硅烷偶联剂处理竹粉化学结构变化及其反应路径  

Chemical Structure and Reaction Scheme of Modified Bamboo Powder with Silane Coupling Agent

作　　者：陈钦慧[1,2] 白卫斌[1,2] 徐艳莲[1,2] 林金火[1,2] 

机构地区：[1]福建师范大学化学与材料学院 [2]福建省高分子材料重点实验室,福建福州350007

出　　处：《林产化学与工业》2012年第6期27-31,共5页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(50973020;51103024)

摘　　要：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101.18 eV处出现了Si的发射峰,C1S分峰所对应的结合能由288.16 eV变为288.52 eV,氧原子在530.98 eV处CO双键的分峰消失,说明在没有外力或化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。The bamboo powder modified with the silane coupling agent of KH-560 （KB） Was studied by X-ray photoelectron spec- troscopy （XPS）, X-ray diffraction （XRD） and Fourier transform infrared （FT-IR） spectroscope. The modified mechanism was also investigated in this work. Results showed that the hydrolysis of KH-560 was found to enhance the 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＇t change after the modification by KH-560. ＂However, the reaction of bamboo powder and KH-560 was certified by the appearance of absorption of ether bond in FT-IR spectrum and the XPS peak of silicon at 101.18 eV. At the same time, the binding energy of C18 changed from 288.16 eV to 288.52 eV and the peak of oxygen atom （ attributed to C=O） at 530.98 eV disappeared. All results indicated that the reaction between bamboo powder and KH-560 didn＇t occur on the bamboo fibre due to the exist of the strong hydrogen bonding force, but on the aldehyde groups from lignin at the absence of mechanical force and chemistry reagent.

关 键 词：竹粉 硅烷偶联剂 表面改性 

分 类 号：TQ35[化学工程]