Soy Protein Isolate/Polycaprolactone Blends: Compatibility Reactions and Water Absorption Mechanisms

Zhong, Zhihui; Sun, Susan; Hagan, S. A.; Gehrke, Stevin H.

doi:10.13031/2013.18485

Cited by 7 publications

(10 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Neat SPC (Figure 6b) showed strong absorption bands at 1514 (NH stretch, amide II), 1658 (CO stretch, amide I), and 3338 cm −1 (NH stretch). 20 A small shoulder at 1760 cm −1 (CO stretching of PLA) was noted in the extracted residue from the composite with 4 phr PLA-g-MA (Figure 6d), which was not observed in the residue of the composite without PLA-g-MA (Figure 6c). This result substantiated the postulation that the grafted MA groups on the PLA-g-MA can react with the functional groups of SPC.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

“…Neat PLA (Figure a) had a strong absorption band at 1760 cm –1 (CO stretching). Neat SPC (Figure b) showed strong absorption bands at 1514 (NH stretch, amide II), 1658 (CO stretch, amide I), and 3338 cm –1 (NH stretch) . A small shoulder at 1760 cm –1 (CO stretching of PLA) was noted in the extracted residue from the composite with 4 phr PLA- g -MA (Figure d), which was not observed in the residue of the composite without PLA- g -MA (Figure c).…”

Section: Resultsmentioning

confidence: 95%

See 1 more Smart Citation

Compatibilizing Effects of Maleated Poly(lactic acid) (PLA) on Properties of PLA/Soy Protein Composites

Zhu

Liu

Zhang

2012

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Poly(lactic acid) (PLA)/soy protein concentrate (SPC) composites were prepared using a twin-screw extruder. Extra amounts of water and glycerol were added to SPC prior to compounding with PLA to ensure that SPC behaved like a thermoplastic during subsequent mixing. Free radical grafting of maleic anhydride (MA) onto PLA was performed by reactive extrusion, and PLA-g-MA was used as a compatibilizer in the composites. The effects of compatibilizer concentration and degree of functionality on the tensile, morphological, and thermal properties of PLA/SPC composites were studied. The tensile strength of the composites containing 4 phr compatibilizer increased by 19% compared to that of the uncompatibilized one. Also, the presence of compatibilizer resulted in finer domain sizes of SPC and a lower damping peak, both of which suggested that good interfacial adhesion between the two phases was achieved. Differential scanning calorimetry analysis indicated that SPC induced and accelerated cold crystallization of PLA.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 95%

Compatibilizing Effects of Maleated Poly(lactic acid) (PLA) on Properties of PLA/Soy Protein Composites

Zhu

Liu

Zhang

2012

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…In vitro studies using Xenopus oocytes have shown that TMPRSS3 proteolytic activity is associated with increased ENaC mediated currents. The ENaC channel is composed of three subunits (␣, ␤, ␥), which are all expressed in the cochlea (24,25) and could participate in the reabsorption of sodium from the endolymph and therefore in maintaining the low sodium concentration in the endolymph (26). However, the TMPRSS3/ENaC functional hypothesis has been challenged by the fact that pseudohypoaldosteronism type 1 patients, who are homozygous for mutations in the ENaC ␣ subunit, exhibit normal hearing (10).…”

Section: Discussionmentioning

confidence: 99%

Tmprss3, a Transmembrane Serine Protease Deficient in Human DFNB8/10 Deafness, Is Critical for Cochlear Hair Cell Survival at the Onset of Hearing

Fasquelle

Scott

Lenoir

et al. 2011

Journal of Biological Chemistry

View full text Add to dashboard Cite

Mutations in the type II transmembrane serine protease 3 (TMPRSS3) gene cause non-syndromic autosomal recessive deafness (DFNB8/10), characterized by congenital or childhood onset bilateral profound hearing loss. In order to explore the physiopathology of TMPRSS3 related deafness, we have generated an ethyl-nitrosourea-induced mutant mouse carrying a protein-truncating nonsense mutation in Tmprss3 (Y260X) and characterized the functional and histological consequences of Tmprss3 deficiency. Auditory brainstem response revealed that wild type and heterozygous mice have normal hearing thresholds up to 5 months of age, whereas Tmprss3 Y260X homozygous mutant mice exhibit severe deafness. Histological examination showed degeneration of the organ of Corti in adult mutant mice. Cochlear hair cell degeneration starts at the onset of hearing, postnatal day 12, in the basal turn and progresses very rapidly toward the apex, reaching completion within 2 days. Given that auditory and vestibular deficits often co-exist, we evaluated the balancing abilities of Tmprss3 Y260X mice by using rotating rod and vestibular behavioral tests. Tmprss3 Y260X mice effectively displayed mild vestibular syndrome that correlated histologically with a slow degeneration of saccular hair cells. In situ hybridization in the developing inner ear showed that Tmprss3 mRNA is localized in sensory hair cells in the cochlea and the vestibule. Our results show that Tmprss3 acts as a permissive factor for cochlear hair cells survival and activation at the onset of hearing and is required for saccular hair cell survival. This mouse model will certainly help to decipher the molecular mechanisms underlying DFNB8/10 deafness and cochlear function.

show abstract

“…These reactions can be catalyzed with tertiary amines (such as triethylamine, TEA) which may coordinate with either the isocyanate or the nucleophile to increase reactivity . In those investigations involving reactions of proteins with diisocyanates, − the proteins were dried prior to reaction with the diisocyanate to reduce the amount of reaction of methylenediphenyl 4,4′-diisocyanate (MDI) with water present in the system. Melt extrusion, based on its cost efficiency, processing ease, and high throughput capabilities, is the method of choice to provide the lowest cost article.…”

Section: Introductionmentioning

confidence: 99%

“…Melt extrusion, based on its cost efficiency, processing ease, and high throughput capabilities, is the method of choice to provide the lowest cost article. Soy protein isolate and polycaprolactone (PCL) were treated with MDI in the melt state to generate materials with enhanced elongation properties and water resistance; however, tensile strength decreased. , Modification of PCL with hexamethylene diisocyanate generated a PCL diisocyanate prepolymer that was then allowed to react with zein in solution to provide a product with improved mechanical properties and water resistance. , Melt-processing of zein with PCL yielded an incompatible product with poor interfacial interaction between the polymers …”

Section: Introductionmentioning

confidence: 99%

Reaction of Zein with Methylenediphenyl Diisocyanate in the Melt State: Thermal, Mechanical, and Physical Properties

Sessa

Selling

Biswas

2012

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Corn protein (zein) was melt-processed with methylenediphenyl 4,4′-diisocyanate (MDI) using triethylamine (TEA) as a catalyst to facilitate the reaction of the isocyanate groups with the nucleophilic moieties present on zein. The product of the reaction was examined using sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) to monitor changes in molecular weight. Techniques used to evaluate property changes after reaction included FTIR, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and evaluation of mechanical properties. Our findings demonstrated that zein reacts with MDI in the melt state generating higher molecular weight compounds that after compression molding have improved physical properties and solvent resistance.

show abstract

Soy Protein Isolate/Polycaprolactone Blends: Compatibility Reactions and Water Absorption Mechanisms

Cited by 7 publications

References 0 publications

Compatibilizing Effects of Maleated Poly(lactic acid) (PLA) on Properties of PLA/Soy Protein Composites

Compatibilizing Effects of Maleated Poly(lactic acid) (PLA) on Properties of PLA/Soy Protein Composites

Tmprss3, a Transmembrane Serine Protease Deficient in Human DFNB8/10 Deafness, Is Critical for Cochlear Hair Cell Survival at the Onset of Hearing

Reaction of Zein with Methylenediphenyl Diisocyanate in the Melt State: Thermal, Mechanical, and Physical Properties

Contact Info

Product

Resources

About