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南京农业大学:基于纳米纤维素的凝胶膜活性包装,集成了高灵敏度监测和保存

  • 2026-04-24 15:20:21
南京农业大学:基于纳米纤维素的凝胶膜活性包装,集成了高灵敏度监测和保存

南京农业大学食品科技学院团队在《Chemical Engineering Journal》(IF 13.2)发表题为“Nanocellulose-based gel film active packaging with integrated highly sensitive monitoring and preservation”的研究论文。本研究聚焦于解决传统食品包装无法同时实现保鲜与腐败指示的问题,开发出集高灵敏监测与保鲜功能于一体的纳米纤维素基CMEH凝胶膜活性包装材料

通过SEM、FTIR、Zeta电位、XRD、BET、XPS及体外释放实验可知,以锌源、2-ambzim、2-MeIM为原料经一步法合成并接枝反-2-己烯醛(E2H),成功制备了ZIF-8-NH₂@E2H复合保鲜剂;该材料保持了ZIF-8的规则多面体形貌与完整晶体结构,表面成功引入氨基并接枝E2H,电位由负转正后略有回落,具备多孔结构与高比表面积,可实现E2H的长效可控缓释(168 h累积释放率约80%,远优于游离E2H的24 h暴释),释放行为符合一级动力学模型,为后续智能包装膜的制备提供了性能优异的功能组分。

通过SEM、比表面积/孔隙率测试、FT-IR、XRD、XPS、膜通透性、胞内物质释放、脂质过氧化、生物膜活性、BET及pH/气体显色实验综合证实,以纳米纤维素为基材,依次负载 ZIF-8-NH₂@E2H复合保鲜剂与花青素,经冷热交替干燥成功制备了CMEH智能凝胶膜;该膜形成均匀连续的三维多孔网络结构,各组分通过氢键与共价键稳定复合,兼具高孔隙率、高比表面积与优异结构稳定性;其中预干燥8 h制备的CMEH-8样品结构最优,对pH 2~13及不同浓度酸碱挥发物的显色响应最灵敏,可通过多途径协同发挥强效抗菌作用:破坏细菌细胞膜、引发脂质过氧化、诱导胞内蛋白质与核酸泄露、造成酶与 DNA/RNA 损伤、抑制生物膜形成,对大肠杆菌和金黄色葡萄球菌均展现出高效杀灭能力,为后续果蔬与肉类的保鲜及实时品质监测应用奠定了坚实的材料基础。

通过溶解率、溶胀率、水蒸气透过率、颜色稳定性、循环压缩力学测试、E2H释放实验、抗氧化实验及全谱抗菌实验综合证实,CMEH智能凝胶膜兼具优异的理化稳定性、力学回弹性、长效E2H控释性能、强抗氧化性与广谱抗菌活性,可高效杀灭食品常见腐败细菌与真菌,为果蔬与肉类的长效保鲜提供了性能全面的功能包装材料。

通过蓝莓(20℃)与猪肉(4℃)的双体系保鲜实验综合证实,CMEH 智能凝胶膜可同时适配果蔬与肉类的保鲜需求,实现长效保鲜实时可视化监测的双重功能:在蓝莓保鲜中,该膜将常温货架期从6天显著延长至12天,有效抑制果实呼吸代谢、水分流失与腐烂,维持果霜完整性、硬度、可滴定酸与可溶性固形物含量,同时通过膜色变化精准反映腐败进程,GC-IMS分析证实其可完整保留蓝莓原有风味;在猪肉冷藏保鲜中,该膜将4℃食用期从不足5天延长至15天以上,显著抑制失重、脂肪氧化、蛋白质分解与菌落增殖,15天时 TVB-N、TBA、TVC等关键腐败指标均远低于安全限值,同时维持肉色红润新鲜。两类实验共同验证了CMEH凝胶膜的广谱保鲜性能与高灵敏监测能力,为生鲜食品的绿色智能包装提供了高效解决方案。

综上,本研究成功制备了集高效保鲜、实时显色监测与环境友好特性于一体的CMEH纳米纤维素基智能凝胶膜,通过冷热交替干燥工艺构建的三维多孔网络结构,实现了ZIF-8-NH₂@E2H复合保鲜剂与花青素显色剂的高效负载与功能协同。该材料不仅显著延长了蓝莓(20℃)货架期至12天、猪肉(4℃)食用期至15天以上,有效抑制腐败微生物生长与品质劣变,且具备优异的酸碱气体响应性能与可降解特性,从结构与功能层面解决了传统包装缺乏长效保鲜与可视化监测的核心痛点。本研究为多功能食品级智能包装材料的开发提供了坚实的理论支撑与实践指导,显著拓宽了纳米纤维素、MOF材料及天然活性成分在现代食品包装领域的应用前景,为构建高灵敏、高性能、绿色可持续的食品保鲜包装体系提供了创新的技术方案。

撰稿:张依伟
审核:刘广洋
原文链接:https://www.x-mol.com/paperRedirect/2037283878835662848

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  1. CONNECT:[ UseTime:0.001155s ] mysql:host=127.0.0.1;port=3306;dbname=h_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001664s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000776s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000666s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001370s ]
  6. SELECT * FROM `set` [ RunTime:0.000563s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001538s ]
  8. SELECT * FROM `article` WHERE `id` = 508080 LIMIT 1 [ RunTime:0.009614s ]
  9. UPDATE `article` SET `lasttime` = 1777020054 WHERE `id` = 508080 [ RunTime:0.007386s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.001853s ]
  11. SELECT * FROM `article` WHERE `id` < 508080 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001192s ]
  12. SELECT * FROM `article` WHERE `id` > 508080 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.007548s ]
  13. SELECT * FROM `article` WHERE `id` < 508080 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.008572s ]
  14. SELECT * FROM `article` WHERE `id` < 508080 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.040871s ]
  15. SELECT * FROM `article` WHERE `id` < 508080 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.055247s ]
0.305213s