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| 高压均质处理次数对桉木纤维素纳米纤丝性能的影响 |
| Effects of High-pressure Homogenization Times on Properties of Eucalyptus Cellulose Nanofibrils |
| 收稿日期：2022-02-18 |
| DOI：10.11980/j.issn.0254-508X.2022.10.002 |
| 关键词: 纤维素纳米纤丝 桉木 高压均质 研磨预处理 |
| Key Words:cellulose nanofibrils eucalyptus high-pressure homogenization ultrafine grinding pretreatment |
| 基金项目:山东省重点研发计划项目（2021CXGC010601，2019JZZY010326，2019JZZY010328）；国家高端外国专家引进计划（G2021024005L）；生物基材料与绿色造纸国家重点实验室开放课题项目（ZZ20190205）；泰山学者工程。 |
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| 摘要:采用超微粒研磨技术对漂白桉木浆进行研磨预处理，再利用高压均质技术制备纤维素纳米纤丝（CNF），探讨了高压均质处理对CNF结构及性能的影响。结果表明，增加高压均质次数有利于提高CNF的尺寸均一性及其悬浮液的稳定性；当高压均质处理20次时，CNF的Zeta电位达-29.4 mV，直径50~100 nm，长度1500~2000 nm，悬浮液稳定性较好；且制备的CNF膜保留了较强的亲水性，与水接触90 s后接触角仅30.8°。 |
| Abstract:Bleached eucalyptus pulp was pretreated with ultrafine grinding technology， and then high-pressure homogenized to produce cellulose nanofibrils （CNF）. Herein， the effect of high-pressure homogenization on the structure and properties of CNF was investigated. The results showed that the size uniformity of CNF and the stability of its suspension improved with times of high-pressure homogenization increased. When the pulp was high-pressure homogenizated for 20 times， the CNF with Zeta potential of -29.4 mV was obtained， of which the diameter and length were 50~100 nm and 1500~2000 nm， respectively. The CNF suspension demonstrated better stability and the prepared CNF film remained strong hydrophilicity with contact angle of only 30.8° after contacting with water for 90 s. |
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