Optically Active Polyurethane/Silica Aerogel Coated Cotton Fabrics for Thermal Protection

Application of SiO2 aerogel in thermal protective clothing has been limited due to its brittle nature, ordinary mechanical properties, and poor film forming performance. This work is aimed to develop thermal protective cotton fabrics by coating blended OPU/SiO2 aerogel with enhanced mechanical properties and thermal protection performance. The OPU/SiO2 aerogel composites with different ratio were applied onto cotton fabrics by knife-coating. The morphology, chemical component, crystalline structure, thermal stability and compression strength were characterized by scanning electron microscopy (SEM), Fourier transfer Infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG) and compression test, respectively. Besides, the warmth retention performance and heat protection performance together with air and moisture permeability of the coated fabrics were studied. The results showed that OPU/SiO2 aerogel were successfully coated onto cotton fabrics with enhanced mechanical properties and thermal stability together with better film forming capacity. The heat transfer coefficient of the coated cotton fabrics was distinctly dropped due to the synergistic effect of OPU and SiO2 aerogel, which resulted in higher warmth retention. The OPU/SiO2 aerogel coated fabrics exhibited obvious heat insulation performance with its surface temperate almost 4°C than the uncoated fabrics. This work demonstrates a new strategy of fabricating stronger thermal insulating textiles using OPU/SiO2 aerogel composites.

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Effects of the Potassium Titanate Functional Filler Types on the Thermal Protection Performance of Heat Resistant Ablative Coated Fabrics

NANO ◽

10.1142/s1793292018500145 ◽

2018 ◽

Vol 13 (02) ◽

pp. 1850014 ◽

Cited By ~ 3

Author(s):

Guoyi Liu ◽

Yuanjun Liu ◽

Xiaoming Zhao

Keyword(s):

Thermal Stability ◽

Thermal Protection ◽

High Strength ◽

Radiant Heat ◽

Insulation Property ◽

Minimum Diameter ◽

Potassium Titanate ◽

Heat Resistant ◽

Coated Fabric ◽

Coated Fabrics

Considering sub-micron potassium titanate whiskers (BX-101), nanoscale potassium titanate whiskers (AX-301), sub-micron potassium titanate whiskers (AX-316) and high strength potassium titanate crystal (AX-319) as functional fillers, heat resistant ablative coated fabrics which have high radiant heat reflectivity were prepared. The effect of the type of functional filler on the thermal protection performance of heat resistant ablative coated fabrics was mainly discussed. Research showed that the microstructure of potassium titanate functional filler had a significant impact on the radiant heat reflectivity and thermal insulation performance of the prepared coated fabric. The coated fabric which took nanoscale potassium titanate whiskers (AX-301) with a minimum diameter and greater length-diameter ratio as functional filler has the highest thermal reflectivity and the best insulation property. Heat ray reflectivity of potassium titanate coated fabrics had positive correlation with their crystallinities. The higher the coated fabric crystallinity was, the greater the heat ray reflectivity. Thermogravimetric analysis results showed that after adding four kinds of potassium titanate fillers, the thermal stability of the prepared coated fabrics was enhanced, and the nanoscale potassium titanate whiskers (AX-301) coated fabrics had the best thermal stability.

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Improving of thermal stability and water repellency of cotton fabrics via coating with silicone rubber under the effect of electron beam irradiation

Journal of Industrial Textiles ◽

10.1177/15280837211046622 ◽

2021 ◽

pp. 152808372110466

Author(s):

Mahmoud S Hassan ◽

Mona K Attia ◽

Rehab M Attia

Keyword(s):

Thermal Stability ◽

Electron Beam ◽

Silicone Rubber ◽

Electron Beam Irradiation ◽

Water Repellency ◽

Cotton Fabrics ◽

Beam Irradiation ◽

Swelling Properties ◽

Gel Content ◽

Coated Fabrics

Cotton fabrics for outdoor use were coated with room-temperature vulcanizing silicone rubber (RTVSR) and its catalyst to obtain improved thermal stability and water repellency properties. The coated fabrics were exposed to different doses of electron beam irradiation as an extra curing step for the coating. The effect of RTVSR coating and subsequent electron beam irradiation on the cotton fabrics was then studied. The thermal stability was investigated by thermogravimetric analysis, and surface morphologies were observed by scanning electron microscopy. The mechanical properties, crease recovery, gel content, swelling property, and water repellency of the fabrics were also investigated. The results showed that the thermal stability and the water repellency of the cotton fabrics were improved as a result of the coating process. Moreover, the crease recovery and swelling properties of the fabrics were enhanced, accompanied by decreases in their gel content, as a function of the increase in the electron beam irradiation dose. These findings recommend the produced coated fabrics under the optimum conditions for use in the industrial purposes as isolation sheets through the pipes connecting points, especially those that contain hot fluids.

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Thermal stability, flame retardancy and mechanical properties of cotton fabrics treated with inorganic coatings synthesized through sol–gel processes

Carbohydrate Polymers ◽

10.1016/j.carbpol.2011.10.032 ◽

2012 ◽

Vol 87 (3) ◽

pp. 2093-2099 ◽

Cited By ~ 80

Author(s):

Jenny Alongi ◽

Mihaela Ciobanu ◽

Giulio Malucelli

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Flame Retardancy ◽

Sol Gel ◽

Cotton Fabrics ◽

Inorganic Coatings

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Antibacterial Activity of Chemogenic Copper Nanoparticles Coated Cotton Fabrics against Pyogenic Bacteria Isolated from Post Operative Patients

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.622-623.842 ◽

2012 ◽

Vol 622-623 ◽

pp. 842-846

Author(s):

S. Karthick Raja Namasivayam ◽

Arul Maximus Rabel ◽

Teena Abhraham

Keyword(s):

Copper Nanoparticles ◽

Chemical Reduction ◽

Uv Spectroscopy ◽

Colour Change ◽

Cotton Fabrics ◽

Bacterial Strains ◽

Chemical Reduction Method ◽

Coated Fabrics ◽

Diffusion Assay ◽

Coated Cotton

In this present study, copper nanoparticles coated on the cotton fabrics was evaluated for the antibacterial property against bacterial strains isolated from post operative patients.In this study, CUNPs synthesized by chemical reduction method and the synthesized nanoparticles characterized by UV spectroscopy, energy dispersive X ray spectroscopy and further characterized for its size by SEM. CUNPs coated on the bleached cotton fabrics by pad dry cure method. Coating of CUNPs to cotton fabric conferred by SEM and FTIR. The coated fabrics were examined in the range of basic physical–mechanical parameters such as the tensile strength, the bursting strength and air permeability.Anti bacterial activity was determined against the clinical isolate of Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa by agar diffusion assay. Copper nanoparticles synthesized by chemical reduction was primarly confirmed by the colour change of the reaction mixture from blue to olive green, plasmon absorption maxima at 600 nm and uniform sp

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Preparation and Properties of Keratin/CMC Blend Membranes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.647.190 ◽

2013 ◽

Vol 647 ◽

pp. 190-194 ◽

Cited By ~ 2

Author(s):

Tian Yu Ke ◽

Dong Xia Li ◽

Xu Hong Yang

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

Carboxymethyl Cellulose ◽

Reduction Method ◽

Sodium Carboxymethyl Cellulose ◽

Good Ability ◽

Film Forming ◽

Blend Membranes ◽

Wool Keratin

In this work, the wool keratin solution was obtained by a reduction method, and mixed with sodium carboxymethyl cellulose (CMC) solution in order to prepare blend membranes. The structures and mechanical properties of the blend membranes with different keratin/CMC ratios were investigated. It was found the addition of CMC with good molding ability improved the smoothness and enhanced mechanical properties of membranes. The results of instrument analyses showed that the crystallinity, thermal stability and hydration performance of blend membranes were between those of pure keratin and CMC membranes. CMC exhibited good ability to improve the film-forming of keratin membrane.

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A Novel Durable and Water-Soluble N-Halamine Precursor for Antibacterial Cellulose Fabrics

AATCC Journal of Research ◽

10.14504/ajr.7.3.6 ◽

2020 ◽

Vol 7 (3) ◽

pp. 34-41

Author(s):

Denghui Xu ◽

Xingbo Ma ◽

Ping Zhu ◽

Zhiming Jiang

Keyword(s):

Mammalian Cells ◽

Cotton Fabrics ◽

Water Soluble ◽

Optimal Conditions ◽

H Nmr ◽

Ft Ir ◽

Coated Fabrics ◽

Cellulose Fabrics ◽

Coated Cotton ◽

Excellent Stability

A novel, water-soluble N-halamine precursor based on s-triazine (2-(aminoethanesulfonic sodium salt)-4-(4-imino-2,2,6,6- tetramethylpiperidine)-6-monochloro-1,3,5-triazine, ATDT) was synthesized and characterized by FT-IR and 1H-NMR. The cotton fabrics were functionalized with ATDT through the traditional pad-dry-cure method, and optimal conditions were successfully obtained by measuring the active chlorine content. The antibacterial activity of ATDT-coated cotton fabrics was investigated against Staphylococcus aureus and Escherichia coli O157:H7. As a result, 100% of bacteria could be inactivated within a brief contact time. Cell viability was also determined and the results showed that ATDT-modified cotton fabrics had good cytocompatibility to mammalian cells. In addition, the preparation process had little effect on the tensile strength and whiteness of cotton fabrics, although the air permeability showed a slight decrease. The chlorinated ATDT-coated fabrics showed excellent stability against storage and washing.

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Comparative Study of Polyimides Containing Oxadiazole and Ether Groups

High Performance Polymers ◽

10.1177/0954008309339202 ◽

2009 ◽

Vol 21 (5) ◽

pp. 522-534 ◽

Cited By ~ 18

Author(s):

Maria Bruma ◽

Mariana Dana Damaceanu ◽

Peter Muller

Keyword(s):

Mechanical Properties ◽

Thermal Stability ◽

High Temperature ◽

Comparative Study ◽

Aromatic Diamine ◽

Polycondensation Reaction ◽

Free Standing ◽

Aromatic Polyimides ◽

Film Forming ◽

As Solubility

An aromatic diamine with a preformed oxadiazole ring and various dianhydrides with ether and other flexible or bulky groups, such as isopropylidene, hexafluoroisopropylidene, cyclohexylidene or fluorenylidene, were used in a polycondensation reaction at high temperature to produce poly(oxadiazole-ether-imide)s. The properties of these polymers such as solubility, film-forming ability, thermal stability and photoluminescence were studied and compared with those of related conventional aromatic polyimides. The mechanical properties of the free-standing films obtained from these polyimides were also investigated.

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Study on the Morphology and Mechanical Properties of Yak Fiber

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.580.455 ◽

2012 ◽

Vol 580 ◽

pp. 455-460

Author(s):

Qiu Lan Luo ◽

Pu Gao ◽

Dan Deng ◽

Yuan Xue

Keyword(s):

Mechanical Properties ◽

Surface Morphology ◽

Tensile Properties ◽

Raw Materials ◽

High Grade ◽

Retention Performance ◽

Warmth Retention ◽

Very High ◽

Morphology And Mechanical Properties

As a special animal fiber, yak hair has many excellent properties, such as soft feeling, good elasticity, gentle glossy and excellent warmth retention performance, therefore, it has very high industrial value, and can be used as high-grade raw materials in the woolen industry. In this paper, the fineness, length, curl and surface morphology of Yak fiber were analyzed, and mechanical and tensile properties with the different conditions were discussed and compared.

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