Cellulose-Nanofiber-Reinforced Rubber Composites with Resorcinol Resin Prepared by Elastic Kneading,Macromolecular Materials and Engineering

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Cellulose-Nanofiber-Reinforced Rubber Composites with Resorcinol Resin Prepared by Elastic Kneading
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2021-08-25 , DOI: 10.1002/mame.202100483
Toru Noguchi ₁ , Yasuo Bamba _{1,

2} , Takashi Miura ₁ , Rie Iwamoto ₁ , Morinobu Endo ₁ , Akira Isogai _{1,

3}

Affiliation

A resorcinol resin/water dispersion and a rubber latex are added to 1% 2,2,6,6,-tetramethylpyperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TEMPO-CNFs) dispersed in water, followed by oven drying at 40 °C for 20 h to prepare a dried TEMPO-CNF/resorcinol resin/latex rubber (DTRL) mixture with a weight ratio of 1/0.5/3. DTRL is then added to a nitrile-butadiene rubber (NBR) or a carboxy group-containing NBR (X-NBR) sheet, and the mixture is kneaded by a two-roll mill at 20–30 °C with high shear forces. The tensile strength and Young's modulus of the crosslinked DTRL/rubber composite sheets remarkably increased from 10 and 12 MPa, respectively, for the reference sheet to 24 and 82 MPa, respectively, for the DTRL/rubber composite sheets containing ≈10 vol% TEMPO-CNFs. Scanning electron microscopy revealed that no TEMPO-CNF agglomerates are present in the DTRL/rubber composite sheets. The tensile properties of the composite sheets are the best when a X-NBR sheet and NBR latex are used as the matrix rubber and latex in DTRL preparation, respectively. When water-extracted DTRL (WDTRL, mass recovery ratio ≈94%) is used in place of DTRL, the WDTRL/rubber composite sheets show sufficient water resistance, while the tensile properties are almost the same as those of the DTRL/rubber composite sheets.

中文翻译：

弹性捏合制备间苯二酚树脂纤维素-纳米纤维增强橡胶复合材料

将间苯二酚树脂/水分散体和橡胶胶乳加入到分散在水中的 1% 2,2,6,6,-四甲基吡啶-1-氧基 (TEMPO)-氧化纤维素纳米纤维 (TEMPO-CNF) 中，然后在40 °C 20 小时，制备重量比为 1/0.5/3 的干燥 TEMPO-CNF/间苯二酚树脂/乳胶橡胶 (DTRL) 混合物。然后将 DTRL 添加到丁腈橡胶 (NBR) 或含羧基的丁腈橡胶 (X-NBR) 片材中，混合物在 20–30 °C 下通过双辊磨机在高剪切力下捏合。交联的 DTRL/橡胶复合片材的拉伸强度和杨氏模量分别从参考片材的 10 MPa 和 12 MPa 显着增加到含有 ≈10 vol% TEMPO-的 DTRL/橡胶复合片材的 24 MPa 和 82 MPa。 CNF。扫描电子显微镜显示在 DTRL/橡胶复合片材中不存在 TEMPO-CNF 附聚物。X-NBR片材和NBR胶乳分别作为基体橡胶和DTRL制备胶乳时，复合片材的拉伸性能最好。当使用水提取的DTRL（WDTRL，质量回收率≈94%）代替DTRL时，WDTRL/橡胶复合片材表现出足够的耐水性，而拉伸性能与DTRL/橡胶复合片材几乎相同.

更新日期：2021-08-25

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