PMID- 30966648
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231006
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 10
IP  - 6
DP  - 2018 Jun 4
TI  - Preparation and Characterization of Regenerated Cellulose Film from a Solution in 
      Lithium Bromide Molten Salt Hydrate.
LID - 10.3390/polym10060614 [doi]
LID - 614
AB  - In this study, the molten salt hydrate of lithium bromide (LiBr) was utilized as 
      a non-derivatizing cellulose dissolution solvent to prepare regenerated cellulose 
      films for kraft pulp. The effects of LiBr concentrations (60, 62, and 65 wt %) 
      and dissolving time (from 5 to 40 min with the interval of 5 min) on the 
      structures and the properties of the films were investigated. Fourier transform 
      infrared (FT-IR) and cross-polarization magic-angle spinning carbon-13 nuclear 
      magnetic resonance (CP/MAS (13)C NMR) characterizations verified the breakage of 
      inter- and intra-cellulose hydrogen bonds during the regeneration, resulting in 
      the disruption of the crystalline structure of cellulose. X-ray diffraction (XRD) 
      data indicated that the regeneration converted the polymorphism of cellulose from 
      I to II as well as decreased its crystallinity. Ultraviolet-visible spectra 
      (UV-Vis) and scanning electron microscopy (SEM) analyses revealed the excellent 
      optical transparency of the films to visible light due to the complete 
      dissolution of cellulose fibers as well as the sufficient breaking of the inter- 
      and intra-cellulose hydrogen bonds. In terms of tensile testing, tuning LiBr 
      concentrations and dissolving time could increase the elongation at break and 
      tensile strength of the films. The maximum elongation at break of 26% and tensile 
      strength of 67 MPa were achieved when the films prepared in 65 wt % LiBr for 10 
      and 15 min, respectively. These results indicated the great potential of the 
      cellulose films for packaging use.
FAU - Zhang, Xueqin
AU  - Zhang X
AD  - College of Light Industry and Food, Zhongkai University of Agriculture and 
      Engineering, Guangzhou 510225, China. xueqin0228@gmail.com.
AD  - State Key Laboratory of Pulp and Paper Engineering, South China University of 
      Technology, Guangzhou 510640, China. xueqin0228@gmail.com.
AD  - Department of Biological System Engineering, University of Wisconsin-Madison, 460 
      Henry Mall, Madison, WI 53706, USA. xueqin0228@gmail.com.
FAU - Xiao, Naiyu
AU  - Xiao N
AD  - College of Light Industry and Food, Zhongkai University of Agriculture and 
      Engineering, Guangzhou 510225, China. xiaony81@163.com.
FAU - Wang, Huihui
AU  - Wang H
AD  - State Key Laboratory of Pulp and Paper Engineering, South China University of 
      Technology, Guangzhou 510640, China. wang.huihui@mail.scut.edu.cn.
FAU - Liu, Chuanfu
AU  - Liu C
AUID- ORCID: 0000-0002-3151-7956
AD  - State Key Laboratory of Pulp and Paper Engineering, South China University of 
      Technology, Guangzhou 510640, China. chfliu@scut.edu.cn.
FAU - Pan, Xuejun
AU  - Pan X
AD  - Department of Biological System Engineering, University of Wisconsin-Madison, 460 
      Henry Mall, Madison, WI 53706, USA. xpan@wisc.edu.
LA  - eng
GR  - CBET1159561/National Science Foundation grant/
PT  - Journal Article
DEP - 20180604
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC6404140
OTO - NOTNLM
OT  - inorganic ionic liquid
OT  - kraft pulp
OT  - non-derivatizing dissolution
OT  - packaging film
COIS- The authors declare no conflict of interest.
EDAT- 2019/04/11 06:00
MHDA- 2019/04/11 06:01
PMCR- 2018/06/04
CRDT- 2019/04/11 06:00
PHST- 2018/04/27 00:00 [received]
PHST- 2018/06/01 00:00 [revised]
PHST- 2018/06/01 00:00 [accepted]
PHST- 2019/04/11 06:00 [entrez]
PHST- 2019/04/11 06:00 [pubmed]
PHST- 2019/04/11 06:01 [medline]
PHST- 2018/06/04 00:00 [pmc-release]
AID - polym10060614 [pii]
AID - polymers-10-00614 [pii]
AID - 10.3390/polym10060614 [doi]
PST - epublish
SO  - Polymers (Basel). 2018 Jun 4;10(6):614. doi: 10.3390/polym10060614.