硅烷偶联剂处理竹粉化学结构变化及其反应路径-林产化学与工业.PDF

硅烷偶联剂处理竹粉化学结构变化及其反应路径 陈钦慧,白卫斌,徐艳莲,林金火* (福建师范大学化学与材料学院;福建省高分子材料重点实验室, 福建 福州 350007) 摘摇 要:摇 利用X射线光电子能谱(XPS)、X射线粉末衍射(XRD)和红外光谱(IR)研究硅烷偶联剂 (KH-560)改性前后竹粉结构的变化,并推测硅烷偶联剂对竹粉表面改性的机理。 实验结果表明, KH-560 水解后,通过形成氢键和脱水缩合两个阶段结合到竹粉的表面。 硅烷偶联剂改性后的竹粉 CHEN Qin鄄hui摇 摇 结晶结构没有明显的变化,IR谱图出现了醚键的吸收,XPS在101.18eV 处出现了Si 的发射峰,C1S 分峰所对应的结合能由288.16eV 变为288.52eV,氧原子在530.98eV处C O双键的分峰消失,说明在没有外力或化 詤 学试剂作用的情况下,竹纤维素分子间较强的相互作用力使反应无法发生在竹纤维素上,而主要是在木质素的醛基 C O上进行。 詤 关键词:摇 竹粉;硅烷偶联剂;表面改性 中图分类号:TQ35摇 摇 摇 摇 摇 摇 文献标识码:A摇 摇 摇 摇 摇 摇 文章编号:0253-2417(2012)06-0027-05 Chemical Structure and Reaction Scheme of Modified Bamboo Powder with Silane Coupling Agent CHEN Qin鄄hui,BAI Wei鄄bin,XU Yan鄄lian,LINJin鄄huo (College of Chemistry and Material Science,Fujian Normal University;Fujian Key Laboratory of Polymer Materials,Fuzhou350007,China) Abstract:Thebamboopowdermodifiedwiththesilanecouplingagentof KH鄄560 (KB)wasstudiedbyX鄄rayphotoelectronspec鄄 troscopy (XPS),X鄄ray diffraction (XRD) and Fourier transform infrared (FT鄄IR) spectroscope. The modified mechanism was also investigated in thiswork. Results showedthat the hydrolysis of KH鄄560 wasfoundto enhancethe attachment on the surface of bamboo powder by the formation of hydrogen bond and dehydration condensation. XRD analysis indicated that the degree of crystallinity of bamboo powder didn忆t change after the modification by KH鄄560. However,the reaction of bamboo powder and KH鄄560wascertifiedbytheappearanceof absorptionofetherbondinFT鄄IRspectrumandtheXPSpeakof siliconat 101.18eV. At the same time,the binding energy of C changedfrom288.16eV to 288.52eV and the peak of oxygen atom (attributed to 1s C O) at530.98eV disappeared