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Structure and properties of quaternary fulvic acid–intercalated saponite/poly(lactic acid) nanocomposites
Abstract Fulvic acid (FA) was prepared from humate sodium and nitric acid, and then quaternary fulvic acid (QFA) was synthesized from FA. QFA–intercalated saponite (QFA–saponite) was prepared using the ultrasonic radiation method. To improve the thermal and mechanical properties of poly(lactic acid) (PLA), QFA–saponite/PLA nanocomposites were prepared from QFA–saponite and PLA using the solution intercalation method. The microstructure of QFA–saponite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), indicating successful modification of QFA. The XRD analysis also showed that the QFA–saponite/PLA nanocomposites consisted of intercalated and partially exfoliated structure. The thermal properties of the QFA–saponite/PLA nanocomposites were investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetric (DSC) analysis. Moreover, the antibacterial properties of the QFA–saponite/PLA nanocomposites were studied. Because of the nanometer-sized dispersion of QFA–saponite in the PLA matrix, the QFA–saponite/PLA nanocomposites exhibited improved thermal and mechanical properties compared with pure PLA. When the content of QFA–saponite was 1wt.%, the QFA–saponite/PLA nanocomposites exhibited optimum thermal and mechanical properties. The antibacterial properties of QFA–saponite were endowed to the PLA-based nanocomposites.
Graphical abstract Display Omitted
Highlights A novel QFA–saponite was synthesized from saponite and weathered coal. QFA–saponite was an efficient nanofiller in improving the properties of PLA. QFA–saponite significantly induced the crystallization of PLA. QFA–saponite/PLA nanocomposites showed a strong bacteriostatic activity.
Structure and properties of quaternary fulvic acid–intercalated saponite/poly(lactic acid) nanocomposites
Abstract Fulvic acid (FA) was prepared from humate sodium and nitric acid, and then quaternary fulvic acid (QFA) was synthesized from FA. QFA–intercalated saponite (QFA–saponite) was prepared using the ultrasonic radiation method. To improve the thermal and mechanical properties of poly(lactic acid) (PLA), QFA–saponite/PLA nanocomposites were prepared from QFA–saponite and PLA using the solution intercalation method. The microstructure of QFA–saponite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), indicating successful modification of QFA. The XRD analysis also showed that the QFA–saponite/PLA nanocomposites consisted of intercalated and partially exfoliated structure. The thermal properties of the QFA–saponite/PLA nanocomposites were investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetric (DSC) analysis. Moreover, the antibacterial properties of the QFA–saponite/PLA nanocomposites were studied. Because of the nanometer-sized dispersion of QFA–saponite in the PLA matrix, the QFA–saponite/PLA nanocomposites exhibited improved thermal and mechanical properties compared with pure PLA. When the content of QFA–saponite was 1wt.%, the QFA–saponite/PLA nanocomposites exhibited optimum thermal and mechanical properties. The antibacterial properties of QFA–saponite were endowed to the PLA-based nanocomposites.
Graphical abstract Display Omitted
Highlights A novel QFA–saponite was synthesized from saponite and weathered coal. QFA–saponite was an efficient nanofiller in improving the properties of PLA. QFA–saponite significantly induced the crystallization of PLA. QFA–saponite/PLA nanocomposites showed a strong bacteriostatic activity.
Structure and properties of quaternary fulvic acid–intercalated saponite/poly(lactic acid) nanocomposites
Wang, Wentao (author) / Zhen, Weijun (author) / Bian, Shengzhen (author) / Xi, Xi (author)
Applied Clay Science ; 109-110 ; 136-142
2015-02-27
7 pages
Article (Journal)
Electronic Resource
English
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