|
|
|
Deinking of Xerox and Laser-Printed Paper q
Moon, T. L., J. Li and R.
Nagarajan. Novel Approaches to Deinking of Xerographic and
Laser-Printed Paper. In “Further Advances in the q
Moon, T. L. and R. Nagarajan.
Deinking of Xerographic and Laser-Printed Paper Using Block Copolymers.
Colloids
and Surfaces A. Physicochem. Eng. Aspects 132, 275-288 (1998).
q
Moon, T. L.; Nagarajan, R. A New
Application of PS-PEO and PMMA-PEO Diblock Copolymers as Deinking Agents for
Office Waste Paper, (manuscript). q
Moon, T. L.; Nagarajan, R. Synergistic
Action of Block Copolymer-Stearic Acid Mixtures in Deinking Office Waste
Paper. (manuscript). Related Graduate
Student Thesis Ø Moon, Theodore (M.S. 96) "Deinking of Xerox and
Laser-Printed Paper Using Block Copolymer Surfactants" Ø Li, Jin (M.S. 97) "Enzyme Enhanced Deinking of Non-Impact
Printed Paper Using Block Copolymers" Ø
Moon, Theodore (Ph.D. 98)
“Mechanism of Action of Block Copolymers in the Deinking of Xerox
and Laser-Printed Paper”
|
|
|
|
A Two-Step Deinking Process |
|
|
|
Deinking Performance of Pluronic Block Copolymers Amount of fiber lost in the deinking process and the
brightness of the recycled paper are measured. The goal is to minimize the fiber loss and
to maximize the brightness. A clean
paper containing no ink has a brightness of 83 on the brightness scale while
the test paper used in the experiments (after pulping and reforming the sheet
but without any ink removed) had a brightness value of 64.9. |
||||||
|
Polymer |
Fiber
Loss Wt % |
Brightness |
||||
|
Polymer
added |
||||||
|
0.1% |
0.25% |
0.5% |
0.1% |
0.25% |
0.5% |
|
|
L81 |
14.7 |
22.7 |
17.8 |
77.0 |
76.8 |
77.8 |
|
L92 |
12.1 |
17.5 |
17.1 |
71.6 |
76.2 |
77.6 |
|
F98 |
14.3 |
26.3 |
30.1 |
75.4 |
78.7 |
79.2 |
|
L101 |
7.8 |
11.9 |
14.2 |
76.6 |
77.5 |
79.6 |
|
P103 |
11.2 |
20.4 |
19.8 |
75.5 |
79.4 |
78.8 |
|
P105 |
12.2 |
26.9 |
22.7 |
74.6 |
78.3 |
79.3 |
|
F108 |
13.6 |
33.9 |
28.7 |
74.5 |
78.5 |
77.5 |