scholarly journals Thermosensitive Behavior and Super-Antibacterial Properties of Cotton Fabrics Modified with a Sercin-NIPAAm-AgNPs Interpenetrating Polymer Network Hydrogel

Polymers ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 818 ◽  
Author(s):  
Yifan Cui ◽  
Zijing Xing ◽  
Jun Yan ◽  
Yanhua Lu ◽  
Xiaoqing Xiong ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Polymer Network ◽  
Antibacterial Properties ◽  
Cotton Fabrics ◽  
Interpenetrating Polymer Network ◽  
Solution Temperature ◽  
Impregnation Method ◽  
Scanning Calorimetry ◽  
Ft Ir ◽  
The Fourier Transform

Poly(N-isopropylacrylamide) (PNIPAAm), sericin (SS), and silver nitrate were combined to prepare an interpenetrating network (IPN) hydrogel having dual functions of temperature sensitivity and antibacterial properties. The structure and size of AgNPs in such an IPN hydrogel were characterized by the Fourier Transform Infrared spectrum (FT-IR), X-ray powder diffraction (XRD) and Transmission Electron Microscope (TEM), and the thermal properties of the IPN hydrogel were characterized by Differential Scanning Calorimetry (DSC). Based on XRD patterns, Ag+ was successfully reduced to Ag0 by SS. It was observed by TEM that the particle size of silver particles was lower than 100 nm. The glass transition temperature (Tg) of IPN hydrogel was better than that of the PNIPAAm/AgNPs hydrogels, and lower critical solution temperature (LCST) values of the IPN hydrogel were obtained by DSC i.e. 31 °C. The thermal stability of the IPN hydrogel was successfully determined by the TGA. This IPN hydrogel was then used to modify the cotton fabrics by the “impregnation” method using glutaraldehyde (GA) as the cross-linking agent. The structures and properties of IPN hydrogel modified cotton fabric were characterized by scanning electron microscopy (SEM), FT-IR, and the thermogravimetry analysis (TGA). The results show that NIPAAm was successfully polymerized into PNIPAAm, and that there were neglected new groups in the hydrogel IPN. The IPN hydrogel was then successfully grafted onto cotton fabrics. SEM observations showed that the IPN hydrogel formed a membrane structure between the fibers, and improved the compactness of the fibers. At the temperature close to LCST (≈31 °C), the entire system was easily able to absorb water molecules. However, the hydrophilicity tended to decrease when the temperature was higher or lower than the LCST. The antibacterial rates of the modified cotton fabric against S. aureus and E. coli were as high as 99%.

Study of thermal-sensitive alginate-Ca2+/poly(N-isopropylacrylamide) hydrogels supported by cotton fabric for wound dressing applications

2018 ◽  
Vol 89 (5) ◽  
pp. 801-813 ◽  
Author(s):  
Bing Li ◽  
Dapeng Li ◽  
Yanni Yang ◽  
Lu Zhang ◽  
Ke Xu ◽  
...  
Keyword(s):  
Water Vapor ◽  
Drug Release ◽  
Cotton Fabric ◽  
Wound Dressing ◽  
Transmission Rate ◽  
Cotton Fabrics ◽  
Solution Temperature ◽  
Scanning Calorimetry ◽  
Direct Deposition ◽  
Fabric Surface

In this study, direct deposition, 1,2,3,4-butanetetracarboxylic acid (BTCA) crosslinking, chelating and ultraviolet (UV) photo-grafting methods were employed to bond alginate-Ca2+/poly( N-isopropylacrylamide) (PNIPAAm) interpenetrating network hydrogel onto cotton fabric surface for wound dressing applications. Infrared spectroscopy confirmed the presence of alginate-Ca2+/PNIPAAm hydrogels on the cotton fabrics. Scanning electron microscopy was used to investigate surface and cross-section morphologies. Differential scanning calorimetry and three-dimensional video microscopy indicated that fabric-supported hydrogels maintained the thermal-sensitive property with a lower critical solution temperature (LCST) of around 34–35℃. The results of water vapor permeation revealed that the water vapor transmission rate at 37℃ was significantly higher than that at 25℃ for the shrink and collapse of the hydrogels above the LCST. Moreover, the breaking stress of the fabric-supported hydrogels was similar to that of the original cotton fabrics, but much larger than the hydrogels by themselves. The UV photo-grafting provided the strongest peel strength, followed by the BTCA crosslinking, the chelating and the direct deposition method. The cotton fabric-supported alginate-Ca2+/PNIPAAm hydrogels were stiffer than the original cotton fabric due to the high glass transition temperature of PNIPAAm (about 140℃). The in vitro drug release experiment confirmed that the cumulative release amount was much higher at around 37℃ (above the LCST) than at 25℃ (below the LCST). This showed that the fabric-supported thermal-sensitive hydrogels had functions of keeping the wound area breathable and comfortable, and provided controlled drug release with good mechanical properties, indicating a great potential and significance for wound dressing applications.

Controlled Release of Salidroside Microspheres Prepared Using a Chitosan and Methylcellulose Interpenetrating Polymer Network

2017 ◽  
Vol 13 (10) ◽  
Author(s):  
Zhenlin Chen ◽  
Fangjian Ning ◽  
Xingcun He ◽  
Hailong Peng ◽  
Hua Xiong
Keyword(s):  
Controlled Release ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Fickian Diffusion ◽  
Release Mechanism ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Release Process ◽  
Ft Ir ◽  
Schiff Base Formation

AbstractIn this work, salidroside, a functional food agent, was incorporated into novel interpenetrating polymer network microspheres (IPN-Ms) prepared by chitosan (CS) and methylcellulose (MC) for controlled release and stabilization. IPN-Ms were characterized using scanning electron microscopy, Fourier transform infrared spectroscopy (FT-IR), differential scanning calorimetry and X-ray diffraction. The result indicated that salidroside-loaded IPN-Ms (S-IPN-Ms) are hollow and highly spherical, with a coarse pleated surface and a particle size ranging from 5 to 30 µm. Schiff base formation and the hemiacetal reaction are the primary mechanisms underlying the interpenetrating network cross-linking of IPN-Ms. In S-IPN-Ms, the CS and MC were homogeneously blended, and the salidroside was molecularly and amorphously dispersed. The encapsulation efficiency of the salidroside within the S-IPN-Ms was up to 75.64 %. In the S-IPN-M complex, the release of salidroside by S-IPN-Ms was governed by burst and sustained release, and Fickian diffusion was the primary release mechanism for the entire release process. Thus, controlled release and stabilization of salidroside were achieved through incorporation of salidroside into IPN-Ms prepared by chitosan (CS) and methylcellulose.

Durable Antibacterial Finish on Cotton Fabrics with PAMAM/Ag+

2011 ◽  
Vol 332-334 ◽  
pp. 77-80 ◽  
Author(s):  
Chuan Jie Zhang ◽  
Hong Yang ◽  
Yun Liu ◽  
Ping Zhu
Keyword(s):  
Cotton Fabric ◽  
Antibacterial Agent ◽  
Antibacterial Property ◽  
Breaking Strength ◽  
Antibacterial Properties ◽  
Pamam Dendrimers ◽  
Cotton Fabrics ◽  
E Coli ◽  
Strength Retention ◽  
Better Than

Cotton fabric with excellent antibacterial properties was obtained by treated with polyamide-amine (PAMAM) dendrimers as a carrier and silver nitrate as an antibacterial agent. The antibacterial cotton fabrics were prepared by the methods of one-bath process and two-bath process. Antibacterial activity of cotton fabrics treated by two different methods was good, but the antibacterial durability of cotton fabric treated with two-bath process was better than that treated with one-bath process. After 50 washing cycles, cotton fabric treated with two-bath process still had good antibacterial property and its inhibitory rate to Gram-positive S. aureus and Gram-negative E. coli was over 99 %. It was found that the breaking strength retention of finished cotton fabrics was 85.83 % and the decrease of cotton fabrics’ whiteness index was about 15 %.

Study of Application of Thermal Infrared Camouflage Materials in the National Defense Engineering

2014 ◽  
Vol 651-653 ◽  
pp. 107-110
Author(s):  
Nai Yan Zhang ◽  
Jun Liu
Keyword(s):  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Room Temperature ◽  
Polymer Network ◽  
Thermal Infrared ◽  
Interpenetrating Polymer Network ◽  
National Defense ◽  
Scanning Calorimetry ◽  
Response To Temperature ◽  
Infrared Camouflage

In this paper, a series of semi-interpenetrating polymer network materials based on poly ((2-dimethylamino) ethyl methacrylate)/poly (N, N-diethylacrylamide) (PDMAEMA/PDEA) were synthesized at room temperature. The influence of this additive on the property of resulting PDEA materials was investigated and characterized. The glass transition temperature (Tg) of the semi-IPN materials was observed by Differential Scanning Calorimetry (DSC). Compared to PDEA, the semi-IPN materials exhibited excellent mutative values in response to an alternation of the temperature, and showed fast swelling and deswelling rates in response to temperature change, which suggests that these materials have potential application as thermal infrared camouflage materials.

scholarly journals Preparation and properties of fast temperature-responsive soy protein/PNIPAAm IPN hydrogels

2014 ◽  
Vol 79 (2) ◽  
pp. 211-224 ◽  
Author(s):  
Yong Liu ◽  
Yingde Cui ◽  
Guojie Wu ◽  
Miaochan Liao
Keyword(s):  
Soy Protein ◽  
Polymer Network ◽  
Reaction Medium ◽  
Interpenetrating Polymer Network ◽  
Fickian Diffusion ◽  
Gravimetric Analysis ◽  
Scanning Calorimetry ◽  
Temperature Responsive ◽  
Swelling Mechanism ◽  
Responsive Hydrogels

The interpenetrating polymer network of fast temperature-responsive hydrogels based on soy protein and poly(N-isopropylacrylamide) were successfully prepared using the sodium bicarbonate (NaHCO3) solutions as the reaction medium. The structure and properties of the hydrogels were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry and thermal gravimetric analysis. The swelling and deswelling kinetics were also investigated in detail. The results have shown that the proposed hydrogels had high porous structure, good miscibility and thermal stability, and fast temperature responsivity. The presence of NaHCO3 had little effect on the volume phase transition temperature (VPTT) of the hydrogels, and the VPTTs were at about 32?C. Compared with the traditional hydrogels, the proposed hydrogels had much faster swelling and deswelling rate. The swelling mechanism of the hydrogels was the non-Fickian diffusion. This fast temperature-responsive hydrogels may have potential applications in the field of biomedical materials.

Development of visible-light responsive and mechanically enhanced “smart” UCST interpenetrating network hydrogels

Soft Matter ◽  
2018 ◽  
Vol 14 (1) ◽  
pp. 151-160 ◽  
Author(s):  
Yifei Xu ◽  
Onkar Ghag ◽  
Morgan Reimann ◽  
Philip Sitterle ◽  
Prithwish Chatterjee ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Visible Light ◽  
Polymer Network ◽  
Interpenetrating Polymer Network ◽  
Solution Temperature ◽  
Interpenetrating Network ◽  
Critical Solution Temperature ◽  
Smart Hydrogel ◽  
Upper Critical Solution Temperature

An interpenetrating polymer network, chlorophyllin-incorporated “smart” hydrogel was synthesized and exhibited enhanced mechanical properties, upper critical solution temperature swelling, and promising visible-light responsiveness.

Synthesis and Characteristics of Interpenetrating Polymer Network Hydrogels Based on Konjac Glucomannan with Different Molecular Weights and Poly(acrylic acid)

2011 ◽  
Vol 393-395 ◽  
pp. 1004-1007
Author(s):  
Xue Yao ◽  
Xue Gang Luo ◽  
Ben Chao Han
Keyword(s):  
Acrylic Acid ◽  
Enzymatic Degradation ◽  
Drug Carrier ◽  
Polymer Network ◽  
Konjac Glucomannan ◽  
Interpenetrating Polymer Network ◽  
Swelling Ratio ◽  
Molecular Weights ◽  
Ft Ir ◽  
Poly Acrylic Acid

Konjac glucomannan with different molecular weights/poly(acrylic acid) hydrogels were prepared in this paper. The structure of the IPN hydrogels was characterized by FT-IR and SEM. The swelling ratio of these hydrogels showed they had pH-sensitive properties and the enzymatic degradation tests showed the hydrogels retain the enzymatic degradation character of KGM. Furthermore, hydrogel composed of native KGM degraded sharply in enzymatic degradation test and it had bigger swelling ratio and weight loss ratio than those hydrogels which composed of lower molecular weights KGM. Therefore, hydrogels composed of lower molecular weight might release drug more stable when they were used as drug carrier.

scholarly journals Study on the Photocatalytic and Antibacterial Properties of TiO2 Nanoparticles-Coated Cotton Fabrics

Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 2010 ◽  
Author(s):  
Guangyu Zhang ◽  
Dao Wang ◽  
Jiawei Yan ◽  
Yao Xiao ◽  
Wenyan Gu ◽  
...  
Keyword(s):  
Tio2 Nanoparticles ◽  
Cotton Fabric ◽  
Sol Gel ◽  
Antibacterial Properties ◽  
Average Crystallite Size ◽  
Cotton Fabrics ◽  
Tetrabutyl Titanate ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Scanning Electron Microcopy

Herein, the amino-capped TiO2 nanoparticles were synthesized using tetrabutyl titanate and amino polymers by a two-step sol-gel and hydrothermal method technique for the fabrication of functional cotton fabric. The prepared TiO2 nanoparticles and the treated cotton fabric were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), field emission scanning electron microcopy (FE-SEM) photocatalytic and antibacterial measurement. The results indicate the typical characteristic anatase form of the amino-capped TiO2 NPs with an average crystallite size of 14.9 nm. The treated cotton fabrics exhibit excellent antibacterial property and good photocatalytic degradation of methylene blue.

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