JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 36
·e54362
·
IF 3
Xiaosai Hu,Chenyang Wang,Haiyang Yu
Superabsorbent polymers (SAPs) are attracting more research interests in many fields mainly due to its distinguished water-absorbing performance. Among all the factors that severely affecting water absorption of SAPs, cross-linkers play a non-negligible role in shaping the stable cross-linked networks of SAPs. As for cross-linking agents, previous studies have focused on the chemical cross-linker as well as functional nanoparticle cross-linker. Though their corresponding SAPs can achieve high water uptake capacity, the sustainable development of such SAPs was still limited by the natural defects of these cross-linkers. Herein, we reported small-molecule sodium tungstate (STD) as one novel cross-linker to optimize water-holding capabilities of SAPs. STD shows a high affinity to polymeric chains mainly via multiple hydrogen bonding interactions. The resultant poly(acrylic acid)/STD SAP exhibited a satisfactory water-absorbing capacities with swelling ratios of 7527 g/g in distilled water, 95 g/g in 0.9 wt% NaCl solution and 2210 g/g in 3 wt% urea solution, respectively. In addition, such high water absorbency was achieved within SAP system just made up of a sole polymer and a sole cross-linker, implying that STD can be used as novel cross-linker to promote the green development of SAPs.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Chan Bai,Sufen Zhang,Lei Huang,Haiyan Wang,Wei Wang,Qingfu Ye
Starch , with properties of eco-friendliness and abundance, is one of the most important natural polymers. Starch-based hydrogels were investigated as carriers of carbendazim to combine controlled-release and water absorption (WA). Three carbendazim-loaded hydrogels (CLHs) with different WA capacities were prepared by solution polymerization. The CLHs were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and liquid-chromatography mass-spectrometry (LC–MS/MS). Release kinetics of CLHs was investigated using 14 C-labeling method. The diffusion parameters of CLHs were 0.47, 0.57 and 0.81 in deionized H 2 O (ddH 2 O). WA affected release profile significantly, the release longevity reaching 240 h when WA was 800 g/g in ddH 2 O. Solution pH influenced release profiles and the lowest release rate occurred in the lowest pH. Addition of CLH (1.3 g/kg soil) markedly increased water-holding capacity (WHC) of soil by 8.2%. The study indicated that starch-based CLH was a good controlled-release agent for carbendazim and water absorbent for soil.
研究领域:
农业科学
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材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Yan Hao,Jing Qu,Lei Tan,Zunyi Liu,Yicheng Wang,Tingrui Lin,Hui Yang,Jing Peng,Maolin Zhai
An eco-friendly superabsorbent polymer (SAP) was prepared by grafting 2-acrylamido-2-methyl-1-propanesulfonic acid onto microcrystalline cellulose in lithium chloride/ N, N -dimethylacetamide system. The synthesized SAP (cellulose- g -PAMPS) was characterized by FTIR, TGA , SEM, 1 H NMR, 13 C NMR and XRD. The water absorption equilibrium of cellulose- g -PAMPS could be achieved within 10 min in distilled water. Moreover, the maximum water absorption capacities of cellulose- g -PAMPS in distilled water, 0.9 wt% NaCl solution and 3.2 wt% Na 2 CO 3 solution were 648.9, 298.4 and 207.3 g·g −1 , respectively. The water absorption behavior of cellulose- g -PAMPS was interpreted by the pseudo-second-order model. Furthermore, cellulose- g -PAMPS could be used in some extreme conditions due to its high acid and alkali resistance. The water retention rate of cellulose- g -PAMPS could be maintained above 90 % at 25 °C for 6 h. As a consequence, the synthesized SAP can be applied to increase the plant growth and survival time under drought conditions, even under saline alkali conditions.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2016
·Vol. 133
·期 20
·
IF 1.866
Shaoping Qian,Kuichuan Sheng,Wenchao Yao,Hui Yu
In this study, ultrafine bamboo-char (BC) was introduced into poly(lactic acid) (PLA) matrix to improve mechanical and thermal properties of PLA based biodegradable composites. PLA/BC biocomposites were fabricated with different BC contents by weight. Uniform dispersion of BC in the PLA matrix and good interaction via physical and chemical interfacial interlocks were achieved. The maximum tensile strength and tensile modulus values of 14.03 MPa and 557.74 MPa were obtained when 30% BC was used. Impact strength of the biocomposite with 30% BC was increased by 160%, compared to that of pure PLA. DSC analysis illustrated that PLA/BC biocomposites had a better thermal property. Crystallization temperature decreased and maximal crystallinity of 30.30% was observed with 30% BC load. We did not notice significant thermal degradation differences between biocomposites with different BC loadings from TGA. Better water resistance was obtained with the addition of BC. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133 , 43425.
研究领域:
材料科学
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生物材料
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2020
·
IF 3.99
Yiming Zhao,Yonggan Yan,Xin Cui,Xunwei Wu,Hui Wang,Jun Huang,Xiaoyong Qiu
The rapid development of flexible electronics motivates the design and synthesis of stable hydrogels that possess good stretchability and conductivity under harsh environment. The long-term durability of traditional hydrogels generally fails at high temperatures. In this work, a high-temperature-tolerant, self-healable hybrid hydrogel showing excellent water-locking and adhesive properties was developed through ultraviolet curing of acrylamide (AM) and hyper-branched polyethyleneimine (PEI) in highly salted ethylene glycol-water solution. Ethylene glycol was used as a crystallization inhibitor and greatly enhanced the solubility of sodium acetate (NaAc). The fabricated hydrogel can retain 75 % of its initial weight for 9 hours at 100 °C or 88 % of its initial weight for 77 hours at 15 % relative humidity (RH) environment. The dehydrated gel was flexible (tensile strain > 1700 %) and conductive after storing at high temperatures (e.g. 100 °C) for a long term. Moreover, the highly salted hydrogel showed remarkable water adsorbing ability in the air: it can recover to its original weight after losing water at high temperature or low humidity conditions. In addition, the separated hydrogel fragments could heal into a single piece in 30 s, and the hydrogel showed reversible adhesiveness to both organic (6.2 kPa for pigskin, 28 kPa for wood) and inorganic (111.9 kPa for glass, 135.5 kPa for iron) substances for at least 5 cycles. This work provides a facile way of obtaining multi-functional conductive hydrogels that can work at high temperatures, demonstrating long-term prospects in engineering applications.
研究领域:
材料科学
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生物医学工程
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Shuai Chi,Xinyu Liu,Jiaqing Wu,Qian Feng,Lili Wang,Jianrong Li,Tong Sun
The natural high molecular polysaccharide Artemisia sphaerocephala Krasch gum (ASKG) was introduced into Polyvinyl alcohol (PVA) and Sodium alginate (SA), and the hydrogels with excellent absorbent properties were prepared by crosslinking method. The hydrogel form porous network structures through esterification of CA with PVA and ASKG, and chelation of Ca 2+ and SA. The water absorption, water retention, porosity and thermal stability of hydrogels are improved by ASKG. The higher the concentration and addition of cross-linking agent, the lower the water absorption rate of the hydrogels and the denser pore structure. When PVA is more than SA, the hydrogel has the best mechanical properties, and when SA is more than PVA, the hydrogel has porous network structure. The water absorption kinetics of the hydrogels conform Schott second-order kinetic model, indicating that the water absorption is a simple diffusion behavior. The 5P-5S-6 A-1C-0.025Ca 2+ hydrogel pad effectively adsorb fish fillet exudates, maintain the cleanliness of the fish fillets, inhibit the growth of microorganisms and protein oxidation due to wonderful water absorption, so the shelf life of the fillets is extended from 6.8 days to 9.1 days. Therefore, this study can provide technical guidance and theoretical support for the development of fresh food packaging materials.
研究领域:
食品科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2015
·
IF 4.074
Xiancai Jiang,Yulai Zhao,Linxi Hou
The AlCl 3 ·6H 2 O aqueous solution was used to dissolve chitosan (CS) and the CS/poly(vinyl alcohol) (PVA) blend films were prepared at the absence of acetic acid. AlCl 3 ·6H 2 O was retained in CS/PVA film and glycerol was added to form the complex plasticizer with AlCl 3 ·6H 2 O. The effect of glycerol on the water sorption , crystalline, thermal and mechanical properties of AlCl 3 ·6H 2 O doped CS/PVA film was studied by atomic force microscopy , X-ray diffraction, thermal gravity analysis and tensile testing, respectively. The experimental results showed that glycerol had a significant positive effect on the properties of AlCl 3 ·6H 2 O doped CS/PVA films. With the synergism effect of AlCl 3 ·6H 2 O and glycerol, the prepared CS/PVA films showed excellent mechanical properties. With the addition of 30 wt% glycerol, the AlCl 3 ·6H 2 O doped CS/PVA films behave the tensile strength of 39 MPa and elongation at break of 120%, respectively.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 6
·1448
·
IF 3.1
Chunhui Shi,Xifeng Lv,Jingfan Peng,Jikui Zhu,Fengqin Tang,Libing Hu
Although humic acids (HAs) have been used to prepare absorbent hydrogels, their applications in many areas, such as agriculture, wastewater treatment and hygienic products, are not satisfactory due to their low solubility in organic solvents. In this work, biochemical fulvic acid (BFA), as a kind of HA, was initially methylated for preparation of the methylated BFA (M-BFA), which contributed to enhancing the solubility in organic solvents. Then, M-BFA reacted with N,N′-methylenediacrylamide(MBA) in the N,N-Dimethylacrylamide (DMAA) solution, and the expected hydrogel (M-BFA/DMAA) was successfully obtained. XPS confirmed that there were more C=O and C-N groups in M-BFA/DMAA than in DMAA; thus, M-BFA/DMAA was able to offer more reactive sites for the water adsorption process than DMAA. The combined results of BET and SEM further demonstrated that M-BFA/DMAA possessed a larger BET surface area, a larger pore volume and a more porous structure, which were favorable for the transfer of water and accessibility of water to active sites, facilitating water adsorption and storage. In addition, the swelling ratio and water retention were investigated in deionized (DI) water at different conditions, including test times, temperatures and pHs. Amazingly, the swelling ratio of M-BFA/DMAA was 10% higher than that of DMAA with the water retention time from 100 to 1500 min. Although M-BFA/DMAA and DMAA had similar temperature sensitivities, the pH sensitivity of M-BFA/DMAA was 0.9 higher than that of DMAA. The results proved that M-BFA/DMAA delivered superior water retention when compared to the pristine DMAA. Therefore, the resultant materials are expected to be efficient absorbent materials that can be widely used in water-deficient regions.
研究领域:
材料科学
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环境科学
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农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2025
·
IF 4.8
Liu Yutong,Wang Hankun,Zhong Tuhua
In this study, micro-nanofibrillated cellulose (MNFC) was prepared using an environmentally friendly approach. Specifically, bamboo pulp was pretreated through high-consistency mechano-enzymatic fibrillation, followed by high-speed blending and dispersion, resulting in MNFC with a diameter of 9.77 ± 3.83 nm and a water retention capacity of up to 1207%. The prepared MNFC was utilized as a reinforcing material for poly(acrylic acid-acryloylamino-2-methyl-1-propanesulfonic acid) P(AA-AMPS) hydrogels, aiming to enhance their mechanical properties and water absorption capacity. The effects of incorporating high-content MNFC on the mechanical and water absorption properties of the hydrogels were investigated. The results demonstrated that, compared to hydrogels without MNFC, the addition of MNFC led to a more uniform material structure, with the hydrogel fully recovering its original shape after 80% compressive deformation. The incorporation of 5% MNFC increased the compressive stress strength of the P(AA-AMPS) hydrogel by tenfold, while the addition of 15% MNFC improved the water absorption rate by 68% and the initial water retention capacity by 3.4 times. More importantly, compared to traditional low consistency nanocellulose production methods, the MNFC preparation method in this study is more environmentally friendly and efficient, offering a cost-effective alternative. The introduction of high-content MNFC not only increases the proportion of biomass materials in the hydrogel, reducing reliance on petroleum-based materials, but also constructs a robust network structure, significantly enhancing the mechanical strength and water absorption performance of the hydrogel. These P(AA-AMPS) hydrogels, reinforced with high-content MNFC and exhibiting excellent mechanical properties and ultra-high water absorption capacity, show great potential for applications in agriculture, hygiene, and the food industry. Graphical abstract
研究领域:
材料科学
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环境科学
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生物工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
·
2011
·
IF 3.044
Huanan Li,Jing Yang,Xiaona Hu,Jie Liang,Yujiang Fan,Xingdong Zhang
To accomplish ideal wound dressing, hydrogels based on a natural polysaccharide, pullulan were synthesized by chemical cross-linking. The tensile strengths of the hydrogel films (1 mm thick) were determined to range from 0.663 to 1.097 MPa in proportion to cross-linking degrees and water contents. The swelling study of the hydrogels in water showed remarkable water absorption property with swelling ratio up to 4000%, which provided the hydrogel with quick hemostatic ability and prevent the wound bed from accumulation of exudates. The water vapor transmission rate and water retention of the hydrogels were found to be in the range of 2213–3498g/m 2 /day and 34.74–45.81% (after 6 days), indicating that the hydrogel can maintain a moist environment over wound bed, which could prevent the dehydration of the wound bed and prevent the scab formation. Biocompatibility test revealed that the hydrogels were not cytotoxic. The hydrogel could load antimicrobial agents and effectively suppress bacterial proliferation to protect the wound from bacterial invasion. These results suggest that the pullulan hydrogels prepared in this study may have high potential as new ideal wound-dressing materials. © 2011 Wiley Periodicals, Inc. J Biomed Mater Res Part A:, 2011.
研究领域:
生物材料学
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医学工程
·
药剂学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2020
·
IF 5.278
Yanmin Shen,He Wang,Zijun Liu,Weikun Li,Yuhua Liu,Jingjing Li,Hongliang Wei,Huayun Han
A new type of water-retaining, slow-release fertilizer (WSF) based on double-network hydrogels was fabricated via the ion-crosslinking of sodium carboxymethyl cellulose and the free radical polymerization of polymerizable β-cyclodextrin (MAH-CD), polyethylene glycol dimethacrylate (PEGDA), acrylamide (AM), and acrylic acid (AA) with urea-loaded halloysite as an additive. The effects of the AM to AA monomer ratio, the halloysite content, the AlCl 3 content and the MAH-CD content on the swelling ratio were studied. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA) were applied to characterize the structure and properties of the WSF. The swelling behavior and water retention capacity of the fertilizer were investigated using a classic gravimetric method. The experimental results indicated that the presence of halloysite nanotubes clearly adjusted the swelling and release properties of the WSF. Kinetic modeling indicated that the swelling mechanism and slow release behavior were consistent with a Fickian diffusion mechanism. Form the considerations of its properties and raw materials, the fertilizer developed here has a good prospect of application and extension.
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CONTROL
·
2024
·
IF 5.6
Fangqu Wang,Zipeng Xu,Lin Chen,Ziyan Qiao,Yayun Hu,Xiaojing Fan,Yaping Liu,Zhuangli Kang,Feng Huang,Minyi Han,Huijuan Yang,Xianchao Feng
In order to better showcase the freshness of fresh meat, merchants usually place absorbent pads under tray packaging for preservation. However, the current absorbent pads can only absorb a small amount of blood water and cannot effectively inhibit the growth and reproduction of microorganisms in tray packaging. Herein, a super absorbent aerogel pad for preserving fresh meat was prepared through the Schiff base reaction. Benefiting from the superhydrophilicity and porous structure of aerogels, the prepared G3D1BC0.5 (Gelatin: Dialdehyde starch = 3:1, Bacterial cellulose : 0.5%) aerogel not only possessed excellent adsorption performance but also rapidly regain their shape under 70% compression strain. The G3D1BC0.5 aerogel incorporating curcumin (Cur) showed the good antibacterial ability where the survival rate of Listeria monocytogenes , Staphylococcus aureus , Escherichia coli and Salmonella typhimurium significantly decreased to lower than 45% with the increase of Cur content ( P < 0.05). Furthermore, the prepared aerogels had the excellent preservation effect on fresh meat during storage. The G3D1BC0.5-Cur0.7 aerogels can extend the shelf-life of fresh pork to 12 days by inhibiting microbial growth , protein oxidation, and lipid oxidation. Therefore, the prepared aerogel in the present study had great potential for preservation of fresh pork.
研究领域:
食品科学
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材料科学
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微生物学
✓ 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）