Light Color Dihydroxybenzophenone Grafted Lignin with High UVA/UVB Absorbance Ratio for Efficient and Safe Natural Sunscreen

Wu, Ying; Qian, Yong; Zhang, Ai‐Cheng; Li, Hongming; Yang, Dongjie; Qiu, Xueqing

doi:10.1021/acs.iecr.9b06970

Cited by 59 publications

(27 citation statements)

References 43 publications

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“…The overall reinforcing effect of the lignin-derived char filler was comparable with that of commercial carbon black [26]. Additionally, research concentrating on utilizing dihydroxybenzophenone-grafted lignin with high UV absorbance was described, and the obtained product showed great promise as an alternative for commercial sunscreens [27]. The intrinsic absorption abilities of lignin were further enhanced by either introduction of the calcium counter-ions [28] or grafting with poly (acrylic acid) [29].…”

Section: Introductionmentioning

confidence: 93%

Chemical Transformation of Lignosulfonates to Lignosulfonamides with Improved Thermal Characteristics

Komisarz

Majka

2022

Fibers

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Lignin is an abundantly occurring aromatic biopolymer that receives increasing attention as, e.g., a biofiller in polymer composites. Though its structure depends on the plant source, it is a valuable component showing biodegradability, antioxidant, and ultra-violet (UV) absorption properties. Lignosulfonates, a by-product of the paper and pulping industries formed as a result of the implementation of the sulfite process, have been used in the presented study as a raw material to obtain a sulfonamide derivative of lignin. Hereby, a two-step modification procedure is described. The obtained materials were investigated by means of FTIR, WAXD, SS-NMR, SEM, and TGA; the results of spectroscopic investigations confirm the formation of a sulfonamide derivative of lignin via the proposed modification method. The obtained modified lignin materials showed significantly improved thermal stability in comparison with the raw material. The internal structure of the lignosulfonate was not altered during the modification process, with only slight changes of the morphology, as confirmed by the WAXD and SEM analyses. The manufactured sulfonamide lignin derivatives show great promise in the potential application as an antibacterial filler in advanced biopolymeric composites.

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Section: Introductionmentioning

confidence: 93%

Chemical Transformation of Lignosulfonates to Lignosulfonamides with Improved Thermal Characteristics

Komisarz

Majka

2022

Fibers

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“…Purified TOCNF–DHP MPs were freeze-dried to obtain solid MPs in powder form. In general, natural lignin is a dark brown color, which causes practical problems in cosmetic use [ 61 ]. However, the DHP MP powder had a creamy white color, as shown in the insets of Figure 6 a–d.…”

Section: Resultsmentioning

confidence: 99%

Enzymatic Preparation and Characterization of Spherical Microparticles Composed of Artificial Lignin and TEMPO-Oxidized Cellulose Nanofiber

2021

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A one-pot and one-step enzymatic synthesis of submicron-order spherical microparticles composed of dehydrogenative polymers (DHPs) of coniferyl alcohol as a typical lignin precursor and TEMPO-oxidized cellulose nanofibers (TOCNFs) was investigated. Horseradish peroxidase enzymatically catalyzed the radical coupling of coniferyl alcohol in an aqueous suspension of TOCNFs, resulting in the formation of spherical microparticles with a diameter and sphericity index of approximately 0.8 μm and 0.95, respectively. The ζ-potential of TOCNF-functionalized DHP microspheres was about −40 mV, indicating that the colloidal systems had good stability. Nanofibrous components were clearly observed on the microparticle surface by scanning electron microscopy, while some TOCNFs were confirmed to be inside the microparticles by confocal laser scanning microscopy with Calcofluor white staining. As both cellulose and lignin are natural polymers known to biodegrade, even in the sea, these woody TOCNF−DHP microparticle nanocomposites were expected to be promising alternatives to fossil resource-derived microbeads in cosmetic applications.

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“…High-internal phase emulsions (HIPEs) could carry high concentrations of hydrophobically bioactive compounds due to their ultrahigh internal phase volume (>74 vol %) and have been widely used in food, medicine, and cosmetics. , Lignin is the second-largest biomass resource. It has good biocompatibility and excellent UV absorption and antioxidant properties; in recent years, it has been widely used as sunscreens and antioxidants for environmentally sensitive drugs. − Therefore, the design and construction of intelligent lignin-based HIPEs to improve their efficacy and reduced environmental AVM pollution are greatly significant. However, the low water solubility and poor environmental sensitivity such as the pH value of lignin limit the preparation of intelligent HIPEs.…”

Section: Introductionmentioning

confidence: 99%

Basic Amino Acid-Modified Lignin-Based Biomass Adjuvants: Synthesis, Emulsifying Activity, Ultraviolet Protection, and Controlled Release of Avermectin

et al. 2021

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Avermectin (AVM) is a highly effective and safe biopesticide but is very sensitive to ultraviolet (UV) light and exhibits poor water solubility. Developing green and multifunctional adjuvants is important for the protection and controlled release of AVM. In this work, a number of water-soluble enzymatic hydrolysis lignins (W-EHLs) were prepared via grafting basic amino acids and used as emulsifiers with co-surfactants to prepare high-internal phase emulsions (HIPEs). The results showed that W-EHLs with co-surfactants could be prepared with HIPEs that contained 90 vol % green oil phases such as turpentine, and the stability of the HIPEs first increased and then decreased when the rate of grafting of basic amino acids on lignin increased from 0.26 to 1.46 mmol/g. The more polar oil droplets were less deformable due to their higher viscosity, thereby affording a stability advantage to HIPEs. Subsequently, the relations between the stability and interfacial viscoelasticity of the emulsion were effectively correlated by interfacial rheology, droplet size, and physical stability tests. The results showed that HIPEs with smaller droplets had poor fluidity and strong interfacial viscoelasticity due to their higher droplet packing density, which resulted in good macroscopic stability. Like the AVM carrier, the retention rate of AVM in HIPEs was 80.1% after UV radiation for 72 h, which represented the highest UV protection efficiency in AVM delivery systems. The release curves showed that the rate of release of AVM from HIPEs was adjusted by controlling the pH value of the medium. In addition, the release of HIPEs is completely in accord with both diffusion and the matrix erosion mechanism. The strategy could be extended to other sensitive pesticides and used to promote the development of sustainable agriculture.

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Light Color Dihydroxybenzophenone Grafted Lignin with High UVA/UVB Absorbance Ratio for Efficient and Safe Natural Sunscreen

Cited by 59 publications

References 43 publications

Chemical Transformation of Lignosulfonates to Lignosulfonamides with Improved Thermal Characteristics

Chemical Transformation of Lignosulfonates to Lignosulfonamides with Improved Thermal Characteristics

Enzymatic Preparation and Characterization of Spherical Microparticles Composed of Artificial Lignin and TEMPO-Oxidized Cellulose Nanofiber

Basic Amino Acid-Modified Lignin-Based Biomass Adjuvants: Synthesis, Emulsifying Activity, Ultraviolet Protection, and Controlled Release of Avermectin

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