高速剪切辅助碱提取甘蔗渣纤维素及其理化分析
High-speed shear assisted alkaline extraction of cellulose from sugarcane bagasse and its physicochemical analysis
孙帅豪 1安凤平 2沈凡樱 1张建红 1宋洪波2
作者信息
- 1. 福建农林大学 食品科学学院,福州 350002
- 2. 福建农林大学 食品科学学院,福州 350002;福建省特种淀粉品质科学与加工技术重点实验室,福州 350002
- 折叠
摘要
针对传统碱法提取纤维素效率低的问题,以甘蔗渣为原料,采用响应面法优化高速剪切辅助碱提取纤维素工艺,将高速剪切辅助碱提取的甘蔗渣纤维素和传统碱提取法提取的化学纯纤维素的理化性质作比较.结果表明,在转速为5 600 r/min,提取时间为16 min,NaOH质量浓度为4.5%的条件下,获得S-CPC的α-纤维素含量为(93.05±0.21)%,稍大于CPC的(91.23±0.01)%,得率为(26.14±0.42)%;提取时间缩短56%.SEM分析表明,S-CPC和CPC的表面布满纤维束,前者更为松散;FT-IR光谱及X-射线分析表明,S-CPC与CPC均为纤维素I型结构;结晶度较高,分别为82.6%和83.0%.研究为高效制备高含量甘蔗纤维素提供参考.
Abstract
In order to solve the problem of low efficiency of traditional alkali extraction method of cellulose,the high-speed shear assisted alkaline extraction of cellulose was optimized by response surface methodology using sugarcane bagasse as raw material,and the physicochemical properties of bagasse cellulose(S-CPC)extracted by high shear assisted extraction method and chemically pure cellulose(CPC)extracted by traditional alkali extraction method were compared.The results show that under the conditions of rotational speed of 5600 rpm,extraction time of 16 min,and NaOH concentration of 4.5%,the content of α-cellulose of S-CPC obtained is(93.05±0.21)%,slightly higher than that of CPC(91.23±0.01)%and the yield is(26.14±0.42)%.The extraction time is shortened by 56%compared.The SEM analysis shows that the surfaces of S-CPC and CPC are covered with fiber bundles,and the former is more loosely packed.The FT-IR spectroscopy and X-ray analysis reveal that the cellulose structure of S-CPC and CPC is type I;the crystallinity is relatively high,which is 82.6%and 83.0%,respectively.This study can provide a reference for the efficient preparation of high-content sugarcane cellulose.
关键词
甘蔗渣/纤维素/高速剪切/理化分析Key words
bagasse/cellulose/high-speed shear/physicochemical analysis引用本文复制引用
基金项目
福建省科技重大专项(2020NZ010011)
出版年
2024
国家科技期刊平台
NSTL
万方数据