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纤维素纳米纤维的疏水改性及其在纸张中的应用
Hydrophobic Modification of Cellulose Nanofibrils and Their Application in Paper
收稿日期：2023-12-20  
DOI：10.11980/j.issn.0254-508X.2024.07.019
关键词:  纤维素纳米纤丝  植物多酚  表面改性  疏水
Key Words:cellulose nanofibrils  plant polyphenols  surface modification  hydrophobicity
基金项目:国家自然科学基金（22378367）；浙江省“领雁”研发攻关计划项目（2023C03157）；衢州市科技计划项目（2023Z002）。
作者单位邮编
周嘉铖 浙江理工大学纺织科学与工程学院制浆造纸研究所，浙江杭州，310018 310018
邹小峰 浙江华丰纸业集团有限公司，浙江安吉，313309 313309
杨祥建 浙江理工大学纺织科学与工程学院制浆造纸研究所，浙江杭州，310018
浙江华丰纸业集团有限公司，浙江安吉，313309 		313309
陈天影 浙江理工大学纺织科学与工程学院制浆造纸研究所，浙江杭州，310018 310018
唐艳军* 浙江理工大学纺织科学与工程学院制浆造纸研究所，浙江杭州，310018 310018
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摘要:本研究基于水相一锅两步法对纤维素纳米纤丝（CNFs）进行疏水改性，重点研究了没食子酸（GA）、没食子酸甲酯（MG）、没食子酸乙酯（EG）、没食子酸丙酯（PG）及原儿茶酸（PCA）5种植物多酚对CNFs疏水改性的影响，并对疏水改性CNFs在纸张涂布中的应用进行了探究。结果表明，植物多酚（GA、MG、EG、PG及PCA）均能协同十八胺（ODA）对CNFs进行疏水改性；且CNFs的疏水改性作用效果随植物多酚结构中碳链的延长而增强。疏水改性CNFs能够赋予纸张较好疏水性，PCA改性CNFs涂布纸的疏水性强于GA改性CNFs涂布纸的疏水性；PG改性CNFs涂布纸的水接触角较ODA涂布纸的水接触角提高了43%，且疏水改性CNFs涂布纸在干、湿状态下均能保持较好的抗张强度。
Abstract:In this study， the hydrophobic modification of cellulose manofibrils （CNFs） was achieved based on an effective one-pot two-step method. The effects of five different plant polyphenols including gallic acid （GA）， methyl gallate （MG）， ethyl gallate （EG）， propyl gallate （PG）， and protocatechuic acid （PCA） on the hydrophobic properties of CNFs were emphatically investigated. Subsequently， the application of modified CNFs in paper coating was discussed. The results showed that the chosen plant polyphenols （GA， MG， EG， PG and PCA） could work together with octadecamine （ODA） to achieve the hydrophobic modification of CNFs. Moreover， the hydrophobic modification effect of CNFs was enhanced with the growth of carbon chains in the plant polyphenol’s structure. The hydrophobic modified CNFs could impart paper with improved hydrophobicity. The hydrophobicity of CNFs coated paper modified through PCA was better than that of CNFs coated paper modified through GA. After coating through PG modified CNFs， the water contact angle of the CNFs coated paper was 43% higher than that of the ODA coated paper. Moreover， the hydrophobic modified CNFs coated paper could maintain desired tensile strength under dry and wet conditions.
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