Glucuronoxylans have been considered as an alternative polymer for petroleum polymers in coatings, films, emulsifiers, and other industries. In this study, different molecule weight glucuronoxylans were obtained through xylanase hydrolysis. Dodecenyl succinic anhydride (DDSA) was used as a modifying agent to functionalize glucuronoxylans. At the same degree of substitution (DS), higher molecule weight glucuronoxylans led to better emulsifying properties and emulsion stability. Higher molecule weight DDSA modified glucuronoxylans showed smaller droplets size, lower zeta potential, higher EA (emulsifying activity) and better emulsion stability. These results suggested that molecule weight has positive impact on the emulsifying properties of DDSA modified glucuronoxylans. Furthermore, DS had positive impact on the emulsifying properties of DDSA modified glucuronoxylans.

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分子量对十二烯基琥珀酸酐改性葡萄糖醛酸木聚糖乳化性能的影响

葡糖醛酸木聚糖已被认为是涂料、薄膜、乳化剂和其他行业中石油聚合物的替代聚合物。本研究通过木聚糖酶水解得到不同分子量的葡糖醛酸木聚糖。十二碳烯基琥珀酸酐 (DDSA) 被用作改性剂来官能化葡糖醛酸木聚糖。在相同的取代度（DS）下，较高分子量的葡糖醛酸木聚糖具有更好的乳化性能和乳液稳定性。较高分子量的 DDSA 改性葡糖醛酸木聚糖表现出更小的液滴尺寸、更低的 Zeta 电位、更高的 EA（乳化活性）和更好的乳液稳定性。这些结果表明分子量对 DDSA 改性葡糖醛酸木聚糖的乳化性能具有积极影响。此外，DS 对 DDSA 改性葡糖醛酸木聚糖的乳化性能具有积极影响。