A conventional hand lay-up and compression molding based surface selective dissolution technique was utilized to prepare all-cellulose composite (ACC) laminates with varying dissolution times, while lyocell fabric and ionic liquid (1-butyl-3-methyl imidazolium chloride) were used as raw materials. The density of composites increased with increasing dissolution time due to reduction in porosity and formation of more compact composite structure. The tensile strength of the composites increased up to 2 h dissolution time and reduced slightly for higher dissolution time. However, Young's modulus of the composites increased significantly, with increasing dissolution time. Water-absorbency at the surface of ACCs also reduced significantly with increasing dissolution time during preparation of ACCs, imparting slight hydrophobicity in the ACC-laminates prepared by using 2 h or more dissolution time. The contact angle of the composites produced with 4 h dissolution time was about 76.3° and complete absorption of the water droplet took almost 24 min. Such high contact angle was obtained due to a change in chemical as well as crystallographic structure of cellulose as analyzed by ATR-FTIR and solid-state ¹³C NMR, which was further supported by WAXD, TGA and DTG analysis. A different trend was observed for water and oil absorbency of ACCs based on their absorption mechanism.

利用常规的手工铺网和压塑成型的表面选择性溶解技术来制备具有不同溶解时间的全纤维素复合材料（ACC）层压板，同时使用莱赛尔织物和离子液体（1-丁基-3-甲基咪唑鎓氯化物）作为原料。复合材料的密度随着溶解时间的增加而增加，这归因于孔隙率的降低和更紧密复合材料结构的形成。复合材料的拉伸强度增加至2 h的溶解时间，并因较高的溶解时间而略有降低。然而，随着溶解时间的增加，复合材料的杨氏模量显着增加。随着ACC制备过程中溶解时间的增加，ACC表面的吸水率也显着降低，通过使用2小时或更长时间的溶解时间而制备的ACC层压板具有轻微的疏水性。溶解时间为4 h的复合材料的接触角约为76.3°，水滴的完全吸收花费了将近24分钟。通过ATR-FTIR和固态分析表明，纤维素的化学结构和晶体结构发生变化，从而获得了如此高的接触角¹³ C NMR，进一步由WAXD，TGA和DTG分析支持。根据ACC的吸收机理，其吸水率和吸油率呈现出不同的趋势。