The crosslinking behaviour of cellulose in gamma irradiated paper

Moise, Ioan Valentin; Manea, Mihaela; Vasilca, Silvana; Pintilie, Cosmin; Vîrgolici, Marian; Cutrubinis, Mihalis; Stănculescu, Ioana; Meltzer, Viorica

doi:10.1016/j.polymdegradstab.2018.12.005

Cited by 17 publications

(5 citation statements)

References 34 publications

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“…γ radiation has been used occasionally for the biological disinfection of library and archival documents (after floods for instance) as an alternative to the toxic ethylene oxide fumigation. This has triggered some research into γ rays in conservation during the last decade. − γ radiation has been proposed as both efficient for the disinfection of archival paper with active mold contamination and safe for its preservation in the dose range 5–10 kGy, , the minimal dose proposed being 2 kGy . The changes studied were based mostly on the macroscopic properties of paper, such as mechanical and color modifications, ,,, the latter being the most directly observable changes by the naked eye.…”

Section: Introductionmentioning

confidence: 99%

Short- and Long-Term Effects of X-ray Synchrotron Radiation on Cotton Paper

Gimat

Schöder

Thoury³

et al. 2020

Biomacromolecules

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X-ray analytical techniques are increasingly being used to study manuscripts and works of art on paper, whether with laboratory equipment or synchrotron sources. However, it is difficult to anticipate the impact of X-ray photons on paper- and cellulose-based artifacts, particularly due to the large variety of their constituents and degradation levels, and the subsequent material multiscale heterogeneity. In this context, this work aims at developing an analytical approach to study the modifications in paper upon synchrotron radiation (SR) X-ray radiation using analytical techniques, which are fully complementary and highly sensitive, yet not frequently used together. At the molecular scale, cellulose chain scissions and hydroxyl free radicals were measured using chromatographic separation techniques (size-exclusion chromatography–multiangle laser light scattering–differential refractive index (SEC–MALS–DRI) and reversed-phase high-performance liquid chromatography–fluorescence detector–diode array detector (RP-HPLC–FLD–DAD)), while the optical properties of paper were characterized using spectroscopy (UV luminescence and diffuse reflectance). These techniques showed different sensitivities toward the detection of changes. The modifications in the cellulosic material were monitored in real time, within a few days, and up to 2 years following the irradiation to define a lowest observed adverse effect dose (LOAED). As paper is a hygroscopic material, the impact of the humidity in the environment was studied using this approach. Three levels of moisture content in the paper, achieved by conditioning the samples and irradiating them at different relative humidities (RHs), were studied (0, 50, 80% RH). It was shown that very low moisture content accelerated molecular and optical modifications.

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Section: Introductionmentioning

confidence: 99%

Short- and Long-Term Effects of X-ray Synchrotron Radiation on Cotton Paper

Gimat

Schöder

Thoury³

et al. 2020

Biomacromolecules

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“…The quantitative results obtained after the baseline corrections are listed in Table 2 . The shift in the O (6)H···O(3) intermolecular bonds of S D appeared at higher wavenumbers (weaker bonds) 34 , 53 compared with that of S C , implying that the ice crystals could destroy the intermolecular HBs. Furthermore, the peak area of S D HB inter O (6)H···O(3) decreased by approximately 3.00%, indicating the increased distance between the cellulose chains.…”

Section: Resultsmentioning

confidence: 98%

Failure Mechanism of the Corrugated Medium under Simulated Cold Chain Logistics

Huang

et al. 2023

ACS Omega

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It is necessary to develop corrugated medium food packaging, which is suitable for highly humid environments, to meet the demands of cold chain logistics. In this paper, we investigated the influence of the transverse ring crush index of different environmental factors of corrugated medium and the failure mechanisms during cold chain transportation. After freeze−thaw treatment of corrugated medium, XRD and DP showed a decrease in crystallinity and polymerization of 3.47 and 7.83%, respectively. Also, the FT-IR spectra of the paper showed that the number of intermolecular hydrogen bonds decreased by about 3.00% after freezing. SEM and XRD showed CaCO 3 precipitation on the paper surface and a 26.01% increase in pore size. This study would be beneficial in further expanding the applications of cellulose-based paperboard cold chain transportation.

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“…Similarly, the FTIR spectroscopy of the PBAT/m-PPZn composites was also carried out. The FTIR result shows the area of the corresponding deconvolution peak, which can be used to evaluate the ratio of related chemical groups [ 40 , 41 ]. In the deconvolution process of the FTIR spectra between 1850–1550 cm −1 , the peak close to 1780 cm −1 was assigned to F C=O , the peak close to 1721 cm −1 was assigned to R C=O , and the peak close to 1646 cm −1 was assigned to LMWE.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Photodegradation Stability in Poly(butylene adipate-co-terephthalate) Composites Using Organically Modified Layered Zinc Phenylphosphonate

Wang

Chen

et al. 2020

Polymers

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The enhancement of the ultraviolet (UV) photodegradation resistance of biodegradable polymers can improve their application efficacy in a natural environment. In this study, the hexadecylamine modified layered zinc phenylphosphonate (m-PPZn) was used as a UV protection additive for poly(butylene adipate-co-terephthalate) (PBAT) via solution mixing. The results from the Fourier transform infrared spectroscopy (FTIR) and wide-angle X-ray diffraction analysis of the m-PPZn indicated the occurrence of hexadecylamine intercalation. FTIR and gel permeation chromatography were used to characterize the evolution of the PBAT/m-PPZn composites after being artificially irradiated via a light source. The various functional groups produced via photodegradation were analyzed to illustrate the enhanced UV protection ability of m-PPZn in the composite materials. From the appearance, the yellowness index of the PBAT/m-PPZn composite materials was significantly lower than that of the pure PBAT matrix due to photodegradation. These results were confirmed by the molecular weight reduction in PBAT with increasing m-PPZn content, possibly due to the UV photon energy reflection by the m-PPZn. This study presents a novel approach of improving the UV photodegradation of a biodegradable polymer using an organically modified layered zinc phenylphosphonate composite.

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The crosslinking behaviour of cellulose in gamma irradiated paper

Cited by 17 publications

References 34 publications

Short- and Long-Term Effects of X-ray Synchrotron Radiation on Cotton Paper

Short- and Long-Term Effects of X-ray Synchrotron Radiation on Cotton Paper

Failure Mechanism of the Corrugated Medium under Simulated Cold Chain Logistics

Enhanced Photodegradation Stability in Poly(butylene adipate-co-terephthalate) Composites Using Organically Modified Layered Zinc Phenylphosphonate

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