Soil erosion is a major environmental threat. The purpose of this study was to develop new polymer soil improvers that could mitigate the risk of soil erosion by modifying the microstructure of the soil and improving the ecological self-repair ability. In particular, this study investigated new polymer composites (ADNB) based on different combination ratios of nano-aqueous adhesive (NAB) and superabsorbent resin (SARn). The effects of different types of ADNB on soil water characteristics and pore size distribution were systematically investigated using nuclear magnetic resonance (NMR). In addition, an empirical model based on experimental data was developed to describe the effects of ADNB on the soil-water characteristic curves. The results showed that in comparison to natural soil, the application of ADNB could significantly increase the peak signal strength of the relaxation time curve. In addition, ADNB can effectively reduce the number of pores with diameters of 1.11–8.3 μm, increase the number of pores with diameters of 0.5–1.8 μm, but had little effect on the number of pores with diameters of 0–0.5 μm. Through NMR imaging analysis, the effects of ADNB on soil moisture absorption and storage were quantified. The results showed that the ratio and content of ADNB have an obvious effect on the soil-water characteristic curve under low suction but showed little effect under high suction conditions, indicating that the water-holding capacity has been improved.

中文翻译：

---

新型聚合物复合材料改善粉质黏土微观结构：使用核磁共振进行评估

土壤侵蚀是主要的环境威胁。本研究的目的是开发新的聚合物土壤改良剂，通过改变土壤的微观结构和提高生态自修复能力来降低土壤侵蚀的风险。特别是，本研究研究了基于纳米水性粘合剂 (NAB) 和高吸水性树脂 (SARn) 的不同组合比例的新型聚合物复合材料 (ADNB)。使用核磁共振 (NMR) 系统地研究了不同类型的 ADNB 对土壤水分特征和孔径分布的影响。此外，还开发了基于实验数据的经验模型来描述 ADNB 对土壤-水特征曲线的影响。结果表明，与天然土壤相比，ADNB的应用可以显着增加弛豫时间曲线的峰值信号强度。此外，ADNB可以有效减少1.11-8.3 μm孔径的孔数，增加0.5-1.8 μm孔径的孔数，但对0-0.5 μm孔径的孔数影响不大。通过核磁共振成像分析，量化了ADNB对土壤水分吸收和储存的影响。结果表明，ADNB的配比和含量对低吸力条件下的土壤-水分特征曲线有明显影响，而在高吸力条件下影响不大，表明保水能力有所提高。增加直径为 0.5-1.8 μm 的孔数，但对直径为 0-0.5 μm 的孔数影响不大。通过核磁共振成像分析，量化了ADNB对土壤水分吸收和储存的影响。结果表明，ADNB的配比和含量对低吸力条件下的土壤-水分特征曲线有明显影响，而在高吸力条件下影响不大，表明保水能力有所提高。增加直径为 0.5-1.8 μm 的孔数，但对直径为 0-0.5 μm 的孔数影响不大。通过核磁共振成像分析，量化了ADNB对土壤水分吸收和储存的影响。结果表明，ADNB的配比和含量对低吸力条件下的土壤-水分特征曲线有明显影响，而在高吸力条件下影响不大，表明保水能力有所提高。