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首页> 外文期刊>Journal of Polymers and the Environment >Sorption Behaviour of Enzymatically and Chemically Formed Beechwood (Fagus sylvatica) Xylan Hydrogels onto Cellulosic Materials Under Different Sorption Conditions
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Sorption Behaviour of Enzymatically and Chemically Formed Beechwood (Fagus sylvatica) Xylan Hydrogels onto Cellulosic Materials Under Different Sorption Conditions

机译：在不同的吸附条件下，酶促化学形成的山毛榉木（Fagus sylvatica）木聚糖水凝胶对纤维素材料的吸附行为

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Interaction between xylan and cellulose is important in surface modification and production of novel composites because different surface properties and functionalities can be introduced. Such interactions are enhanced when xylan is less soluble (hydrogel form). The study investigated how production and sorption conditions influence sorption behaviour of xylan hydrogels onto pure and less pure cellulosic materials. Xylan hydrogels were produced from beechwood (Fagus sylvatica) xylan by selective removal of 4-O-methyl-glucuronic acid substituents using recombinant -d-glucuronidase and by coacervation using NaOH and CH3COOH, for sorption either ex-situ or in-situ onto bleached pulp and filter paper (both containing less pure cellulose) and cotton wool (pure cellulose). The interaction between the xylan hydrogel production method and the type of cellulosic material significantly (p0.5) influenced xylan sorption behaviour onto cellulosic materials. In-situ sorption of enzymatic xylan hydrogels increased the weight of cellulosic materials the highest when compared to sorption of xylan hydrogel ex-situ. However, among the cellulosic materials, the highest weight gain upon xylan hydrogels sorption was of bleached pulp. Therefore, the in-situ enzymatic method offered a biobased method that can facilitate xylan sorption onto different cellulosic materials. On the other hand, coacervation method produced spherical xylan hydrogels that maintained spherical morphology upon assembling onto cotton wool in ex-situ sorption; a behaviour not evident on bleached pulp and filter paper. Furthermore, temperature significantly influenced the sorption process compared to xylan hydrogel concentration. Therefore, varying xylan hydrogel production and sorption conditions can customize the sorption capacity and assembling of xylan hydrogels onto different cellulosic materials.
机译：木聚糖和纤维素之间的相互作用在表面改性和新型复合材料的生产中很重要，因为可以引入不同的表面性质和功能。当木聚糖的溶解度较低（水凝胶形式）时，这种相互作用会增强。该研究调查了生产和吸附条件如何影响木聚糖水凝胶在纯净和较不纯净的纤维素材料上的吸附行为。通过使用重组-d-葡糖醛酸糖苷酶选择性除去4-O-甲基-葡糖醛酸取代基并使用NaOH和CH3COOH凝聚，以在原位或原位吸附到漂白剂上，由山毛榉木（Fagus sylvatica）木聚糖产生木聚糖水凝胶。纸浆和滤纸（均含有较少的纯纤维素）和棉绒（纯纤维素）。木聚糖水凝胶生产方法与纤维素材料类型之间的相互作用显着（p <0.5）影响了木聚糖在纤维素材料上的吸附行为。与异位木聚糖水凝胶的吸附相比，酶促木聚糖水凝胶的原位吸附增加了纤维素材料的重量。但是，在纤维素材料中，木聚糖水凝胶吸附后增重最大的是漂白纸浆。因此，原位酶法提供了一种生物基方法，可以促进木聚糖吸附到不同的纤维素材料上。另一方面，凝聚法制得的球形木聚糖水凝胶在异位吸附组装到棉绒上时保持球形形态。在漂白纸浆和滤纸上没有明显的表现。此外，与木聚糖水凝胶浓度相比，温度显着影响吸附过程。因此，改变木聚糖水凝胶的产生和吸附条件可以定制木聚糖水凝胶的吸附能力和组装到不同纤维素材料上的能力。

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