Flame-retardant PNIPAAm/sodium alginate/polyvinyl alcohol hydrogels used for fire-fighting application: Preparation and characteristic evaluations

Yu, Zhicai; Liu, Jinru; He, Hualing; Ma, Shengnan; Yao, Jinyin

doi:10.1016/j.carbpol.2020.117485

Cited by 81 publications

(43 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It can adsorb water molecule in the system. Second, the swelling behavior was associated with interconnected porous structure in hydrogel network, as suggested by Yu et al [23]. This discussion is in agreement with SEM analysis.…”

Section: Resultssupporting

confidence: 87%

Utilization of Freeze Thaw Process for Sodium Alginate and Polyvinyl Alcohol-Based Hydrogel Composite

Muangsri

Chuysinuan

Thanyacharoen

et al. 2022

Preprint

View full text Add to dashboard Cite

Sodium alginate and poly vinyl alcohol-based hydrogel was successfully prepared by freeze thaw process. Without crosslinking agent, hydrogel was formed by using 3, 5 and 7 consecutive cycles of freeze thaw. Hydrogel can be formed by hydrogen bonding formation between OH-group of sodium alginate and poly vinyl alcohol throughout network. Scanning electron microscope reported that microstructure of hydrogel was well packed. The interconnect porosity was also observed. Differential scanning calorimetry exhibited that two exothermic peaks at temperature of 110ºC and 225ºC were observed due to evaporation of water molecule and melting temperature of hydrogel, respectively. The swelling behavior was rapidly increased within initial stage and then it was dimensionally stable. With low sodium alginate content, tensile strength was slightly superior, whereas low in vitro degradation behavior was observed. It was remarkable to note that sodium alginate and poly vinyl alcohol-based hydrogel exhibited outstanding properties for being as a medical material.

show abstract

Section: Resultssupporting

confidence: 87%

Utilization of Freeze Thaw Process for Sodium Alginate and Polyvinyl Alcohol-Based Hydrogel Composite

Muangsri

Chuysinuan

Thanyacharoen

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…A low value of % GF confirms a lower degree of conversion in samples containing glycerin. The change in structure and alterations in the crosslinking process are also confirmed by the peak intensity at ~1240 cm −1 , corresponding to intermolecular hydrogen interactions between PVA-alginate chains [ 14 , 45 , 50 ]. A decreasing intensity of the peak with increasing addition of glycerin seems to confirm the above supposition.…”

Section: Resultsmentioning

confidence: 89%

“…The subsequently observed peaks are located at lower wavenumbers. The deformation vibrations in the range of 1490–1450 cm −1 are characteristic for C–H bonds derived from the –CH 2 – group occurring in the aliphatic PVA chain, and vibrations of O–H bonds at around 1200–1450 cm −1 are characterized for the hydroxyl groups of PVA and SA, which interact with each other through hydrogen bonds [ 45 , 47 , 50 ]. The tensile vibrations from the C–O bond are visible and give peaks in the range 1780–1650 cm −1 attributed to carboxyl groups attached to the rings of alginate acids, which can form ester bonds during chemical crosslinking reactions of the hydrogel using PEGDA.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application

Bialik-Wąs

Pluta

Barczewski

et al. 2021

IJMS

View full text Add to dashboard Cite

The impact of different amounts of glycerin, which was used in the system of sodium alginate/poly(vinyl alcohol) (SA/PVA) hydrogel materials on the properties, such as gel fraction, swelling ability, degradation in simulated body fluids, morphological analysis, and elongation tests were presented. The study shows a significant decrease in the gel fraction from 80.5 ± 2.1% to 45.0 ± 1.2% with the increase of glycerin content. The T5 values of the tested hydrogels were varied and range from 88.7 °C to 161.5 °C. The presence of glycerin in the matrices significantly decreased the thermal resistance, which was especially visible by T10 changes (273.9 to 163.5 °C). The degradation tests indicate that most of the tested materials do not degrade throughout the incubation period and maintain a constant ion level after 7-day incubation. The swelling abilities in distilled water and phosphate buffer solution are approximately 200–300%. However, we noticed that these values decrease with the increase in glycerin content. All tested matrices are characterized by the maximum elongation rate at break in a range of 37.6–69.5%. The FT-IR analysis exhibits glycerin changes in hydrogel structures, which is associated with the cross-linking reaction. Additionally, cytotoxicity results indicate good adhesion properties and no toxicity towards normal human dermal fibroblasts.

show abstract

“…The TSR of CaAlg/HAP was remarkably less than that of CaAlg, possibly because the more char the hybrid material produced, the less smoke containing toxic components was released. Importantly, the less smoke release can reduce casualties in re (Kong et al 2021;Yu et al 2021a).…”

Section: Sem and Xrd Of Caalg And Caalg/hap After Calcination In Airmentioning

confidence: 99%

Simple and green synthesis of calcium alginate/hydroxyapatite hybrid material without high temperature treatment and its flame retardancy

et al. 2022

View full text Add to dashboard Cite

Aiming to improve the thermal stability and ame retardant properties of calcium alginate, calcium alginate (CaAlg)/hydroxyapatite (HAP) hybrid material was synthesized in situ by the sol-gel method at room temperature. It was found that the HAP particles were generated from nanospheres to urchin-like microspheres, nally to wrinkled sponge microspheres with the two-dimensional nanostructured surface. The results show that the thermal stability and ame retardancy of the hybrid material were signi cantly improved, and its mechanism was proposed as HAP promoted the decarboxylation of alginate resulting in carbonization of CaAlg/HAP, and it was the function of soild phase before 350 ℃, while the synergistic effects of gas phase and solid phase after 350 ℃ that led to the high ame retardancy of CaAlg/HAP.

show abstract

Flame-retardant PNIPAAm/sodium alginate/polyvinyl alcohol hydrogels used for fire-fighting application: Preparation and characteristic evaluations

Cited by 81 publications

References 36 publications

Utilization of Freeze Thaw Process for Sodium Alginate and Polyvinyl Alcohol-Based Hydrogel Composite

Utilization of Freeze Thaw Process for Sodium Alginate and Polyvinyl Alcohol-Based Hydrogel Composite

The Effect of Glycerin Content in Sodium Alginate/Poly(vinyl alcohol)-Based Hydrogels for Wound Dressing Application

Simple and green synthesis of calcium alginate/hydroxyapatite hybrid material without high temperature treatment and its flame retardancy

Contact Info

Product

Resources

About