Abstract

Hemicelluloses account for 15–30 % of the lignocellulosic biomass and are considered as abundant renewable biopolymers. They are the major byproducts from pulping and other biorefinery industries, but are highly underutilized and usually burned as low value fuel. In this study, glucuronoxylan recovered from dissolving pulp mill were used to produce a high-quality bio-based emulsifier. Octylamine, dodecylamine and hexadecylamine were used to modify oxidized glucuronoxylan in order to improve the amphipathic properties of glucuronoxylan. Alkyl aminated glucuronoxylan emulsions showed smaller droplet size, higher emulsion activity and lower zeta potential compared to that of unmodified glucuronoxylan emulsions. With the increasing of alkyl contents, the emulsifying properties were improved. However, when the contents of alkyl groups increased beyond a certain value, the emulsifying properties were not changed significantly. Furthermore, the alkyl chain length also had a positive impact on emulsifying properties of alkylamine aminated glucuronoxylans. These results suggest that alkyl aminated glucuronoxylans have the potential to substitute for petroleum-based emulsifiers in many applications.

Graphic abstract

中文翻译：

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氨基官能化的葡萄糖醛酸木聚糖是一种高效的生物基乳化剂

摘要

半纤维素占木质纤维素生物量的15％至30％，被认为是丰富的可再生生物聚合物。它们是制浆和其他生物精炼行业的主要副产品，但利用率极低，通常作为低价燃料燃烧。在这项研究中，从溶解纸浆厂回收的葡糖醛酸木聚糖用于生产高质量的生物基乳化剂。为了提高葡糖醛酸木聚糖的两亲性，使用辛胺，十二烷基胺和十六烷基胺对氧化的葡糖醛酸木聚糖进行改性。与未改性的葡萄糖醛酸木聚糖乳液相比，烷基胺化的葡萄糖醛酸木聚糖乳液显示出较小的液滴尺寸，较高的乳液活性和较低的ζ电势。随着烷基含量的增加，乳化性能得到改善。然而，当烷基的含量增加到超过一定值时，乳化性能没有明显改变。此外，烷基链长也对烷基胺胺化的葡糖醛酸木聚糖的乳化性能具有积极的影响。这些结果表明，烷基胺化的葡糖醛酸木聚糖具有在许多应用中替代石油基乳化剂的潜力。

图形摘要