当前位置:首页>南京>南京林业大学陈楚楚教授课题组 CEJ:基于碱处理诱导细胞壁溶胀构筑高性能木材膜

南京林业大学陈楚楚教授课题组 CEJ:基于碱处理诱导细胞壁溶胀构筑高性能木材膜

  • 2026-05-01 02:58:36
南京林业大学陈楚楚教授课题组 CEJ:基于碱处理诱导细胞壁溶胀构筑高性能木材膜
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随着可持续材料和绿色制造理念的不断发展,人们对可降解、生物基材料的需求日益增长。传统石油基塑料虽然性能优异,但其难降解特性给生态环境带来了巨大压力。近日,南京林业大学材料科学与工程学院陈楚楚教授团队提出一种基于碱处理的木材结构调控策略,成功制备出兼具高强度、高韧性、良好透明性与耐水性的透明木材膜

实现高强度、高韧性与高透明性的协同提升

传统木基膜材料往往面临“强度高但韧性不足”的问题,本研究通过冷碱溶胀与木材细胞壁微纤维结构重策略,制备获得的木材膜(WF-C24)展现出优异的综合力学性能:拉伸强度530 MPa,韧性达26.9 MJ·m⁻³,断裂伸长率约7.5%。该材料在弯折、扭曲、卷曲甚至打结等复杂变形条件下仍能保持结构完整,并表现出极高的耐折性能,可承受约7600次反复折叠而不发生损坏。

优异湿态稳定性与隔热性能

纤维素材料在水环境中通常易因吸水而发生强度下降。为评估材料的耐水性能,研究团队对不同样品进行了湿态力学性能测试。结果表明,WF-C24在水环境下仍可保持约55 MPa的湿强度,显著优于普通纸材料及部分已报道的纤维素薄膜。此外,通过热稳定性和热导率测试发现,其热导率仅为0.079 W·m⁻¹·K⁻¹,明显低于普通玻璃材料。基于这一特性,研究团队进一步构建了模拟汽车天窗模型,实验结果表明该木材膜能够有效降低车内温度,表现出良好的隔热效果。

可规模化制备与大尺寸构筑

冷碱处理诱导的细胞壁润胀以及部分纤维素溶解与再生过程,不仅显著提升了WF的光学、力学、耐水和耐热性,还通过在断裂界面形成新的氢键作用,实现了裂纹界面的自粘合。经自粘合后的WF仍保持优异的力学性能,其纵向拉伸强度可达228 MPa。同时,这种“自粘合”策略为无需化学胶黏剂的大尺寸木材膜制备提供了新的可能,使剩余或废弃木材能够转化为高性能结构材料,具有良好的规模化应用潜力。

柔性基底应用与可持续材料特性

此外,研究团队还探索了该木材膜在柔性电子与智能包装领域的应用潜力。通过喷墨打印技术在木材膜表面打印二维码标识,其信息能够被手机顺利识别。进一步研究发现,在表面涂覆导电材料后,该木材膜在弯曲或折叠状态下仍能稳定点亮LED灯,展现出优异的柔性和结构稳定性。除功能应用外,该材料还表现出优异的循环利用能力,即可将废弃木材膜重新转化为纤维素微纤维悬浮液,并通过抽滤和热压重新制备为全纤维素纸材料。作为一种完全由纤维素构成的生物基材料,该木材膜同时具有良好的生物降解特性,在自然环境中约3个月即可基本完全降解,体现出显著的环境友好优势。

该工作以题为Facile green strategy for high-strength, wet-resistant, and transparent wood film via alkali cell wall swelling的论文发表在期刊《Chemical Engineering Journal》。论文通讯作者为南京林业大学材料科学与工程学院陈楚楚教授第一作者为2023级研究生周静,该研究受到国家自然科学基金等项目的资助。

原文链接:

https://www.sciencedirect.com/science/article/abs/pii/S1385894726020632

点击下方“阅读原文”可下载该篇论文。

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  1. CONNECT:[ UseTime:0.000749s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001388s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000623s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000560s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001173s ]
  6. SELECT * FROM `set` [ RunTime:0.000515s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001240s ]
  8. SELECT * FROM `article` WHERE `id` = 516420 LIMIT 1 [ RunTime:0.000808s ]
  9. UPDATE `article` SET `lasttime` = 1777644880 WHERE `id` = 516420 [ RunTime:0.001286s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000507s ]
  11. SELECT * FROM `article` WHERE `id` < 516420 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001025s ]
  12. SELECT * FROM `article` WHERE `id` > 516420 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000900s ]
  13. SELECT * FROM `article` WHERE `id` < 516420 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001530s ]
  14. SELECT * FROM `article` WHERE `id` < 516420 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001483s ]
  15. SELECT * FROM `article` WHERE `id` < 516420 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001583s ]
0.152187s