Ecofriendly UV-protective films based on poly(propylene carbonate) biocomposites filled with TiO2 decorated lignin

Wu, Wei; Liu, Tao; Deng, Xueqin; Sun, Qijun; Cao, Xianwu; Feng, Yi; Wang, Bin; Roy, Vellaisamy A. L.; Li, Robert K.Y.

doi:10.1016/j.ijbiomac.2018.12.273

Cited by 65 publications

(38 citation statements)

References 33 publications

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“…The char residue of lignin-TiO2@NFC at 600 ℃ was 68.1 wt%, which indicated that the lignin-TiO2@NFC had better thermal stability, and the load of lignin-TiO2@NFC was approximately 31.9%. The results showed that the thermal stability of lignin-TiO2@NFC was similar to that reported by Wu et al (2019) but differed from that of TiO2@NFC and lignin, which showed a relatively stable decline. This indicated that lignin-TiO2@NFC was not simply a physical combination of TiO2@NFC and lignin but rather a stable chemical bond.…”

Section: Thermal Analysissupporting

confidence: 65%

Preparation and characterization of lignin-TiO2 UV-shielding composite material by induced synthesis with nanofibrillated cellulose

Guo

Zhang

Sha

et al. 2020

BioRes

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It is desirable to develop biodegradable ultraviolet (UV)-shielding materials from renewable resources, as the demand for sustainability is ever increasing. In this work, a novel lignin-TiO2 UV-shielding composite was synthesized successfully via a hydrothermal method induced by nanofibrillated cellulose (NFC). Comprehensive characterization showed that the lignin-TiO2@NFC composite induced by NFC had good nanoparticle size, shape, and thermal stability. The sunscreen performance of lignin-TiO2@NFC was investigated via mixture with unmodified hand cream. The UV-visible (vis) transmission spectra results revealed that the unmodified cream with 10 wt% lignin-TiO2@NFC absorbed approximately 90% of UV light in the full UV band (200 nm to 400 nm), which indicated that lignin-TiO2@NFC had a good UV-shielding ability.

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Section: Thermal Analysissupporting

confidence: 65%

Preparation and characterization of lignin-TiO2 UV-shielding composite material by induced synthesis with nanofibrillated cellulose

Guo

Zhang

Sha

et al. 2020

BioRes

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“…The transmittance of pure PECA films ranges from 0 to 55% within UVC, from 55 to 90% within UVB and remains constant at 90% within UVA range. PPC, on the other hand, transmits more than 85% of all UV radiation (not shown here for brevity) and is prone to rapid photo-induced degradation [ 51 ]. As seen in Figure 5 a, compounding 2.5% PPC in PECA causes just a slight reduction in UV transmission.…”

Section: Resultsmentioning

confidence: 99%

UV-Blocking, Transparent, and Antioxidant Polycyanoacrylate Films

2020

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Applications of cyanoacrylate monomers are generally limited to adhesives/glues (instant or superglues) and forensic sciences. They tend to polymerize rapidly into rigid structures when exposed to trace amounts of moisture. Transforming cyanoacrylate monomers into transparent polymeric films or coatings can open up several new applications, as they are biocompatible, biodegradable and have surgical uses. Like other acrylics, cyanoacrylate polymers are glassy and rigid. To circumvent this, we prepared transparent cyanoacrylate films by solvent casting from a readily biodegrade solvent, cyclopentanone. To improve the ductility of the films, poly(propylene carbonate) (PPC) biopolymer was used as an additive (maximum 5 wt.%) while maintaining transparency. Additionally, ductile films were functionalized with caffeic acid (maximum 2 wt.%), with no loss of transparency while establishing highly effective double functionality, i.e., antioxidant effect and effective UV-absorbing capability. Less than 25 mg antioxidant caffeic acid release per gram film was achieved within a 24-h period, conforming to food safety regulations. Within 2 h, films achieved 100% radical inhibition levels. Films displayed zero UVC (100–280 nm) and UVB (280–315 nm), and ~15% UVA (315–400 nm) radiation transmittance comparable to advanced sunscreen materials containing ZnO nanoparticles or quantum dots. Transparent films also exhibited promising water vapor and oxygen barrier properties, outperforming low-density polyethylene (LPDE) films. Several potential applications can be envisioned such as films for fatty food preservation, biofilms for sun screening, and biomedical films for free-radical inhibition.

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“…Additionally, as they do not cause cytotoxicity, lignin-based products could be applied for biomedical purposes [ 99 ]. In this context, lignin is a widely used bio-based UV-blocking material owing to its UV-absorbing phydroxyphenyl, guaiacyl, and syringyl phenylpropanoid units [ 99 , 102 ].…”

Section: Natural Anti-cancer Agents For Skin Cancermentioning

confidence: 99%

Regenerative Wound Dressings for Skin Cancer

Pavel

Chircov

Rădulescu

et al. 2020

Cancers

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Skin cancer is considered the most prevalent cancer type globally, with a continuously increasing prevalence and mortality growth rate. Additionally, the high risk of recurrence makes skin cancer treatment among the most expensive of all cancers, with average costs estimated to double within 5 years. Although tumor excision is the most effective approach among the available strategies, surgical interventions could be disfiguring, requiring additional skin grafts for covering the defects. In this context, post-surgery management should involve the application of wound dressings for promoting skin regeneration and preventing tumor recurrence and microbial infections, which still represents a considerable clinical challenge. Therefore, this paper aims to provide an up-to-date overview regarding the current status of regenerative wound dressings for skin cancer therapy. Specifically, the recent discoveries in natural biocompounds as anti-cancer agents for skin cancer treatment and the most intensively studied biomaterials for bioactive wound dressing development will be described.

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Ecofriendly UV-protective films based on poly(propylene carbonate) biocomposites filled with TiO2 decorated lignin

Cited by 65 publications

References 33 publications

Preparation and characterization of lignin-TiO2 UV-shielding composite material by induced synthesis with nanofibrillated cellulose

Preparation and characterization of lignin-TiO2 UV-shielding composite material by induced synthesis with nanofibrillated cellulose

UV-Blocking, Transparent, and Antioxidant Polycyanoacrylate Films

Regenerative Wound Dressings for Skin Cancer

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