Abstract: The cheap oil-absorbing material is needed to deal with marine oil spill，and bioadsorbent with high oil-absorbing property can be prepared by modification of wheat straw. The effects of temperature，time，solvent，and catalyst on the modification of the straw were discussed. With AA as a reactant，DMF as a solvent，DMAP as a catalyst，reaction time of 2h and temperature of 100 ℃，the oil absorbency of the modified straw reached 13.9 g/g，54.4% more than that of crude straw. The chemical structures of crude and modified straw samples were analyzed by FT-IR. The study provides a foundation for further industrialization.

Key words: straw, anhydride, modification, oil absorbency

摘要： 处理海上溢油需要大量廉价的吸油材料。通过改性小麦秸秆，可以制得具有较高吸油性能的秸秆。考察了温度、时间、试剂、催化剂对秸秆改性的影响。结果表明，以乙酸酐（AA）作反应物，二甲基甲酰胺（DMF）为反应溶剂，4-二甲氨基吡啶（DMAP）作催化剂，反应时间2 h，反应温度100 ℃，秸秆的吸油率达到13.9 g/g，比改性前提高了54.4%，并利用红外光谱对改性前后的秸秆化学结构进行了分析。实验结果为这一工艺技术的工业化奠定了基础。

关键词: 秸秆, 酸酐, 改性, 吸油率