In this study, the eco-friendly heteropoly acids-phosphotungstic acid (PTA) was chosen as a catalyst to assist neutral deep eutectic solvents (DESs) for deconstructing corn straw. The reactions were performed with a shorter time at 110–150 °C than other DES system. The results revealed that most of the lignin (86.1 %) and hemicellulose (89.7 %) were removed while cellulose was obtained in high yields (88.9–94.3 %). Benefiting from the removal of hemicellulose and lignin, the enzymatic digestibility of pretreated materials was noticeably boosted to 94.4 %, which was 5.3-fold higher than the untreated corn straw. Meanwhile, the regenerated lignin nanoparticle was acquired with a relatively high purity (more than 85 wt%), low and homogeneous molecular weight (5669−2437 g/mol). Furthermore, the PTA/DES demonstrated excellent cycle performance. Overall, technically feasible PTA catalyzed DES pretreatment presented in-depth analysis for effective deconstruction of corn straw recalcitrance for crops valorization in the future.

在这项研究中，选择环保的杂多酸-磷钨酸（PTA）作为催化剂，辅助中性低共熔溶剂（DESs）解构玉米秸秆。与其他 DES 系统相比，反应在 110-150 °C 下进行的时间更短。结果表明，大部分木质素 (86.1%) 和半纤维素 (89.7%) 被去除，而纤维素以高产率 (88.9-94.3%) 获得。受益于半纤维素和木质素的去除，预处理材料的酶消化率显着提高至 94.4%，比未经处理的玉米秸秆高 5.3 倍。同时，再生木质素纳米颗粒具有较高的纯度（超过 85 wt%）、低且均一的分子量（5669-2437 g/mol）。此外，PTA/DES 表现出优异的循环性能。总体，