Natural Sunscreens Based on Nanoparticles of Modified Kraft Lignin (CatLignin)

Petri Widsten; Tarja Tamminen; Tiina Liitiä

doi:10.1021/acsomega.0c01742

Natural Sunscreens Based on Nanoparticles of Modified Kraft Lignin (CatLignin)

Petri Widsten (Corresponding Author), Tarja Tamminen, Tiina Liitiä

BA5404 Lignin and sidestream valorization

Research output: Contribution to journal › Article › Scientific › peer-review

40 Citations (Scopus)

42 Downloads (Pure)

Abstract

Commercial chemical sunscreens have a high content of synthetic ultraviolet (UV) actives that have caused widespread damage to marine ecosystems and may have adverse health effects in humans. In the present work, safer bio-based sunscreens with lignin UV absorbers were developed to address this issue. Partly demethylated and otherwise altered kraft lignins, the so-called CatLignins with abundant phenolic hydroxyl auxochromes and catechol units, outperformed regular kraft lignins as sunscreen UV absorbers in terms of sun protection factor (UVB–SPF) and UVA–UVB transmittance. Converting lignins to nanoparticles significantly enhanced sunscreen performance. The best lignin sunscreen, containing nanoparticles of hardwood CatLignin, had a UV transmittance of only 0.5–3.8% over the entire UVA–UVB region compared to 2.7–51.1% of a commercial SPF 15 sunscreen. Lignin-based sunscreens are particularly suitable for dark-tinted SPF cosmetics.

Original language	English
Pages (from-to)	13438-13446
Number of pages	9
Journal	ACS Omega
Volume	5
Issue number	22
Early online date	20 May 2020
DOIs	https://doi.org/10.1021/acsomega.0c01742
Publication status	Published - 9 Jun 2020
MoE publication type	A1 Journal article-refereed

Keywords

Hydroxyls
Hydrocarbons
Aromatic compounds
Biopolymers
Organic polymers

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/acsomega.0c01742Licence: CC BY

acsomega.0c01742Accepted author manuscript, 1.75 MB

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title = "Natural Sunscreens Based on Nanoparticles of Modified Kraft Lignin (CatLignin)",

abstract = "Commercial chemical sunscreens have a high content of synthetic ultraviolet (UV) actives that have caused widespread damage to marine ecosystems and may have adverse health effects in humans. In the present work, safer bio-based sunscreens with lignin UV absorbers were developed to address this issue. Partly demethylated and otherwise altered kraft lignins, the so-called CatLignins with abundant phenolic hydroxyl auxochromes and catechol units, outperformed regular kraft lignins as sunscreen UV absorbers in terms of sun protection factor (UVB–SPF) and UVA–UVB transmittance. Converting lignins to nanoparticles significantly enhanced sunscreen performance. The best lignin sunscreen, containing nanoparticles of hardwood CatLignin, had a UV transmittance of only 0.5–3.8% over the entire UVA–UVB region compared to 2.7–51.1% of a commercial SPF 15 sunscreen. Lignin-based sunscreens are particularly suitable for dark-tinted SPF cosmetics.",

keywords = "Hydroxyls, Hydrocarbons, Aromatic compounds, Biopolymers, Organic polymers",

author = "Petri Widsten and Tarja Tamminen and Tiina Liiti{\"a}",

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AU - Widsten, Petri

AU - Tamminen, Tarja

AU - Liitiä, Tiina

PY - 2020/6/9

Y1 - 2020/6/9

N2 - Commercial chemical sunscreens have a high content of synthetic ultraviolet (UV) actives that have caused widespread damage to marine ecosystems and may have adverse health effects in humans. In the present work, safer bio-based sunscreens with lignin UV absorbers were developed to address this issue. Partly demethylated and otherwise altered kraft lignins, the so-called CatLignins with abundant phenolic hydroxyl auxochromes and catechol units, outperformed regular kraft lignins as sunscreen UV absorbers in terms of sun protection factor (UVB–SPF) and UVA–UVB transmittance. Converting lignins to nanoparticles significantly enhanced sunscreen performance. The best lignin sunscreen, containing nanoparticles of hardwood CatLignin, had a UV transmittance of only 0.5–3.8% over the entire UVA–UVB region compared to 2.7–51.1% of a commercial SPF 15 sunscreen. Lignin-based sunscreens are particularly suitable for dark-tinted SPF cosmetics.

AB - Commercial chemical sunscreens have a high content of synthetic ultraviolet (UV) actives that have caused widespread damage to marine ecosystems and may have adverse health effects in humans. In the present work, safer bio-based sunscreens with lignin UV absorbers were developed to address this issue. Partly demethylated and otherwise altered kraft lignins, the so-called CatLignins with abundant phenolic hydroxyl auxochromes and catechol units, outperformed regular kraft lignins as sunscreen UV absorbers in terms of sun protection factor (UVB–SPF) and UVA–UVB transmittance. Converting lignins to nanoparticles significantly enhanced sunscreen performance. The best lignin sunscreen, containing nanoparticles of hardwood CatLignin, had a UV transmittance of only 0.5–3.8% over the entire UVA–UVB region compared to 2.7–51.1% of a commercial SPF 15 sunscreen. Lignin-based sunscreens are particularly suitable for dark-tinted SPF cosmetics.

KW - Hydroxyls

KW - Hydrocarbons

KW - Aromatic compounds

KW - Biopolymers

KW - Organic polymers

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M3 - Article

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SN - 2470-1343

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JO - ACS Omega

JF - ACS Omega

IS - 22

ER -

Natural Sunscreens Based on Nanoparticles of Modified Kraft Lignin (CatLignin)

Abstract

Keywords

UN SDGs

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