Biogenic silver nano sol–loaded spunlace fabric for wound dressing; mechanical and functional characterization

2021 ◽  
pp. 152808372110542
Author(s):  
Hireni Mankodi ◽  
Bharat Patel
Keyword(s):  
Wound Dressing ◽  
Functional Characterization ◽  
Bromophenol Blue ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Coated Fabric ◽  
Sorption Ability ◽  
Blue Stain ◽  
Organic Honey ◽  
Nano Sol

The biogenic silver nano sol (AgNS) is most suitable for biomedical applications due to its inherent properties. In the present investigation polyester (P), viscose (V) and polyester/viscose blend (50:50) (PV) spunlaced fabrics were coated with AgNS prepared using organic honey, manuka honey. The dip-coated fabric samples were found suitable for wound dressing purposes when evaluated layered wise for their mechanical properties. The layer-wise dispersion behavior of the V sample was found better than the P/V and P samples. In the case of the air permeability sample, P/V performed better compared to V and P samples. Water sorption ability of P/V and V are found suitable for wound dressing. The ultraviolet protection factor value of treated fabric found excellent when coated with only honey. Further, the AgNS loaded fabric exhibited good resistance against microbial organisms as revealed by the bromophenol blue stain.

scholarly journals Structure and Functions of Cocoons Constructed by Eri Silkworm

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2701
Author(s):  
Bin Zhou ◽  
Huiling Wang
Keyword(s):  
Ultraviolet Rays ◽  
Structure Property ◽  
Buffer Effect ◽  
Protection Factor ◽  
Secondary Fracture ◽  
Ultraviolet Protection Factor ◽  
Air Gaps ◽  
Performance Indexes ◽  
Before And After ◽  
And Function

Eri silkworm cocoons (E cocoons) are natural composite biopolymers formed by continuous twin silk filaments (fibroin) bonded by sericin. As a kind of wild species, E cocoons have characteristics different from those of Bombyx mori cocoons (B cocoons). E cocoons have an obvious multilayer (5–9 layers) structure with an eclosion hole at one end and several air gaps between the layers, which can be classified into three categories—cocoon coat, cocoon layer, and cocoon lining—with varying performance indexes. There is a significant secondary fracture phenomenon during the tensile process, which is attributed to the high modulus of the cocoon lining and its dense structure. Air gaps provide cocoons with distinct multistage moisture transmission processes, which form a good moisture buffer effect. Temperature change inside cocoons is evidently slower than that outside, which indicates that cocoons also have an obvious temperature damping capability. The eclosion hole does not have much effect on heat preservation of E cocoons. The high sericin content of the cocoon coat, as well as the excellent ultraviolet absorption and antimicrobial abilities of sericin, allows E cocoons to effectively prevent ultraviolet rays and microorganisms from invading pupae. The ultraviolet protection factor (UPF) of the E cocoon before and after degumming were found to be 17.8% and 9.7%, respectively, which were higher than those of the B cocoon (15.3% and 4.4%, respectively), indicating that sericin has a great impact on anti-UV performance. In the cocoon structure, the outer layer of the cocoon has 50% higher content than the inner layer, and the E cocoon shows stronger protection ability than the B cocoon. Understanding the relationship between the structure, property, and function of E cocoons will provide bioinspiration and methods for designing new composites.

scholarly journals Antimicrobial Activity and Barrier Properties against UV Radiation of Alkaline and Enzymatically Treated Linen Woven Fabrics Coated with Inorganic Hybrid Material

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5701
Author(s):  
Joanna Olczyk ◽  
Jadwiga Sójka-Ledakowicz ◽  
Anetta Walawska ◽  
Anna Antecka ◽  
Katarzyna Siwińska-Ciesielczyk ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Uv Radiation ◽  
New Technologies ◽  
Barrier Properties ◽  
Dip Coating ◽  
Sem Analysis ◽  
Woven Fabrics ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Harmful Effects

One of the directions of development in the textiles industry is the search for new technologies for producing modern multifunctional products. New solutions are sought to obtain materials that will protect humans against the harmful effects of the environment, including such factors as the activity of microorganisms and UV radiation. Products made of natural cellulose fibers are often used. In the case of this type of material, it is very important to perform appropriate pretreatment before subsequent technological processes. This treatment has the aim of removing impurities from the surface of the fibers, which results in the improvement of sorption properties and adhesion, leading directly to the better penetration of dyes and chemical modifiers into the structure of the materials. In this work, linen fabrics were subjected to a new, innovative treatment being a combination of bio-pretreatment using laccase from Cerrena unicolor and modification with CuO-SiO2 hybrid oxide microparticles by a dip-coating method. To compare the effect of alkaline or enzymatic pretreatment on the microstructure of the linen woven fabrics, SEM analysis was performed. The new textile products obtained after this combined process exhibit very good antimicrobial activity against Candida albicans, significant antibacterial activity against the Gram-negative Escherichia coli and the Gram-positive Staphylococcus aureus, as well as very good UV protection properties (ultraviolet protection factor (UPF) > 40). These innovative materials can be used especially for clothing or outdoor textiles for which resistance to microorganisms is required, as well as to protect people who are exposed to long-term, harmful effects of UV radiation.

Anti-ultraviolet properties of β-cyclodextrin-grafted cotton fabrics dyed by broadleaf holly leaf extract

2020 ◽  
Vol 90 (21-22) ◽  
pp. 2441-2453 ◽  
Author(s):  
Jinshu Liu ◽  
Xiaoyan Ma ◽  
Wenzhao Shi ◽  
Jianwei Xing ◽  
Chaoqun Ma ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Leaf Extract ◽  
Cotton Fabrics ◽  
Sodium Hypophosphite ◽  
Crosslinking Reaction ◽  
Ultraviolet Spectrophotometry ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Ultraviolet Protection ◽  
Macerated Extract

The aim of the study was to investigate the anti-ultraviolet properties of β-cyclodextrin-grafted cotton fabrics dyed with broadleaf holly leaf extract. Flavonoids were extracted from broadleaf holly leaf by maceration and a stoichiometry of 1:1 inclusion complex with β-cyclodextrin was formed. Characterized by the fluorescence spectrum and ultraviolet spectrophotometry, the fluorescence intensities and ultraviolet absorption of the macerated extract were enhanced by increasing the amount of cyclodextrin. Cotton fabrics were grafted with β-cyclodextrin through a crosslinking reaction based on citric acid in the presence of sodium hypophosphite then dyed with the macerated extract of broadleaf holly leaf used as a natural ultraviolet absorbent. The anti-ultraviolet property of fabrics dyed by a macerated extract was characterized in terms of the ultraviolet protection factor. It was noted that the cotton fabrics grafted with β-cyclodextrin exhibit enhanced anti-ultraviolet and wrinkle recovery properties compared to the unmodified samples and show an excellent durability against 30 washing cycles, accompanied by a loss of tensile strength.

scholarly journals A new development for determining the ultraviolet protection factor

2015 ◽  
Vol 45 (6) ◽  
pp. 1571-1586 ◽  
Author(s):  
J Campos Payá ◽  
P Díaz-García ◽  
I Montava ◽  
P Miró-Martínez ◽  
M Bonet
Keyword(s):  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
New Development ◽  
Ultraviolet Protection

scholarly journals Ultraviolet Protection by Fabric Engineering

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Mukesh Kumar Singh ◽  
Annika Singh
Keyword(s):  
Areal Density ◽  
Woven Fabrics ◽  
Uv Protection ◽  
Comfort Level ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Wear Comfort ◽  
Ultraviolet Protection ◽  
Multifilament Yarns ◽  
Fabric Structures

Background. The increasing emission of greenhouse gases has evoked the human being to save the ozone layer and minimize the risk of ultraviolet radiation (UVR). Various fabric structures have been explored to achieve desired ultraviolet protection factor (UPF) in various situations. Objective. In this study, the effect of various filament configurations like twisted, flat, intermingled, and textured in multifilament yarns on fabric in different combinations is assessed in order to engineer a fabric of better ultraviolet protection factor (UPF). Methods. In order to engineer a fabric having optimum UV protection with sufficient comfort level in multifilament woven fabrics, four different yarn configurations, intermingled, textured, twisted, and flat, were used to develop twelve different fabric samples. The most UV absorbing and most demanding fibre polyethylene terephthalate (PET) was considered in different filament configuration. Results. The combinations of intermingled warp with flat, intermingled, and textured weft provided excellent UVR protection comparatively at about 22.5 mg/cm2 fabric areal density. The presence of twisted yarn reduced the UV protection due to enhanced openness in fabric structure. Conclusion. The appropriate combination of warp and weft threads of different configuration should be selected judiciously in order to extract maximum UV protection and wear comfort attributes in multifilament woven PET fabrics.

Influence of Metal Mordants Concentration to Improve UV Protection and Fastness Properties of Silk Fabric Dyed with Purple Corn Cob

2014 ◽  
Vol 1030-1032 ◽  
pp. 430-433
Author(s):  
Rattanaphol Mongkholrattanasit ◽  
Charoon Klaichoi ◽  
Pannarai Rug-Ngam ◽  
Monthon Nakpathom ◽  
Manat Paengsai ◽  
...  
Keyword(s):  
Uv Protection ◽  
Silk Fabric ◽  
Fastness Properties ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Metallic Salts ◽  
Ultraviolet Protection ◽  
Purple Corn ◽  
Protection Property ◽  
Silk Fabrics

In the present study, natural dye from cob of purple corn and various metallic salts have been used to identify the proper dyeing condition for attaining high quality natural dyeing along with imparting UV protection property to the dyed silk fabric. Silk fabrics dyed with cob of purple corn extract showed a violetish-pink shade, while those dyed with alum light violetish-pink shade colour. Silk substrates dyed with CuSO4 and FeSO4 gave a yellowish grey and violetish-gray colour, respectively. The fastness properties ranged from fair to good. The ultraviolet protection factor (UPF) values of silk fabric dyed with and without metal mordants ranged between very good and excellent.

Multifunctional nanocoating finishing of polyester/cotton woven fabric by the sol-gel method

2017 ◽  
Vol 88 (8) ◽  
pp. 946-956 ◽  
Author(s):  
Dorota Kowalczyk ◽  
Stefan Brzeziński ◽  
Irena Kamińska
Keyword(s):  
Metallic Nanoparticles ◽  
Sol Gel ◽  
Fiber Surface ◽  
Color Difference ◽  
Woven Fabrics ◽  
Woven Fabric ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Standard Value ◽  
Escherichia Coli Bacteria

This paper presents the test results of multifunctional thin-coating textile finishing with the use of hybrid Al2O3/SiO2 sol modified with metallic nanoparticles of Ag/Cu powder and TiO2 P25. The modified hybrid Al2O3/SiO2 sol was deposited on polyester/cotton (67/33) woven fabrics by the padding method, followed by drying and thermal heating to obtain a thin and elastic xerogel coating on the fabric fiber surface. The woven fabrics finished in this way were characterized by very good bioactive properties against Staphylococcus aureus and Escherichia coli bacteria and Candida albicans and Aspergillus niger fungi (83–92% reduction in bacteria and 87–93% reduction in fungi) and showed photocatalytic self-cleaning capabilities and a high protection against ultraviolet (UV) radiation. The color difference ( ΔE) obtained after UV irradiation for 112 h was 11.6, and the ultraviolet protection factor (UPF) value considerably exceeded the limiting standard value of 50, while in the case of a reference woven fabric, ΔE = 4 and UPF was about 40. At the same time, the woven fabrics finished were characterized by a high resistance to abrasion.

Research on Pad-Dry Dyeing and Ultraviolet Protection of Silk Fabric Using Dyes Extracted from Laccifer lacca Kerr

2014 ◽  
Vol 1010-1012 ◽  
pp. 512-515
Author(s):  
Rattanaphol Mongkholrattanasit ◽  
Charoon Klaichoi ◽  
Monthon Nakpathom ◽  
Jitti Pattavanitch ◽  
Nattadon Rungruangkitkrai
Keyword(s):  
Stannous Chloride ◽  
Silk Fabric ◽  
Fastness Properties ◽  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
Colour Strength ◽  
Potential Applications ◽  
Ultraviolet Protection ◽  
Silk Fabrics ◽  
Concentration Levels

Silk fabric was dyed with the colourant extracted from Laccifer Lacca Kerr. by using post-mordanting process and pad-dry technique. The effect of metal mordantats at different mordant concentration levels on their colour strength was also investigated. Silk fabrics dyed with Laccifer Lacca extract showed a light pink shade, while those dyed with alum and stannous chloride produces pinkish-red colour. Silk mordanted with CuSO4 gave a purple red colour, while those dyed with FeSO4 had a reddish-gray colour. The fastness properties ranged from fair to good, while washing fastness was poor level. The ultraviolet protection factor (UPF) values of silk fabric dyed with and without metal mordants ranged between good and excellent for dyed fabric.The results confirmed that natural dyes from Laccifer Lacca Kerr. extract have potential applications for silk fabric dyeing and producing ultraviolet (UV) protective silk fabric.

Influence of wetness on the ultraviolet protection factor (UPF) of textiles: in vitro and in vivo measurements

2002 ◽  
Vol 18 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Thilo Gambichler ◽  
Kathryn L. Hatch ◽  
Annelies Avermaete ◽  
Peter Altmeyer ◽  
Klaus Hoffmann
Keyword(s):  
Protection Factor ◽  
Ultraviolet Protection Factor ◽  
In Vivo Measurements ◽  
Ultraviolet Protection
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