Mechanically strong and biodegradable holocellulose films prepared from Camellia oleifera shells

Long, Haibo; Gu, Jin; Jiang, Jianchun; Guan, Lan; Lin, Xiuyi; Zhang, Weiwei; Hu, Chuanshuang

doi:10.1016/j.carbpol.2022.120189

Cited by 15 publications

(6 citation statements)

References 48 publications

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“…As demonstrated above, biobased intelligent food packaging materials with sustained-release antibacterial and real-time monitoring ability have been successfully fabricated. Owing to the biobased raw materials and high biocarbon content (almost 100%), the obtained high-level sustainable materials are biodegradable in the soil, which will greatly benefit their applications in disposable packaging materials. , As shown in Figure , the appearance of the SA film, paper, and the obtained multifunctional paper-based composite gradually change after degradation in soil for 4, 8, 12, and 30 days. The SA film, as a hydrophilic degradable material, decomposes into fragments after 4 days and almost completely degrades after 12 days.…”

Section: Resultsmentioning

confidence: 99%

Biobased Intelligent Food-Packaging Materials with Sustained-Release Antibacterial and Real-Time Monitoring Ability

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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It has been widely accepted that sustainable polymers derived from renewable resources are able to replace the short-turnover petroleum-based materials and reduce environmental impact in the future. However, their hydrophilic chemical structures rich with oxygen groups could lead to easy growth of bacteria, which greatly limit their applications in packaging materials. Here, we present an intelligent food-packaging material with sustained-release antibacterial and real-time monitoring ability based on totally biobased contents. In detail, sodium alginate with Artemisia argyi emission oil (encapsulated in gelatin–Arabic gum microcapsules) and citric acid-sourced pH-responsive carbon quantum dots (CQDs) are coated on bamboo cellulose papers. The obtained biobased composite material (almost 100% biocarbon content) with antibacterial ability is able to extend the shelf life of fresh shrimps and can be biodegraded. Moreover, owing to the introduction of CQDs, the composite can rapidly (within 1 s) detect slight pH variations (response pH ∼5, 10–9 mol/L of OH–) through an obvious color change (hue value from 305 to 355°). The developed strategy may open up new opportunities in the design of multifunctional biobased composites for intelligent applications.

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Section: Resultsmentioning

confidence: 99%

Biobased Intelligent Food-Packaging Materials with Sustained-Release Antibacterial and Real-Time Monitoring Ability

Liu

et al. 2023

ACS Appl. Mater. Interfaces

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“…The primary chemical components of Camellia oleifera fruit shells are cellulose, hemicellulose, and lignin, the same major constituents as wood [37]. Cellulose was obtained by alkali boiling and subbleaching from fresh Camellia oleifera shells by the following steps: The shells were cleaned with deionized water to remove mud and impurities, followed by placement in a blast drying oven at 60 • C for 4 h. Subsequently, the dried shells were ground and sieved using a 60-mesh sample sieve.…”

Section: Pretreatment Methods 221 Preparation Of Cellulosementioning

confidence: 99%

“…Electron microscope scanning results showed that the surface of the DMAc/LiCl-treated cellulose (Figure 2b-e) was rougher and shorter in length compared to native cellulose (Figure 2a), which provides a greater possibility for subsequent oxidation reactions, and the higher the concentration of LiCl in the dissolved system, the more obvious the treatment effect on cellulose. The surface of the treated cellulose was rougher due to the effective removal of lignans [37] and the swelling of cellulose by the DMAc/LiCl system [43]. The mechanism of the DMAc/LiCl system on cellulose may involve an initial complexation reaction between Li + and the carbonyl group as well as the nitrogen atom in DMAc.…”

Section: Surface Morphology Analysismentioning

confidence: 99%

TEMPO-Oxidized Nanocellulose Films Modified by Tea Saponin Derived from Camellia oleifera: Physicochemical, Mechanical, and Antibacterial Properties

Jiang,

Hu,

Cheng

2024

Polymers

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Nanocellulose materials have been widely used in biomedicine, food packaging, aerospace, composite material, and other fields. In this work, cellulose obtained from Camellia shells through alkali boiling and subbleaching was micro-dissolved and regenerated using the DMAc (N,N-Dimethylacetamide)/LiCl system, and TOCNs (TEMPO-oxidized cellulose nanofibers) with different degrees of oxidation. The membrane was prepared by filtration of polytetrafluoroethylene (pore size 0.1 μm), and the oxidized nanocellulose film was obtained after drying, Then, the crystallinity, mechanical properties and oxygen barrier properties of the TOCN film were investigated. Furthermore, based on TS (tea saponin) from Camellia oleifera seed cake and TOCNs, TS-TOCN film was prepared by the heterogeneous reaction. The TS-TOCN film not only shows excellent oxygen barrier properties (the oxygen permeability is 2.88 cc·m−2·d−1) but also has good antibacterial effects on both Gram-negative and Gram-positive bacteria. The antibacterial property is comparable to ZnO-TOCN with the same antibacterial content prepared by the in-situ deposition method. Antioxidant activity tests in vitro showed that TS-TOCN had a significant scavenging effect on DPPH (2,2-Diphenyl-1-picrylhydrazyl) radicals. This design strategy makes it possible for inexpensive and abundant Camellia oleifera remainders to be widely used in the field of biobased materials.

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“…The utilization rate of COS is low, and it is mainly used as a solid fuel [22] or dumped improperly [23,24], which has the potential to impact the environment. COS primarily consists of cellulose, lignin, and hemicellulose [25,26], and can serve as the perfect raw material for obtaining activated carbon [27]. COS manufactured biochar can adsorb toxic chemicals [28,29] and heavy metals [30,31] in water [32].…”

Section: Introductionmentioning

confidence: 99%

In Situ Modification of Activated Carbon Made from Camellia oleifera Shell with Na2EDTA for Enhanced La3+ Recovery

Huang,

Zeng,

Fan

et al. 2024

Minerals

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It is important to recover La3+ from metallurgical solutions or wastewater. However, the recovery rate of La3+ is usually less than 1% and the recovery methods are not environmentally friendly or user-friendly. Therefore, a straightforward, efficient, clean, and economically friendly method is needed. In this investigation, a modified adsorbent, COSAC-Na2EDTA-15, which was made from the Camellia oleifera shell (COS) and disodium ethylenediaminetetraacetic acid (Na2EDTA), was invented. In addition, characterization of the COSAC-Na2EDTA-15 adsorbent was conducted using SEM and XPS, and the principle of adsorption was revealed. The adsorption kinetics followed P-S-O KM, while the isotherm of COS-activated carbon (COSAC) aligned more closely with the Langmuir model. Compared to COSAC, the maximum La3+ adsorption capacity of COSAC-Na2EDTA-15 increased from 50 to 162.43 mg/g, and the content of O and N changed from 7.31% and 1.48% to 12.64% and 4.15%, respectively. The surface of the COSAC-Na2EDTA-15 exhibited abundant C, N, and O elements, and La3+ was detected on the sample surface after adsorption. The test and analysis results fully indicate that La3+ can be successfully adsorbed on the surface of COSAC-Na2EDTA-15. Because of its easy preparation, low cost, and superior performance, activated carbon made from COS finds extensive applications in the adsorption and recovery of rare earth elements.

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Mechanically strong and biodegradable holocellulose films prepared from Camellia oleifera shells

Cited by 15 publications

References 48 publications

Biobased Intelligent Food-Packaging Materials with Sustained-Release Antibacterial and Real-Time Monitoring Ability

Biobased Intelligent Food-Packaging Materials with Sustained-Release Antibacterial and Real-Time Monitoring Ability

TEMPO-Oxidized Nanocellulose Films Modified by Tea Saponin Derived from Camellia oleifera: Physicochemical, Mechanical, and Antibacterial Properties

In Situ Modification of Activated Carbon Made from Camellia oleifera Shell with Na2EDTA for Enhanced La3+ Recovery

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