食品与发酵工业 >

2025 , Vol. 51 >Issue 5: 254 - 263

DOI: https://doi.org/10.13995/j.cnki.11-1802/ts.039139

研究报告

改性竹纤维/聚乳酸复合材料的制备及其在草莓包装中的应用研究

  • 罗国荣 ,
  • 高玺捷 ,
  • 李万菊 ,
  • 徐丹 ,
  • 任丹
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  • 1(西南大学 食品科学学院,重庆,400715)
    2(广东省森林培育与保护利用重点实验室,广东 广州,510520)
    3(西南大学,果蔬物流保鲜与营养品质调控研究中心,重庆,400715)
第一作者:硕士研究生(任丹副教授为通信作者,E-mail:rendan0709@swu.edu.cn)

收稿日期: 2024-03-07

  修回日期: 2024-04-13

  网络出版日期: 2025-03-28

基金资助

广东省森林培育与保护利用重点实验室开放基金资助项目(SPU 2023-06);国家自然科学基金项目(32001263);重庆市科学技术局技术创新与应用发展重点项目(CSTB2022TIAD-KPX0087)

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Preparation of modified bamboo fiber/PLA composite and its application in strawberry packaging

  • LUO Guorong ,
  • GAO Xijie ,
  • LI Wanju ,
  • XU Dan ,
  • REN Dan
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  • 1(School of Food Science, Southwest University, Chongqing 400715, China)
    2(Guangdong Key Laboratory of Forest Cultivation, Protection and Utilization, Guangzhou 510520, China)
    3(Fruit and Vegetable Logistics Preservation and Nutrition Quality Control Research Center, Southwest University, Chongqing 400715, China)

Received date: 2024-03-07

  Revised date: 2024-04-13

  Online published: 2025-03-28

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摘要

随着绿色环保意识的增强,可降解植物纤维/高分子复合材料的食品包装受到广泛关注。然而亲水性竹纤维(bamboo fiber,BF)与疏水性聚乳酸(polylactic acid,PLA)之间的界面不相容性削弱了BF在复合材料中的力学增强效果,因此复合材料的界面调控尤为重要。该文探究了氧化石墨烯(graphene oxide,GO)改性BF对PLA基复合材料性能的影响,并将该PLA基复合材料作为草莓托盘包装,研究其对草莓贮藏品质的影响。结果表明,纤维的加入可提高复合材料的模量,其中GOBF/PLA的改善效果最显著(较纯PLA,GOBF/PLA的弯曲和拉伸模量分别提高了16.39%和35.90%)。GOBF/PLA具有更高的玻璃化转变温度,呈现出较好的界面结合性能。与BF相比,GOBF的异相成核能力更强,促使GOBF/PLA具有更低的冷结晶温度和更高的结晶度。扫描电镜结果显示,BF/PLA弯曲断面有大量孔洞和微裂缝,GOBF/PLA的则仅有少量微裂缝。亲水性纤维的加入降低了复合材料的强度和憎水性,但与BF相比,GOBF对材料强度和憎水性的影响较小。草莓贮藏结果显示,GOBF/PLA可显著降低草莓果实的腐烂率,且延缓贮藏后期草莓果实可滴定酸含量的下降,对草莓果实具有更好的保鲜效果。综上,该研究可为一次性使用、绿色环保果蔬托盘的开发和应用提供参考。

关键词： 复合材料; 改性竹纤维; 聚乳酸; 界面相容性; 草莓包装

本文引用格式

罗国荣 , 高玺捷 , 李万菊 , 徐丹 , 任丹 . 改性竹纤维/聚乳酸复合材料的制备及其在草莓包装中的应用研究[J]. 食品与发酵工业, 2025 , 51(5) : 254 -263 . DOI: 10.13995/j.cnki.11-1802/ts.039139

Abstract

With the increasing awareness of green environmental protection, food packaging with degradable plant fiber/polymer composite materials has been widely concerned.However, the interfacial incompatibility between hydrophilic bamboo fiber (BF) and hydrophobic polylactic acid (PLA) weakens the mechanical strengthening effect of BF in composite materials, making the regulation of interfacial properties crucial.Firstly, the effect of BF modified by graphene oxide (GO) on the properties of PLA-matrix composites were investigated.Subsequently, the PLA-based composite material was used as a strawberry tray packaging to explore its influence on the storage quality of strawberries.It was found that the addition of fiber could improve the modulus of the composite, and the improvement effect of GOBF/PLA was the most significant (compared with pure PLA, the bending and tensile modulus of GOBF/PLA were increased by 16.39% and 35.90%, respectively).GOBF/PLA had higher glass transition temperature and better interface bonding performance.Compared to BF, GOBF possessed stronger heterogeneous nucleation capability resulting in lower cold crystallization temperature values and higher crystallinity values for GOBF/PLA.The SEM analysis revealed that the cross-section after bending failure of BF/PLA exhibited numerous holes and micro-cracks;conversely, GOBF/PLA displayed fewer micro-cracks.The addition of hydrophilic fiber reduced the strength and hydrophobicity of the composite, but the effect of GOBF on the strength and hydrophobicity of the composite was less than that of BF.The results of strawberry storage showed that GOBF/PLA could significantly reduce the decay rate of strawberry fruits and delay the decrease of titrable acid content in strawberry fruits at the later stage of storage, which had better fresh-keeping effect on strawberry fruits.In conclusion, this study can provide reference for the development and application of disposable green fruit and vegetable trays.

Key words： composites; treated bamboo fiber; polylactic acid; interface compatibility; strawberry packaging

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