Hydrogen Bonding Interaction of Poly(D,L-Lactide)/hydroxyapatite Nanocomposites

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• 作者：Shaobing Zhou ; Xiaotong Zheng ; Xiongjun Yu ; Jianxin Wang ; Jie Weng ; Xiaohong Li ; Bo Feng ; Ming Yin
• 刊名：Chemistry of Materials
• 出版年：2007
• 出版时间：January 23, 2007
• 年：2007
• 卷：19
• 期：2
• 页码：247 - 253
• 全文大小：571K
• 年卷期：v.19,no.2(January 23, 2007)
• ISSN：1520-5002

文摘

It was necessary to study the bonding mechanism of poly(D,L-lactide) (PDLLA) and hydroxyapatite(HA) nanoparticles because of their increasing application in medical fields. In this paper, hydrogenbonding between PDLLA and HA in PDLLA/HA nanocomposites was first investigated by scanningelectron microscopy (SEM), differential scanning calorimetry (DSC), Fourier transform infraredspectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). Structural morphology and glasstransition temperature (T_g) of the nanocomposites showed that there was a close interaction betweenpolymer matrix and inorganic nanoparticls. The results from FTIR and XPS indicated that the hydrogenbonding between the C=O in PDLLA and the surface P-OH groups of HA nanocrystalline was formedindeed. Shape memory properties were improved, which further implied the existence of hydrogen bondingin these nanocomposites. Thus, we designed a schematic model of the hydrogen bonding on the base ofthe experimental results. It can clearly explain the interaction mechanism of polymeric phases and inorganicphase in nanocomposites.