Effect of Coagulation Bath Temperature on Mechanical, Morphological, and Thermal Properties of Cellulose/Antarctic Krill Protein Composite Fibers

Guo, Jing; Zhao, Miao; Gong, Yumei; Qiao, Boyang

doi:10.1021/acs.langmuir.0c01148

Cited by 11 publications

(6 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The average breaking strength of pure guar fibers was 1.47 cN/dtex while that of MC-GG fibers cross-linked by ECH and complexed by Ca 2+ can reach 2.4 cN/dtex when the mass fraction of ECH was 12%, which means an increase of 63.3%. To show our work more clearly, we have compared the mechanical properties of several biomacromolecule fibers in recent years (from left to right: cellulose, chitosan, SA, and GG) in the embedded graph in Figure a. It is also clear that the mechanical properties of GG fibers are still superior.…”

Section: Resultsmentioning

confidence: 89%

“…For natural polysaccharides, wet spinning is one of the most effective methods for the mass production of natural polysaccharide fibers. Fiber types and their corresponding process methods and application development are abundant and mature, for example, sodium alginate (SA), cellulose, , chitosan, carrageenan wet fibers, and so forth. The basic principle of wet spinning is that the spinning stock is squeezed into the coagulation bath through the spouting holes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Humidity-Responsive Guar Gum Fibers by Wet Spinning

et al. 2022

Self Cite

View full text Add to dashboard Cite

In this study, guar gum fibers were obtained by wet spinning, in which epichlorohydrin (ECH) and calcium chloride (CaCl 2 ) were used as the cross-linking agent and metal complexing agent, respectively. The fibers' chemical structure, morphology, crystallinity, and thermal and mechanical properties were analyzed by Fourier infrared spectroscopy, scanning electron microscopy, and so forth. The results showed that ECH reacted with guar gum and formed ether bonds. Meanwhile, ECH can effectively increase the number of cross-linking points and improve the mechanical properties of the fibers. When the ECH content was 12% (w/w), the breaking strength could reach 2.4 cN/dtex. The conductivity of MC-GG fibers varied with the relative humidity and could reach 2.845 × 10 −2 S/cm at maximum. Meanwhile, the contact angle of MC-GG fibers was 33°, indicating that the fibers had good hydrophilicity and humidity response ability and had excellent potential in the field of smart fabrics.

show abstract

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Humidity-Responsive Guar Gum Fibers by Wet Spinning

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…When the composite fiber is extruded into the coagulation bath by spinneret, SA, AKP and CNCs components on the surface of the composite fiber react with Ca 2+ rapidly, since Ca 2+ is 2-valent, there are various cases of Ca 2+ cross-linking with SA, AKP, and CNCs, simultaneously or to SA, AKP and CNCs alone, in addition, due to polyelectrolyte effect, SA, AKP, and CNCs also have electrostatic adsorption, the above conditions act simultaneously to form ionic crosslinking structures, as shown in Figure 9 e. However, the fiber core layer was still in an incomplete cross-linking state because Ca 2+ was not wholly entered. When Ca 2+ in the coagulation bath entered the fiber, the water inside the fiber also penetrated the surface and entered the coagulation bath; at this time, because of double diffusion inside and outside the fiber, negative pressure is generated inside the fiber, so the surface of composite fiber shrinks and gully structure is formed [ 24 ].…”

Section: Resultsmentioning

confidence: 99%

“…However, the fiber core layer was still in an incomplete cross-linking state because Ca 2+ was not wholly entered. When Ca 2+ in the coagulation bath entered the fiber, the water inside the fiber also penetrated the surface and entered the coagulation bath; at this time, because of double diffusion inside and outside the fiber, negative pressure is generated inside the fiber, so the surface of composite fiber shrinks and gully structure is formed [24].…”

Section: Scanning Electron Microscopy Analysis Of Sa/akp/cncs Composi...mentioning

confidence: 99%

Characteristics of Sodium Alginate/Antarctic Krill Protein Composite Fiber Based on Cellulose Nanocrystals Modification: Rheology, Hydrogen Bond, Crystallization, Strength, and Water-Resistance

Shan

Guo

Guan

et al. 2022

Gels

Self Cite

View full text Add to dashboard Cite

The purpose of adding cellulose nanocrystals (CNCs) into sodium alginate (SA) and Antarctic krill protein (AKP) system is to use the ionic cross-linking of SA and AKP and the dynamic hydrogen-bonding between them and CNCs to construct multiple cross-linking structures, to improve the water-resistance and strength of SA/AKP/CNCs composite fiber. Based on the structural viscosity index in rheological theory, the ratio of spinning solution and temperature were optimized by studying the structural viscosity index of the solution under different CNCs content and temperature, then the composite fiber was prepared by wet spinning. We found that when the content of CNCs is 0.8% and 1.2%, the temperature is 45 °C and 55 °C, the structural viscosity is relatively low. Under the optimal conditions, the intermolecular hydrogen bonds decrease with the increase of temperature. Some of the reduced hydrogen bonds convert into intramolecular hydrogen bonds. Some of them exist as free hydroxyl; increasing CNCs content increases intermolecular hydrogen bonds. With the increase of temperature, the crystallinity of composite fiber increases. The maximum crystallinity reaches 27%; the CNCs content increases from 0.8% to 1.2%, the breaking strength of composite fiber increases by 31%. The water resistance of composite fiber improves obviously, while the swelling rate is only 14%.

show abstract

“…Therefore, there is great potential for the development of global Antarctic krill resources [2]. Antarctic krill is usually utilized by being processed into bait used in aquaculture industries [3]. However, due to the limited scale of aquaculture and the variety of bait resources, expanding the utilization ways of Antarctic krill resources is becoming increasingly important.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Antarctic Krill Oil Emulsion and Its Stability under Catalase Treatment

Zheng

Zhu

Dai

2021

Foods

View full text Add to dashboard Cite

Making Antarctic krill oil into emulsion is a good way to utilize Antarctic krill, but proliferation of microorganisms cannot be ignored. H2O2 is widely used in the sterilization of liquid food since its decomposition products are environmentally friendly, although residual H2O2 should be removed for food safety. Adding catalase (CAT) is an effective means to do this. However, the enzyme activity center of CAT is the iron porphyrin group, which has the risk of accelerating lipid oxidation in the oil emulsion. Therefore, we hypothesized that CAT might not be suitable for the removal of H2O2 in Antarctic krill oil emulsion. In this paper, Antarctic krill oil emulsion was prepared, and then the effect of CAT on the emulsion was studied through visual observation, microscopic morphology observation, turbidity and stability, particle size, and ζ-potential; finally, the mechanism of CAT destroying the emulsion was explored from the perspective of lipid oxidation. The results showed that a stable Antarctic krill emulsion was prepared using Tween-80 as the emulsifier, with the oil concentration of 1% (v/v) and the ratio of surfactant to oil phase of 1:5 (v/v). The emulsion treated with CAT had undergone demulsification, stratification, and coagulation after 2 days of incubation, while the emulsion treated with superoxide dismutase (SOD) and bovine serum albumin (BSA) changed little. In addition, the thiobarbituric acid reactive substances (TBARS) value and the content of hydroxyl radicals in the CAT group increased significantly. The preliminary research results indicated that the effect of CAT on the emulsion related to the lipid oxidation caused by the iron porphyrin group at the center of the enzyme activity. All these results indicated that CAT was not suitable for the removal of residual H2O2 in Antarctic krill oil emulsion. Moreover, it is helpful to avoid the contact of Antarctic krill oil emulsion and CAT during the processing of the krill.

show abstract

Effect of Coagulation Bath Temperature on Mechanical, Morphological, and Thermal Properties of Cellulose/Antarctic Krill Protein Composite Fibers

Cited by 11 publications

References 27 publications

Humidity-Responsive Guar Gum Fibers by Wet Spinning

Humidity-Responsive Guar Gum Fibers by Wet Spinning

Characteristics of Sodium Alginate/Antarctic Krill Protein Composite Fiber Based on Cellulose Nanocrystals Modification: Rheology, Hydrogen Bond, Crystallization, Strength, and Water-Resistance

Preparation of Antarctic Krill Oil Emulsion and Its Stability under Catalase Treatment

Contact Info

Product

Resources

About