Abstract：
In this manuscript, three components of lignocellulosic biomass were obtained by deconstructing bamboo with γ-valerolactone-H2O biphasic system, and the delignification rate of 80.92 % was achieved at 120 °C for 90 min. Lignin nanospheres with diameters ranging from 75 nm to 2 um could be customized by varying the self-assembly rate. Furthermore, the lignin nanospheres-poly(vinyl alcohol) film was prepared by cross-linking lignin nanospheres and poly(vinyl alcohol), which can obtain 90 % ultraviolet absorption capacity, while the light transmittance in non-ultraviolet band was almost unchanged. At the same time, due to the strong hydrogen formation between lignin nanospheres and poly(vinyl alcohol) bond network, the tensile properties of the composite film were also improved by 30 %. Besides, the high specific surface area of biomass-derived porous biochar (2056 m2/g) can be obtained after carbonization of solid residues at 850 °C for 2 h, which was almost 8 times the specific surface area of the direct biomass carbonization due to the removal of lignin and hemicellulose. biomass-derived porous biochar can be used as an adsorbent, with a CO2 capture capacity of 4.5 mmol g-1 at normal temperature (25 °C, 1 bar). The filtrate after the reaction contained a large amount of hemicellulose oligomers, which can be reacted with dichloromethane at 170 °C for 1 h to obtain the furfural yield of 74 %. In summary, the proposed biorefinery scheme achieves a full-component upgrade of lignocellulose and can be further applied in various downstream fields.
摘要：
在这份手稿中,用γ-戊内酯-H2O双相体系解构竹子，获得了木质纤维素生物质的三种组分，在120°C持续90分钟，脱木素率达到80.92％。可以通过改变自组装速率来定制直径在75nm至2um范围内的木质素纳米球。此外，通过木质素纳米球和聚乙烯醇交联制备木质素纳米球-聚乙烯醇薄膜，可以获得90%的紫外线吸收能力，而在非紫外波段的透光率几乎没有变化。同时,由于木质素纳米球和聚（乙烯醇）键网络之间的强氢形成，复合薄膜的拉伸性能也提高了30%。此外,在850°C下碳化固体残留物2小时后，可以获得生物质衍生多孔生物炭的高比表面积（2056m2/g），由于木质素和半纤维素的去除，几乎是直接生物质碳化的比表面积的8倍。生物质衍生的多孔生物炭可以用作吸附剂，在常温下（25°C，1巴）。反应后的滤液中含有大量的半纤维素低聚物，可与二氯甲烷在170℃下反应1h,糠醛收率为74%。总之,拟议的生物炼制方案实现了木质纤维素的全组分升级，可以进一步应用于各种下游领域。
