Reinforcement of hydroxypropylcellulose films by cellulose nanocrystals in the presence of surfactants

Rehman, Noor; Miranda, Maria Inez Graf de; Rosa, Simone Maria Leal; Bica, Clara Isméria Damiani

doi:10.1007/s10118-016-1844-y

Cited by 7 publications

(4 citation statements)

References 32 publications

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“…coli and S. aureus of the PLA/GO–ZnO nanocomposite films was clearly observed. , Rehman et al applied cornstalk cellulose nanocrystals in the presence of a low concentration of surfactants of sodium dodecyl sulfate or cetyltrimethylammonium bromide to fill the HPC matrix and obtained a bio-nanocomposite film with the uniform dispersion of nanocrystals, resulting in superior anti-UV and antibacterial properties …”

Section: Introductionmentioning

confidence: 99%

“…13,14 Rehman et al applied cornstalk cellulose nanocrystals in the presence of a low concentration of surfactants of sodium dodecyl sulfate or cetyltrimethylammonium bromide to fill the HPC matrix and obtained a bio-nanocomposite film with the uniform dispersion of nanocrystals, resulting in superior anti-UV and antibacterial properties. 15 Recently, GO−inorganic nanocomposites have been investigated as fillers, and a series of excellent properties have been achieved. 16−18 The considerable adhesion between GO and metal oxide nanomaterials is beneficial for applications involved charge transfer.…”

Section: Introductionmentioning

confidence: 99%

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Graphene Oxide–IPDI–Ag/ZnO@Hydroxypropyl Cellulose Nanocomposite Films for Biological Wound-Dressing Applications

Wang

Shi

et al. 2019

ACS Omega

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In this work, we proposed a feasible approach to prepare multifunctional composite films by introducing a nanoscaled filler into a polymer matrix. Specifically, thanks to isophorone diisocyanate (IPDI) acting as a coupling agent, the hydroxyl groups and carboxyl groups on the surface of graphene oxide (GO) and the hydroxyl groups on the surface of silver-coated zinc oxide nanoparticles (Ag/ZnO) are covalently grafted, forming GO–IPDI–Ag/ZnO (AGO). The prepared AGO was then introduced into the hydroxypropyl cellulose (HPC) matrix to form AGO@HPC nanocomposite films by solution blending. AGO@HPC nanocomposite films exhibited improved mechanical, anti-ultraviolet, and antibacterial properties. Specifically, a tensile test showed that the tensile strength of the prepared AGO@HPC nanocomposite film with the addition of as low as 0.5 wt % AGO was increased by about 16.2% compared with that of the pure HPC film. In addition, AGO@HPC nanocomposite films showed a strong ultraviolet resistance and could effectively inactivate both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria at a low loading of AGO, and rapid sterilization plays a crucial role in wound-healing. In vivo results show that the AGO@HPC release of Ag+ and Zn2+ stimulates the immune function to produce a large number of white blood cells and neutrophils, thereby producing the synergistic antibacterial effects and accelerated wound-healing. Therefore, our results suggest that these novel AGO@HPC nanocomposite films with improved mechanical, anti-ultraviolet, and antibacterial properties could be promising candidates for antibacterial packaging, biological wound-dressing, etc. The abuse of antibiotics has brought about serious drug-resistant bacteria, and our nanofilm antibacterial does not entail such problems. In addition, local administration reduces the possibility of changing the body’s immune system and organ toxicity, which greatly increases the safety.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Graphene Oxide–IPDI–Ag/ZnO@Hydroxypropyl Cellulose Nanocomposite Films for Biological Wound-Dressing Applications

Wang

Shi

et al. 2019

ACS Omega

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“…Moreover, Noor Rehman et al. synthesized hydroxypropyl cellulose films by casting cellulose nanocrystals in the presence of anionic surfactant SDS and cationic surfactant cetyltrimethylammonium bromide . Cheng et al.…”

Section: Introductionmentioning

confidence: 99%

A Synthesis of a Dust Suppressant Using the Cellulose Extracted from Maize Straw

et al. 2019

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In this paper, a cellulose‐based dust suppressant is synthesized using common maize straw as the raw material. In order to obtain high‐quality cellulose, a chemical, acid‐based treatment is employed for the extraction of cellulose and the removal of hemicellulose and lignin. By using polyvinyl alcohol (PVC) as a monomer, potassium persulfate (K2S2O4) as an initiator, aluminum hydroxide (Al(OH)3) as a crosslinker, and glycerol (C3H8O3) as a plasticizer (mass ratios of 28.5%, 1.0%, 0.5%, and 19.0%, respectively), the polyvinyl alcohol grafted cellulose dust suppressant is fabricated in a water bath of 70 ˚C after 5 h. The characteristics of the dust suppressant are measured using a Fourier transform infrared spectrometry, scanning electron microscope, thermogravimetric analyzer, universal testing machine, and wind tunnel simulation platform. At a concentration of 5%, the dust suppressant demonstrates some excellent functionality, such as economic rationality, film‐forming capability, compression resistance, temperature adaptability, and wind erosion resistance. As the raw material is easy to obtain and pollution‐free, this new dust suppressant has promising market prospects.

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“…However, because of the high crystallinity and strong intermolecular hydrogen bonds, cellulose could not be melted or dissolved in common solvents, which limits their applications. Some materials based on nano-sized cellulose and chemically modified cellulose have been prepared [7][8][9]. However, the production costs needs to be significantly reduced to extend their range of applications.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system

Liu

Jing

et al. 2019

Nanocomposites

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New green solvent system alkali (such as NaOH and LiOH)/urea which could rapidly dissolve cellulose could be potentially used to prepare high-performance regenerated cellulose materials with low cost. Pure regenerated cellulose materials have relatively low strength inherent effects. In this work, we choose TEMPO-oxide cellulose nanofiber (CNF) and graphene oxide (GO) as fillers to prepare isotropic regenerated cellulose membrane (RCM) with significantly enhanced mechanical properties. Dynamic mechanical analyzer (DMA) test shows that RCM with content of 5 wt% CNF has the maximum enhancement value of 32.5% improvement comparing with pure RCM. And RCM with 0.4 wt% GO has the maximum improvement of 17.9%. Mechanical properties decrease with further increasing filler contents. We employ transmission electron microscopy to confirm the structure of fillers in solution and scanning electron microscopy to observe the microstructures of these RCMs. The results are consistent with DMA tests. In addition, XRD results confirm that the crystal structure of RCMs is the same with RCMs without filler. Thermogravimetric analyses results indicate that RCMs keep great thermal stability below 300 C. Transmittance (T r ) property is carried out by UV-Vis spectroscopy. Pure RCMs and CNF/RCMs keep high transparency at the wavelength of 800 nm. Transparency of RCMs with GO decrease quickly when the content of GO increases. In conclusion, the enhancement mechanism is proposed as the addition of fillers makes up the defects in RCMs. Furthermore, CNF illustrates large aspect ratio which is beneficial for stress transfer. As for GO, polar groups on surface provide strong interaction with the matrix. This is the first time that the enhancement effects of different fillers are systematically analyzed and compared for RCMs system. Our work could benefit the selection of appropriate fillers for such green solvent system and expand its range of applications.

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Reinforcement of hydroxypropylcellulose films by cellulose nanocrystals in the presence of surfactants

Cited by 7 publications

References 32 publications

Graphene Oxide–IPDI–Ag/ZnO@Hydroxypropyl Cellulose Nanocomposite Films for Biological Wound-Dressing Applications

Graphene Oxide–IPDI–Ag/ZnO@Hydroxypropyl Cellulose Nanocomposite Films for Biological Wound-Dressing Applications

A Synthesis of a Dust Suppressant Using the Cellulose Extracted from Maize Straw

Preparation of high-performance cellulose composite membranes from LiOH/urea solvent system

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