PMID- 32456096
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240328
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 12
IP  - 5
DP  - 2020 May 22
TI  - Transparent Ultraviolet (UV)-Shielding Films Made from Waste Hemp Hurd and 
      Polyvinyl Alcohol (PVA).
LID - 10.3390/polym12051190 [doi]
LID - 1190
AB  - This work proposes a new approach to fabricate highly transparent and flexible 
      composite films that exhibit enhanced UV-shielding properties. Lignin has innate 
      UV-shielding properties. However, when purified lignin, which is conventionally 
      extracted through chemical treatment, is mixed with polymeric materials, its 
      presence negatively influences the transparency of the resulting composite. High 
      transparency and UV-shielding are desirable properties for many applications. In 
      this study, composites were made by mixing lignocellulose particles and polyvinyl 
      alcohol (PVA), where lignocellulose particles were obtained from ball-milled 
      waste hemp hurd without chemical treatments. The UV-shielding properties of the 
      resulting composite film, as a function of hemp/PVA weight ratios, were 
      investigated. The intermolecular interactions between the hemp particles and the 
      PVA were characterized using infrared spectroscopy with the presence of -C=O 
      group at 1655 cm(-1), providing evidence that the chemical structure of lignin 
      was preserved. The fabricated hemp/PVA films exhibit stronger UV-shielding, in 
      the UVA-I range (340-400 nm) than TiO(2)/PVA films. The composite films also 
      showed comparable water vapor permeability (WVP) with commercial packaging 
      plastic film made of HDPE (high-density polyethylene). The optimization 
      experiments were reported, with aim at understanding the balance between the 
      UV-shielding and mechanical properties of the hemp/PVA films. The findings of 
      this work can be applicable to the packaging, food and cosmetic industries where 
      UV shielding is of utmost importance, hence adding value to hemp hurd waste.
FAU - Zhang, Yi
AU  - Zhang Y
AUID- ORCID: 0000-0002-6359-6521
AD  - Deakin University, Institute for Frontier Materials, 75 Pigdons Road, Geelong, VI 
      3216, Australia.
FAU - Remadevi, Rechana
AU  - Remadevi R
AD  - Deakin University, Institute for Frontier Materials, 75 Pigdons Road, Geelong, VI 
      3216, Australia.
FAU - Hinestroza, Juan P
AU  - Hinestroza JP
AUID- ORCID: 0000-0002-8534-1407
AD  - Cornell University, Fiber Science and Apparel Design, Ithaca, NY 14853, USA.
FAU - Wang, Xungai
AU  - Wang X
AD  - Deakin University, Institute for Frontier Materials, 75 Pigdons Road, Geelong, VI 
      3216, Australia.
FAU - Naebe, Maryam
AU  - Naebe M
AUID- ORCID: 0000-0002-5266-9246
AD  - Deakin University, Institute for Frontier Materials, 75 Pigdons Road, Geelong, VI 
      3216, Australia.
LA  - eng
GR  - DURPS/Deakin University/
PT  - Journal Article
DEP - 20200522
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC7284461
OTO - NOTNLM
OT  - PVA
OT  - UV-shielding
OT  - ball milling
OT  - hemp hurd waste
OT  - lignin
OT  - lignocellulosic particles
OT  - mechanical property
OT  - plastic film
COIS- The authors declare no conflict of interest.
EDAT- 2020/05/28 06:00
MHDA- 2020/05/28 06:01
PMCR- 2020/05/22
CRDT- 2020/05/28 06:00
PHST- 2020/04/24 00:00 [received]
PHST- 2020/05/18 00:00 [revised]
PHST- 2020/05/20 00:00 [accepted]
PHST- 2020/05/28 06:00 [entrez]
PHST- 2020/05/28 06:00 [pubmed]
PHST- 2020/05/28 06:01 [medline]
PHST- 2020/05/22 00:00 [pmc-release]
AID - polym12051190 [pii]
AID - polymers-12-01190 [pii]
AID - 10.3390/polym12051190 [doi]
PST - epublish
SO  - Polymers (Basel). 2020 May 22;12(5):1190. doi: 10.3390/polym12051190.