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芦苇秸秆纤维改性及与聚乳酸的共混 被引量:8
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作者 刘旭冉 王洪坤 +1 位作者 吴敏 黄勇 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2021年第1期43-50,共8页
秸秆天然纤维作为填料或增强材料可应用于复合材料领域,但由于其存在大量的亲水基团,与非极性聚合物材料界面相容性差影响着复合材料的性能,因此对植物纤维的化学改性成为改善界面结合的有效手段。文中采用固相力化学法制备马来酸酐酯... 秸秆天然纤维作为填料或增强材料可应用于复合材料领域,但由于其存在大量的亲水基团,与非极性聚合物材料界面相容性差影响着复合材料的性能,因此对植物纤维的化学改性成为改善界面结合的有效手段。文中采用固相力化学法制备马来酸酐酯化改性芦苇秸秆(MA-RS),扫描电镜(SEM)观察到马来酸酐结合外力的作用下秸秆发生解纤,纤维具有较高长径比;同时红外光谱及X射线光电子能谱测试表明,纤维表面马来酸酐基团的取代度随处理时间的延长而逐渐增大。改性秸秆与聚乳酸共混制备得到复合材料,由于马来酸酐的接枝改变秸秆纤维表面性质,提高了秸秆纤维与聚乳酸之间的相容性和界面结合力。力学测试结果表明,拉伸强度提高约16%,冲击强度提高约30%;SEM观察断面形貌表面,改性秸秆比未改性秸秆与PLA基体具有更好的界面相容性。 展开更多
关键词 秸秆纤维 聚乳酸 酯化改性 马来酸酐 力化学法
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Lignin-Containing Cellulose Nanomaterials:A Promising New Nanomaterial for Numerous Applications 被引量:7
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作者 Chinomso M.EWULONU xuran liu +1 位作者 Min WU Huang YONG 《Journal of Bioresources and Bioproducts》 EI 2019年第1期3-10,共8页
The demand for sustainable functional materials with an eco-friendly preparation process is on the rise.Lignocellulosics has been attributed as the most sustainable bioresource on earth which can meet the stringentreq... The demand for sustainable functional materials with an eco-friendly preparation process is on the rise.Lignocellulosics has been attributed as the most sustainable bioresource on earth which can meet the stringentrequirements of functionalization. However, cellulose nanomaterials obtained from lignocellulosics which has reachedadvanced stages as a sustainable functional material is challenged by its preparation procedures. These procedures can notbest be described as sustainable and eco-friendly owning to lots of energy and chemicals spent in the pre-treatment andpurification processes. These processes are intended to aid fractionation into the major components in order to removelignin and hemicellulose for the production of cellulose nanomaterials. This work is thus centred on reviewing theprogress achieved in introducing a new cellulose nanomaterial containing lignin. The preparation processes, propertiesand applications of this new lignin-containing cellulose nanomaterial will be discussed in order to chart a sustainablepreparation route for cellulose nanomaterials. 展开更多
关键词 lignocellulose nanofibers pre-treatment bioresources LIGNIN biomass NANOCELLULOSE
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