Effect of two kinds of lignins, alkaline lignin and sodium lignosulfonate, on the foamability of thermoplastic zein-based bionanocomposites

Oliviero, Maria; Verdolotti, Letizia; Nedi, Irma; Docimo, Fabio; Maio, Ernesto Di; Iannace, Salvatore

doi:10.1177/0021955x12460043

Cited by 14 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two peaks at 2θ = 9.5 and 20° positions were related to two d -spacings around 4.6 Å ( d 0 ) and 8.96 Å ( d i ). Olivero et al 23 suggested that these two peaks are attributed to the average backbone distance within α-helix structure of the protein and d -spacing of α-interhelix packing, respectively, and they observed these two peaks in thermoplastic zein foam nanocomposite modified with 10 g/100 g AL and LSS. Compared with the control film, the lower intensity of modified films with lignin showed the hierarchical changes in SPI matrix due to the addition of lignin.…”

Section: Resultsmentioning

confidence: 99%

“…This reduction may be attributed to the disruption of α-interhelix packing. 23 The XRD spectra were well-matched to the FTIR spectra, indicating that the addition of lignin interrupted the secondary structure of the protein matrix according to the reduced intensity. The consistency in the general pattern implies that there is a high compatibility between lignin and enzymatically modified SPI matrix.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Utilization of Lignin in Biopolymeric Packaging Films

2018

View full text Add to dashboard Cite

Lignin is a byproduct of agricultural industries and only has limited applications. In this study, lignin was investigated for use in sustainable biopolymeric packaging film. Alkali lignin (AL) and lignosulfonate (LSS) were added to enzymatically modified soy protein isolate (SPI) biopolymeric film with different concentrations with the goal of improvement of film physical and functional properties. A radical scavenging activity test revealed that films containing LSS had values 28 and 6% higher than control and AL-based films, respectively; AL itself (not in films) had significantly higher radical scavenging activity than LSS. This indicates the activity of lignin is affected by interaction with SPI. The higher compatibility between LSS and enzymatically modified SPI resulted in a positive effect on surface smoothness, water absorption, and mechanical properties of LSS-based films. Films containing AL showed a high light absorption range in the UV region, and this UV-blocking ability increased with increasing level of lignin. Deconvoluted Fourier transform infrared spectra confirmed that the addition of lignin resulted in some changes in the secondary structure of the protein matrix, which were aligned with X-ray diffraction results. The addition of lignin improved tensile strength (TS) and thermal stability of films compared to the lignin-free control. This improvement in TS and thermal stability was probably a result of new intermolecular interactions between lignin and SPI. Water vapor permeability of the films containing lignin decreased to 50% of the control because lignin played a role as a filler in the matrix. On the basis of our observations, the incorporation of lignin into biopolymeric film is capable of providing additional benefits and solutions to various industries, such as food, packaging, agriculture, and pharmaceuticals.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Utilization of Lignin in Biopolymeric Packaging Films

2018

View full text Add to dashboard Cite

show abstract

“…This represents a challenge to combine them with anionic molecules, which in turn are the most abundant between functional materials (i.e. 110,111 It is generally obtained as a by-product in the paper industry through separation from cellulose fibers. 103,104 The LDH structure is similar to that of brucite mineral, a magnesium hydroxide easy to find in nature.…”

Section: Nano-fillersmentioning

confidence: 99%

“…Lignin is another bio-based filler and represents together with starch, cellulose and hemicellulose, the most abundant renewable material on the earth. 110,111 It is generally obtained as a by-product in the paper industry through separation from cellulose fibers. Its morphology depends on the kind of process used for delignification.…”

Section: Nano-fillersmentioning

confidence: 99%

Mechanical milling as a technology to produce structural and functional bio-nanocomposites

2015

View full text Add to dashboard Cite

Solid state mixing", such as mechanical milling (MM), represents an ecological and economical alternative to achieve homogeneous dispersion of nano-fillers into biodegradable polymers. The advantage of working at low temperatures, without a solvent and with almost any type of polymer matrix, opens new and unexplored routes for the preparation of advanced functional materials. The use of mechanical milling contains within itself several advantages, including a strong reduction of environmental disposal, the control of the degradation processes associated with high temperature, the compatibilization of immiscible blends and the treatment of waste disposal and recycled materials. The simultaneous formation and dispersion of nanoparticles, the promotion of mechano-chemical reactions and the proper manipulation of thermo-sensitive active molecules such as antimicrobials, oxygen scavengers and antibiotics are other advantages of this process. The aim of the current work is to review the recent literature on the use of MM as a green technique to produce bio-nanocomposites. It is demonstrated how this technology could be considered an interesting option for the fabrication of novel nanostructured materials from environmental friendly resources. † Electronic supplementary information (ESI) available. See

show abstract

“…Previously, we have introduced thermoplasticized zein by melt mixing, and probed the role of both the molecular architecture of the protein and the nature of plasticizers on the chemo‐physical properties and the ability to withstand extreme elongational deformation during film processing . More recently, zein‐based nanocomposites with lignin derivatives have been developed and the interactions among the protein, the plasticizers, and the lignin derivatives analyzed to explain the protein structural changes and conformational modifications brought about by the lignin derivatives . Such modifications resulted in the improvement of mechanical, water sorption, and flame‐retardant properties paving the way to further exploitation of the materials in the emerging field of the biodegradable electronics.…”

Section: Introductionmentioning

confidence: 99%

Dielectric Properties of Sustainable Nanocomposites Based on Zein Protein and Lignin for Biodegradable Insulators

Oliviero

Rizvi

Verdolotti

et al. 2017

Adv Funct Materials

Self Cite

View full text Add to dashboard Cite

Two types of lignin, alkali lignin and lignosulfonic acid sodium salt, are blended into thermoplastic zein through melt mixing in order to develop biodegradable insulator materials for multifunctional applications in electronics. The effects of lignin type and content on the dielectric properties of the resulting bio-nanocomposites are investigated. The results indicate that, by modifying the structural arrangement of the zein with the use of lignin, it is possible to obtain bio-nanocomposites characterized by tunable dielectric properties. The bio-nanocomposites containing low amounts of lignin derivatives exhibit extensive protein structural changes together with a modification of the dielectric properties compared to the pristine thermoplastic zein. Changes in the dielectric properties of these systems are also observed to change over time, indicating a loss of plasticizer, as is evident by a decrease in the glass-transition temperature. At high frequencies, the resulting values of the dielectric permittivity and of the loss tangent demonstrate that the bio-nanocomposite can be used as biodegradable dielectric material for transient (temporary) electronics

show abstract

Effect of two kinds of lignins, alkaline lignin and sodium lignosulfonate, on the foamability of thermoplastic zein-based bionanocomposites

Cited by 14 publications

References 24 publications

Utilization of Lignin in Biopolymeric Packaging Films

Utilization of Lignin in Biopolymeric Packaging Films

Mechanical milling as a technology to produce structural and functional bio-nanocomposites

Dielectric Properties of Sustainable Nanocomposites Based on Zein Protein and Lignin for Biodegradable Insulators

Contact Info

Product

Resources

About