Development and validation of hydrophobic molded pulp nursery pots made of hemp hurd

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies Pub Date : 2024-11-12 DOI:10.1016/j.susmat.2024.e01180

Emma Gordy , Chieh-Yi Lin , Lloyd Nackley , Fei Long , Hong Liu , Jooyeoun Jung , Yanyun Zhao

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引用次数: 0

Abstract

Biodegradable nursery pots (BNPs) composed of 50 % hemp hurd and 50 % recycled cardboard fibers (w/w dry basis) were produced using a custom-built handheld molded pulp device. Milling followed by sequential peracetic acid and sodium hydroxide delignification treatment reduced lignin content of hemp hurd from 23.76 % to 2.39 %, liberating cellulose and hemicellulose fibers for enabling the formation of interfiber interactions in molded pulp formulations. Beeswax and precipitated calcium carbonate based hydrophobic coating at ∼10 μm thickness significantly enhanced hydrophobicity of the BNPs, as indicated by the surface contact and sliding angle of 116.25° and 34.82°, respectively. Anaerobic biodegradability of BNP was confirmed via carbon dioxide and methane gas accumulation measurements. Developed BNPs were successfully validated through an eleven week greenhouse planting trial. This study introduced a new biodegradable molded pulp formulation made from hemp hurd and validated its application as an alternative to single use plastic nursery pots for growing seedlings.

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开发和验证用大麻制成的疏水模塑纸浆育苗盆

生物可降解育苗盆（BNPs）由 50 % 的大麻和 50 % 的回收纸板纤维（重量比干基）组成，使用定制的手持模塑纸浆装置进行生产。磨碎后依次进行过乙酸和氢氧化钠脱木素处理，将大麻秆中的木质素含量从 23.76% 降至 2.39%，释放出纤维素和半纤维素纤维，从而在模塑纸浆配方中形成纤维间相互作用。蜂蜡和沉淀碳酸钙疏水涂层的厚度在 10 μm 以下，这显著增强了 BNPs 的疏水性，表面接触角和滑动角分别为 116.25° 和 34.82°。二氧化碳和甲烷气体累积测量结果证实了 BNP 的厌氧生物降解性。通过为期 11 周的温室种植试验，成功验证了所开发的 BNP。这项研究引入了一种由大麻秆制成的新型可生物降解模塑纸浆配方，并验证了其作为一次性塑料育苗盆的替代品在育苗中的应用。

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来源期刊

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.