Tailoring thermal and flame retardant properties via synergistic effect in polyvinyl alcohol nanocomposites based on polyphosphonate and/or SiO2 nanoparticles

Hamciuc, Corneliu; Vlad‐Bubulac, Tăchiță; Serbezeanu, Diana; Hamciuc, Elena; Aflori, Magdalena; Lisă, Gabriela; Anghel, Ion; Şofran, Ioana-Emilia; Trofin, Aurel

doi:10.1016/j.jcomc.2020.100063

Cited by 8 publications

(16 citation statements)

References 33 publications

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“…This measurement allows for the calculation of parameters that describe the composite film’s surface and its capacity for absorption, such as free surface energy ( SV ), solid-liquid interfacial tension ( SL ), and work of adhesion ( Wa ). Detailed experimental setup and calculations were described in a previous publication [ 34 ].…”

Section: Methodsmentioning

confidence: 99%

“…Incorporating nanosized compounds like nano-ZnO, nano-TiO 2 , and nano-silica into the polymers has been proven in some studies to help improve the characteristics of the polymers [ 31 , 32 , 33 ]. In our recent paper, synergistic effects of the presence of silica nanoparticles and a polyphosphonate mixed into PVA matrix have been discussed [ 34 ].…”

Section: Introductionmentioning

confidence: 99%

“…TiO 2 is a versatile and chemically inert mineral with various pertinent uses (food, pharmaceutical, biomedical, antibacterial agent, environmental, and clean energy) [ 34 ]. Despite the fact that its use as a food additive has recently been questioned and even banned in the European Union, TiO 2′ s physicochemical, mechanical, and photocatalytic qualities, as well as its reactivity and thermal stability, low cost, secure manufacturing, and biocompatibility, all contribute to TiO 2′ s widespread application [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

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Fabrication of Poly(vinyl alcohol)/Chitosan Composite Films Strengthened with Titanium Dioxide and Polyphosphonate Additives for Packaging Applications

Vlad‐Bubulac¹,

Hamciuc²,

Rîmbu

et al. 2022

Gels

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Eco-innovation through the development of intelligent materials for food packaging is evolving, and it still has huge potential to improve food product safety, quality, and control. The design of such materials by the combination of biodegradable semi-synthetic polymers with natural ones and with some additives, which may improve certain functionalities in the targeted material, is continuing to attract attention of researchers. To fabricate composite films via casting from solution, followed by drying in atmospheric conditions, certain mass ratios of poly(vinyl alcohol) and chitosan were used as polymeric matrix, whereas TiO2 nanoparticles and a polyphosphonate were used as reinforcing additives. The structural confirmation, surface properties, swelling behavior, and morphology of the xerogel composite films have been studied. The results confirmed the presence of all ingredients in the prepared fabrics, the contact angle of the formulation containing poly(vinyl alcohol), chitosan, and titanium dioxide in its composition exhibited the smallest value (87.67°), whereas the profilometry and scanning electron microscopy enlightened the good dispersion of the ingredients and the quality of all the composite films. Antimicrobial assay established successful antimicrobial potential of the poly(vinyl alcoohol)/chitosan-reinforced composites films against Staphylococcus aureus, Methicillin-resistant Staphylococcus aureus (MRSA), Escherichia coli, Pseudomonas aeruginosa, and Candida albicans. Cytotoxicity tests have revealed that the studied films are non-toxic, presented good compatibility, and they are attractive candidates for packaging applications.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fabrication of Poly(vinyl alcohol)/Chitosan Composite Films Strengthened with Titanium Dioxide and Polyphosphonate Additives for Packaging Applications

Vlad‐Bubulac¹,

Hamciuc²,

Rîmbu

et al. 2022

Gels

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“…FTIR spectra of the thermosets were obtained by using the equipment described elsewhere. [47] F I G U R E 1 Preparation of PSFR…”

Section: Measurementsmentioning

confidence: 99%

“…Microscopic investigations of epoxy thermosets and of their corresponding chars were conducted on the equipment described in the previous paper. [47] The thermal analysis and DSC upon PSFR and epoxy thermosets were recorded using equipment and procedures presented in the previous work. [47] An FTT Micro Calorimeter was used to examine the flammability of PSFR and epoxy thermosets.…”

Section: Measurementsmentioning

confidence: 99%

Eco‐friendly flame retardant epoxy nanocomposites based on polyphosphonate and halloysite nanotubes

Hamciuc¹,

Vlad‐Bubulac²,

Serbezeanu³

et al. 2022

Vinyl Additive Technology

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The preparation of a novel polyphosphonate (PSFR) is described here, starting from phenylphosphonic dichloride and an equimolecular mixture containing equal amounts of two bisphenols, namely 4,4 0 -dihydroxydiphenyl sulfone and 2-(6-oxido-6H-dibenzo<1,2>oxaphosphorin-6-yl)-1,4-benzenediol, following the polycondensation reaction in solution. Then, new environmentalfriendly nanocomposites having improved flame retardancy have been prepared by incorporating PSFR and halloysite nanotubes (HNTs) into epoxy resin. The effect of PSFR and HNTs contents on the chemical and physical characteristics of epoxy nanocomposites was investigated. The success of the reactions was monitored by infrared spectroscopy (FTIR) while microscopic related techniques (SEM) gave information on the morphology of the products. The thermosets exhibit glass transition temperatures in the range of 62.4-97.1 C and thermal decomposition temperatures in the interval of 296-359 C. The appearance of the char residues obtained by pyrolysis was studied by SEM measurements. The flammability behavior has been studied by microscale combustion calorimetry (MCC) tests. A considerable improvement in the flame retardancy of the thermosets was obtained by simultaneous incorporation of HNTs (10 wt%) and PSFR (equivalent of 1 wt% P) into epoxy resin.

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Novel halogen‐free Si‐C‐P flame‐retarding coatings constructed by DOPO/flake graphite co‐doping silica fume‐based geopolymer

Wang

Zhao

2023

J of Applied Polymer Sci

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A facile design for value-added recycling of metallurgical solid waste is urgent for developing safe and sustainable human settlements. Therefore, novel DOPO/flake graphite (FG) co-doped silica fume-based geopolymer coatings for flame-retarding plywood were prepared to seek a halogen-free and low-carbon Si-C-P fireproof method. The results show that appropriate DOPO (1 wt%) constitutes an enhanced flame retardancy, evidenced by the reduced peak of heat release rate (decreases from 153.48 to 96.94 kW m À2 ) and the rising flame retardancy index (climbs from 1.00 to 2.32). Meanwhile, its pyrolysis is identified as the three-level chemical reaction model (F3), the hydrogen bond crosslinking between the P O C and HO Si O results in a rising E α at 1000-731 C (increases from 163.60 to 198.83 kJ mol À1 ). Finally, the synergistically flame-retardant mechanism consists of water volatilization at 100 C, the as-formed porous carbonaceous layer at about 200 C, transformations of DOPO at 300-500 C, the formed DOPO derivatives at 500-700 C, and the decomposition of DOPO derivatives (condensed phase barrier) above 700 C, respectively. The yielded residues generate a 56% formaldehyde adsorption rate. It proposes a halogen-free and low-carbon strategy for designing Si-C-P hybrid flame-retarding coatings, indicating an ecological direction for the value-added utilization of metallurgical solid waste.

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Tailoring thermal and flame retardant properties via synergistic effect in polyvinyl alcohol nanocomposites based on polyphosphonate and/or SiO2 nanoparticles

Cited by 8 publications

References 33 publications

Fabrication of Poly(vinyl alcohol)/Chitosan Composite Films Strengthened with Titanium Dioxide and Polyphosphonate Additives for Packaging Applications

Fabrication of Poly(vinyl alcohol)/Chitosan Composite Films Strengthened with Titanium Dioxide and Polyphosphonate Additives for Packaging Applications

Eco‐friendly flame retardant epoxy nanocomposites based on polyphosphonate and halloysite nanotubes

Novel halogen‐free Si‐C‐P flame‐retarding coatings constructed by DOPO/flake graphite co‐doping silica fume‐based geopolymer

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