Abstract

In this study, we investigated the enzymatical degradability and pilot-scale composting of 14 cellulose-based materials. The materials analyzed here were cellulose regenerated from ionic liquid (EMIM[OAc]), carboxymethyl cellulose (CMC) crosslinked by aluminum salt (Al-salt), methyl cellulose, cellulose acetate, butylated hemicellulose: DS: 1, DS: 0.4, and DS: 0.2, cellophane, wet strength paper, nanocellulose, paper partially dissolved by IL, cellulose carbamate, cellulose palmitate, and cellulose octanoate. The aim of the study was to show how chemical substituting and the substituent itself influence the biodegradability of cellulose materials. The enzymatic degradation and pilot-scale composting of these films shows the correlation between the hydrolysis rate and degree of substitution. The enzymatic hydrolysis of cellulose-based films decreased exponentially as the degree of substitution increased. Modifying cellulose to the extent that it gains the strength needed to obtain good mechanical properties, while retaining its natural biodegradability is an important factor when preparing alternatives for plastic films.

Graphic Abstract

中文翻译：

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具有不同化学结构的纤维素基膜的酶促降解和中试堆肥

摘要

在这项研究中，我们调查了14种纤维素基材料的酶促降解能力和中试规模堆肥。此处分析的材料是从离子液体（EMIM [OAc]）再生的纤维素，通过铝盐（Al-盐）交联的羧甲基纤维素（CMC），甲基纤维素，醋酸纤维素，丁基化半纤维素：DS：1，DS：0.4和DS：0.2，玻璃纸，湿强度纸，纳米纤维素，被IL部分溶解的纸，氨基甲酸酯纤维素，棕榈酸酯纤维素和辛酸纤维素。该研究的目的是表明化学取代和取代基本身如何影响纤维素材料的生物降解性。这些膜的酶促降解和中试规模堆肥表明了水解速率和取代度之间的相关性。随着取代度的增加，纤维素基薄膜的酶促水解呈指数下降。在制备塑料薄膜替代品时，改性纤维素的程度应使其具有获得良好机械性能所需的强度，同时保持其天然生物降解性，这是一个重要因素。

图形摘要