Hydrogen‐bonding assembly of heteropolyacid and poly(vinyl alcohol) for strong, flexible, and transparent UV‐protective films

Zhang, Ziang; Chen, Kui; Tang, Qun; Li, Heping; Zou, Zhiming

doi:10.1002/app.48813

Cited by 14 publications

(10 citation statements)

References 69 publications

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“…This phenomenon occurs because the introduction of carboxyl groups and cross-linking significantly reduces crystallinity. Meanwhile, the diffraction peaks further decrease after the addition of GA, suggesting that the crystallinity of the composite films decrease because of the formation of hydrogen-bonds between GA and PVA …”

Section: Resultsmentioning

confidence: 99%

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PVA/Poly(hexamethylene guanidine)/Gallic Acid Composite Hydrogel Films and Their Antibacterial Performance

Yang

Wang

Sha

et al. 2021

ACS Appl. Polym. Mater.

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Carboxylated poly(vinyl alcohol) (PVA-COOH) is prepared by modifying PVA with succinic anhydride. Then, poly(hexamethylene guanidine (PHMG) as a cross-linker and gallic acid (GA) as an antioxidant are added to obtain PVA-based composite hydrogel films (PVA-COOH-PHMG/GA). The as-prepared PVA-based composite films show hydrophilic surfaces, high swelling ratios of 600–700%, low water solubility for PVA-COOH-PHMG samples (about 10%), and good mechanical properties. Importantly, when the initial bacterial concentration is 107 CFU/mL, the antibacterial rate of PVA-based composite films against Escherichia coli and Staphylococcus aureus can reach 99.999%. When the initial bacterial concentration is 108 CFU/mL, the antibacterial rates of these composite films against E. coli and S. aureus can be 99.9999% and 99.988%, respectively. The antibacterial mechanism is also discussed via a live/dead bacteria assay. The cytotoxicity test reveals that the resultant PVA-COOH-PHMG composite hydrogel films without GA have good biocompatibility toward L929 cells, but PVA-COOH-PHMG/GA composite films with addition of GA decrease the cell viability. Interestingly, the PVA-COOH-PHMG/GA composite hydrogel films can scavenge 70% of 1,1-diphenyl-2-picryhydrazyl (DPPH) free radical because of the release of GA, indicating an excellent antioxidant efficiency. It is anticipated that the resultant PVA-based composite hydrogel films with an adequate amount of GA not only possess excellent antibacterial properties but also exhibit a good antioxidant activity. Therefore, they show potential for biomedical field applications as wound dressings.

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Section: Resultsmentioning

confidence: 99%

“…Meanwhile, the diffraction peaks further decrease after the addition of GA, suggesting that the crystallinity of the composite films decrease because of the formation of hydrogen-bonds between GA and PVA. 37 3.3. Swelling Ratio, Water Solubility, and Water Contact Angle.…”

Section: Resultsmentioning

confidence: 99%

PVA/Poly(hexamethylene guanidine)/Gallic Acid Composite Hydrogel Films and Their Antibacterial Performance

Yang

Wang

Sha

et al. 2021

ACS Appl. Polym. Mater.

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“…Another approach showed that specific interactions between the polymer matrix and the NPs resulted in improved UV shielding and tensile strength. 151 The authors chose silicomolybdic acid (SiMoA) (containing an oxygen group) as the UV-absorbing NP and PVA as the matrix. The PVA/SiMoA composite was fabricated using solution casting.…”

Section: Solution Castingmentioning

confidence: 99%

An overview of recent advances in polymer composites with improved UV‐shielding properties

Muzata

Gebrekrstos

Orasugh

et al. 2023

J of Applied Polymer Sci

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Owing to their competitive price, ease of processability, and rust resistance, polymers are the most extensively used materials in everyday life. However, consistent exposure to ultraviolet (UV) radiation can lead to the degradation and discoloration of polymeric materials. Various polymer composites containing inorganic and organic nanoparticles (NPs) have been developed to improve the UV‐shielding properties of neat polymers. However, the most used UV‐shielding inorganic NPs are prone to photocatalytic processes, leading to further polymer chain degradation. To overcome this challenge, organic NPs have been used; however, they easily agglomerate, decreasing the UV‐shielding performance of the polymer composites. Herein, we critically report the fundamentals of the UV‐shielding mechanism and the synthesis methods, surface modification, and characterization of the most important inorganic and organic UV‐shielding NPs. We then summarize the various processing techniques used to disperse NPs in polymer matrices to obtain polymer composites with improved UV‐shielding properties. Finally, we propose a broader understanding of how the NP characteristics, their interaction with polymer matrices, and the various processing methods affect the UV‐shielding performance of the obtained polymer composites. In addition, various applications of inorganic and organic NPs‐containing UV‐shielding polymer composites have been reported.

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“…30,31 On the other hand, PVA has high ultraviolet (UV) radiation transmittance, so it is not suitable for UV-protective material as used alone. 32 Numerous studies have been conducted on the development of UV-protective PVA products in order to increase the UV-shielding ability of PVA. Modifying the properties of PVA-based materials through blending with specific fillers is a straightforward and efficient method.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, UV protection, and antibacterial properties of poly(vinyl alcohol)/marine mucilage biocomposite films

Soydan,

Gumus,

Yilmaz

2023

Vinyl Additive Technology

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The mucilage that accumulated in the Sea of Marmara in 2021 turned into an environmental disaster that threatened not only marine life but also the shipping and tourism industries. However, because of the partially organic structure of marine mucilage, it has the potential to be used as an additive for polymer films. In this study, bioplastic films were prepared from PVA with a series of mucilage content from 0% to 50% by mass, and their properties were investigated. The FT‐IR spectra revealed a shift in hydroxyl peaks, suggesting an interaction between the mucilage and PVA. SEM images showed the formation of crystal forms at the higher mucilage content of 20%, indicating ionic saturation of the PVA matrix. EDX and XRD analyses revealed that the crystal was NaCl coming from the mucilage composition. The tensile strength of the neat PVA film was measured as 9.86 MPa and improved to 14.56 MPa with 5% mucilage content, which is attributed to the ionic cross‐linking. The tensile properties were preserved up to 20% of the mucilage content, and then sudden decrements were observed. The transmittance percentage (T%) of the neat PVA film in UV–Vis spectra (800–200 nm) was detected as 75% at 500 nm and decreased down to 39% with increased mucilage content up to 50%. Furthermore, a rising limit of linearity (LOL) of the spectrums was observed from 350 to 580 nm, with increasing mucilage content from 5% to 50%. The biofilms showed antibacterial activity against Escherichia coli and Staphylococcus aureus bacteria. Hence, a robust and biodegradable film having UV protection and antibacterial activity was developed from the marine mucilage bio‐waste.Highlights Poly(vinyl alcohol)/marine mucilage biocomposite films were prepared. Biocomposite films showed increased UV‐A, UV‐B, and UV‐C protection with increased mucilage content. Enhanced tensile strength of biocomposite films up to 20 wt% mucilage content was determined due to ionic crosslink formed by NaCl salt ions. Biocomposite exhibited antibacterial activity against Escherichia coli and Staphylococcus aureus.

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Hydrogen‐bonding assembly of heteropolyacid and poly(vinyl alcohol) for strong, flexible, and transparent UV‐protective films

Cited by 14 publications

References 69 publications

PVA/Poly(hexamethylene guanidine)/Gallic Acid Composite Hydrogel Films and Their Antibacterial Performance

PVA/Poly(hexamethylene guanidine)/Gallic Acid Composite Hydrogel Films and Their Antibacterial Performance

An overview of recent advances in polymer composites with improved UV‐shielding properties

Mechanical, UV protection, and antibacterial properties of poly(vinyl alcohol)/marine mucilage biocomposite films

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