Emulsions of cellulose oxalate from Norway spruce (Picea abies) bark and dissolving pulp

IF 2.2 3区农林科学 Q2 FORESTRY

Holzforschung Pub Date : 2023-05-31 DOI:10.1515/hf-2022-0191

Isabella Kwan, B. Rietzler, M. Ek

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引用次数: 1

Abstract

Abstract Tree bark is normally a side-stream product but by an integrated bark biorefinery approach, valuable compounds may be recovered and used to replace fossil-based products. Norway spruce bark was extracted to obtain cellulose, which was chemically treated to produce cellulose oxalate (COX) which was homogenized to yield nanocellulose. The nanocellulose was used to produce Pickering emulsions with almond oil and hexadecane as organic phases. COX from dissolving pulp was used to study the effect of various raw materials on the emulsifying properties. The COX samples of bark and dissolving pulp contained a significant amount of hemicelluloses, which affected the viscosity results. The emulsion properties were affected by the organic phases and the aspect ratio. Emulsions using hexadecane were more stable than the emulsions using almond oil. Since the aspect ratio of bark was lower than that of the dissolving pulp, the emulsifying properties of the COX dissolving pulp was better. It has been shown that nanocellulose from cellulose oxalate of both spruce bark and dissolving pulp is a promising substitute for petroleum-based emulsifiers and surfactants. By utilizing bark, value-added products can be produced which may be economically beneficial for various industries in the future and their aim for climate-neutral products.

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挪威云杉（Picea abies）树皮草酸纤维素乳液和溶解浆

摘要树皮通常是一种支流产品，但通过综合树皮生物精炼方法，可以回收有价值的化合物并用于取代化石产品。提取挪威云杉树皮以获得纤维素，对其进行化学处理以产生草酸纤维素（COX），将其均质化以产生纳米纤维素。用纳米纤维素制备了以杏仁油和十六烷为有机相的Pickering乳液。利用溶解浆中的COX研究了不同原料对其乳化性能的影响。树皮和溶解浆的COX样品含有大量的半纤维素，这影响了粘度结果。乳液的性能受有机相和长径比的影响。使用十六烷的乳液比使用杏仁油的乳液更稳定。由于树皮的长径比低于溶解浆，COX溶解浆的乳化性能较好。研究表明，从云杉皮和溶解浆的草酸纤维素中提取的纳米纤维素是一种很有前途的石油乳化剂和表面活性剂的替代品。通过利用树皮，可以生产增值产品，这可能对未来的各个行业及其气候中性产品的目标具有经济效益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Holzforschung 工程技术-材料科学：纸与木材

CiteScore

4.60

自引率

4.20%

发文量

审稿时长

3.3 months

期刊介绍： Holzforschung is an international scholarly journal that publishes cutting-edge research on the biology, chemistry, physics and technology of wood and wood components. High quality papers about biotechnology and tree genetics are also welcome. Rated year after year as one of the top scientific journals in the category of Pulp and Paper (ISI Journal Citation Index), Holzforschung represents innovative, high quality basic and applied research. The German title reflects the journal''s origins in a long scientific tradition, but all articles are published in English to stimulate and promote cooperation between experts all over the world. Ahead-of-print publishing ensures fastest possible knowledge transfer.