This study attempts to clarify thermodynamic quantification on interaction between poly(vinyl alcohol) (PVA) and wood-derived cellulose nanofibrils (CNFs) obtained by aqueous counter collision (ACC) method. Aqueous mixtures of PVA/ACC-CNFs with various fiber widths were cast as the target materials. The interfacial interactions between the two components were characterized through thermodynamic evaluation of the crystalline PVA component as a probe in the cast mixture. As the result, surface properties of the ACC-CNFs found to reflect on the crystallization behavior of the interacted PVA component, resulting in dual nano-size effects of either diluent or nucleating agent. Melting point depression behaviors of the PVA component indicated that ACC-CNFs with thinner widths induced nucleation effects on PVA crystallization, whereas ACC-CNFs with ca. 100 nm in width encouraged diluent effects on PVA components. It is noted that this trend found to be reverse to the case for PVA/ACC-CNFs of bacterial nanocellulose previously reported.

中文翻译：

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表征ACC纤维素纳米原纤维对亲水性聚乙烯醇结晶行为的双重纳米尺寸效应

这项研究试图阐明热力学定量分析聚乙烯醇（PVA）与通过水反冲撞（ACC）方法获得的木材衍生的纤维素纳米原纤维（CNF）之间的相互作用。将具有各种纤维宽度的PVA / ACC-CNF的水性混合物浇铸为目标材料。通过热力学评估结晶PVA组分作为浇铸混合物中的探针，可以表征两种组分之间的界面相互作用。结果，发现ACC-CNF的表面性质反映了相互作用的PVA组分的结晶行为，从而导致了稀释剂或成核剂的双重纳米尺寸效应。PVA组分的熔点降低行为表明，宽度较窄的ACC-CNF诱导了PVA结晶的成核作用，而ACC-CNF的宽度约为。宽度为100 nm有助于稀释剂对PVA组分的作用。注意，发现这种趋势与先前报道的细菌纳米纤维素的PVA / ACC-CNF的情况相反。