scholarly journals Electrospun Sericin/PNIPAM-Based Nano-Modified Cotton Fabric with Multi-Function Responsiveness

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 632
Author(s):  
Jia Li ◽  
Bo-Xiang Wang ◽  
De-Hong Cheng ◽  
Zhi-Mei Liu ◽  
Li-Hua Lv ◽  
...  
Keyword(s):  
Smart Materials ◽  
Polymer Network ◽  
Cotton Fabrics ◽  
Interpenetrating Polymer Network ◽  
Stimuli Responsive ◽  
Gram Positive Bacteria ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Cotton Textiles ◽  
Poly Ethylene

There is a significant interest in developing environmentally responsive or stimuli-responsive smart materials. The purpose of this study was to investigate multi-function responsive cotton fabrics with surface modification on the nanoscale. Three technologies including electrospinning technology, interpenetrating polymer network technology, and cross-linking technology were applied to prepare the multi-function sericin/poly(N-isopropylacrylamide)/Poly(ethylene oxide) nanofibers, which were then grafted onto the surfaces of cotton textiles to endow the cotton textiles with outstanding stimuli-responsive functionalities. The multi-function responsive properties were evaluated via SEM, DSC, the pH-responsive swelling behavior test and contact angle measurements. The results demonstrate that with this method, multi-function responsive, including thermo- and pH-responsiveness, cotton fabrics were fast formed, and the stimuli-responsiveness of the materials was well controlled. In addition, the antimicrobial testing reveals efficient activity of cotton fabrics with the sericin/PNIPAM/PEO nanofiber treatments against Gram-positive bacteria and Gram-negative bacteria such as Staphylococcus aureus and Escherichia coli. The research shows that the presented strategy demonstrated the great potential of multi-function responsive cotton fabrics fabricated using our method.

Synthesis and characterization of a dyeable bio-based polyurethane/branched poly(ethylene imine) interpenetrating polymer network with enhanced wet fastness

2017 ◽  
Vol 89 (3) ◽  
pp. 335-346 ◽  
Author(s):  
Jae Woo Chung ◽  
Ji Hwan Park ◽  
Hyung-Min Choi ◽  
Kyung Wha Oh
Keyword(s):  
Network Structure ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Interpenetrating Network ◽  
Ethylene Imine ◽  
Angle Measurements ◽  
Methylene Diphenyl Diisocyanate ◽  
Contact Angle Measurements ◽  
Solution Casting Method ◽  
Poly Ethylene

Bio-based polyurethane is synthesized from biodegradable polycaprolactone, methylene diphenyl diisocyanate and 1,4-butanediol. The bio-based polyurethane is blended with branched polyethyleneimine by a solution casting method and further treated with glutaraldehyde. From nuclear magnetic resonance, Fourier-transform infrared spectroscopy, leaching tests and contact angle measurements, it was found that a semi-interpenetrating polymer network structure is induced by the glutaraldehyde treatment of the bio-based polyurethane/branched polyethyleneimine blend film, which resulting from the crosslinking of branched polyethyleneimine by imine bonds formed from the amine-aldehyde reaction between branched polyethyleneimine and glutaraldehyde. In addition, the glass transition temperature, Young’s modulus and the shape retention results show that the mechanical strength of bio-based polyurethane, which is weakened by the plasticizing effect of branched polyethyleneimine, is restored by the formation of the semi-interpenetrating network structure. We found that the bio-based polyurethane/branched polyethyleneimine with a semi-interpenetrating network shows a much higher affinity for Acid Red 4 than bio-based polyurethane, and the wet fastness of dye is significantly improved by the formation of the semi-interpenetrating network.

Surface Modification of Copolyether-Urethane Catheters with Poly(Ethylene Oxide)

1989 ◽  
Vol 12 (6) ◽  
pp. 390-394 ◽  
Author(s):  
E. Brinkman ◽  
A. Poot ◽  
T. Beugeling ◽  
L. Van Der Does ◽  
A. Bantjes
Keyword(s):  
Surface Modification ◽  
Ethylene Oxide ◽  
Blood Compatibility ◽  
Angle Measurements ◽  
Fold Reduction ◽  
Contact Angle Measurements ◽  
Platelet Deposition ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Pellethane 2363 80A catheters were modified with poly(ethylene oxide) in order to improve their blood compatibility. Contact angle measurements showed that Pellethane 2363 80A surfaces had increased wettability after this modification. The results of in vitro blood compatibility tests showed that surface modification with poly(ethylene oxide) resulted in a five-fold reduction of platelet deposition. Activation of coagulation was not affected.

Formation and blood compatibility of thin layers of hyperbranched polymers on polyurethane films

e-Polymers ◽  
2002 ◽  
Vol 2 (1) ◽  
Author(s):  
Yong Soon Park ◽  
Yong Soo Kang ◽  
Dong June Chung
Keyword(s):  
Blood Compatibility ◽  
Film Surface ◽  
Hyperbranched Polymers ◽  
Thin Layers ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Unique Method ◽  
Poly Ethylene Oxide ◽  
Ft Ir ◽  
Poly Ethylene

AbstractTwo kinds of hyperbranched polymers, star-shaped poly(ethylene oxide) and poly(2-ethyl-2-oxazoline)-bound polyamidoamine dendrimer, were immobilized on polyurethane (PU) films using photoreactive azidophenyl groups. Immobilization of the hyperbranched polymers was verified by ATR FT-IR observations and contact angle measurements. Using photoreactive molecules, this study shows a unique method to modify polymer films without functional groups easily through immobilization of other polymers on the film surface. PU surfaces modified with immobilized hyperbranched polymer showed significantly reduced platelet adhesion, i.e. increased blood compatibility, as measured via UV spectrometry and scanning electron microscopy.

Temperature- and pH-tunable plasmonic properties and SERS efficiency of the silver nanoparticles within the dual stimuli-responsive microgels

2014 ◽  
Vol 2 (35) ◽  
pp. 7326-7335 ◽  
Author(s):  
Xiaoyun Liu ◽  
Xiuqin Wang ◽  
Liusheng Zha ◽  
Danli Lin ◽  
Jianmao Yang ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Network Structure ◽  
Ph Value ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Stimuli Responsive ◽  
Plasmonic Property

Plasmonic property and SERS efficiency of the silver nanoparticles embedded within the microgels with an interpenetrating polymer network structure can be reversibly tuned by temperature and pH value.

scholarly journals Preparation and characterization of polyethylene glycol/poly(L-lactic acid) blends

2017 ◽  
Vol 89 (1) ◽  
pp. 141-152 ◽  
Author(s):  
Ioanna-Georgia Athanasoulia ◽  
Petroula A. Tarantili
Keyword(s):  
Contact Angle ◽  
Lactic Acid ◽  
Degradation Process ◽  
Water Contact ◽  
Wetting Ability ◽  
Angle Measurements ◽  
Low Concentrations ◽  
Contact Angle Measurements ◽  
Twin Screw ◽  
Poly Ethylene

AbstractThe effect of incorporation of poly(ethylene glycol) (PEG) on thermomechanical and hydrophilicity properties of poly(L-lactic acid) (PLLA) was investigated. PEG/PLLA blends, containing 10, 20, 30 and 40 wt% PEG, were prepared by melt-extrusion in a co-rotating twin-screw extruder. By DSC analysis, it was observed that the Tg of PLLA phase in PEG/PLLA blends decreased accompanied by a significant decrease in Tcc and increase in their melting enthalpy. Therefore, the addition of PEG enhances the crystallization ability of PLLA phase due to its lubricating effect which increased mobility of PLLA chains. From TGA it was observed that low concentrations of PEG (10 & 20 wt%) increase the Tonset of thermal degradation, probably due to improved heat resistance of the crystalline phase. At higher PEG content, the Tonset decreases, as the lubricating effect becomes the controlling mechanism for the initiation of degradation process. Decrease in tensile strength and modulus was recorded especially in PLLA blends with PEG content higher than 20 wt%. The elongation at break decreases reaching a maximum at 20 wt% PEG and then dropped again. To investigate the effect of PEG on the wetting ability of PLLA, water contact angle measurements were performed. The results indicate that the introduction of PEG lowers the contact angle values in PEG/PLLA film surfaces, as compared to pure PLLA, suggesting improved hydrophilic properties.

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