当前位置:首页>南昌>南昌大学 王信刚团队:固废锂渣与生物基材料构建仿生防护,自愈合与螯合双功能微胶囊实现98.76%钢筋缓蚀效率!

南昌大学 王信刚团队:固废锂渣与生物基材料构建仿生防护,自愈合与螯合双功能微胶囊实现98.76%钢筋缓蚀效率!

  • 2026-06-25 12:51:32
南昌大学 王信刚团队:固废锂渣与生物基材料构建仿生防护,自愈合与螯合双功能微胶囊实现98.76%钢筋缓蚀效率!

自愈合

微胶囊

固废锂渣与生物基材料构建仿生防护,自愈合与螯合双功能微胶囊实现98.76%钢筋缓蚀效率!

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本文字数2600;预计阅读时长6分钟

基本信息

英文题目:A biomimetic protection system for reinforced concrete based on industrial solid waste and bio-based materials: Synergistic anti-corrosion microcapsules with dual functions of self-healing and chelation

中文题目:基于工业固废与生物基材料的钢筋混凝土仿生防护体系:自愈合与螯合双功能协同缓蚀微胶囊

关键词:自愈合微胶囊;钢筋混凝土;协同缓蚀;香草醛席夫碱;锂渣;绿色合成

出版年份:2026年

来源:Cement and Concrete Composites(中科院一区TOP,IF=13.1)

第一作者:Ma chao(南昌大学)

通讯作者:王信刚(南昌大学)

单位:南昌大学 基础设施工程学院;江西省先进土木工程材料与绿色智能建造重点实验室;流域碳中和技术教育部工程研究中心

导语

传统微胶囊防腐技术多依赖单一物理填充,缓蚀效率仅30%-90%,且常用石油基或有毒化学品,高成本与高环境负担并存。本研究突破常规,提出“自愈合+螯合”双机制协同策略,巧妙利用工业固废锂渣替代乳化剂,利用生物基香草醛席夫碱作为智能壳材,利用亚麻籽油作为绿色芯材。该体系不仅能通过亚麻籽油皂化物理封堵裂缝,更能通过壳材的C=N键化学螯合腐蚀产生的Fe²⁺,实现双重防护。6 wt%掺量下,砂浆强度恢复率达136.13%,钢筋缓蚀效率高达98.76%!

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PART 1

研究背景

钢筋混凝土在侵蚀环境下易发生钢筋腐蚀,现有微胶囊防护技术面临三大挑战:一是传统脲醛树脂壳材、异氰酸酯芯材及合成乳化剂造成高环境负担;二是依赖单一物理填充机制,缓蚀效率普遍偏低(30-85%);三是复杂合成工艺与昂贵乳化剂导致高成本,阻碍规模化应用。尽管已有研究尝试引入植物油芯或天然高分子壳,但多为单一维度的替代,缺乏从芯材、壳材到乳化剂的全链条绿色化设计。此外,如何突破物理填充的单一机制,引入化学钝化协同增效,仍是当前研究尚未解决的难题。

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PART 2

研究出发点

构建一个兼具自愈合(物理屏障)与螯合(化学钝化)双功能、且全链条绿色低碳的新型微胶囊体系;以工业固废锂渣替代昂贵有机乳化剂,以香草醛席夫碱(VSB)作为智能壳材,以亚麻籽油为绿色芯材,实现物理隔离与化学钝化的协同防腐,并定量解析各机制贡献。

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PART 3

研究内容

本研究以“绿色芯材-智能壁材-固废乳化剂”为设计理念,系统构建并解析了SAMIC的协同缓蚀机制:采用疏水改性锂渣(LS)作为Pickering乳化稳定剂替代传统表面活性剂,包裹天然亚麻籽油(遇碱皂化形成物理屏障),并以香草醛合成的席夫碱(VSB)作为壳材(C=N键特异性螯合Fe²⁺形成化学钝化层);实验证实6 wt%为最佳掺量,此时砂浆抗压强度恢复率达136.13%,氯离子扩散愈合率达35.17%;电化学阻抗谱与Tafel测试表明其缓蚀效率高达98.76%,XPS与DFT计算从原子尺度验证了VSB-Fe²⁺配位键的形成及电子结构优化,且通过对比传统微胶囊定量揭示化学螯合贡献约占48.21%,远超单一物理修复系统。

(图名都统一放在图片下方)

研究动机概念框架

SAMIC的合成与制备过程

合成过程关键参数的表征: VSB的1H NMR谱; 不同粒径LS颗粒的Zeta电位; TMCS改性前后LS颗粒的接触角; LS颗粒的粒径分布

VSB-LS复合壁材对微胶囊性能的影响

SAMIC对Fe²⁺的螯合性能

 SAMIC0和SAMIC6在不同腐蚀时期的拟合电阻; SAMIC0和SAMIC6腐蚀产物的微观形貌及元素分布

钢筋工作面腐蚀产物表面化学状态的XPS分析: 全谱, C 1s, Fe 2p, N 1s

CVMIC的微观形貌与核壳结构; CVMIC和SAMIC试样腐蚀23 d后的Tafel曲线对比; VSB及其Fe²⁺配合物的静电势图和前线轨道

SAMIC在砂浆中的自愈合与螯合协同防护机制

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PART 4

研究结论

(1) 全链条绿色微胶囊制备成功:利用疏水改性锂渣作为Pickering乳化剂,VSB为壳材,亚麻籽油为芯材,成功制备了SAMIC,实现了原料与合成过程的双重环保。

(2) 优异的力学恢复与耐久性:6 wt% SAMIC在碱性环境中保持稳定,抗压强度恢复率高达136.13%,氯离子渗透愈合率为35.17%,亚麻籽油皂化产物有效填充微裂缝与孔隙。
(3) 高效的双功能协同缓蚀:
物理屏障(亚麻籽油皂化)与化学钝化(VSB螯合Fe²⁺)协同作用,缓蚀效率达98.76%;XPS与DFT证实了Fe-N配位键的形成及电子结构优化。
(4) 化学钝化贡献的定量解析:
对比传统微胶囊,VSB壳材引发的化学螯合贡献约48.21%的缓蚀增强,验证了自愈合/螯合协同机制的显著优势。

= END =

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  1. CONNECT:[ UseTime:0.000707s ] mysql:host=127.0.0.1;port=3306;dbname=aa460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001041s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000327s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000324s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000717s ]
  6. SELECT * FROM `set` [ RunTime:0.000234s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000741s ]
  8. SELECT * FROM `article` WHERE `id` = 524666 LIMIT 1 [ RunTime:0.000427s ]
  9. UPDATE `article` SET `lasttime` = 1782417174 WHERE `id` = 524666 [ RunTime:0.027629s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.001109s ]
  11. SELECT * FROM `article` WHERE `id` < 524666 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000540s ]
  12. SELECT * FROM `article` WHERE `id` > 524666 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.006966s ]
  13. SELECT * FROM `article` WHERE `id` < 524666 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000816s ]
  14. SELECT * FROM `article` WHERE `id` < 524666 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.003643s ]
  15. SELECT * FROM `article` WHERE `id` < 524666 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.004931s ]
0.121549s