CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Bunan Wu,Somia Yassin Hussain Abdalkarim,Zhijiang Li,Weidong Lu,Hou-Yong Yu
The environmental challenges linked to petroleum-based polymers have accelerated the search for alternative materials like polylactic acid (PLA). Diverse nanofillers, ranging from inorganic to organic and hybrid inorganic/organic varieties, are employed to bolster PLA performance. Yet, non-synergistic nanofillers often underperform due to inadequate dispersion and singular functionality within the PLA matrix. This work introduces carbonized cellulose nanocrystals (GCNC) with rod-like (R-GCNC) and spherical structures (S-GCNC), as synergistic reinforcements for PLA matrix. Unlike traditional nanofillers, the highly graphitized carbon layer on GCNC effectively mitigates CNC agglomeration while preserving cellulose morphology, fostering improved interfacial interactions and hydrogen bonding within PLA matrix. Moreover, GCNC acts as a nucleating agent, boosting the crystallization rate of PLA and enhancing its mechanical properties. Remarkable synergistic reinforcing effects of GCNC on PLA performances were observed. Particularly, the tensile strength of R-GCNC 5 % and S-GCNC 5 % composites surged by 93 % and 76 %, elongation at break increased by 29.4 % and 33.3 %, Young's modulus rose by 37 % and 18 %, and cold crystallization temperature decreased by 11.5 °C and 12.9 °C. Additionally, the GCNC/PLA composites exhibited exceptional thermal stability, UV resistance, and water vapor permeability reduced by 46 % for R-GCNC, and 35 % for S-GCNC, making them promising for industrial and sustainable packaging.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Zixing Zhang,Yuxin Xu,Yun Hu
To enhance the mechanical properties and water resistance of chitosan (CS) films while imparting additional functionalities, this study incorporated a hydrophobic deep eutectic solvent (DES) composed of menthol and pyruvic acid into the CS matrix. At an optimal DES content of 15 %, compared to pure CS films, the elongation at break increased by 77 %, while swelling degree and solubility decreased by 94.44 % and 60.71 %, respectively. The lowest water vapor permeability (11.55 × 10 −11 g·m −1 ·s −1 ·Pa −1 ) demonstrated enhanced moisture barrier properties. These improvements were attributed to the synergistic effects of hydrogen bonding and ionic crosslinking, reinforcing the network structure and restricting water penetration while maintaining molecular mobility. The films also exhibited excellent ultraviolet-shielding (ultraviolet C transmittance of 3 %) with high transparency, making them suitable for light-sensitive packaging. Additionally, they achieved complete biodegradation in soil within 10 weeks, highlighting their potential as sustainable alternatives to petroleum-based plastics. This study presents a novel approach to enhancing bio-based packaging materials through hydrophobic DES, expanding their applications in sustainable food and pharmaceutical packaging.
研究领域:
材料科学
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食品科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2018
·
IF 2.829
Lin Wang,Lizhuan Lin,Xiaohan Chen,Cailing Tong,Jie Pang
To development of konjac glucomannan (KGM) based films for use in food packaging is increasing because of environmental attraction, biodegradability and availability. The objective of this research was to prepare a facile approach for KGM based films. Polydopamine (PDA) functionalized microcrystalline cellulose (PFMC) were incorporated into a KGM matrix. The KGM/PFMC films were prepared by the solvent casting method. The surface morphology of the KGM/PFMC films were generated by scanning electron microscope (SEM) and atomic force microscope (AFM). The crystal structure and thermal ability of the film were generated by X-ray diffraction (XRD) and thermogravimetric analysis (TGA). Rheological behavior, elemental and characteristic peak changes were developed by rheology, X-ray photoelectron spectroscopy (XPS) and fourier infrared spectroscopy (FT-IR). Incorporation of PFMC increased the mechanical properties owing to the high ratio (0.2 g) of PFMC and strong interactions with the KGM. Water vapor permeability (WVP) of the films were significantly decreased. Moreover, PFMC also gave KGM/PFMC films high thermal stability. The results suggest that that KGM/PFMC film is a promising food packaging material.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
·
IF 5.158
Ben Niu,Ping Shao,Hangjun Chen,Peilong Sun
Pullulan acetate (PLAc), pullulan propionate (PLPr) and pullulan butylate (PLBu) with various degrees of substitution (DS) were synthesized from pullulan and different carboxylic anhydrides (acetic anhydride, propionic anhydride and butyric anhydride). The structure of PLAc, PLPr and PLBu were determined by Fourier Transform Infrared Spectrometer (FT-IR) and 1 H Nuclear Magnetic Resonance Spectroscopy ( 1 H-NMR) spectroscopy. Pullulan ester films were obtained by solvent casting. The water vapor permeability, oxygen permeability, surface hydrophobicity, color and mechanical properties were investigated. Compared with native pullulan, all pullulan esters film showed a lower TS. TS and EAB declined with the increase of DS. PLBu3 achieved the lowest water vapor permeability property at 0.792 × 10 −11 g/m s Pa and lowest oxygen permeability property of 0.625 × 10 −3 g/m 2 s. The onset of ripening was monitored in terms of reduction in flesh firmness loss and weight loss. Package fruits with pullulan ester films delayed the ripening and senescence and hence could be used as an effective edible coating for extending their shelf life.
研究领域:
食品科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food Packaging and Shelf Life
·
2022
·
IF 8.749
Jingkun Zhao,Tao Liu,Kai Xia,Xin Liu,Xiaodong Zhang
In this paper, agar/gelatin (AG/GE) composite film modified by cellulose nanocrystals (CNC), agar/gellan gum (AG/GG) and agar/κ-carrageenan (AG/KC) composite films modified by CNC and calcium chloride were prepared and their properties were investigated. The results showed that the three prepared nanocomposite films exhibited dense and smooth surface structure, and their tensile strength (TS), elongation at break (EB) and light transmittance were larger than 60 MPa, 21 %, 80 % at 660 nm, respectively. Their water swelling rate (SR), water solubility (WS) and water vapor permeability (WVP) were lower than 155 %, 33 % and 6.8 × 10 −11 g m/m 2 Pa s, respectively. These three prepared films not only exhibited better comprehensive properties than those of the existing studies, but also possessed edible, good light transmittance and heat seal performance, especially, possessed better fresh keeping performance than plastic-based food packaging film when they were used to preserve strawberry through packaging or coating methods.
研究领域:
食品科学
·
材料科学
·
包装技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2025
·
IF 2.2
Suyang Lu,Jie Su,Haoran Zhan,Jintai Li,Jiaqing Li,Xulin Yang,Zhoukun He,Xiaorong Lan,Wei Feng
Polystyrene (PS), known for its low cost, excellent chemical stability, and optical transparency, has been widely used in various applications including electronic equipment packaging, pharmaceuticals, and food packaging. Although PS demonstrates some hydrogen permeability, its inherent oxygen and water vapor barrier properties require substantial improvement to meet advanced industrial standards. Reduced graphene oxide (rGO) has been extensively employed to enhance the oxygen and water vapor barrier performance of polymer materials. In this study, PS was selected to investigate the relationship between the optimal rGO loading and the oxygen/water vapor barrier properties as well as hydrogen permeability, aiming to achieve unique selective gas barrier characteristics. The water vapor transmission rate decreased significantly from 1.27 g/(m2·day) for pure PS to 0.48 g/(m2·day) for the 1% rGO-PS composite (1%GPS), demonstrating a remarkable improvement in water vapor barrier performance. Similarly, the incorporation of rGO nanofillers enhanced the oxygen barrier properties of PS, reducing the oxygen transmission rate from 4586.11 g/(m2·day) for pure PS to 138.32 g/(m2·day) for 1%GPS. Furthermore, the hydrogen transmission rates (HTR) of pure PS and 1%GPS were 907 cm2/(m2·day·0.1 MPa) and 912 cm2/(m2·day·0.1 MPa), respectively, indicating only a marginal increase in HTR. Consequently, the 1%GPS composite exhibits optimal barrier selectivity, combining superior water vapor barrier properties, oxygen barrier properties, and hydrogen permeability.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Yufeng Li,Zongjun Tang,Wenlin Wang,Xiong Huang,Yanna Lv,Fang Qian,Yi Cheng,Haisong Wang
A paper-based packaging material with improved air barrier and water vapor permeability (WVP) properties was synthesized based on layer-by-layer assembly consisted of poly(ethylenimine) (PEI)/graphene oxide (GO) on a filter paper substrate. The effect of the pH of GO suspension on the zeta potential and air permeability (AP) of the modified paper was investigated in detail. The results indicated that the pH of GO suspension resulted in significant difference in the AP of the modified paper. Compare with the pristine paper, the AP of the modified paper with (PEI/GO) 10 multilayer films synthesized at pH 2.5 decreased by 99.99 %, while the WVP increased by 15.82 %. The modified paper as packaging material could prolong the shelf-life of oyster mushroom, indicating the modified paper has huge potential application on the preservation of agricultural products.
研究领域:
材料科学
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食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ailin Gao,Yang Yang,Changchao Jia,Jian Cui,Bo Wang,Yehai Yan
For the total heat exchange membrane, there is a compromise effect between the moisture permeability and the gas barrier. To overcome this challenge, a new type of total heat exchange membrane was proposed involving a porous polyethylene (PE) membrane and a hydrophilic poly (N, N-dimethyl acrylamide) (PDMAA) hydrogel. A dense PE/PDMAA composite membrane was fabricated via an in situ photoinitiated free-radical polymerization and cross-linking reaction through a pre-permeation of N, N-dimethyl acrylamide (DMAA) monomers in the porous structure of the PE membrane. In this study, we systematically investigated the effect of varying amounts of PDMAA filler on membrane morphology, hydrophilicity, stability, mechanical properties, water vapor transmission rate, gas barrier property, and total heat exchange efficiency. These results demonstrate that a tight, stable PE/PDMAA hybrid membrane with an interlocked structure has been created. Water vapor diffusion channels and an efficient carbon dioxide (CO 2 ) barrier were successfully constructed through the introduction of a cross-linked PDMAA hydrogel. Improvements in water vapor transmission rate and reduction in CO 2 transmission rate were achieved simultaneously with increasing PDMAA filling amount. Excellent mechanical properties and hybrid stability were also observed for the composite membrane obtained. This work provides a novel total heat exchange membrane with convenient production process, low cost and high durability characteristics.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2018
·
IF 3.909
Xiubin Hou,Zhixin Xue,Yanzhi Xia,Yimin Qin,Guofang Zhang,Hongwu Liu,Kechang Li
Agar/sodium alginate (AG/SA) nanocomposite films were prepared using solution casting method in presence of various concentrations of nano-SiO 2 (2.5, 5, 7.5, and 10 wt%). The effect of nano-SiO 2 concentration on the nanocomposite film was investigated. The result of Fourier transform infrared (FTIR) illustrated the formation of hydrogen bonding between nano-SiO 2 and polysaccharide . As nano-SiO 2 concentration rose from 0 to 10 wt%, the tensile strength and elongation at break all increased up to maximum, respectively. The tensile strength and elongation at break of film containing 10 wt% nano-SiO 2 increased by 65.29% and 60.38% respectively when compared to those of film prepared without nano-SiO 2 . The reason for enhancing in tensile strength might be related to the formation of molecular interaction . The film containing 2.5 wt% nano-SiO 2 had maximum water contact angle and minimum water vapor permeability among those of all films prepared in this work. However, the film containing 10 wt% nano-SiO 2 had minimum swelling degree and water solubility, further demonstrating the formation of strong interaction. The addition of nano-SiO 2 improved the properties of film against UV light and thermal stability . Overall, the addition of nano-SiO 2 enhanced the mechanical properties, water resistance and thermal stability of polysaccharide film.
研究领域:
材料科学
·
食品科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 24
·21089-21095
·
IF 2.195
Sun Fan,Chen Guixiong,Zhou Xiongtu,Wu Chaoxing,Sun Lei,Yan Qun,Guo Tailiang,Zhang Yongai
Thin-film encapsulation (TFE) is essential and challenging for flexible organic/quantum dot light-emitting diodes (OLEDs/QLEDs). In this work, SiO 2 nanoparticles were added into the NEA 121 polymer (s-NEA) to prolong the permeation pathways, showing good barrier property and high optical transparency. With increasing the concentration of SiO 2 nanoparticles up to 20 mg/ml, the value of water vapor transmission rate (WVTR) decreased. A single s-NEA layer with silica concentration of 20 mg/ml and thickness of ~ 75 µm exhibited WVTR of 2.5 × 10 −3 g/m 2 /day and light transmittance of above 80%. Al 2 O 3 thin films fabricated using atomic layer deposition were inserted between s-NEA layers to form dyad-style Al 2 O 3 /s-NEA multilayers. The Al 2 O 3 (60 nm)/s-NEA (20 µm) multilayers with 3 units exhibited WVTR of 2.6 × 10 −5 g/m 2 /day and consistently demonstrated a significantly extended QLED lifetime.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION
·
2013
·
IF 1.7
Anqiang Zhang,Lin Yang,Yaling Lin,Hecheng Lu,Yuanhuan Qiu,Yanlong Su
Supramolecular elastomer based on polydimethylsiloxanes (SESi) is a kind of novel elastomer cross-linked by the multihydrogen bonds supplied by the functional groups linked to the end of the PDMS chains, such as amide, imidazolidone, pending urea (1,1-dialkyl urea), and bridging urea (1,3-dialkyl urea). SESi showed lower glass transition temperature (T
g) at about −113 °C because of the softer chain of PDMS, and could show real rubber-like elastic behaviors and acceptable water vapor transmission rate under room temperature. The high biocompatibility of SESi in the form of films was demonstrated by the cytotoxicity evaluation (MTT cytotoxicity assay and direct contact assay), hemolysis assay, and skin irritation evaluation. Based on detailed comparisons between commercial Tegaderm™ film and SESi film using a full-thickness rat skin model experiment, it was found that SESi film showed similar wound contraction rate as that of Tegaderm™ film on day seven, 10, and 14; only on day five, SESi film showed a significant (p < 0.05) lower wound contraction rate. And, the wounds covered with SESi film were filled with new epithelium without any significant adverse reactions, similar with that of Tegaderm™ film.
研究领域:
材料科学
·
生物医学工程
·
皮肤病学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2017
·Vol. 25
·期 1
·463-471
·
IF 3.417
Long Keying,Cha Ruitao,Zhang Yapei,Li Juanjuan,Ren Fangping,Jiang Xingyu
Cellulose nanocrystals (CNCs) of excellent mechanical properties, high purity, high aspect ratio, and cost-efficient production have drawn many attentions as a new class of reinforcement nanofillers. We chose CNCs as reinforcement nanofillers, which were incorporated in collagen to prepare CNCs/collagen casings by a traditional extruding method. The effects of CNCs on these casings were investigated. The dispersity and compatibility of CNCs within the collagen are rather good. The presence of CNCs can improve the light transmittance, barrier property, tensile strength, Young’s modulus, and thermostability of the CNCs/collagen casings, where collagen might cross-link with CNCs by electrostatic and hydrogen bonding interaction. When the CNCs content is 4 wt%, the water vapor permeability of CNCs/collagen casing reaches the minimum of 0.18 g·mm/h·m 2 ·KPa. That concentration gave the highest light transmittance, and the mechanical properties were optimal. The development of CNCs/collagen casings represents an important potential to extend shelf life by the prevention of lipid oxidation and water loss of sausages.
研究领域:
材料科学
·
食品科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）