Polyvinylamine-graft-TEMPO Adsorbs onto, Oxidizes, and Covalently Bonds to Wet Cellulose

被引：26

作者：

Pelton, Robert ^{[1
]}

Ren, Pengchao ^{[1
]}

Liu, Jieyi ^{[1
]}

Mijoloyic, Darijo ^{[2
]}

机构：

[1] McMaster Univ, Dept Chem Engn, Hamilton, ON L8S 4L7, Canada

[2] BASF AG, D-67056 Ludwigshafen, Germany

来源：

BIOMACROMOLECULES | 2011年 / 12卷 / 04期

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

WATER-INSOLUBLE FRACTIONS; PRIMARY ALCOHOL GROUPS; MEDIATED OXIDATION; NATIVE CELLULOSE; REGENERATED CELLULOSE; SELECTIVE OXIDATION; CHEMICAL-MODIFICATION; NEUTRAL CONDITIONS; CARBOXYLATE GROUPS; CELLOURONIC ACID;

D O I：

10.1021/bm200101b

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Described is a new greener approach to increasing adhesion between wet cellulose surfaces. Polyvinylamine (PVAm) with grafted TEMPO spontaneously adsorbs onto cellulose and oxidizes the C6 hydroxyl to aldehyde. groups that react to form covalent bonds with primary amines on PVAm. Grafted TEMPO offers two important advantages over solutions of low-molecular-weight water-soluble TEMPO derivatives. First, the oxidation of porous cellulose wood fibers is restricted to the exterior surfaces accessible to high-molecular-weight PVAm. Thus, fibers are not weakened by excessive oxidation of the interior fiber wall surfaces. The econd advantage of tethered TEMPO is that the total dose of TEMPO required to oxidize dilute fiber suspensions is much less than that required by water-soluble TEMPO derivatives. PVAm-TEMPO is stable under oxidizing conditions. The oxidation :activity of the immobilized TEMPO was demonstrated by the conversion of methylglyoxal to pyruvic acid.

引用

页码：942 / 948

页数：7

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