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Phytic Acid Modified Boron Nitride Nanosheets as Sustainable Multifunctional Nanofillers for Enhanced Properties of Poly(l-lactide)
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-16 , DOI: 10.1021/acssuschemeng.9b06158 C.V. Sijla Rosely 1, 2 , Angel Mary Joseph 1, 2 , Andreas Leuteritz 3 , E. Bhoje Gowd 1, 2
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2020-01-16 , DOI: 10.1021/acssuschemeng.9b06158 C.V. Sijla Rosely 1, 2 , Angel Mary Joseph 1, 2 , Andreas Leuteritz 3 , E. Bhoje Gowd 1, 2
Affiliation
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A sustainable multifunctional nanofiller (f-BNNSs) based on boron nitride nanosheets and biobased phytic acid was prepared using (γ-aminopropyl) triethoxysilane as a coupling agent. The structure of f-BNNSs was analyzed systematically using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and elemental mapping. The influence of f-BNNSs on the crystallinity, polymorphism, crystallization kinetics, thermal stability, thermal conductivity, and flame retardant properties of poly(l-lactic acid) (PLLA) was systematically investigated. f-BNNSs show remarkable nucleating effects on the crystallization of PLLA, and the crystallization rate increases with increasing f-BNNSs loading. Upon addition of 20 wt % of f-BNNSs, the crystallization half-time of PLLA/f-BNNSs nanocomposite decreases from 12.0 to 1.0 min at 130 °C compared to PLLA. The presence of f-BNNSs in PLLA/f-BNNSs nanocomposites favors the formation of ordered α form irrespective of the loadings of f-BNNSs. Thermal stability and thermal conductivity of PLLA increased significantly due to the strong interfacial interactions between hydroxyl groups of f-BNNSs and the carboxyl groups of PLLA. The presence of phosphorus, nitrogen, silicon, and carbon elements in f-BNNSs improves the char forming capability of f-BNNSs leading to the enhancement of the flame retardancy of PLLA in PLLA/f-BNNSs nanocomposites. The limiting oxygen index (LOI) value of neat PLLA is 18.5% and it increases to 27.5% for PLLA nanocomposites containing 20 wt % of f-BNNSs. This work provides a new strategy toward the development of environmentally friendly multifunctional nanofiller for PLLA.
中文翻译：
植酸修饰的氮化硼纳米片作为可持续的多功能纳米填料，可增强聚（l-丙交酯）的性能
以（γ-氨基丙基）三乙氧基硅烷为偶联剂，制备了基于氮化硼纳米片和生物基植酸的可持续多功能纳米填料（f -BNNSs）。使用傅里叶变换红外光谱，X射线光电子能谱和元素映射系统分析了f -BNNS的结构。系统地研究了f -BNNSs对聚（l-乳酸）（PLLA）的结晶度，多态性，结晶动力学，热稳定性，导热性和阻燃性能的影响。f -BNNSs对PLLA的结晶具有明显的成核作用，且结晶速率随f的增加而增加-BNNSs加载。与PLLA相比，添加20 wt％的f -BNNSs时，PLLA / f -BNNSs纳米复合材料的结晶半衰期在130°C下从12.0减少到1.0 min。在PLLA / f -BNNSs纳米复合物中，f -BNNSs的存在有利于有序α形式的形成，而与f -BNNSs的负载无关。由于f -BNNSs的羟基与PLLA的羧基之间强烈的界面相互作用，使得PLLA的热稳定性和导热系数显着提高。磷，氮，硅和碳元素的存在˚F -BNNSs改善了可形成焦炭的能力˚F-BNNSs导致PLLA / f -BNNSs纳米复合材料中PLLA的阻燃性增强。纯PLLA的极限氧指数（LOI）值为18.5％，对于包含20 wt％f -BNNSs的PLLA纳米复合材料，极限氧指数（LOI）值增加到27.5％。这项工作为开发用于PLLA的环保多功能纳米填料提供了新的策略。
更新日期：2020-01-17
中文翻译：
植酸修饰的氮化硼纳米片作为可持续的多功能纳米填料，可增强聚（l-丙交酯）的性能
以（γ-氨基丙基）三乙氧基硅烷为偶联剂，制备了基于氮化硼纳米片和生物基植酸的可持续多功能纳米填料（f -BNNSs）。使用傅里叶变换红外光谱，X射线光电子能谱和元素映射系统分析了f -BNNS的结构。系统地研究了f -BNNSs对聚（l-乳酸）（PLLA）的结晶度，多态性，结晶动力学，热稳定性，导热性和阻燃性能的影响。f -BNNSs对PLLA的结晶具有明显的成核作用，且结晶速率随f的增加而增加-BNNSs加载。与PLLA相比，添加20 wt％的f -BNNSs时，PLLA / f -BNNSs纳米复合材料的结晶半衰期在130°C下从12.0减少到1.0 min。在PLLA / f -BNNSs纳米复合物中，f -BNNSs的存在有利于有序α形式的形成，而与f -BNNSs的负载无关。由于f -BNNSs的羟基与PLLA的羧基之间强烈的界面相互作用，使得PLLA的热稳定性和导热系数显着提高。磷，氮，硅和碳元素的存在˚F -BNNSs改善了可形成焦炭的能力˚F-BNNSs导致PLLA / f -BNNSs纳米复合材料中PLLA的阻燃性增强。纯PLLA的极限氧指数（LOI）值为18.5％，对于包含20 wt％f -BNNSs的PLLA纳米复合材料，极限氧指数（LOI）值增加到27.5％。这项工作为开发用于PLLA的环保多功能纳米填料提供了新的策略。
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