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首页> 外文期刊>ACS Omega >Nanofibrillated Bacterial Cellulose Modified with (3-Aminopropyl)trimethoxysilane under Aqueous Conditions: Applications to Poly(methyl methacrylate) Fiber-Reinforced Nanocomposites
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Nanofibrillated Bacterial Cellulose Modified with (3-Aminopropyl)trimethoxysilane under Aqueous Conditions: Applications to Poly(methyl methacrylate) Fiber-Reinforced Nanocomposites

机译：在水性条件下用（3-氨基丙基）三甲氧基硅烷改性纳米纤化细菌纤维素：应用于聚（甲基丙烯酸甲酯）纤维增强纳米复合材料的应用

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The development of eco-friendly fiber-reinforced composite resins is an important objective from an environmental perspective, and nanofibrillated bacterial cellulose (NFBC), with extremely long high-aspect-ratio fibers, is a filler material with high potential for use in such composite resins. In this study, we investigated chemical modification of the surfaces of NFBC fibers by coupling with (3-aminopropyl)trimethoxysilane and fabricated nanocomposite materials using the prepared surface-modified NFBC. The product prepared by the one-pot reaction of (3-aminopropyl)trimethoxysilane with NFBC microfibrils dispersed in aqueous acid retained the same nanofibril structure as the intact NFBC. The degree of molar substitution and the silicon states on the surface of the product depended on the NFBC/(3-aminopropyl)trimethoxysilane ratio. The thermal analysis revealed that the thermal degradation temperature of the products increases with an increase of degree of molar substitution. Highly transparent (78–89% at 600 nm) poly(methyl methacrylate)-based nanocomposites were prepared by solvent casting; the nanocomposite containing 1.0 wt % (3-aminopropyl)trimethoxysilylated NFBC was only 8% less transparent than neat poly(methyl methacrylate) at 600 nm. In addition, the tensile strength of the nanocomposite was more than twice that of neat poly(methyl methacrylate) when 1 wt % of the surface-modified NFBC was added. The surface-modified NFBC is expected to be a reinforcing nanofiber material that imparts excellent physical properties to fiber-reinforced resins.
机译：环保纤维增强复合材料树脂的发展是环境视角的重要目标，纳米纤细化细菌纤维素（NFBC）具有极长的高纵横比纤维，是具有高潜力的填料材料，用于这种复合材料树脂。在这项研究中，我们通过与（3-氨基丙基）三甲氧基硅烷和使用制备的表面改性的NFBC与制造的纳米复合材料偶联来研究NFBC纤维表面的化学改性。通过（3-氨基丙基）三甲氧基硅烷的单罐反应制备的产品，其中NFBC微纤维分散在水性酸中保留与完整NFBC相同的纳米纤维结构。摩尔取代的程度和硅的表面上依赖于NFBC /（3-氨基丙基）三甲氧基硅烷比上。热分析显示，产品的热降解温度随​​着摩尔替代程度的增加而增加。通过溶剂铸造制备高度透明（78-89％，在600nm处，甲基丙烯酸甲酯）基纳米复合材料;含有1.0wt％（3-氨基丙基）三甲氧基甲硅烷化的NFBC的纳米复合材料仅比600nm的整齐聚（甲基丙烯酸甲酯）更低的透明。另外，当加入1wt％的表面改性的NFBC时，纳米复合材料的拉伸强度大于整齐的聚（甲基丙烯酸甲酯）的两倍。预期表面改性的NFBC是一种增强纳米纤维材料，其赋予纤维增强树脂优异的物理性质。

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