Effect of nano-SiO2 on the compatibility of PVA/RSF blend

Liu, Yanhua; Mei, Huang; Cai, Dongdan; Sun, Jun; Qin, Chuanxiang; Dai, Lixing; Wang, Jianjun

doi:10.1007/s13726-012-0057-7

Cited by 5 publications

(2 citation statements)

References 33 publications

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“…As the amount of nSiO 2 in the SF/nSiO 2 films increased, the infrared absorption peak of the SF/nSiO 2 films in the Amide II region shifted from 1515 to 1532 cm −1 . For the films with a mass ratio of SF/nSiO 2 = 2.5:1, a characteristic peak near 1532 cm −1 appeared, indicating that the N−H bonds were deformed and suggesting that a weak interaction, likely hydrogen bonding, 53 between silk (free NH group) and nSiO 2 (free OH group) was established, and SF had an α-helical structure in the composite films (Figure 2a 1 ). The physical bond interaction between nSiO 2 and SF also affected the degradation of the composite films.…”

Section: Resultsmentioning

confidence: 99%

Tuning Microcapsule Shell Thickness and Structure with Silk Fibroin and Nanoparticles for Sustained Release

Wang

Cheng

Liu

et al. 2020

ACS Biomater. Sci. Eng.

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Microcapsules have attracted widespread interest for their unique properties in encapsulation, protection, and separation of active ingredients from the surrounding environment. However, microcapsule carriers with controllable shell thickness, permeability, good mechanical properties, and thermostability are challenging to obtain. Herein, robust and versatile composite microcapsules were fabricated using SiO 2 nanoparticle-stabilized (Pickering) oil emulsions as core templates, while silk fibroin (SF) was assembled at the oil/ water interface. This process resulted in the formation of physically and chemically stable microcapsules with a thick (∼800 nm) shell that protected the encapsulated ingredient from high shear forces and high temperatures during spray-drying. SiO 2 nanoparticles were randomly distributed in the shell matrix after preparation, making the microcapsules mechanically robust (4.48 times higher than control samples prepared using surfactant Tween 80 instead of the SiO 2 nanoparticles), as well as thermostable (retained shape to 900 °C). The microcapsules displayed tunable drug release by adjusting the SF content in the shell. Under optimal conditions (weight ratio of SiO 2 /SF = 7:10, corn oil content about 55 wt %), a model drug (curcumin) was encapsulated in the SF microcapsules with an encapsulation efficiency up to 95%. The in vitro drug release from these SF microcapsules lasted longer than control microcapsules, demonstrating the capability of these novel microcapsules in sustaining drug release.

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Section: Resultsmentioning

confidence: 99%

Tuning Microcapsule Shell Thickness and Structure with Silk Fibroin and Nanoparticles for Sustained Release

Wang

Cheng

Liu

et al. 2020

ACS Biomater. Sci. Eng.

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“…The amount of drug was then calculated based on a standard curve. The cumulative release was obtained by comparing the data with the initial weight of the drug incorporated in the electrospun nanofiber mats [11,12].…”

Section: Weight Loss and Swelling Ratiomentioning

confidence: 99%

Preparation and Characterization of Electrospun Poly(vinyl Alcohol)/Silk Fibroin Nanofibers as a Potential Drug Delivery System

Zhang¹,

Dai²

2013

AMR

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A series of poly(vinyl alcohol)/silk fibroin nanofibers loaded with 10 wt.% vanillin were successfully prepared from aqueous solutions via electrospinning. The morphology, weight loss and swelling ability of the nanofibers were characterized. The controlled release characteristics of vanillin in the nanofiber mats were evaluated by in vitro release test. Vanillin-loaded nanofibers had smooth surfaces like drug-free nanofibers, and showed thinner diameter than the latter. The release rate of vanillin in the nanofiber mats decreased with the increment of silk fibroin content, so by regulating the content the drug release could be controlled. Moreover, after treated with ethanol the nanofiber mats showed better stability against disintegration in water and sustained release rate of vanillin than untreated mats.

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Cellulose acetate–silica fume membrane: characterization and application for separation of starch and maltose

2013

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Effect of nano-SiO2 on the compatibility of PVA/RSF blend

Cited by 5 publications

References 33 publications

Tuning Microcapsule Shell Thickness and Structure with Silk Fibroin and Nanoparticles for Sustained Release

Tuning Microcapsule Shell Thickness and Structure with Silk Fibroin and Nanoparticles for Sustained Release

Preparation and Characterization of Electrospun Poly(vinyl Alcohol)/Silk Fibroin Nanofibers as a Potential Drug Delivery System

Cellulose acetate–silica fume membrane: characterization and application for separation of starch and maltose

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