Aerogels are obtained by laccase/2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO)-oxidation of galactomannans (GMs) from the leguminous plants fenugreek (Trigonella foenum-graecum), sesbania (Sesbania bispinosa) and guar (Cyamopsis tetragonolobus). GM oxidation in aqueous solutions causes a viscosity increase, resulting in structured and stable hydrogels. Upon lyophilization, water-insoluble aerogels are obtained, capable of water uptake up to several times their own weight.

The materials derived from the three gums have been analyzed and compared. Chemical modifications have been studied by electrospray-ionization mass spectrometry (ESI-MS) and Fourier-transform infrared spectroscopy (FTIR). Polymer structure has been determined by liquid-state and semi-quantitative solid-state nuclear magnetic resonance (NMR) spectroscopy and chemical stability by incubation under variable conditions of pH, ionic strength and solvent nature. The results show that hydrogel formation is due to oxidation of primary hydroxyl groups to carbonyl and carboxyl groups and subsequent formation of hemiacetal and ester bonds. Fenugreek displays the highest stability, compared to guar and sesbania rehydrated aerogels. This feature could be interpreted by its higher degree of substitution (Gal:Man = 1:1) and consequent higher amount of galactose primary alcohols, leading to more extensive crosslinking.

气凝胶是通过豆科植物胡芦巴（Trigonella foenum-graecum），芝麻（Sesbania bispinosa）和瓜尔豆的半乳甘露聚糖（GMs）的漆酶/ 2,2,6,6-四甲基哌啶-1-基）氧基（TEMPO）-氧化半乳甘露聚糖获得的。（Cyamopsis tetragonolobus）。水溶液中的GM氧化会导致粘度增加，从而导致结构化和稳定的水凝胶。冷冻干燥后，获得水不溶性气凝胶，其能够吸收高达其自身重量几倍的水。

对来自三种胶的材料进行了分析和比较。化学修饰已通过电喷雾电离质谱（ESI-MS）和傅立叶变换红外光谱（FTIR）进行了研究。聚合物的结构已通过液态和半定量固态核磁共振（NMR）光谱确定，并通过在各种pH，离子强度和溶剂性质的条件下孵育而确定了化学稳定性。结果表明水凝胶的形成是由于伯羟基被氧化成羰基和羧基以及随后形成了半缩醛和酯键。与瓜尔胶和芝麻水合气凝胶相比，葫芦巴显示出最高的稳定性。此功能可以通过其较高的取代度来解释（Gal：Man = 1：