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通过熔融挤出实现木质素颗粒的自形成用于活性可生物降解食品包装

Self-Formation of Lignin Particles Through Melt-Extrusion for Active Biodegradable Food Packaging.

作者信息

Hararak Bongkot, Wijaranakul Pawarisa, Wanmolee Wanwitoo, Kraithong Wasawat, Keeratipinit Kawin, Kaewket Sanya, Winotapun Charinee, Rungseesantivanon Wuttipong

机构信息

National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Khlong-Nueng, Khlong Luang, Pathumthani 12120, Thailand.

National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency, Khlong-Nueng, Khlong Luang, Pathumthani 12120, Thailand.

出版信息

ACS Omega. 2024 May 29;9(23):24346-24355. doi: 10.1021/acsomega.3c10113. eCollection 2024 Jun 11.

DOI:10.1021/acsomega.3c10113
PMID:38882124
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11171092/
Abstract

This study presents a method for the self-formation of lignin particles within a polylactic acid (PLA) matrix during melt-extrusion, eliminating the need for separation and drying steps typically associated with submicro-size lignin particles. This method effectively mitigates the problem of agglomeration often associated with the drying step. Softwood kraft lignin, guaiacyl lignin (GL-lignin), was dissolved in low-molecular-weight poly(ethylene glycol) (PEG) and was introduced into a twin-screw extruder using a liquid feeder. Lignin particles within a particle size range of 200-500 nm were observed in the extrudate of the PLA/PEG/GL-lignin composites. PLA/PEG/GL-lignin composite films were produced through blown film extrusion. These composite films demonstrated superior ultraviolet (UV)-barrier and antioxidant properties compared to neat PLA films, with optical and mechanical characteristics comparable to those of neat PLA. Moreover, migration values of the composite films in various food simulants were below regulatory limits, suggesting their potential for food packaging applications. This self-formation process offers a promising approach for utilizing lignin for PLA applications.

摘要

本研究提出了一种在熔融挤出过程中，在聚乳酸（PLA）基体中自形成木质素颗粒的方法，无需通常与亚微米级木质素颗粒相关的分离和干燥步骤。该方法有效缓解了通常与干燥步骤相关的团聚问题。将软木硫酸盐木质素、愈创木基木质素（GL-木质素）溶解在低分子量聚乙二醇（PEG）中，并使用液体进料器将其引入双螺杆挤出机。在PLA/PEG/GL-木质素复合材料的挤出物中观察到粒径范围为200-500nm的木质素颗粒。通过吹膜挤出制备了PLA/PEG/GL-木质素复合薄膜。与纯PLA薄膜相比，这些复合薄膜表现出优异的紫外线（UV）阻隔和抗氧化性能，其光学和机械特性与纯PLA相当。此外，复合薄膜在各种食品模拟物中的迁移值低于监管限值，表明其在食品包装应用中的潜力。这种自形成过程为将木质素用于PLA应用提供了一种有前景的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/ed1d91567a32/ao3c10113_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/ba756ed79a26/ao3c10113_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/74a3dfa40c67/ao3c10113_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/b3914bd09517/ao3c10113_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/cc0bcf086498/ao3c10113_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/44a39ea4b88c/ao3c10113_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/17658bbc6d09/ao3c10113_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/ed1d91567a32/ao3c10113_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/ba756ed79a26/ao3c10113_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/74a3dfa40c67/ao3c10113_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/b3914bd09517/ao3c10113_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/cc0bcf086498/ao3c10113_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/44a39ea4b88c/ao3c10113_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/17658bbc6d09/ao3c10113_0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/02a6/11171092/ed1d91567a32/ao3c10113_0007.jpg

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Polymers (Basel). 2023 Feb 16;15(4):989. doi: 10.3390/polym15040989.
2
Physicochemical properties of lignin nanoparticles from softwood and their potential application in sustainable pre-harvest bagging as transparent UV-shielding films.软木木质素纳米颗粒的物理化学性质及其作为透明紫外线屏蔽薄膜在可持续收获前套袋中的潜在应用。
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Lignocellulose dissociation with biological pretreatment towards the biochemical platform: A review.
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Transparency of polymeric food packaging materials.高分子食品包装材料的透明度。
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