Pitch fixative selection by capillary electrophoresis
McLean, DS and Breadmore, MC and Stack, KR and Richardson, DE and Haddad, PR (2006) Pitch fixative selection by capillary electrophoresis. Appita Journal, 59 (5). pp. 391-395. ISSN 1038-6807
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Wood pitch deposition has antagonised
the papermaker for over two hundred
years. Fixatives, chemistries which are
used to attach wood resin to wood fibre,
have been used to alleviate wood pitch
deposition to varying degrees of success.
This paper aims to present a new method
by which fixatives can be evaluated at a
molecular level in a short period of time.
Capillary Electrophoresis (CE) is used in
many industries, including pulp and paper,
as an analytical technique for the separation
of analytes under the application of an
electric field whereby the differences in
the electrophoretic mobilities of the analytes
lead to their separation. This paper
makes use of CE, not for its separation of
analytes but for quantification of interactions
between analytes and selectivity
modifiers. Electrokinetic chromatography
(EKC) is a variation of CE where a selectivity
modifier is included in the electrolyte.
In using wood resin fixatives as selectivity
modifiers and wood resin components as
analytes, we were able to determine their
interactions at a variety of pHs and temperatures.
The result of this development
is the ability to recommend a given fixative
chemistry for the unique pH, temperature
and extractive composition of a given pulp
and/or paper mill.
Details of the methods, results and data
interpretation are included in this paper.
|Keywords:||capillary electrophoresis, wood pitch,
pitch deposition, resin acids,
fixatives, paper making|
|Deposited By:||Mr Marcus Guijt|
|Deposited On:||06 Jun 2008 14:27|
|Last Modified:||18 Jul 2008 21:00|
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