Propensity of Lignin to Associate: Light Scattering Photometry Study with Native Lignins

被引：88

作者：

Contreras, Sofia ^{[1
]}

Gaspar, Armindo R. ^{[1
]}

Guerra, Anderson ^{[1
]}

Lucia, Lucian A. ^{[1
]}

Argyropoulos, Dimitris S. ^{[1
]}

机构：

[1] N Carolina State Univ, Coll Nat Resources, Organ Chem Wood Components Lab, Raleigh, NC 27695 USA

来源：

BIOMACROMOLECULES | 2008年 / 9卷 / 12期

关键词：

D O I：

10.1021/bm800673a

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：

Many studies of lignins in solution invoke association and aggregation phenomena to explain their solution behavior (e.g., reprecipitation onto pulp fibers, condensation, etc.). Following their colloidal (apparent) molecular weights in solution as a function of time allows us to explore observable dissociation phenomena. These measurements were carried out using multiple angle laser light scattering (MALLS) photometry in the static mode. The challenges and opportunities of measuring the specific refractive index increment (dn/dC) of lignin solutions and determining the kinetics of the dissociation process were thus investigated. Hardwood and softwood representative lignins were isolated, and method for their full dissolution in THF was further developed, which then lead to accurate dn/dC values being obtained as a function of time. When coupled to additional work using light scattering static measurements and Zimm plots for the same solutions, this effort offers insight into the aggregation and ensuing dissociative events that operate within the lignin macromolecules.

引用

页码：3362 / 3369

页数：8

共 43 条

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