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细菌纤维素原位复合二醋酸纤维的制备及其表征(3)
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摘要:图4 复合材料拉伸应力-应变曲线Fig.4 Stress-strain curve of BC/CDA composites 4 结 论 1.利用细菌纤维素可以成功粘结二醋酸短纤维网制得复合无纺布,二者具有良
图4 复合材料拉伸应力-应变曲线Fig.4 Stress-strain curve of BC/CDA composites
4 结 论
1.利用细菌纤维素可以成功粘结二醋酸短纤维网制得复合无纺布,二者具有良好的相容性。通过形貌分析可知,细菌纤维素呈网状结构包覆在纤维表面和进入短纤维之间的空隙,从而与二醋酸纤维网之间形成良好的一体式结构;并且细菌纤维素纤维可以贯穿到纤维层,有利于提高复合材料的强力。
2.红外光谱分析结果显示,与二醋酸纤维相比,粘结细菌纤维素后的无纺布产生大量氢键,这些氢键的形成一方面说明了细菌纤维素的存在,表明二者成功复合;另一方面也说明二醋酸纤维与细菌纤维素之间产生稳定的结合。
3.孔径分析表明复合材料孔径分布在20.0~106.5 μm,透气率为107 mm/s。
4.力学性能测试结果显示,复合材料拉伸断裂强度可达5.95 MPa,断裂伸长率为7.10%,杨氏模量为89.87 MPa。结合拉伸应力-应变曲线分析,可以得出复合材料力学性能良好,进一步证实了细菌纤维素粘结二醋酸纤维的可行性。
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