当前位置:首页>南昌>CCC|南昌大学团队:工业固废 + 生物基材料制备双功能微胶囊 实现混凝土自修复 - 螯合协同防腐

CCC|南昌大学团队:工业固废 + 生物基材料制备双功能微胶囊 实现混凝土自修复 - 螯合协同防腐

  • 2026-06-17 14:42:41
CCC|南昌大学团队:工业固废 + 生物基材料制备双功能微胶囊 实现混凝土自修复 - 螯合协同防腐

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文献速览

DOI: 10.1016/j.cemconcomp.2026.106694

关键词

自修复微胶囊;钢筋混凝土;协同抑制腐蚀;基于香叶醇的 Schiff 基化合物;锂矿渣;绿色合成技术

腐蚀环境下钢筋混凝土易开裂、钢筋锈蚀,传统防护常规微胶囊存在性能、环保、成本等短板。本研究以工业锂渣生物基原料制备自修复 - 螯合双功能微胶囊,借助试验理论分析验证其应用效果。该材料可通过物理封堵化学螯合实现协同防护最优掺量下力学修复、抗渗、防腐性能突出原料绿色成本低廉,为混凝土结构长效防腐提供了可行的新技术。

研究出发点

针对现有微胶囊原料不环保功能单一防腐效果有限制备成本高的痛点,本研究以锂渣(工业固废)为乳化剂亚麻籽油(生物基材料)为芯材香草醛席夫碱壁材,采用 Pickering 乳液法制备新型双功能微胶囊。系统探究微胶囊制备工艺碱环境稳定性,评价其对砂浆力学修复抗渗钢筋防腐的作用,结合多表征理论计算揭示物理封堵 + 化学螯合协同防护机理,为绿色智能混凝土防护材料提供新方案。

研究动机的概念框架

技术路线

原料预处理→疏水改性锂渣制备→Pickering 乳液法合成双功能微胶囊微胶囊结构性能表征→不同掺量微胶囊掺入砂浆 / 钢筋试件宏观性能测试(强度、抗渗、电化学腐蚀)→微观形貌、物相、元素分析→DFT 理论计算→解析自修复 - 螯合协同机制→总结最优掺量与应用价值

研究内容

实验材料

核心原料:普通硅酸盐水泥、标准砂、HRB400 钢筋;锂渣、亚麻籽油、香草醛席夫碱;三甲基氯硅烷(改性剂)、去离子水、模拟混凝土孔隙液等;

SAMIC 的合成与制备过程

实验方法

宏观性能测试

  • 力学性能:基准组与掺微胶囊砂浆 3d/28d 抗压强度,预损后强度修复率测试;

  • 耐久性能:RCM 法测试氯离子扩散系数,评价裂缝修复与抗渗能力;

  • 防腐性能:电化学阻抗、动电位极化测试,计算腐蚀抑制效率;

  • 裂缝观测:超景深显微镜实时监测裂缝填充速率与填充率。

微观与物相表征

FTIR 红外光谱、TG-DSC 热分析、XRD 物相分析;SEM-EDS、TEM 微观形貌与元素分布;XPS 表面化学态分析;粒径与 Zeta 电位测试;密度泛函理论(DFT)电子结构计算

合成过程中关键参数的表征

VSB-LS 混合壁材料对微胶囊性能的影响

SAMIC 的结构特征:(a) FTIR 光谱图;(b) SAMIC 与原料的 TG 曲线

不同剂量 SAMIC 对 Fe 的螯合效果

对 SAMIC 在砂浆中的分散状态及稳定性的分析

掺 SAMIC 的砂浆自修复性能的综合评价

受损前后,掺有SAMIC6的砂浆中孔隙尺寸分布的比较

不同 SAMIC剂量下试样的腐蚀电化学行为及微观特性

对钢筋表面腐蚀产物化学状态的 XPS 分析

微裂纹愈合过程的实时监测与定量评估

通过实验和理论验证 SAMIC 的化学钝化效果

SAMIC 在砂浆中的自修复功能以及与其他材料的协同保护作用

核心结论

1、以改性锂渣绿色乳化剂生物基亚麻籽油芯材香草醛席夫碱壁材,可高效制备复合微胶囊,原料绿色低碳,实现工业固废资源化利用

2、该微胶囊混凝土强碱环境结构稳定6% 掺量综合性能最优,可显著修复受损砂浆力学性能抗渗能力

3、体系依靠亚麻籽油皂化物理封堵+席夫碱螯合钝化双重作用实现高效防腐,两种机制协同增效防腐性能远超传统微胶囊。量化得出化学螯合作用整体防腐贡献接近半数,结合理论计算揭示了界面配位的微观作用本质。

4、量化得出化学螯合作用整体防腐贡献接近半数,结合理论计算揭示了界面配位微观作用本质

5、该制备工艺简单原料成本低兼顾环保、力学与防腐性能,适用于海洋、盐碱、冻融等各类腐蚀工况下的钢筋混凝土结构,应用前景广阔。

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  1. CONNECT:[ UseTime:0.000991s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001384s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.001350s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000623s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001552s ]
  6. SELECT * FROM `set` [ RunTime:0.001201s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001482s ]
  8. SELECT * FROM `article` WHERE `id` = 525369 LIMIT 1 [ RunTime:0.002725s ]
  9. UPDATE `article` SET `lasttime` = 1782322488 WHERE `id` = 525369 [ RunTime:0.002987s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000757s ]
  11. SELECT * FROM `article` WHERE `id` < 525369 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001414s ]
  12. SELECT * FROM `article` WHERE `id` > 525369 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002845s ]
  13. SELECT * FROM `article` WHERE `id` < 525369 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002305s ]
  14. SELECT * FROM `article` WHERE `id` < 525369 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.004625s ]
  15. SELECT * FROM `article` WHERE `id` < 525369 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004988s ]
0.233036s