Structural and morphological characterization of a new semi-polyrotaxane architecture based on 2-hydroxypropyl-β-cyclodextrins and polyisoprene

Resmeriță, Ana-Maria; Silion, Mihaela; Cojocaru, Corneliu; Farcas, Aurica

doi:10.1016/j.reactfunctpolym.2022.105459

Cited by 2 publications

(6 citation statements)

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“…The diffractogram of the composite material 2 , containing 5 wt% of PI/HPβCD SR in the matrix, exhibits the same amorphous halo with the peaks in the low-angle regions at 2θ = 12.22° and 22.7°, respectively; they also correlated to the disordered packing of HPβCD and short-range order of uncovered PEG segments [ 31 ]. The peaks corresponding to the PI polymer are overlapped with the ones from the PEG matrix [ 17 , 32 , 33 ]. In contrast, the diffraction pattern of the composite material 3 , containing 10 wt% of PI/HPβCD, exhibits more intense peaks at 2θ = 19.32° and 23.53°, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Taking into account that the PI/HPβCD SR film surface is hydrophilic [ 17 ] and it induces porous morphologies, it is expected that the composite films should have hydrophilic surfaces. To obtain more insights into the surface morphological characteristics, dynamic vapor sorption measurements were further performed.…”

Section: Resultsmentioning

confidence: 99%

“…The synthesis of PI/HPβCD semi-polyrotaxane was performed according to the previously reported procedure [ 17 ].…”

Section: Methodsmentioning

confidence: 99%

“…The synthesis of PI/HPβCD semi-polyrotaxane was performed according to the previously reported procedure [17]. The material (1) was obtained by mixing the solution of PEG/HPβCD (50 mg dissolved in 3 mL of dry DMF) with HMDI (0.2 mL, 1.24 mmol).…”

Section: Synthesis Of Pi/hpβcd Srmentioning

confidence: 99%

“…To date, the most commonly designed slide-ring supramolecular networks employed the use of poly(ethylene glycol) (PEG) and α-cyclodextrins (α-CD) [ 15 ]. Recently, our group succeeded to obtain rotaxane structures using HPβCD, which also have the advantages of low cost, non-toxicity, and commercial availability [ 16 , 17 ]. For the construction of such supramolecular structures, the threading method is employed but in case of polymers with molecular weights higher than 30 kDa, coverage ratio is difficult to control.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Properties and Adsorption Kinetic Study of New Cross-Linked Composite Materials Based on Polyethylene Glycol Polyrotaxane and Polyisoprene/Semi-Rotaxane

Resmeriță¹,

Bargan²,

Cojocaru³

et al. 2023

Materials

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New composite materials were prepared via cross-linking of polyethylene glycol/2-hydroxypropyl-β-cyclodextrins polyrotaxane (PEG/HPβCD) and polyisoprene/HPβCD semi-polyrotaxane (PI/HPβCD SR) with 1,6-hexamethylene diizocyanate (HMDI). Advanced instrumental methods (such WAXS (wide angle X-ray scattering), AFM (atomic force microscopy), SEM (scanning electron microscopy), and thermal and dynamic vapor sorption) were employed for the structural, morphological and thermal characterization of the resulting composite materials. The roughness parameters calculated using AFM indicate a smoother surface for the composite material with 10 wt% of PI/HPβCD SR, denoting that a homogeneous film was obtained. SEM analysis reveals porous morphologies for both composite materials and the pore sizes increase with the increasing concentration of PI/HPβCD SR in the matrix. Dynamic vapor sorption/desorption measurements and type IV isotherms confirmed the hydrophilic and porous materials, which are in agreement with SEM analysis. The composite with a higher PI/HPβCD SR concentration in the matrix showed increased thermal stability than that of the pure cross-linked material. This material was further tested as a sorbent for methylene blue (MB) dye removal from an aqueous solution. The adsorption capacity of the composite film was found to be 2.58 mg g−1 at 25 °C.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The synthesis of PI/HPβCD semi-polyrotaxane was performed according to the previously reported procedure [ 17 ].…”

Section: Methodsmentioning

confidence: 99%

Section: Synthesis Of Pi/hpβcd Srmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, Properties and Adsorption Kinetic Study of New Cross-Linked Composite Materials Based on Polyethylene Glycol Polyrotaxane and Polyisoprene/Semi-Rotaxane

Resmeriță¹,

Bargan²,

Cojocaru³

et al. 2023

Materials

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Evaluation of the performance of Hydroxypropyl-β-cyclodextrin for the consolidation of vegetable-tanned leather artifacts

Abdel-Maksoud,

Nasr,

Samaha

et al. 2024

Herit Sci

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The fragility and weakness of historical, archaeological, and heritage leather artifacts in museums, and libraries due to unsuitable environmental conditions are significant challenges. This study aims to assess the effectiveness of Hydroxypropyl Beta Cyclodextrin, a novel material, in consolidating leather artifacts by examining their physical, chemical, and mechanical properties. Vegetable-tanned leather samples were treated with different concentrations of Hydroxypropyl Beta Cyclodextrin and subjected to artificial heat aging. Evaluation methods included digital and scanning electron microscopy, contact angle measurements, mechanical testing, color analysis, pH measurement, and Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy. Results showed that Hydroxypropyl Beta Cyclodextrin at 1% and 2% concentrations improved chemical stability, surface morphology, color retention, and mechanical properties of the leather samples. The third concentration yielded less favorable outcomes. This study recommends using Hydroxypropyl Beta Cyclodextrin at 1% and 2% concentrations for consolidating historical leathers.

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Structural and morphological characterization of a new semi-polyrotaxane architecture based on 2-hydroxypropyl-β-cyclodextrins and polyisoprene

Cited by 2 publications

References 41 publications

Synthesis, Properties and Adsorption Kinetic Study of New Cross-Linked Composite Materials Based on Polyethylene Glycol Polyrotaxane and Polyisoprene/Semi-Rotaxane

Synthesis, Properties and Adsorption Kinetic Study of New Cross-Linked Composite Materials Based on Polyethylene Glycol Polyrotaxane and Polyisoprene/Semi-Rotaxane

Evaluation of the performance of Hydroxypropyl-β-cyclodextrin for the consolidation of vegetable-tanned leather artifacts

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