Bio-composite using polyhydroxyalkanoates and sustainable nanofillers derived from cellulose nanofibers and its application for an environmentally friendly packaging material

IF 3.9 3区化学 Q2 POLYMER SCIENCE

Journal of Polymer Science Pub Date : 2024-07-30 DOI:10.1002/pol.20240419

Jaemin Jo, Bonwook Koo

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引用次数: 0

Abstract

Polyhydroxyalkanoates (PHA) is a carbon neutral material that contributes to reducing greenhouse gas emissions due to manufactured from biomass and easily degraded by the enzymatic effects of microorganisms in the natural environment. However, PHA exhibits poorer mechanical properties and processability compared with petroleum-based plastics. This study used cellulose nanofiber (CNF) to improve limit of PHA. Moreover, CNF was silylated to reduce polarity difference with PHA and enhance the dispersibility of nanocellulose at PHA. At a result, the silylation process was successfully performed by Si-CH₃ stretching peaks in Fourier transform infrared spectroscopy spectra and hydrophobicity of TEOS-MTES-CNF (TECNF) was confirmed by observed water contact angle (147°). In addition, nanostructure of TECNF was maintained during silylation and drying process through field emission scanning electron microscopy. Moreover, the PHA/TECNF composite showed enhanced processability, and tensile strength was increase almost 37% (0.52 MPa) compared with PHA. Oxygen transmission rates (300 cc/m²۰day) and single lap shear strength (225 kPa) were determined to be at least equivalent or superior to those of commercial packaging materials. Therefore, TECNF could be considered as a reinforcing agent, nucleating agent, and plasticizer in PHA. Also, this composite has possibilities to using as environmentally friendly packaging materials.

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使用从纤维素纳米纤维中提取的聚羟基烷酸酯和可持续纳米填料的生物复合材料及其在环保包装材料中的应用

聚羟基烷酸酯（PHA）是一种碳中和材料，由生物质制造而成，在自然环境中很容易被微生物的酶作用降解，因此有助于减少温室气体排放。然而，与石油基塑料相比，PHA 的机械性能和加工性能较差。本研究使用纤维素纳米纤维（CNF）来提高 PHA 的极限。此外，还对 CNF 进行了硅烷化处理，以减少与 PHA 的极性差异，提高纳米纤维素在 PHA 中的分散性。结果，通过傅里叶变换红外光谱光谱中的 Si-CH3 伸展峰成功地完成了硅烷化过程，并通过观察到的水接触角（147°）证实了 TEOS-MTES-CNF （TECNF）的疏水性。此外，通过场发射扫描电子显微镜，TECNF 的纳米结构在硅烷化和干燥过程中得以保持。此外，PHA/TECNF 复合材料显示出更强的可加工性，拉伸强度比 PHA 提高了近 37% （0.52 兆帕）。氧气透过率（300 cc/m2۰天）和单圈剪切强度（225 kPa）至少等同于或优于商业包装材料。因此，TECNF 可被视为 PHA 的增强剂、成核剂和增塑剂。此外，这种复合材料还有可能用作环保包装材料。

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来源期刊

Journal of Polymer Science POLYMER SCIENCE-

CiteScore

6.30

自引率

5.90%

发文量

264

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology.