柠檬酸
热稳定性
产量(工程)
水解
纤维素
盐酸
化学
微晶纤维素
化学工程
乳状液
Zeta电位
有机化学
乙酰丙酸
材料科学
纳米颗粒
催化作用
冶金
工程类
作者
Hou‐Yong Yu,Somia Yassin Hussain Abdalkarim,Heng Zhang,Chuang Wang,Kam Chiu Tam
出处
期刊:ACS Sustainable Chemistry & Engineering
[American Chemical Society]
日期:2019-02-08
卷期号:7 (5): 4912-4923
被引量:110
标识
DOI:10.1021/acssuschemeng.8b05526
摘要
Cellulose nanocrystals (CNCs) have great potentials in many applications, such as high-performance nanocomposites. However, there are many challenges in the industrial production of CNCs, such as high cost of acid recovery, acid disposal, low yield, and poor thermal stability. In this study, a simple process to extract CNCs via recyclable acid hydrolysis of microcrystalline cellulose (MCC) is presented. A high yield (up to 87.8%) of carboxylated CNCs was obtained using recyclable citric/hydrochloric acid mixtures compared to the 53.9% yield for sulfated CNCs via recyclable H2SO4 hydrolysis. The mild acid mixtures could be readily recovered and recycled three times and showed a slight effect on the size of CNCs, carboxyl content of citrate CNC surface, zeta potential value, and thermal stability. Both charged citrate CNCs and sulfate CNCs were excellent food Pickering emulsion stabilizers for soybean oil/water emulsion droplets, whose diameter decreased with increasing CNC contents. This work provides a simple and low-cost pathway to recover mineral or organic acids for the sustainable and green production of CNCs with high yield and thermal stability while addressing the environmental issue of acid disposal in large-scale production of CNCs.
科研通智能强力驱动
Strongly Powered by AbleSci AI