Insight into glass transition of cellulose based on direct thermal processing after plasticization by ionic liquid

Wu, Jun; Bai, Juan; Xue, Zhigang; Liao, Yonggui; Zhou, Xiang; Xie, Xiaolin

doi:10.1007/s10570-014-0502-1

Cited by 34 publications

(17 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, stretching vibration of CO bond of the Amide I band falls between 1700 and 1600 cm −1 while the CO stretching from MCC also appeared to be within the range of Amide I at 1646 cm −1 as reported by Zhang et al . Distinct bands of individual MCC and CFF at 1642 and 1627 cm −1 , respectively, as represented by PLA composites were rather weak relatively to that neat PLA.…”

Section: Resultssupporting

confidence: 64%

“…claimed that this is due to plasticizing effect of BMIMCl to increase film flexibility. Decrease in the T g of the composites is an indication that BMIMCl is a good solvent to disaggregate and disentangle the polymer chains under heating and shearing, thus enhancing the chain mobility and polymer processibility …”

Section: Resultsmentioning

confidence: 99%

“…Likewise, Lu et al . specified two PLA diffraction peaks at 2θ = 16.4 and 22.6°, respectively. High temperature processing that led to molecule deformation could be the reason for the low crystallinity apart from the rapid cooling that prevent the PLA chains to organize into crystalline lamella with shortened duration …”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Poly(lactic acid) composite films reinforced with microcrystalline cellulose and keratin from chicken feather fiber in 1‐butyl‐3‐methylimidazolium chloride

Khaw

Chee

Gan

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

Amphiphilic keratin from chicken feather fiber (CFF) and hydrophilic cellulose were incorporated as fillers into hydrophobic poly(lactic acid) (PLA) polymer blend. This study implemented ionic liquid (IL) of 1-butyl-3-methylimidazolium chloride (BMIMCl) to dissolve the 1 wt % fillers. The composite films were compared with and without the addition of IL prepared from five sets of ratios of CFF to MCC using measuring mixers and compression molding. Thermal analysis showed that increase in CFF composition decreases the glass-transition temperature (T g ), and crystallization temperature (T c ) as well as increases the degree of crystallinity. PLA composite with the 70/30 ratio of CFF to MCC was found to be the optimum composition in obtaining considerably low T g and high crystallinity. BMIMCl enhanced the miscibility of the composites as observed in scanning electron microscope images and single T g . Apart from creating porous structure and lowering mechanical hardness, BMIMCl also decreased the thermal stability of the PLA composites.

show abstract

Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Poly(lactic acid) composite films reinforced with microcrystalline cellulose and keratin from chicken feather fiber in 1‐butyl‐3‐methylimidazolium chloride

Khaw

Chee

Gan

et al. 2019

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…As a kind of reinforcement material, nanocellulose (CNC) has excellent axial elastic modulus . Also, CNC has a high aspect ratio, low density, and a reactive surface with multiple hydroxy groups, which facilitate the grafting of chemical species to achieve different surface properties through modification processes, such as silylation and amination .…”

Section: Introductionmentioning

confidence: 99%

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

Zhao

Wei

et al. 2019

J. Polym. Sci. Part A: Polym. Chem.

View full text Add to dashboard Cite

Study on proton exchange membrane (PEM) with the aim toward excellent battery performance of PEM for fuel cells has attracted increasing attention. In this work, nanocellulose (CNC) aminated by KH792 noted as NN was prepared. CNC or NN/sulfophenylated poly(ether ether ketone ketone) (sPEEKK) nanocomposite membrane (SN) or (SNN) were produced by solution mixing. SNN was further coated with tetraethyl orthosilicate (TEOS) to obtain SNNT. The properties of sPEEKK, SN, SNN, and SNNT membranes were thoroughly investigated. The proton conductivity of SN4 was 0.22 S·cm−1 at 90 °C, while a proton conductivity of 0.30 S·cm−1 was obtained for SNN4, and an even higher value of 0.36 S·cm−1 at 90 °C was obtained for the TEOS‐coated SNN4 (SNN4T). Meanwhile, SNN4T showed high thermal stability, and its Td5 was as high as 318.2 °C. Furthermore, the composite membrane coated with TEOS also presented excellent oxidative stability. The mass of SNN2T after treated in Fenton agent for 1 h at 80 °C was still retained 96.2%, and it was not fully dissolved until 11 h. It was illustrated that aminated CNC/sPEEKK nanocomposite membranes coated with TEOS is a kind of promising materials as PEMs for fuel cells. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2190–2200

show abstract

“…In another study, [Bmim]Cl as an IL plasticiser has been investigated in cellulose processing (Wu et al, 2015). It was found that the tensile strength and Young's modulus of ionic liquid plasticized cellulose decreased with increasing IL content.…”

Section: Ionic Liquids As Plasticisersmentioning

confidence: 99%

Highly functional green materials platform: Starch-ionic liquid-carbon nanotube polymer melt nanocomposites

Liu¹

View full text Add to dashboard Cite

Starch is a promising biodegradable polymer material which has attracted attention recently. A renewable and biodegradable resource can potentially address the shortage of conventional petroleum-based polymers and help solve the problem of environmental pollution from the use of these polymers. To use starch in polymer processing, gelatinisation, which is the process to disrupt the native starch structure, must happen to turn the starch in to an amorphous thermoplastic starch (TPS). However, water, the conventional gelatinisation agent and plasticiser, is extremely volatile and will evaporate during thermal processing. This leads to high melt viscosities, processing difficulties and hence poor product quality. In addition the mechanical properties of the resulting TPS products are not as high as that of the currently used petroleum-based polymers that they seek to replace.Therefore, potential solutions for TPS processing and application development is to use other plasticisers to aid processing and/or to reinforce TPS with nano-particles. One of the key tasks of this project was to understand the plasticizing effects of ionic liquids (ILs) in TPS processing and interpreting these in terms of the molecular interactions between the components. In addition the role of adding nano-particles, in the form of carbon nanotubes, in an attempt to strengthen TPS was investigated. The ultimate aim was to provide design guidelines to produce high value added biodegradable nanocomposites.Three types of ionic liquids (ILs) were considered: 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]), 1-allyl-3-methylimidazolium chloride ([Amim]Cl) and 1-butyl-3-methylimidazolium chloride ([Bmim]Cl). They were processed in batches of 150g by thermal mixing. Their behaviours were compared to glycerol as plasticisers of TPS, and their effects on TPS processing, water uptake during conditioning, mechanical properties, thermal stabilities, crystallisation behaviour and molecular interaction were studied. Both spectroscopic and X-ray analysis techniques were used to investigate the interactions that occurred, and these were related to the material characteristics. Then, multi-walled carbon nanotubes (MWCNTs) were introduced to the TPS matrix to investigate their behaviour as a strengthening agent and also to potentially create a functional material with useful electrical properties.The results demonstrated that the ILs were effective plasticisers for TPS. However, whilst their use improved the flexibility of TPS, mechanical strength and thermal stability were decreased.The molecular interactions between TPS and ILs were found to differ between TPS and glycerol. This led to differences in the crystalline structures formed, 2% to 4% more water Page | iii uptake during conditioning and hence up to a 90% decrease in Young's modulus. In particular the effect of water uptake during conditioning was identified as the key contributor to the ultimate mechanical properties. The IL plasticised TPS were also found to be less thermally stable.In or...

show abstract

Insight into glass transition of cellulose based on direct thermal processing after plasticization by ionic liquid

Cited by 34 publications

References 44 publications

Poly(lactic acid) composite films reinforced with microcrystalline cellulose and keratin from chicken feather fiber in 1‐butyl‐3‐methylimidazolium chloride

Poly(lactic acid) composite films reinforced with microcrystalline cellulose and keratin from chicken feather fiber in 1‐butyl‐3‐methylimidazolium chloride

Property improvement of nanocellulose‐reinforced proton exchange nanocomposite membrane coated with tetraethyl orthosilicate

Highly functional green materials platform: Starch-ionic liquid-carbon nanotube polymer melt nanocomposites

Contact Info

Product

Resources

About