摘要
以K2S2O8-Na2S2O3复合体系引发碱木质素和丙烯酸钠接枝共聚,研究了碱木质素接枝丙烯酸钠共聚物的分离方法。结果表明,采用酸析离心工艺能有效地分离接枝共聚物,而且在中和度105%～115%、转速6000r/min下,离心9min即可达到均聚物与共聚物的良好分离,红外光谱证实分离产物为接枝共聚物。
Grafted copolymerization of alkali-lignin with sodium acrylate was carried out using K2S2O8 and Na2S2O3 as initiator, and method of separating alkali-lignin grafted copolymers was investigated. The results showed that acidification followed by centrifugation could well separate out the grafted copolymers from the crude products. At neutralization degree of 105 %-115 % and centrifugation rate of 6 000 r/min, the separation could be done in 9 min. Using the FT-IR spectra, the separated product was verified to be grafted eopolymers.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2009年第3期107-110,共4页
Chemistry and Industry of Forest Products
关键词
碱木质素
接枝共聚
分离方法
丙烯酸钠
alkali-lignin
graft copolymerization
separation method
sodium acrylate
