改性木质纤维土壤保水材料的制备及性能研究  

Study on Preparation and Performances of Modified Wood Fiber Soil Water Retention Materials

作　　者：王小勇 牛俊婕 张丽莹 邱叶童 王火旺 刘泽华[1] WANG Xiaoyong;NIU Junjie;ZHANG Liying;QIU Yetong;WANG Huowang;LIU Zehua(National Key Lab of Bio-based Fiber Materials,Tianjin Key Lab of Pulp and Paper,China Key Lab of Papermaking and Biomass Refining for Light Industry,Key Lab of High-performance Fiber Wet-laid Nonwoven Materials for Textile Industry,Tianjin University of Science and Technology,Tianjin,300457)

机构地区：[1]天津科技大学生物基纤维材料全国重点实验室,天津市制浆造纸重点实验室,中国轻工业造纸与生物质精炼重点实验室,纺织行业高性能纤维湿法非织造材料重点实验室,天津300457

出　　处：《中国造纸》2025年第4期79-89,共11页China Pulp & Paper

摘　　要：本研究以木材加工过程中产生的木粉为纤维来源,通过化学热磨机械制浆法预处理及碱性过氧化氢漂白后,经TEMPO氧化及胶体磨处理得到改性木质纤维(CRF)。随后与聚谷氨酸(PGA)、丙烯酸(AA)和丙烯酰胺(AM)通过紫外光聚合,制备复合土壤保水材料(PGA-CRF/SWR)。结果表明,添加6%的CRF可显著提高土壤保水材料的力学性能,压缩强度由0.0108 MPa提高到0.0351 MPa。并且随着PGA用量由3%增加到12%时,压缩强度进一步提高到0.0467 MPa。在水温为30℃、pH值为7时,PGA-CRF/SWR的吸水倍率和保水倍率达到最佳,并且当CRF和PGA用量均为6%时,PGA-CRF/SWR在去离子水和自来水中的最佳吸水倍率分别为688.5和298.7 g/g,保水倍率为655.7和277.9 g/g;经过5次吸水润胀循环后吸水倍率仍能达到初始的62.2%;土壤掩埋60天后剩余质量为79.2%;在温度低于309.1℃时表现出良好的热稳定性。In this study,wood powder produced during wood processing was used as the fiber source.After pretreatment by chemical thermome⁃chanical pulping and alkaline hydrogen peroxide bleaching,modified wood fiber(CRF)was obtained by TEMPO oxidation and colloid milling.Subsequently,the composite soil water retention material(PGA-CRF/SWR)was prepared by ultraviolet polymerization with polyglutamic acid(PGA),acrylic acid(AA),and acrylamide(AM).The results showed that adding CRF with the dosage of 6%could significantly improve the mechanical properties of the soil water retention material,and the compressive strength increased from 0.0108 MPa to 0.0351 MPa.As the dos⁃age of PGA increased from 3%to 12%,the compressive strength further increased to 0.0467 MPa.When the pH value was 7 and the water tem⁃perature was 30℃,the water absorption rate and water retention rate of PGA-CRF/SWR reached the best,and when the dosages of CRF and PGA were both 6%,the best water absorption rate of PGA-CRF/SWR in deionized water and tap water were 688.5 and 298.7 g/g,respectively,and the water retention rate were 655.7 and 277.9 g/g.After 5 cycles of water absorption and swelling,the water absorption rate could still reach 62.2%of the initial value,the residual mass after soil burial for 60 days was 79.2%,which showed good thermal stability before 309.1℃.

关 键 词：木粉 聚谷氨酸 紫外光聚合 复合土壤保水材料 

分 类 号：TS79[轻工技术与工程—制浆造纸工程]