FOOD HYDROCOLLOIDS
·
2024
·
IF 11
Jia Kong,Mingyue Shen,Weidong Zhang,Gang Wang,Jieqiong Lin,Huiliang Wen,Jianhua Xie
The Chinese traditional dessert “Black Bean Jelly” is a gelatinous food, formed mainly by the interaction of Mesona chinensis polysaccharide (MCP) and starch. In this study, the changes in rice starch (RS)-MCP composite gels during the gelatinization process were investigated. The results showed that the addition of MCP promoted the gelatinization of starch, leading to a decrease in the pasting temperature of starch, while the gelatinization enthalpy exhibits a trend of initially increasing and then decreasing. Furthermore, MCP increased the particle size and irregularity of starch, with the D50 value and the difference between D [4, 3] and D [3, 2] both increased. Elevated temperatures resulted in an increase in swelling power (SP), causing starch granules to swell and rupture significantly. Additionally, at a constant temperature, an increase in MCP concentration caused the aggregation of starch granules. The binding of MCP to amylose was crucial for gel formation, MCP decreased the content of leached amylose and enhanced the degree of binding between RS and MCP. Gaussian fitting results suggested that the strength of the intermolecular hydrogen bonding between MCP and RS was strengthened with MCP addition. Moreover, MCP promoted the transformation of free water to bound water. This study offers theoretical insights into the formation of MCP-starch-based gel products.
研究领域:
食品科学
·
生物化学
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产品关联
DOI
高影响因子
Biomaterials Science
·
2024
·
IF 5.8
Hui Zhi,Yingxi Qin,Yang Li,Fengya Wang,Liang Feng
As water-saturated polymer networks, the easy water loss of hydrogels directly affects their end-use applications. Minimizing the ratio of free water and increasing the ratio of bound water in the gel system has become key to extending the service life. In this work, an ionogel is prepared that effectively regulates the proportion of free water and bound water through the formation of wrinkle angles by the hydrophilic and hydrophobic chains in the gel system and the non-volatile nature of the ionic liquid. Acrylamide and N-acryloyl phenylalanine are used as free radical comonomers, and phenol red is used as an acid–base indicator. The ionic liquid is used as a dispersant to stabilize the whole framework. Due to the hydrogen bonding interactions, electrostatic interactions, and ion–ion interactions, the ionogel exhibits good stretchability, adhesion, pH sensitivity, and stability. The ionogel can be stretched in multiple directions without cracking and can be bent 180° after being left in air for 45 days. Assembling the ionogel into a wearable device can effectively monitor the pH value of sweat during exercise. The detection results are displayed in the form of RGB values, providing a preliminary diagnosis of the health of the human body.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2018
·
IF 3.789
Bang Liang,Guangyu Zhang,Zhenxing Zhong,Yan Huang,Zhaohui Su
In this work, an anti-icing coating based on superhydrophilic polyzwitterion brushes is reported. Poly(sulfobetaine methacrylate) (PSBMA) brushes were synthesized by surface-initiated atom-transferred radical polymerization to create superhydrophilic films on silicon wafers. The thickness of the PSBMA brushes film increased linearly with the polymerization time, and the film remained superhydrophilic in a nonassociated state when the thickness was less than ∼100 nm. DSC and FTIR analyses revealed that PSBMA contains more nonfreezable bound water than typical polyelectrolytes such as poly(sodium styrenesulfonate) and poly(2-(methacryloyloxy)ethyltrimethylammonium chloride), leading to lower ice adhesion strength than the latter two. At −20 °C, the PSBMA brushes coating demonstrated low ice adhesion strength of 60 kPa, showing a significant reduction in ice adhesion by up to ∼75% compared to uncoated silicon wafer. The optimum PSBMA layer thickness for low ice adhesion was ∼100 nm. These findings suggest that polyzwitterions are excellent candidates for anti-icing coating application.
研究领域:
材料科学
·
表面化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Miaomiao Ma,Yuhong Qi,Zhanping Zhang
Polyethylene glycol (PEG) is widely utilized in marine antifouling materials; thus, the fundamental understanding of PEG characteristics in seawater is indispensable. Herein, a “membrane-seawater” separation chamber model is designed, and the molecular dynamics (MD) method is used to simulate the swelling process of PEG membranes in seawater; two characteristic lengths are developed from the concept of Gibbs surface to illustrate the relationship between seawater ions and PEG membranes; the amount of bound water in the hydration shell of PEG is calculated by experimental method. It is concluded that the water content of the PEG membrane in seawater is not much different from that of swelling in water; only the swelling rate changes; the seawater ions accelerate the swelling of the PEG membrane, but most gathered in the outer layer of PEG membrane; Ions change the distribution structure of the hydration layer, and the bound water of PEG decreases under the action of seawater ions. Moreover, the structure of the PEG chain in seawater has a change of “helix-ring”. The study of PEG in seawater will provide an effective supplement and theoretical basis for the modification design of PEG coating.
研究领域:
材料科学
·
分子动力学
·
海洋科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2025
·
IF 2.9
Qin Yu,Siyu Hou,Mengrong Hu,Zheng Li,Jian Luo
Poly(vinyl alcohol) (PVA) films have been widely used as flexible matrixes in advanced optical materials. Most studies concern the rigidification strategy of PVA films, while the physicochemical properties of inside bound water are ignored. In this study, we have employed lumichrome as the fluorescent probe to explore the acid–base property of bound water, which was demonstrated to exhibit an enhanced proton-accepting ability than bulk water, evidenced by the promoted deprotonation of lumichrome in the ground state. Decreasing the water content in a PVA film is demonstrated to further improve the proton-accepting ability. Different from that in bulk solution, a selective prototropism of lumichrome is determined in PVA films, which is induced by the formation of an anchored lumichrome–PVA complex through three hydrogen bonds. This work first points out the enhanced proton-accepting ability of bound water in PVA films, opening a new avenue for the development of flexible optical materials based on proton transfer.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Zheng Zhe,Wang Yong-Sheng,Wang Miao,Zhao Guo-Hua,Hao Guang-Ping,Lu An-Hui
Removal of confined space carbon dioxide (CO 2 ) that is in low concentration and with coexisting water is necessary but challenging by physical adsorption method. To make the removal process effective, rendering the nanopore surface hydrophobic to resist water is the popular way. Instead of preventing water from occupying the nanopores, in this work, we propose to utilize the guest water for the spatially selective formation of local surface bound water and further induce the preferential CO 2 capture. We observe an anomalous enhancement of CO 2 capture performance under humid conditions over carbon nanopores with spatially selective polar sites. It is evidenced that the surface bound water is formed at non-CO 2 -selective areas of polar carbon nanopores, thus creating additional CO 2 trapping sites. This work may inspire the design of environment tolerable materials for molecular separation and purification under harsh conditions.
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
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yue Hu,Yangyi Yu,Jingxiang Sun,Wen Yan,Hanya Xie,Ya Xiong,Shuanghong Tian,Jinxi Feng
With an intention to find new green-effective catalytic conditioners of sludge treatment, MgO nano-powders with preferential exposure facet (110) or (100) were prepared as sludge conditioners of sludge for the first time. The synthesized MgO nano-powders significantly enhanced the dewaterability and filterability of sludge which were highly sensitive to facet exposure. The Disintegration degree (DD) of sludge treated with MgO(110) reached 41.6 %, while that with MgO(100) and commercial MgO was only 35.7 % and 27.7 %, respectively. Boosting catalytic conditioning effect of (110) facet exposure was mainly ascribed to strong adsorption of O 2 in the Pauling-type mode by low coordination sites. Theoretical calculation indicated that its adsorption energy of O 2 reached was 4.5 folds that of MgO(100). The adsorption mode and high energy facilitated the generation of 1 O 2 as a key initial reactive oxygen species (ROS), leading to the effective conversion of bound water into free water. These findings provided a methodological reference for developing alternative catalytic conditioners through facet engineering to promote sludge dewatering and reduction.
研究领域:
环境科学
·
环境工程
·
化学工程
·
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2018
·Vol. 9
·期 1
·1-9
·
IF 12.353
Xi Guan,Sheng Lan,Du Jiahui,Zhang Jinyan,Li Minjie,Wang Hongze,Ma Yufei,Zhang Sean Xiao-An
The colour of water-jet rewritable paper (WJRP) is difficult to be expanded via single hydrochromic molecule, especially black. Here, inspired by the amazing phenomenon of bound-water in cells enabling various biological transformations via facilitating synergistic inter-/intra-molecular proton transfer, we present a simple strategy toward WJRP based on binary systems containing less-sensitive acidochromic dyes and mild proton donors (or developers). With such a binary system containing commercial black dye as the colouring agent, benzyl 4-hydroxybenzoate as the developer, and biomimetic bound-water as proton-transferring medium, we successfully achieve the long-awaited black WJRP. Printed images on such WJRP have excellent performances and long retaining time (>1 month). In addition, the robustness, durability and reversibility of WJRP could be increased distinctly by using polyethylene terephthalate as substrate. This strategy significantly expands hydrochromic colours to entire visible range in an eco-friendly way, which opens an avenue of smart materials for practical needs and industrialization.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Zhenyu Wang,Zhu Tu,Lulu Lu,Zefeng Wang,Minghua Yang
The addition of the surfactant can greatly reduce the moisture content of the sludge. But little research has been done on the synthesis of surfactants and the mechanism of dehydration. Thus, a novel cationic surfactant ZWY-28 with higher surface activity and more surface charge was investigating for sludge dewatering in this research. Results showed that when the content of ZWY-28 was 1% (0.14 g/L), the specific resistance to the filtration of sludge had a minimum value of 2.04 × 10 12 m/kg, the moisture content of the dehydrated sludge cake reached a minimum of 78.9%, the bound water reduced to 6.32 g/g, decreased by 39.2%. What’s more, the ZWY-28 is extremely helpful in releasing Extracellular polymers substances from sludge, lead to the removal of bound water, which is the key point of affecting sludge dewatering. The study clearly illustrated that the surfactant ZWY-28 accelerated the dewatering process and could be used as a potential agent for sludge. Meanwhile, it provides ideas for the selection and structure design of surfactants in sludge dewatering.
研究领域:
环境工程
·
胶体与界面化学
·
废水处理
·
污泥处理
✓ 已验证
DOI
高影响因子
WATER RESEARCH
·
2025
·
IF 12.4
Chao-Xi Yang,Kai-Yue Dong,Ke-Yu Chen,Wei Yao,Yao-Yao Lu,Jin-Luo Pang,Bao-Cheng Huang,Ren-Cun Jin
Excess sludge deep dewatering remains a significant challenge for wastewater treatment sector due to the strong binding of internal bound water within sludge flocs. This study proposes a novel coupling system that synergizes microwave (MW) irradiation with peroxymonosulfate (PMS) activation to enhance the release and removal of internal bound water. By optimizing key parameters, including PMS dosage and MW irradiation time, the results demonstrated that the MW + PMS treatment reduced sludge moisture content from 85.9 % to 64.8 %. In comparison, sole MW or PMS treatments achieved water content reduction to only 84.1 % and 83.1 %, respectively. Electron paramagnetic resonance tests revealed the generation and accumulation of various reactive oxygen species, including ·OH, SO₄ - · and ¹O₂, confirming the efficient activation of PMS. These oxidative species play a crucial role in breaking down extracellular polymeric substance network and microbial cell structure, thereby facilitating internal bound water release. Low-field nuclear magnetic resonance characterization further verified the effective conversion of tightly bound water to more mobile forms. Morphological and thermodynamic analysis indicated that the MW + PMS treatment induced a reduction in the sludge particle size and an increase in surface hydrophobicity. These changes resulted in the formation of cracks during filtration, enhancing water permeability and favoring its removal. More importantly, Lewis's acid-base interaction was identified as the leading force contributing to sludge flocculation and dewatering. This study may provide guidance for developing effective sludge deep dewatering technology.
研究领域:
环境工程
·
污水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Chun-Gang Xu,Wei Zhang,Hao-Yang Li,Chang-Wen Xiao,Xiao-Sen Li
Hydrate technology has a bright future in the development of high quality production and life for human being. However, the slow hydrate formation rate and low gas consumption are the biggest two obstacles to the commercial application of the technology. In this study, the macro experimental investigation, simulation calculation and microscopic analysis are combined to study the process of the hydrate formation and the effects of gas molecules at different cooling ways on the hydrate nucleation process from the perspective of the transformation of free-water to bound-water. Macroscopically, the difference of gas–liquid temperature makes the heat transfer process between gas and liquid at the interface more active, which is more conducive to the diffusion of gas to liquid; and microscopically, the transformation of free-water to bound-water and the distance between oxygen atoms d OO of adjacent water molecules in the hydrate nucleation are the two key factors affecting the rate of hydrate formation and gas consumption. The results of this study not only propose a more efficient hydrate formation way, but also provide direction for solving the key bottleneck of hydrate technology so that it possible for the hydrate technology from laboratory research to industrial application.
研究领域:
化学工程
·
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Xu Chuanqin,Zeng Zhikang,Li Xiaoya,Chen Tianyi,Peng Shusen,Ma Yongcun
The role of additives in surface treatments is pivotal for enhancing the functionality and performance of coatings. While the impact of additives on the functionality and performance of various types of coatings has been mechanistically investigated, the specific influence of additives on the durability of chromate-phosphate conversion coatings remains less understood. This study introduces a novel Cr(III) complex dye, which significantly improves the long-term durability of such coatings. Through comprehensive experimentation, it is demonstrated that the application of this dye markedly influences the morphology, chemical composition, element distribution, and modulus of the conversion film, with negligible effects on the film thickness. The paramount effectiveness of the dye is predominantly realized through the mitigation of bound water in the conversion film and the formation of a more stable structure via interaction with phosphate ions. This work contributes to the nuanced understanding of additive-coating interactions, highlighting the potential of specific chemical agents in advancing the durability of protective coatings.
研究领域:
材料科学
·
表面工程学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）