CAJ | 학술논문

采用离子液体1-乙基-3-甲基咪唑醋酸盐( EmimAC )溶解杨木木粉,研究杨木粉在EmimAC中的溶解性能。通过单因素和正交试验优化得到溶解最佳条件为：溶解温度160℃,溶解时间16 h,木粉含水量7.5%,超声波预处理时间10 min,在此条件下,杨木粉溶解率为48.30%。在溶解过程中,未溶部分的总木质素含量呈现先增加后减小的趋势,在溶解时间为6h时总木质素由原料的26.29%增至最大29.43%。通过SEM、XRD、FT-IR对溶解前后木粉结构进行了表征,结果表明,溶解过程中EmimAC对杨木粉结构造成了一定破坏,在溶解时间为16 h时,结晶度由原来的45.43%降至29.03%,但此过程中并没有相应衍生物的产生,EmimAC是杨木粉的强而有效的直接性溶剂,为生物质的高效利用打下了基础。
채용리자액체1-을기-3-갑기미서작산염( EmimAC )용해양목목분,연구양목분재EmimAC중적용해성능。통과단인소화정교시험우화득도용해최가조건위：용해온도160℃,용해시간16 h,목분함수량7.5%,초성파예처리시간10 min,재차조건하,양목분용해솔위48.30%。재용해과정중,미용부분적총목질소함량정현선증가후감소적추세,재용해시간위6h시총목질소유원료적26.29%증지최대29.43%。통과SEM、XRD、FT-IR대용해전후목분결구진행료표정,결과표명,용해과정중EmimAC대양목분결구조성료일정파배,재용해시간위16 h시,결정도유원래적45.43%강지29.03%,단차과정중병몰유상응연생물적산생,EmimAC시양목분적강이유효적직접성용제,위생물질적고효이용타하료기출。
The solubility of poplar powder in EmimAC was studied. By single factor and orthogonal experiment, the optimum dissolution conditions were obtained as follows: dissolution temperature 160℃,dissolution time 16 h,moisture content of poplar powder 7. 5% , time by ultrasonic waves 10 min. Under the optimum dissolution conditions, the dissolution rate was 48. 30%. Furthermore, the total insoluble content of lignin increased at first and then decreased. It reached the maximum value of 29. 29%when the dissolution time was 6 h. The structures of poplar powder before and after dissolving were analyzed by SEM,XRD and FT-IR. It was found that structure damage of poplar powder occured when the dissolution time was 16 h, and the crystallinity reduced from 45. 43% to 29. 03%. However, there are no corresponding derivatives generated from dissolution process. This paper showed that EmimAC was a strong and effective direct solvent.