Synthesis, characterization and antibacterial properties of novel cellulose acetate sorbate

Wei, Liying; Song, Jun; Cheng, Bowen; Yang, Zhanping

doi:10.1016/j.carbpol.2020.116416

Cited by 22 publications

(12 citation statements)

References 64 publications

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“…CA nanofibers showed two broad peaks at Bragg's angles of 8.47° and 18.52°, which correspond to the crystalline and amorphous regions, respectively (see Figure 3B). CA is also described as an A‐typical semi‐crystalline polymer 45 . These findings corroborate previous studies describing CA as an amorphous microstructure with two broad peaks at 2θ = 10° and 19° 31,36 …”

Section: Resultssupporting

confidence: 90%

Development of prolonged drug delivery system using electrospun cellulose acetate/polycaprolactone nanofibers: Future subcutaneous implantation

Wsoo

Razak

Shahir

et al. 2021

Polymers for Advanced Techs

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Implantable drug delivery systems (IDDSs) play a vital role in treating chronic diseases by reducing dosing frequency and enhancing drug efficacy due to targeted delivery. In the present study, an IDDS was developed from electrospun cellulose acetate (CA) and polycaprolactone (PCL) nanofiber membranes. The implant core consists of a drug‐loaded CA nanofiber (CA + Vit.D3) enclosed in a rate limiting of the PCL membrane (CA + Vit.D3/PCL). The CA and PCL nanofibrous membranes were characterized using a scanning electron microscope (SEM), Fourier transform infrared spectroscopy, X‐ray diffraction, and UV–Vis spectroscopy. This research also investigated in‐vitro cytotoxicity and whether the PCL membrane prolonged drug delivery or led to enhanced mechanical properties. A smooth, beadless surface morphology was observed with fiber diameters of 325 ± 101 nm and 333 ± 79 nm for CA and PCL, respectively. In‐vitro drug release and tensile testing showed that surrounding the core's implants with a PCL membrane improved mechanical properties and kinetic drug release. The modulus and tensile strength of CA + Vit.D3/PCL were 161 ± 14 and 13.07 ± 2.5 MPa, respectively—these values were significantly higher than those obtained for CA + Vit.D3 (132 ± 52 MPa and 8.16 ± 2.36 MPa, respectively). The drug release pattern exhibited by CA + Vit.D3 was burst release, which fits the first‐order kinetic model. In contrast, CA + Vit.D3/PCL exhibited slow drug release, which fits the zero‐order kinetic model. In conclusion, based on the outcomes and facility of the technologies outlined in this article, electrospun CA and PCL nanofibers are suitable for developing long‐term IDDSs.

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Section: Resultssupporting

confidence: 90%

Development of prolonged drug delivery system using electrospun cellulose acetate/polycaprolactone nanofibers: Future subcutaneous implantation

Wsoo

Razak

Shahir

et al. 2021

Polymers for Advanced Techs

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show abstract

“…It was observed that the number of grips is linearly related to the number of current signals in Figure 5i. When various numbers of grips (2,4,6,8,10,12,14,16,18,20) were applied to the grip ball in succession, the corresponding numbers of electrical signals would be detected. These application demonstrations of a smart sports elbow supporter and a grip ball in sports and health exercises imply that the PNF-TENG has a bright future in the field of human motion sensing.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…CA powders were dissolved in acetone/water mixed solvents (85/15, v/v) to obtain 10 wt % transparent CA solutions. Different amounts (5,10,20,40,60 wt %) of nano-Al 2 O 3 fillers were dispersed in acetone/ water/dispersant solutions by alternate stirring and ultrasonic vibration. Subsequently, the finely dispersed nanoparticles were mixed with the CA transparent solutions and stirred vigorously at 60 °C for 60 min.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Cellulose acetate (abbreviated as CA), as abundant biological resources, is considered an attractive tribomaterial due to its nontoxicity, non-irritation, good processability, film-forming ability, cost-effectiveness, biodegradability, and biocompatibility. − In general, CA biomaterial is spun into an electrospun nanofibrous membrane with the aid of electrospinning technology, which is used for the construction of green wearable TENG . Although cellulose acetate nanofibrous membrane-based TENGs have great characteristics such as flexibility, high surface contact area, and light weight, they find it difficult to meet the mechanical durability need for human daily movement.…”

Section: Introductionmentioning

confidence: 99%

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An Eco-friendly Porous Nanocomposite Fabric-Based Triboelectric Nanogenerator for Efficient Energy Harvesting and Motion Sensing

Bai

et al. 2020

ACS Appl. Mater. Interfaces

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A wearable and effective tribopositive material, especially an economical and eco-friendly triboelectric fabric developed from biomaterials, is highly crucial for the development of green wearable triboelectric nanogenerators. In this work, we design a porous nanocomposite fabric (PNF) with strong charge accumulation capacity through a facile dry-casting method and use it as a tribopositive material to construct attractive wearable triboelectric nanogenerators (abbreviated as TENGs). Specifically, the porous nanocomposite is developed by the incorporation of nano-Al 2 O 3 fillers into cellulose acetate networks. By adjusting the concentration of casting solution and the content of nano-Al 2 O 3 fillers, we systematically engineer the physical properties of the PNF for obtaining a large triboelectric charge yield. When a 10 wt % solution concentration and 10 wt % nanofiller content are adopted for the PNF, the corresponding PNF-TENG can deliver an electrical performance of ∼2.5 mW/cm 2 on a 0.8 MΩ external resistor. This remarkable output can be ascribed to the synergistic effect between the appropriate porous network and improved dielectric properties of the nanocomposite. Moreover, the PNF-TENG also exhibits good reliable electrical outputs under multiple stain-washing measurements or after experiencing cyclical contact− separation 13,500 times. Also, the device is capable of charging various capacitors, lighting LED arrays, and driving commercial wrist watches and is proven to be an efficient and reliable green wearable power source. Furthermore, a PNF-TENG-based elbow supporter and a grip ball, as self-powered sensors, are proposed to realize real-time detection for human actions during sports exercise. This work proposes an eco-friendly nanocomposite fabric as an effective tribopositive material, verifies the feasibility of developing environmentally friendly wearable power sources and sensors, and provides new insights into the design of green wearable triboelectric nanogenerators.

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“…33 Afterward, proportional benzoyl chloride was added dropwise in the above solution to trigger the reaction under an ice bath. 34 After the reaction at 60 °C for 2 h, the product was precipitated in a large amount of deionized water. Furthermore, the product was filtrated and washed with deionized water to remove the residual substances completely.…”

Section: Methodsmentioning

confidence: 99%

Zero–Zero Birefringence Cellulose Acetate-Based Optical Films by Benzoylation

Min

Han

et al. 2022

ACS Appl. Polym. Mater.

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Zero−zero birefringence film is one of the key components in optical displays, and its design and preparation remain a challenge nowadays. Here, we report the synthesis of benzoylated cellulose acetate (BCA), the preparation of BCA films by solution casting, and the birefringent properties of unstretched and stretched BCA films. It is found that zero−zero birefringence films can be fabricated using both unstretched and stretched BCA films. As the degree of substitution of benzoyl (DS Bz ) increases, the out-of-plane birefringence (Δn th ) gradually decreases and changes from positive to negative. Particularly, for DS Bz = 0.511, both the in-plane birefringence (Δn in ) and out-of-plane birefringence (Δn th ) of stretched BCA films are close to zero. The orientations of the acetyl and benzoyl groups under stretching are measured to interpret the underlying compensation mechanisms. Finally, we show that the wavelength dispersion of BCA films with DS Bz = 0.511 varies significantly with the increase in draw ratio, and formulize the normalized birefringence with the relative orientation degree of the benzoyl and acetyl groups. Our results suggest that the birefringence and wavelength dispersion of cellulose acetate-based optical films can be well regulated by a combination of chemical modification and stretching, and have potential significance to the industrial production of zero−zero birefringence films.

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Synthesis, characterization and antibacterial properties of novel cellulose acetate sorbate

Cited by 22 publications

References 64 publications

Development of prolonged drug delivery system using electrospun cellulose acetate/polycaprolactone nanofibers: Future subcutaneous implantation

Development of prolonged drug delivery system using electrospun cellulose acetate/polycaprolactone nanofibers: Future subcutaneous implantation

An Eco-friendly Porous Nanocomposite Fabric-Based Triboelectric Nanogenerator for Efficient Energy Harvesting and Motion Sensing

Zero–Zero Birefringence Cellulose Acetate-Based Optical Films by Benzoylation

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