Li Chong, Jiang Yueping, Huang Baoshan, Zhang Menghang, Feng Yanhong, Yang Zhitao
State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
National Engineering Research Center of Novel Equipment for Polymer Processing, South China University of Technology, Guangzhou 510640, China.
Materials (Basel). 2019 May 8;12(9):1499. doi: 10.3390/ma12091499.
A two-step method involving continuous screw-extrusion steam explosion (CSESE) pretreatment and esterification in supercritical carbon dioxide (scCO) is used to prepare long-chain fatty acid-modified jute fiber. The weight gain percentage (WG %) of CSESE-pretreated jute laurate (JL) was 110.7% when esterification was carried out in scCO at 14 MPa and 100 °C for 2 h. The corresponding WG % was 105.5% when esterification was instead carried out in pyridine at 100 °C for 2 h. Scanning electron microscopy and X-ray diffraction indicated that CSESE pretreatment enhanced the reactivity of jute fiber, with esterification in scCO simultaneously occurring on the fibers surface and internal walls. The glass transition temperature of esterified jute was approximately 119 °C, indicating that it could be hot processed over a wide temperature range. The esterified jute had an oil absorption ratio of 17.01 g/g, so it can be used as an oil absorption material.
采用两步法，即连续螺杆挤压蒸汽爆破（CSESE）预处理和在超临界二氧化碳（scCO₂）中进行酯化反应，来制备长链脂肪酸改性黄麻纤维。当在14 MPa和100℃的scCO₂中进行2小时酯化反应时，CSESE预处理的月桂酸黄麻（JL）的增重百分比（WG%）为110.7%。相反，当在吡啶中于100℃进行2小时酯化反应时，相应的WG%为105.5%。扫描电子显微镜和X射线衍射表明，CSESE预处理提高了黄麻纤维的反应活性，在scCO₂中的酯化反应同时发生在纤维表面和内壁。酯化黄麻的玻璃化转变温度约为119℃，表明它可以在较宽的温度范围内进行热加工。酯化黄麻的吸油率为17.01 g/g，因此可作为吸油材料使用。
