Esterification of cellulose-enriched agricultural by-products and characterization of mechanical properties of cellulosic films

被引：33

作者：

Chauvelon, G

Gergaud, N

Saulnier, L

Lourdin, D

Buléon, A

Thibault, JF

Krausz, P

机构：

[1] INRA, Ctr Rech Agro Alimentaire, F-44316 Nantes 3, France

[2] Univ Limoges, Fac Sci, Lab Chim Subst Nat, F-87060 Limoges, France

来源：

CARBOHYDRATE POLYMERS | 2000年 / 42卷 / 04期

关键词：

wheat bran; maize bran; cellulose; esterification; cellulose laurate; films; mechanical; thermomechanical; calorimetric;

D O I：

10.1016/S0144-8617(99)00187-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two agricultural by-products, wheat bran and maize bran have been examined for their suitability to be transformed into biomaterials by esterification by lauroyl chloride. Influence of biochemical characteristic of cellulose (cellulose content, viscosity-average degree of polymerization, crystallinity) was studied on eight samples enriched in cellulose after chemical removal of heteroxylans and lignin. After an acidic pre-treatment, esterification was carried out with lauroyl chloride and an optimized reaction time of 8 h was used. Chemical compositions were similar for all cellulose esters obtained, but cellulose content of initial material had a marked influence on the amount of esterified product. A film was easily obtained by casting and the mechanical (tensile strength and elongation), thermomechanical and calorimetric properties were determined. The possible role of grafted fatty acid as internal plasticizer was finally discussed. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：385 / 392

页数：8

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