Utilization of Three Bark Extractives as Natural Photostabilizers for the Photostabilization of Wood Flour/Polypropylene Composites

다국어 초록 (Multilingual Abstract)

Three kinds of tree bark extractives from trembling aspen (Populus tremuloides) (AE), lodgepole pine (Pinuscontorta) (LE), and western red cedar (Thuja plicata) (RE) were produced and used as antioxidants. The antioxidationactivities of those extractives were evaluated and compared with commercial antioxidant butylated hydroxytoluene (BHT).
The obtained extractives were applied as natural photostabilizers to produce wood flour/polypropylene (WF/PP) compositesat an addition level of 2 wt%. The composites were subjected to QUV accelerated weathering tester for a total of 1200 h. Thechanges in surface color, surface morphology, and surface chemistry of composites were investigated during the exposure.
The results showed that all bark extractives alleviated the photodegradation of composites successfully. Among them, REwas proved to be the most effective. It exhibited excellent UV absorption and similar free-radical inhibition ability comparedwith BHT. Consequently, composites containing RE exhibited less discoloration, less severe surface cracking, and lesschanges in surface chemistry during the whole weathering process. Overall, these results revealed that RE had great potentialas a natural photostabilizer in polymer systems.

참고문헌 (Reference)

1 A. Ashori, 99 : 4661-, 2008

2 V. Bondet, 30 : 609-, 1997

3 J. Chen, 38 : 2140-, 2017

4 J. M. Park, 39 : 1042-, 2008

5 T. Ratanawilai, 15 : 2160-, 2014

6 W. Wang, 9 : 615-, 2017

7 M. Kargar, 37 : 1674-, 2016

8 N. M. Stark, 92 : 1883-, 2007

9 J. S. Fabiyi, 41 : 1434-, 2010

10 C. Homkhiew, 56 : 52-, 2014

11 I. Yakimets, 86 : 59-, 2004

12 Y. Amintowlieh, 104 : 1-, 2014

13 U. Müller, 69 : 97-, 2003

14 L. M. Matuana, 96 : 97-, 2011

15 K. K. Pandey, 93 : 2138-, 2008

16 P. Nzokou, 31 : 425-, 2006

17 T. C. Chang, 95 : 1518-, 2010

18 T. C. Chang, 105 : 42-, 2014

19 T. C. Chang, 49 : 811-, 2015

20 T. C. Chang, 51 : 1133-, 2017

21 P. N. Diouf, 43 : 457-, 2009

22 P. N. Diouf, 113 : 897-, 2009

23 Z. Huang, 46 : 167-, 2014

24 M. Yalcin, 133 : 334-, 2017

25 E. D. Tomak, 151 : 152-, 2018

26 E. Aspé, 34 : 838-, 2011

27 S. Zhang, 77 : 451-, 2015

28 K. R. Aadil, 67 : 220-, 2014

29 N. M. Stark, 91 : 3048-, 2006

30 C. Badji, 137 : 162-, 2017

31 Y. Chen, 9 : 610-, 2016

32 D. Rasouli, 133 : 85-, 2016

33 B. K. Deka, 42 : 2117-, 2011

34 S. Butylina, 120 : 10-, 2015

35 S. Butylina, 43 : 2087-, 2012

36 C. M. Popescu, 48 : 667-, 2011

37 R. Gadioli, 108 : 23-, 2014

38 K. Zheng, 112 : 27-, 2015

39 A. A. Morandim-Giannetti, 87 : 2563-, 2012

40 W. A. N. N. A. Ammawath, 83 : 187-, 2006

41 P. C. Babu, 79 : 562-, 2011

42 J. M. Park, 66 : 2686-, 2006