Cellulose nanofibrils as filler for adhesives: effect on specific fracture energy of solid wood-adhesive bonds.

Cellulose (Lond) · 2011 · PMC4579863 · PMID 26412949

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a clear trendno p-value reported

A detailed analysis of results obtained for UF-1 reveals a clear trend of increasing toughness with increasing content of unmodified fibrils (P1).

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.