纳晶纤维素的制备及其应用展望

Preparation of nanocrystalline cellulose and its application prospect

以造纸用竹浆纤维为原料,通过硫酸水解法制备纳晶纤维素(NCC),以制得的NCC得率及粒径为指标,探讨了打浆度、硫酸浓度、反应温度和水解时间对NCC得率的影响,并采用正交实验优化了工艺条件。实验结果表明:当硫酸浓度为62%,反应温度45℃,水解时间7h时,NCC的得率最高,达到45%左右。用扫描电镜(SEM)和粒度分析仪对NCC的形貌、尺寸进行了表征及分析。对纳晶纤维素的应用前景进行了分析。

Nanocrystalline cellulose （NCC） was prepared from bamboo pulp fiber by the method of sulfuric acid hydrolysis. Taken the yield and particle size of NCC as targets, the effects of beating degree, sulfuric acid concentration, reaction temperature and hydrolysis time on NCC yield were discussed with the process conditions optimized by an orthogonal experiment. The results show that when the beating degree is 50°SR, the sulfuric acid concentration 62%, reaction temperature 45℃ and the hydrolysis time 7h, the yield of NCC can be reached the highest as around 45%. The morphology and size of NCC were characterized by scanning electron microscope （SEM） and particle size analyzer. The prospect of the application of NCC was analyzed.