细粒子木质素的制备及其对NBR补强作用  

Preparation of fine lignin and its reinforcing effect on NBR

作　　者：钟汉权[1] 王迪珍[2] 杨军[2] 罗东山[2] 

机构地区：[1]暨南大学生物医学工程研究所,广东广州510632 [2]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《橡胶工业》2001年第1期20-24,共5页China Rubber Industry

基　　金：国家自然科学基金!资助项目 (5 92 73113)

摘　　要：采用自制射流装置制备的细粒子木质素作为橡胶补强剂 ,研究其对NBR的补强作用。结果表明 ,黑液酸化的pH值、脱水温度以及黑液与酸混合析出木质素时的湍流程度是影响颗粒细度的主要因素 ;木质素的粒径越小 ,对硫化胶的补强效果就越显著 ,当比表面积从 3.0m2 ·g-1提高到 43 5m2 ·g-1,粒径在 10 0～30 0nm之间时 ,36份木质素可使NBR硫化胶的拉伸强度、撕裂强度和扯断伸长率分别达到 2 0MPa ,42 0kN·m-1和 730 % ,显著优于半补强炭黑。A fine lignin was prepared and its reinforcing effect on NBR was investigated.The results showed that the pH value of the acidified black liquid,the dehydration temperature and the swift of the lignin eluted from the black liquid/sulfur acid mixture were the main effective factors on the particle size of lignin;the smaller the size of lignin particle,the better the reinforcing effect on NBR;the tensile strength,tear strength and elongation at break of NBR vulcanizate reached 20 MPa,42 kN·m -1 and 730% respectively by adding 36 phr of lignin with surface area of 43.5 m 2 ·g -1 and particle size of 100～300 nm and were significantly superior to those by adding semi reinforcing carbon black.

关 键 词：丁腈橡胶 NBR 木质素 补强 力学性能 橡胶补强剂 

分 类 号：TQ330[化学工程—橡胶工业]