不同预处理酶解木质素对丁腈橡胶的补强性能研究  

Effects of Different Pretreated Enzymatic Hydrolysis Lignins on Reinforcement of Acrylonitrile Butadiene Rubber

作　　者：周明松[1] 莫贤科 楼宏铭[1] 杨东杰[1] 邱学青[1] 

机构地区：[1]华南理工大学化学与化工学院,广东省绿色化学产品技术重点实验室,广东广州510640

出　　处：《高校化学工程学报》2014年第4期830-836,共7页Journal of Chemical Engineering of Chinese Universities

基　　金：国家杰出青年科学基金(20925622);国家自然科学基金(21006036);973计划(2010CB732205);国家国际科技合作专项(2013DFA41670)

摘　　要：采用球磨、喷雾干燥、气流粉碎三种方法分别对酶解木质素(EHL)进行预处理,考察其对丁腈橡胶(NBR)的补强性能影响。结果表明,EHL经气流粉碎预处理后的堆积密度最小(0.3329 g·cm-3),其在NBR基质中的分散粒径最细(约为2.5μm)且最均匀,对NBR的补强效果也最好。硫化胶的综合力学性能方面,气流粉碎预处理方法明显优于球磨法和喷雾干燥法。当EHL的用量为40质量份(phr)时,气流粉碎的NBR/EHL硫化胶的拉伸强度比球磨法、喷雾干燥法分别高出24.44%、61.29%;比空白NBR的拉伸强度提高257%。热重及热氧老化力学性能分析表明,酶解木质素在NBR/EHL共混体系中起到一定的热稳定及抗老化作用。扫描电镜图像显示,气流粉碎的酶解木质素与NBR的相容性比球磨、喷雾干燥法的有较大提高,木质素颗粒与橡胶相间的相互作用力较强。The influence of three pretreatment methods （Ball Milling （BM）, Spray Drying （SD） and Jet Milling （JM）） of Enzymatic Hydrolysis Lignin （EHL） on their acrylonitrile butadiene rubber （NBR） reinforcement abilities was investigated. The results show that the Jet Milled Lignin （EHL-JM） has the smallest bulk density （0.3329 g.cm^-3）, the finest particle size （about 2.5 μm） and the best dispersion in NBR matrices, which results in the best strengthening effect. When 40 phr （parts per hundred rubber） lignin was added, the tensile strength of NBR reinforced by EHL-JM is 24.44% and 61.29% higher than that of EHL-BM and EHL-SD, respectively, and the tensile strength is 257% times higher than that of pure NBR. Thermogravimetry results and the analysis of thermal-oxidative aging mechanical properties reveal that EHL can enhance thermal-stabilizing and anti-aging properties of the NBR/EHL blends. Scanning electron microscope images show that, comparing with EHL-BM and EHL-SD, EHL-JM has better compatibility with NBR and the interphase adhesion between lignin particles and rubber is stronger.

关 键 词：酶解木质素 丁腈橡胶 补强性能 气流粉碎 球磨 喷雾干燥 

分 类 号：TQ333.7[化学工程—橡胶工业] TQ330.38