TEMPO oxidation and high-speed blending as a combined approach to disassemble bacterial cellulose

被引：32

作者：

do Nascimento, Eligenes Sampaio ^{[1
]}

Sousa Pereira, Andre Luis ^{[2
]}

Barros, Matheus de Oliveira ^{[3
]}

de Aaraujo Barroso, Maria Karolina ^{[4
]}

Silva Lima, Helder Levi ^{[1
]}

Borges, Maria de Fatima ^{[5
]}

de Andrade Feitosa, Judith Pessoa ^{[2
]}

Cordeiro de Azeredo, Henriette Monteiro ^{[5
,6
]}

Rosa, Morsyleide de Freitas ^{[5
]}

机构：

[1] Fed Univ Ceara UFC, Dept Chem Engn, Block 940, BR-60455760 Fortaleza, Ceara, Brazil

[2] Fed Univ Ceara UFC, Dept Organ & Inorgan Chem, Block 940, BR-60455760 Fortaleza, Ceara, Brazil

[3] Fed Inst Ceara UFC, Dept Chem & Environm, Block 709, BR-60020181 Fortaleza, Ceara, Brazil

[4] Fed Univ Ceara UFC, Dept Food Engn, Block 858, BR-60455760 Fortaleza, Ceara, Brazil

[5] Embrapa Agroind Trop, Rua Dra,Sara Mesquita 2270, BR-60511110 Fortaleza, Ceara, Brazil

[6] Embrapa Instrumentacao, R XV Novembro 1452, BR-13560970 Sao Carlos, SP, Brazil

来源：

CELLULOSE | 2019年 / 26卷 / 04期

关键词：

Bacterial cellulose; TEMPO; Cellulose nanofibrils; Oxidation; MEDIATED OXIDATION; NANOFIBRILLATED CELLULOSE; MECHANICAL-PROPERTIES; NATIVE CELLULOSE; NANOFIBERS; ACID; NANOPARTICLES; SUSPENSIONS; WATER; OPTIMIZATION;

D O I：

10.1007/s10570-018-2208-2

中图分类号：

TB3 [工程材料学]; TS [轻工业、手工业、生活服务业];

学科分类号：

0805 ; 080502 ; 0822 ;

摘要：

The aim of this study was to obtain bacterial cellulose (BC) nanofibrils by using a high speed blender on BC previously oxidized with 2,2,6,6-tetramethyl-1-piperidinoxyl (TEMPO) radical. The resulting oxidized nanofibrillated bacterial cellulose (BCOXNF) was characterized chemically, thermally, and morphologically, presenting high crystallinity index (92%), great dispersion stability (zeta potential, -52mV) and appropriate morphology (40nm in diameter). In addition, freeze dried nanofibrils were evaluated for their redispersibility in water, in order to check whether the process was effective in preventing hornification (nanofibril aggregation upon drying). In fact, the obtained material presented better redispersibility in water (zeta potential, -63mV) after freeze drying when compared to non-oxidized BC. [GRAPHICS] .

引用

页码：2291 / 2302

页数：12

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