Author(s):  
Vu Anh Tuan ◽  
Pham Thi Thu Trang ◽  
Giang H. Ha Le ◽  
Manh B Nguyen ◽  
Tran Quang Vinh ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Flame Retardancy ◽  
Dip Coating ◽  
Silica Sol ◽  
Nano Silica ◽  
Tear Strength ◽  
Coating Method ◽  
Coated Fabrics ◽  
Dip Coating Method ◽  
Fabric Surface

Cotton fabric was coated by silica sol at different times using dip-coating method. Nano silica coated fabrics were characterized by XRD, FTIR, SEM, EDX, TGA. From SEM result, it showed that fabric surface was coated by nanosilica particles of 20-30 nm size. Nano silica coated fabrics showed the improvement not only flame retardancy (LOI increased from 18.4 to 30.8) but also the tear strength. Tear strength increased from 23 N/mm (cotton fabric) to 29.9 N/mm (fabric coated nanosilica at 3 times).

Porous Gel Coatings Obtained by Phase Separation in ORMOSIL System

2000 ◽  
Vol 628 ◽  
Author(s):  
Kazuki Nakanishi ◽  
Souichi Kumon ◽  
Kazuyuki Hirao ◽  
Hiroshi Jinnai
Keyword(s):  
Phase Separation ◽  
Reaction Time ◽  
Volume Fraction ◽  
Sol Gel ◽  
Reaction Times ◽  
Dip Coating ◽  
Coating Solution ◽  
Coating Method ◽  
Gel Phase ◽  
Dip Coating Method

ABSTRACTMacroporous silicate thick films were prepared by a sol-gel dip-coating method accompanied by the phase separation using methyl-trimethoxysilane (MTMS), nitric acid and dimethylformamide (DMF) as starting components. The morphology of the film varied to a large extent depending on the time elapsed after the hydrolysis until the dipping of the coating solution. On a glass substrate, the films prepared by early dipping had inhomogeneous submicrometer-sized pores on the surface of the film. At increased reaction times, relatively narrow sized isolated macropores were observed and their size gradually decreased with the increase of reaction time. On a polyester substrate, in contrast, micrometer-sized isolated spherical gel domains were homogeneously deposited by earlier dippings. With an increase of reaction time, the volume fraction of the gel phase increased, then the morphology of the coating transformed into co-continuous gel domains and macropores, and finally inverted into the continuous gel domains with isolated macropores. The overall morphological variation with the reaction time was explained in terms of the phase separation and the structure freezing by the forced gelation, both of which were induced by the evaporation of methanol during the dipping operation.

scholarly journals Preparation of Polypropylene/PVDF Composite Membrane by Dip-Coating Method

2021 ◽  
Vol 1115 (1) ◽  
pp. 012028
Author(s):  
P T P Aryanti ◽  
G Trilaksono ◽  
A Hotmaida ◽  
M A Afifah ◽  
F P Pratiwi ◽  
...  
Keyword(s):  
Composite Membrane ◽  
Dip Coating ◽  
Coating Method ◽  
Dip Coating Method

Characterization of UHMWPE- HAp coating produced by dip coating method on Ti6Al4V alloy

2021 ◽  
pp. 127091
Author(s):  
Gözde Çelebi Efe ◽  
Elif Yenilmez ◽  
İbrahim Altinsoy ◽  
Serbülent Türk ◽  
Cuma Bindal
Keyword(s):  
Dip Coating ◽  
Ti6al4v Alloy ◽  
Coating Method ◽  
Dip Coating Method

scholarly journals The Effect of Film Thickness and Content on Film Formation from PS/ Nanocomposites Prepared by Dip-Coating Method

2012 ◽  
Vol 2012 ◽  
pp. 1-17 ◽  
Author(s):  
M. Selin Sunay ◽  
Onder Pekcan ◽  
Saziye Ugur
Keyword(s):  
Film Thickness ◽  
Elevated Temperatures ◽  
Film Formation ◽  
Fluorescence Emission ◽  
Dip Coating ◽  
Atomic Force ◽  
Annealing Step ◽  
Coating Method ◽  
Fluorescence Emission Intensity ◽  
Dip Coating Method

Steady-state fluorescence (SSF) technique in conjunction with UV-visible (UVV) technique and atomic force microscope (AFM) was used for studying film formation from TiO2covered nanosized polystyrene (PS) latex particles (320 nm). The effects of film thickness and TiO2content on the film formation and structure properties of PS/TiO2composites were studied. For this purpose, two different sets of PS films with thicknesses of 5 and 20 μm were prepared from pyrene-(P-) labeled PS particles and covered with various layers of TiO2using dip-coating method. These films were then annealed at elevated temperatures above glass transition temperature () of PS in the range of 100–280°C. Fluorescence emission intensity, from P and transmitted light intensity, were measured after each annealing step to monitor the stages of film formation. The results showed that film formation from PS latexes occurs on the top surface of PS/TiO2composites and thus developed independent of TiO2content for both film sets. But the surface morphology of the films was found to vary with both TiO2content and film thickness. After removal of PS, thin films provide a quite ordered porous structure while thick films showed nonporous structure.

Preparation and properties of polyurethane coatings modified by polysilazane

2019 ◽  
Vol 32 (6) ◽  
pp. 611-619 ◽  
Author(s):  
Xiaoli Liu ◽  
Zhen Ge ◽  
Wenguo Zhang ◽  
Yunjun Luo
Keyword(s):  
Mechanical Property ◽  
Photoelectron Spectroscopy ◽  
Composite Coatings ◽  
Composite Films ◽  
Dip Coating ◽  
Water Contact ◽  
Research Attention ◽  
Elongation At Break ◽  
Coating Method ◽  
Dip Coating Method

Due to their unique physicochemical properties, polysilazanes exhibit excellent performance when combined with some resin matrixes, which had drawn great research attention. In this article, polyurethane (PU) was firstly prepared by polytetrahydrofuran glycol, isophorone diisocyanate, and 1,4-butanediol as main materials. Then, the prepared PU was blended with polysilazane by mixing the two solutions together, which was cured to films via dip-coating method at room temperature. The structure, thermal stability, and surface properties of the composite coatings were investigated by Fourier-transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy. The results demonstrated that after modification with polysilazane, the heat resistance, hydrophobicity, and mechanical property of the PU coatings were improved. When the content of polysilazane was 6 wt%, the mechanical property of the composite films was optimized, with a maximum tensile strength of 25.7 MPa and elongation at break of 797%. Meanwhile, the water contact angle of the composite film was 107° and the water absorption reached a minimum of 2.1%, which showed improved hydrophobicity and water resistance.

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