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
·
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 48
·46892
·
IF 1.901
H.L. Guan,D.L. Yong,M.X. Fan,X.L. Yu,Z. Wang,J.J. Liu,J.B. Li
The superabsorbent resin (SAR) containing sodium humate (SH) has been synthesized by free-radical graft copolymerization with acrylic acid, 2-acrylamido-2-methylpropane sulfonic acid, and SH as monomers in aqueous solution, using N,N ′-methylenebisacrylamide as crosslinking reagent and potassium persulfate as initiator. The structure and morphology of the as-prepared SARs were fully characterized by Fourier transform infrared , scanning electron microscopy and thermogravimetric analysis, respectively. Meanwhile, the effects of crosslinking reagent, initiator, SH, and neutralization degree on the water absorbency of SAR were studied. The results showed that the adding of SH in the SAR enhanced the salt-tolerating and moisture-resisting capacities obviously. The SAR without SH [poly(acrylic acid) (PAA)/2-acrylamido-2-methyl-1-propanesulfonic (AMPS)] showed a maximum water absorbency of 600 g g −1 in distilled water and 60 g g −1 in 0.9 wt % NaCl solution, while SAR modified by SH (PAA/AMPS/SH) exhibited the maximum water absorbency of 1380 g g −1 in distilled water and 117 g g −1 in 0.9 wt % NaCl solution. Furthermore, the moisture-resisting capacity of PAA/AMPS/SH decreases to 8 wt % compared with PAA/AMPS. PAA/AMPS/SH also has better water absorbency in different cation solutions. The results indicated that the introduction of SH could enhance the performance of SAR obviously. The possible reasons with this enhancement were also investigated. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46892.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 10
·1168
·
IF 2.935
Xuehua Liu,Rue Yang,Mingcong Xu,Chunhui Ma,Wei Li,Yu Yin,Qiongtao Huang,Yiqiang Wu,Jian Li,Shouxin Liu
In this work, we applied a fast and simple method to synthesize cellulose nanocrystal (CNC) aerogels, via a hydrothermal strategy followed by freeze drying. The characteristics and morphology of the obtained CNC-g-AA aerogels were affected by the hydrothermal treatment time, volume of added AA (acrylic acid), and the mass fraction of the CNCs. The formation mechanism of the aerogels involved free radical graft copolymerization of AA and CNCs with the cross-linkerN,N′-methylene bis(acrylamide) (MBA) during the hydrothermal process. The swelling ratio of the CNC-g-AA aerogels was as high as 495:1, which is considerably greater than that of other polysaccharide-g-AA aerogels systems. Moreover, the CNC-g-AA aerogels exhibited an excellent methyl blue (MB) adsorption capacity and the ability to undergo rapid desorption/regeneration. The maximum adsorption capacity of the CNC-g-AA aerogels for MB was greater than 400 mg/g. Excellent regeneration performance further indicates the promise of our CNC-g-AA aerogels as an adsorbent for applications in environmental remediation.Keywords:cellulose nanocrystals;hydrothermal;aerogels;superabsorbent
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
Gels
·
2023
·Vol. 9
·期 5
·380
·
IF 4.6
Ying Qin,Hao Li,Hai-Xia Shen,Cai-Feng Wang,Su Chen
Hydrogels have received increasing interest owing to their excellent physicochemical properties and wide applications. In this paper, we report the rapid fabrication of new hydrogels possessing a super water swelling capacity and self-healing ability using a fast, energy-efficient, and convenient method of frontal polymerization (FP). Self-sustained copolymerization of acrylamide (AM), 3-[Dimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azaniumyl]propane-1-sulfonate (SBMA), and acrylic acid (AA) within 10 min via FP yielded highly transparent and stretchable poly(AM-co-SBMA-co-AA) hydrogels. Thermogravimetric analysis and Fourier transform infrared spectroscopy confirmed the successful fabrication of poly(AM-co-SBMA-co-AA) hydrogels with a single copolymer composition without branched polymers. The effect of monomer ratio on FP features as well as porous morphology, swelling behavior, and self-healing performance of the hydrogels were systematically investigated, showing that the properties of the hydrogels could be tuned by adjusting the chemical composition. The resulting hydrogels were superabsorbent and sensitive to pH, exhibiting a high swelling ratio of up to 11,802% in water and 13,588% in an alkaline environment. The rheological data revealed a stable gel network. These hydrogels also had a favorable self-healing ability with a healing efficiency of up to 95%. This work contributes a simple and efficient method for the rapid preparation of superabsorbent and self-healing hydrogels.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Pan Gou,Yuanli Xiang,Lin Ye,Sijiang Liu,Xiaowen Zhao
Superabsorbent resins (SARs) have been developed to improve water management in agriculture. Injectable SARs offer significant potential for enhancing plant growth by penetrating deeply into the soil prior to gelation; however, relevant research remains scarce. In this study, injectable starch-based SARs were synthesised via a straightforward two-step process. Initially, hydrophilic polar groups were grafted onto the starch backbone, followed by crosslinking with pentaerythritol tris [3-(1-aziridinyl) propionate] (PTAP). This approach conferred both injectability and underwater gelation capabilities to the system. By adjusting the starch content, the time required for the gelation precursor to reach clogging and gelation points was significantly extended. Additionally, the effective injection ratio was enhanced, and macromolecular diffusion into water was inhibited, resulting in excellent injectability. The equilibrium swelling ratio of the resin reached 517.62 g/g with high water retention ratio. Because the contact angles of the gelation precursor on wood, glass, and aluminium surfaces were lower than those of water, it effectively displaced interfacial water, enabling strong underwater adhesion to the substrates. The gelation precursor effectively penetrated the crevices of wet sandstone and adhered the fragments without dispersal, highlighting its potential for applications in agricultural water retention and sandstone stabilisation.
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Yasen Li,Cheng Zhang,Tingzhong Li,Guoxing Sun
This study investigates the impact of the chemical composition of superabsorbent polymers (SAPs) on their effectiveness in internal curing within high-performance cementitious materials. Although the use of commercial SAPs in cementitious systems has been widely researched, there is still no consensus on how different SAP structures influence material properties. For the first time, this research employs photoinitiated free radical polymerization technology to synthesize three structurally distinct SAPs: SAP with sulfonic acid groups (PAMPS), SAP with amide groups (PAM), and SAP with carboxyl groups (PAAs). The effects of these SAPs on the cement hydration process and microstructure were examined by analyzing their water absorption behavior in cement filtrate. The residual cation content on the SAP surface was evaluated using EDS, while XRD and TGA were used to study how SAP structure affects cement hydration products. Furthermore, the impact of these SAPs on the strength and autogenous shrinkage of the material was investigated. The results indicate that PAMPS, with its sulfonic acid groups, exhibited stable water absorption performance in the alkaline cement environment, promoting hydration reactions and increasing the formation of needle-shaped C-S-H. This stability contributed to mitigating the negative effects on mechanical properties. While the inclusion of SAPs generally reduced the strength of the cement matrix, PAMPS was the most effective in mitigating autogenous shrinkage, achieving a shrinkage mitigation efficiency of 86 %. These findings highlight the importance of SAP chemical structure in influencing cement hydration and material performance, offering insights for the development of effective internal curing agents to enhance high-performance concrete.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2020
·Vol. 28
·期 10
·2702-2709
·
IF 2.572
Yu Xianglin,Cheng Kai,Xiang Yu,Mei Hua,Wang Jiapei,Li Junbo
A superabsorbent resin (SAR) with good degradability was prepared with acrylic acid (AA), acrylamide (AM), 2-acrylamido-2-methylpropane sulfonic acid (AMPS), organic montmorillonite (OMMT) and titanium dioxide (TiO 2 ) through inverse suspension polymerization, using potassium persulfate (KPS) as initiator and N,N-methylenebisacrylamide (MBA) as crosslinker. The structure and micrographs of the SAR were fully characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction (XRD). Meanwhile, the effects of major factors such as initiator, crosslinker, OMMT and TiO 2 contents and the oil–water ratio on liquid absorbency were investigated, which reached 769.3 g/g in distilled water and 91.1 g/g in 0.9wt% NaCl solution, respectively. The equilibrium degradation performances were evaluated under the optimum conditions by the mass loss of the SAR in the soil and under the ultraviolet light, which reached 32.3wt% after 120 days and 83.9wt% after 40 h, respectively. The introduction of OMMT promoted the photodegradability obviously. The maximum photodgradation of PAA/TiO 2 SAR reached 74.3wt% after 60 h, which was lower than the PAA/OMMT/TiO 2 SAR. The degradable SAR has an encouraging potential for agricultural and forestry applications.
研究领域:
材料科学
·
环境科学
·
农业科学
✓ 已验证
产品关联
DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2019
·
IF 5.618
Peihua Zhong,Mateusz Wyrzykowski,Nikolajs Toropovs,Lei Li,Jiaping Liu,Pietro Lura
This study investigates the absorption behavior of superabsorbent polymer (SAP) with different chemical structures and their effect on cement hydration , early-age autogenous shrinkage and mechanical properties of cement paste . SAP with high density of anionic functional groups absorbed the cement pore solution quickly, and then released it because the anionic groups on the network of SAP complexed with multivalent cations in the pore solution (e.g., Ca 2+ ). Much less release was measured for SAP with low density of anionic groups. Furthermore, SAP with either both anionic and cationic groups or with only non-ionic groups did not release the liquid. Despite their different behavior in solutions, all SAP were able to counteract autogenous shrinkage. SAP with either both ionic groups or high density of anionic groups showed excellent internal curing effect. The internal curing had no negative effect on the compressive strength of the paste when the total cement-to-water ratio was considered.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COMPOSITE MATERIALS
·
2015
·
IF 1.173
Guofu Ma,Feitian Ran,Enke Feng,Zhe Zhang,Ziqiang Lei
A novel, low-cost, and eco-friendly organic–inorganic composite superabsorbent is successfully prepared in aqueous solution by graft copolymerization of partially neutralized acrylic acid (AA), polyvinyl alcohol (PVA), and attapulgite (APT) using ammonium persulfate (APS) as an initiator and N,N-methylenebisacrylamide (MBA) as a crosslinker. The structure and morphology of the composite superabsorbent are characterized by means of Fourier transform infrared, X-ray diffraction, field-emission scanning electron microscopy, and transmission electron microscopy. The effects of APT content which can affect the water absorbency and the pH, ionic surfactants and different saline solution which can affect swelling capabilities of the composite superabsorbent are also investigated. The results show the composite superabsorbent give the best absorption up to 680 g/g and 53 g/g in distilled water and 0.9 wt% NaCl solution, high water absorbency over a wide pH range of 4–10, high swelling capacity in anionic surfactant than that of cationic solution, which makes it promising for potential applications in modern agriculture and horticulture. On the other hand, the composite superabsorbent can be used for removing multivalent metal ions.
研究领域:
材料科学
·
环境科学
·
农业科学
✓ 已验证
DOI
高影响因子
Case Studies in Construction Materials
·
2024
·
IF 6.5
Ang Su,Yujiang Wang,Rui Wang,Yang Chu,Wen Xu,Qian Tian,Sen Yao,Qingyu Meng,Wenbin Wang
Internal curing is an effective method to reduce the autogenous shrinkage of cementitious materials. Besides, the increasing in relative humidity (RH) due to the internal curing also reduces the coefficient of thermal expansion (CTE), which is beneficial for enhancing the anti-cracking performance of cementitious materials. In this paper, effects of superabsorbent polymers (SAP) on the microstructure and performance of cementitious materials were investigated. The superabsorbent polymer (SAP) changes the time and spatial distribution of water in cementitious materials, so it should have an influence on the microstructure of cement matrix, thus affecting the performance of cementitious materials. Results indicate that the CTE of concrete increases over time, while that of concrete with SAP shows a completely different behavior. In 0.1 % SAP system, the CTE increases slowly over time after about 2days, while in 0.2 % SAP and 0.3 % SAP systems, the CTE is nearly stabilized during the test period. Low-field nuclear magnetic resonance (LF NMR) results indicate that the SAP decreases the number of empty capillary pores and increases the total porosity, which inhibits the increase of CTE over time. The dosage of SAP plays an important role in enhancing the internal curing performance. By increasing the dosage of SAP, the number of empty capillary pores decreases, the saturation degree of capillary pores rises, and consequently, the CTE and autogenous shrinkage of concrete are reduced.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER BULLETIN
·
2024
·
IF 3.1
Yu Kun,Liu Jiangrong,Li Huiting,Li Bing,Guo Jianzhong
Superabsorbent hydrogels demonstrate positive significance as water-retaining materials in agriculture and gardens. The super water-retaining hydrogel (BASA) based on the bamboo powder with the rich sulfonic acid group and carboxyl group was successfully and efficiently synthesized by ultrasonic wave-assisted and polymerization methods. The preparation process has the advantages of mild conditions and process simplification. The impact of reaction conditions (the ionic strength, pH value, cross-linking agent and initiator content) was systematically studied. Characterization methods such as elemental analysis, FTIR, SEM and TGA indicated that the synthesized super water-retaining agent had excellent water retention properties and good stability. The maximal absorbent capacities in ultrapure water and rainwater reached 1047 g g −1 and 952 g g −1 , respectively. The water retention properties of BASA were affected by the water quality and ionic strength of water solution. The swelling process is mainly the hydrogen bonding between the active group and the hydrogen atom of the water molecule and the electrostatic interaction of anionic groups such as sulfonic acid groups, but it also includes the synergistic effect of diffusion process. The outcomes demonstrate that BASA is a powerful water absorption hydrogel for soil water retention agent in the agricultural field.
研究领域:
农业科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CEMENT AND CONCRETE RESEARCH
·
2025
·
IF 13.1
Yasen Li,Cheng Zhang,Yangyang Xiang,Yanru Chen,Tingzhong Li,Honghai Cui,Guoxing Sun
Superabsorbent polymers (SAPs) are widely studied as internal curing agents in high-performance concrete, but their adverse effects on pore structure remain a challenge. This study introduces an innovative cement-integrated SAP (CiSAP) by modifying the interface, using KH570-modified cement (KMC) as the functional core. By optimizing KMC content, the microstructure was improved, leading to enhanced performance. Structural characterization confirmed that KMC was successfully embedded into the polymer network. CiSAP30 reduced shrinkage by 61.4 % due to its excellent desorption efficiency. The 28-day strength retention of CiSAP in cement-based materials varied from 93.4 % to 99.6 %, compared to the reference group without CiSAP. MIP and fractal dimension analysis indicated that CiSAP refined the microstructure by reducing large capillary pores and filling macropores. The sustained water release from CiSAP, along with KMC hydration, promoted long-term densification and controlled autogenous shrinkage. This study provides a novel strategy for designing internal curing agents for high-performance cement-based materials.
研究领域:
土木工程
·
材料科学
✓ 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）