Preparation of ultrafine hydrophobic lignin-contained cellulose nanofiber via mechanochemical method and its films

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2024-11-17 DOI:10.1016/j.indcrop.2024.120064

Xi Chen , Jinfeng Liu , Dali Gao , Min Wu , Yong Huang

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Abstract

The high-value utilization of lignin-containing biomass waste generated during processing has gained widespread attention with the growing demand for renewable resources represented by bamboo. Herein, the 3,4-dichlorophenyl isocyanate (DCPI) was employed for mechanochemical derivatization/dispersion of bamboo powder after low concentration alkali pretreatment, in which an ultrafine hydrophobic carbamylated lignin-contained cellulose nanofiber (CLCN)¹ with a diameter of 2±1 nm was obtained. By adjusting the usage of DCPI and milling time, the nanometric defibrillation of lignin-contained cellulose can be promoted effectively, which further endow high stability of CLCN-suspension. Whereas, the CLCN-films possessed controllable optical properties, wettability and UV resistance, ensuring the haze above 80 % with a total optical transmissivity up to 86 % at 550 nm. Furthermore, it maintained a UV blocking efficiency exceeding 90 %, accompanied by a water contact angle of 86.4° and tensile strength of 83.26 MPa. This is conducive to expanding the application of lignin-containing biomass waste.

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通过机械化学方法制备超细疏水木质素纤维素纳米纤维及其薄膜

随着对以竹子为代表的可再生资源的需求日益增长，对加工过程中产生的含木质素生物质废料的高值化利用受到广泛关注。本文采用 3,4-二氯苯基异氰酸酯（DCPI）对低浓度碱预处理后的竹粉进行机械化学衍生/分散，得到了直径为 2±1 nm 的超细疏水氨甲酰化木质素纤维素纳米纤维（CLCN）1。通过调节 DCPI 的用量和研磨时间，可有效促进含木质素纤维素的纳米化，从而进一步赋予 CLCN 悬浮液高稳定性。而 CLCN 薄膜具有可控的光学特性、润湿性和抗紫外线性能，可确保雾度在 80% 以上，在 550 纳米波长下的总透光率高达 86%。此外，它的紫外线阻隔效率超过 90%，水接触角为 86.4°，拉伸强度为 83.26 兆帕。这有利于扩大含木质素生物质废料的应用范围。

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.