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EFFECT OF UV-TREATMENT ON
PROPERTIES OF COATED PAPER
WITH BIOPOLYMERS
Urška Vrabič Brodnjak, PhD
University of Ljubljana, ...
Why biopolymers?
Coatings with biopolymers
 Research focus
 Results
 Summary
EFPRO-CEPI European Paper Week, 17th-19t...
 BIOPOLYMERS HAVE BEEN WIDELY STUDIED IN
RECENT YEARS
 COMMONLY USED BIOPOLYMERS: STARCH,
PECTIN, CHITIN, CHITOSAN, XYLA...
CHITOSAN AND RICE STARCH COATING
Improved:
 PHYSICAL PROPERTIES
 Tensile properties
 Rougness
 Mass per area
 Moistur...
WHY UV radiation/treatment?
- Increases bonding
- quicker drying
- Improves scratches, surface
EFPRO-CEPI European Paper W...
RESEARCH
FOCUS
RESEARCH FOCUS
 Chitosan and rice starch coating
(two different ratios 2:1 and 1:1)
 UV treatment (drying...
FUNCTIONALISATION OF PAPER
SURFACE WITH CHITOSAN+RICE STARCH
COATING USING UV
 Potential target applications:
 Packaging...
EFPRO-CEPI European Paper Week, 17th-19th November 2015
EFPRO-CEPI European Paper Week, 17th-19th November 2015
EFPRO-CEPI European Paper Week, 17th-19th November 2015
EFPRO-CEPI European Paper Week, 17th-19th November 2015
EFPRO-CEPI European Paper Week, 17th-19th November 2015
EFPRO-CEPI European Paper Week, 17th-19th November 2015
EFPRO-CEPI European Paper Week, 17th-19th November 2015
Uncoated paper
EFPRO-CEPI European Paper Week, 17th-19th November 2015
Coated paper and dryed in a
standard drier (1:1)
Co...
EFPRO-CEPI European Paper Week, 17th-19th November 2015
Coated paper and dryed in UV
drier (1:1)
Uncoated paper
Coated pap...
 The tensile strength and elongation at break
increased on coated paper compared to uncoated.
 Optical properties of coa...
 The results showed the changes of UV treated paper in
the FTIR spectra as expected.
 Paper coated with ratio 2:1 of chi...
THANK YOU FOR YOUR
ATTENTION!
Faculty of Natural Sciences and Engineering
Department of Textiles, Graphic Arts and Design
...
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Effect of UV-treatment on properties of coated paper with biopolymers

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By Urska Vrabic Brodnjak, University of Ljubljana. This was presented during the New Ideas for the Paper Industry: Young Researchers' Presentations session, organised as part of European Paper Week 2015. More at http://www.cepi.org/epw

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Effect of UV-treatment on properties of coated paper with biopolymers

  1. 1. EFFECT OF UV-TREATMENT ON PROPERTIES OF COATED PAPER WITH BIOPOLYMERS Urška Vrabič Brodnjak, PhD University of Ljubljana, Faculty of Natural Sciences and Engineering, Ljubljana, Slovenia urska.vrabic@ntf.uni-lj.si EFPRO-CEPI European Paper Week, 17th-19th November 2015
  2. 2. Why biopolymers? Coatings with biopolymers  Research focus  Results  Summary EFPRO-CEPI European Paper Week, 17th-19th November 2015
  3. 3.  BIOPOLYMERS HAVE BEEN WIDELY STUDIED IN RECENT YEARS  COMMONLY USED BIOPOLYMERS: STARCH, PECTIN, CHITIN, CHITOSAN, XYLAN, LIGNIN  ENVIROMENTAL CONCERNS-LOW ENVIRONMENTAL FOOTPRINT  RECYCLABILITY OF PACKAGING MATERIALS  GREAT BARRIER COATINGS ON PAPER, BOARD ETC. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  4. 4. CHITOSAN AND RICE STARCH COATING Improved:  PHYSICAL PROPERTIES  Tensile properties  Rougness  Mass per area  Moisture…  BARRIER PROPERTIES: gas, grease, moisture, …  OPTICAL PROPERTIES  Colour  Gloss  Opacity… • Physical Properties • Barrier Properties • Optical Properties EFPRO-CEPI European Paper Week, 17th-19th November 2015
  5. 5. WHY UV radiation/treatment? - Increases bonding - quicker drying - Improves scratches, surface EFPRO-CEPI European Paper Week, 17th-19th November 2015
  6. 6. RESEARCH FOCUS RESEARCH FOCUS  Chitosan and rice starch coating (two different ratios 2:1 and 1:1)  UV treatment (drying paper)  Improved mechanical, optical, barrier properties  Improved surface properties with the most suitable ratio of the coating EFPRO-CEPI European Paper Week, 17th-19th November 2015
  7. 7. FUNCTIONALISATION OF PAPER SURFACE WITH CHITOSAN+RICE STARCH COATING USING UV  Potential target applications:  Packaging materials for fruits, vegetables, baker‘s wares  Barrier properties which are very important for biobased food packaging materials EFPRO-CEPI European Paper Week, 17th-19th November 2015
  8. 8. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  9. 9. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  10. 10. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  11. 11. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  12. 12. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  13. 13. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  14. 14. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  15. 15. Uncoated paper EFPRO-CEPI European Paper Week, 17th-19th November 2015 Coated paper and dryed in a standard drier (1:1) Coated paper and dryed in a standard drier (2:1)
  16. 16. EFPRO-CEPI European Paper Week, 17th-19th November 2015 Coated paper and dryed in UV drier (1:1) Uncoated paper Coated paper and dryed in UV drier (2:1)
  17. 17.  The tensile strength and elongation at break increased on coated paper compared to uncoated.  Optical properties of coated paper increased due to smoother surface of the paper.  Coated paper dried in a conventional drier has lower tensile strength, elongation and break and water vapour permeability due to coated paper treated with UV drier.  Observations using scanning electron microscope have proven that mixture of chitosan and rice starch penetrated into the paper and still exhibited good water absorptivness and tensile properties. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  18. 18.  The results showed the changes of UV treated paper in the FTIR spectra as expected.  Paper coated with ratio 2:1 of chitosan and rice starch showed increase in yellowing compared to coating with ratio 1:1.  The research has proven increased physical and optical properties on coated, UV treated paper.  To be continued…. EFPRO-CEPI European Paper Week, 17th-19th November 2015
  19. 19. THANK YOU FOR YOUR ATTENTION! Faculty of Natural Sciences and Engineering Department of Textiles, Graphic Arts and Design Snežniška 5, SI-1000 Ljubljana Slovenia E-mail: urska.vrabic@ntf.uni-lj.si

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