Freitas Pedro A V, Collado Paula Alonso, González-Martínez Chelo, Chiralt Amparo
Institute of Food Engineering FoodUPV, Universitat Politècnica de València, 46022 Valencia, Spain.
Polymers (Basel). 2025 Apr 18;17(8):1103. doi: 10.3390/polym17081103.
Cellulose and starch-cellulose composite aerogels were obtained using green cellulose from rice straw (RS) purified with a more environmentally friendly process. Pure starch aerogels were also obtained for comparison purposes. The effect of the aerogel cross-linking with polyamideamine-epichlorohydrin (PAE) was also analysed. The properties of the cellulose aerogels were in the range of those reported using other RS cellulose fibres with similar compositions. Blending with starch implied a decrease in the liquid water absorption capacity but an increase in the mechanical strength, flexibility, and oil absorption capacity, compared to pure cellulose aerogels. Cross-linking with PAE promoted the water adsorption capacity of all aerogels and the oil absorption capacity and mechanical strength of cellulose aerogels. However, PAE did not benefit the strength and oil absorption capacity of aerogels containing starch due to their specific interactions that negatively affect the aerogel structure. Therefore, it was possible to obtain cellulose and cellulose-starch composite aerogels from RS green cellulose with modulated properties for different applications.
使用经更环保工艺纯化的稻草（RS）中的绿色纤维素制备了纤维素和气凝胶淀粉-纤维素复合材料。还制备了纯淀粉气凝胶用于比较。分析了气凝胶与聚酰胺胺-表氯醇（PAE）交联的效果。纤维素气凝胶的性能与使用其他具有相似组成的RS纤维素纤维所报道的性能范围一致。与纯纤维素气凝胶相比，与淀粉混合意味着液态水吸收能力下降，但机械强度、柔韧性和吸油能力增加。与PAE交联提高了所有气凝胶的吸水能力以及纤维素气凝胶的吸油能力和机械强度。然而，由于PAE与含淀粉气凝胶的特定相互作用会对气凝胶结构产生负面影响，因此不利于含淀粉气凝胶的强度和吸油能力。因此，有可能从RS绿色纤维素中获得具有不同性能的纤维素和纤维素-淀粉复合气凝胶，以用于不同的应用。
