Lignin nanoparticles modified with tall oil fatty acid for cellulose functionalization

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • VTT Technical Research Centre of Finland

Abstract

In this study, tall oil fatty acid ester of softwood kraft lignin (TOFA-L) was used to prepare TOFA lignin nanoparticles (TLNP) in water. The average diameters for two prepared TLNPs in 0.1 mg/ml concentration were 140 nm and 160 nm. TLNPs were attached covalently onto modified and unmodified cellulose fibres to form an antimicrobial composite material. The modified cellulose fibres contained reactive allylic double bonds with a degree of substitution of 0.05. The antimicrobial properties of both TLNPs and TLNP coated fibres (TLNP-C) were studied against Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa using silver nanospheres (average size 10 nm) and Lignoboost lignin particles with 300 and 400 nm sizes as references. Antimicrobial activity of the samples was stronger against Gram-positive S. aureus cells than against Gram-negative target microbes E. coli and P. aeruginosa.

Details

Original languageEnglish
Pages (from-to)273-284
Number of pages12
JournalCellulose
Volume27
Issue number1
Publication statusPublished - 1 Jan 2020
MoE publication typeA1 Journal article-refereed

    Research areas

  • Lignin, Nanoparticles, Cellulose, Fatty acid, Allylation, METHYL-METHACRYLATE, GRAFTING EFFICIENCY, ALKYD RESINS, KRAFT, SOFTWOOD, FRACTIONATION, ANTIOXIDANT, DERIVATIVES, ADSORPTION, STARCH

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