We synthesized cellulose nanofiber (CNF) modified with 9,9′-bis(aryl)fluorene, which has cardo moieties (BCNF), and evaluated the properties of its polyamide 6/66 (PA) composites. As a result, it was revealed that BCNF was well dispersed in PA and had a strong reinforcing effect—even in a temperature range above the glass transition temperature—compared with unmodified CNF due to the high interface affinity between BCNF and PA. We synthesized cellulose nanofiber (CNF) modified with 9,9′-bis(aryl)fluorene, possessing cardo moieties (BCNF), and evaluated the properties of its polyamide 6/66 (PA) composites. As a result, it was revealed that BCNF was well dispersed in PA and had a strong reinforcing effect—even in a temperature range above the glass transition temperature—compared with unmodified CNF. This is attributed to the improvement of the interface affinity between BCNF and PA derived from the bulky and hydrophobic structure of BPFG.

中文翻译：

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用 9,9'-双（芳基）芴改性纤维素纳米纤维增强聚酰胺 6/66

我们合成了经 9,9'-双（芳基）芴改性的纤维素纳米纤维（CNF），该纤维具有卡多部分（BCNF），并评估了其聚酰胺 6/66（PA）复合材料的性能。结果表明，由于 BCNF 和 PA 之间的高界面亲和力，与未改性的 CNF 相比，BCNF 可以很好地分散在 PA 中，并且即使在高于玻璃化转变温度的温度范围内也具有很强的增强作用。我们合成了 9,9'-双（芳基）芴改性的纤维素纳米纤维（CNF），具有cardo部分（BCNF），并评估了其聚酰胺6/66（PA）复合材料的性能。结果表明，与未改性的 CNF 相比，BCNF 在 PA 中分散良好，具有很强的增强作用——即使在高于玻璃化转变温度的温度范围内。