基于原子力显微镜的沥青微观结构研究  

Study on Micro-Structures of Asphalt by Using Atomic Force Microscopy

作　　者：杨军[1] 龚明辉 PAULI Troy 魏建明 王潇婷[4] 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]Western Research Institute,Laramie,WY,82072 [3]中国石油大学重质油国家重点实验室,山东青岛266580 [4]哈尔滨工业大学交通科学与工程学院,黑龙江哈尔滨150090

出　　处：《石油学报（石油加工）》2015年第4期959-965,共7页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：高等学校博士学科点专项科研基金(20120092110053)资助

摘　　要：采用原子力显微镜和均方根粗糙度参数研究了沥青种类、短期老化以及制样过程中冷却速率对沥青微观结构的影响。结果表明,不同沥青的蜂状结构尺寸、数量不尽相同,对短期老化的敏感性也不相同,而制样过程中冷却速率对蜂状结构的影响十分显著;同时,在沥青表面应力松弛过程中,不同区域的蜡链排列倾角存在差异是蜂状结构呈正弦波形式(波长约为500nm)的原因。根据相分离理论分析实验现象后得出,沥青质及胶质与蜡之间的相互作用是影响沥青相分离行为的重要因素。Atomic force microscopy and root mean square roughness were employed to investigate the influences of asphalt types, short-term aging, and cooling rate during sample preparation on the microstructures of asphalt. It was found that microstructures in different asphalts differed with each other in terms of size and number of bee-structure, and changed in different ways after short-term aging. Cooling rate during the sample preparation had a profound influence on these microstructures. Meanwhile, difference of title angles in different regions during stress relaxation process was thought to be the reason that bee-structure showed a sinusoidal wave form （the wavelength was about 500 nm）. Phase-separation theory was used to interpret the observation results, indicating that the interaction between wax and asphaltene or resin was a key factor affecting the phase-separation behavior of asphalt.

关 键 词：原子力显微镜 沥青 微观结构 蜂状结构 相分离 

分 类 号：TU571[建筑科学—建筑技术科学]