CEMENT & CONCRETE COMPOSITES
·
2022
·
IF 9.93
Linan Gu,Tiejun Liu,Kai Wu,Zhenghong Yang,Zhaoyin Wen,Zhenlei Zhang,Haoxin Li
It is still uncertain whether temperature exerts some influence on the water retention (WR) and bleeding of cement-based materials with viscosity-enhancing admixtures (VEAs). Thus, WR and bleeding of cement-based materials with selected VEAs, such as sodium polyacrylate (PANA), hydroxyethoxy methoxy cellulose (HEMC) and hydroxypropoxy methoxy cellulose (HPMC), were evaluated at 20, 30, 40, 50, and 60 °C, and experiments on the apparent viscosity , total organic carbon (TOC) content, hydrodynamic radius and thermogravimetry were carried out to explore the responsible mechanisms. The results show that VEAs enhance WR and reduce bleeding at room temperature to varying degrees. However, this improvement at higher temperature does not occur as at room temperature (20 °C). The decreased improvements in WR and bleeding at higher temperature are associated with the lowered apparent viscosity , TOC content, hydrodynamic radius and the increased cement hydration . Below 40 °C, the apparent viscosity, adsorption and hydrodynamic radius dominate the bleeding behaviour of mortars with HPMC and HEMC. However, accelerated cement hydration is mainly responsible for the behaviour when the temperature exceeds 40 °C.
研究领域:
土木工程
·
材料科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Qiang Liu,Yitao Yu,Guanglai Zhu,Haiming Liu,Chuanxing Jiang,Wei Zhang,Yuanyue Li,Qiang Xue,Yong Wan,Bing Li,Xian Zhang,Caifeng Dai,Zhenhua Wang
The hybrid super absorbent resin (SAR), Poly(acrylicacid-co-acrylamide-co-2-acrylamido-2-methyl-1-propane sulfonic acid) based on zeolite synthesized from solid waste slag (P(AA-co-AM-co-AMPS)/zeolite) was synthesized. The chemical and structural characteristics of the materials were examined through FTIR, XRD , and SEM studies. In the presence of zeolite, the flat surface of the composite transformed into interconnected porous structure . The deionized water equilibrium swelling capacity of the hybridized SAR (835.79 g/g) was higher than that of the pure SAR (524.53 g/g). As much as 40 % of the water was released from the fully swollen hybrid SAR when it was centrifuged. P(AA-co-AM-co-AMPS)/zeolite had a swelling loss rate just of 27.64 % after five swelling/drying cycles. In addition, it still had good absorption in ionic salt solutions of different concentrations and good water retention at different temperatures. This confirmed that the hybridized SAR had excellent water holding capacity and salt solution adsorption. The FTIR and XRD results showed that the excellent performance of the hybridized SAR may originate from the interconnection of the zeolite and the pure SAR. The P(AA-co-AM-co-AMPS)/zeolite may be utilized as an agricultural water retaining agent.
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
JOURNAL OF MEMBRANE SCIENCE
·
2014
·
IF 4.908
Xueqin Li,Meidi Wang,Shaofei Wang,Yifan Li,Zhongyi Jiang,Ruili Guo,Hong Wu,XingZhong Cao,Jing Yang,Baoyi Wang
Composite membranes were fabricated by incorporating poly(N-isopropylacrylamide) nanohydrogels (NHs) into Matrimid ® 5218 matrix to improve the separation performance for CO 2 /CH 4 and CO 2 /N 2 mixtures. The membranes were characterized by a fourier transform infrared spectrometer (FT-IR), scanning electron microscopy (SEM), tensile test, dynamic mechanical analysis (DMA), X-ray diffraction (XRD), positron annihilation lifetime spectroscopy (PALS), the static contact angle and water content measurement. The incorporation of nanohydrogels increased the fractional free volume of the composite membranes, water uptake and water retention capacity. The composite membranes displayed better performance than the pure Matrimid ® membrane. The nanohydrogels homogeneously embedded in the Matrimid ® matrix acted as water reservoirs to not only provide more water for dissolving CO 2 , but also construct interconnected CO 2 transport passageways. The as-prepared Matrimid ® /NHs-20 composite membrane showed CO 2 /CH 4 and CO 2 /N 2 selectivities of 61 and 52 with a CO 2 permeability of 278 Barrer, surpassing or being close to the 2008 Robeson upper bound lines.
研究领域:
材料科学
·
环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Jiarui Du,Guangli Yu,Huiming Lin,Pengfei Jie,Feng Zhang,Fengyu Qu,Chen Wen,Lei Feng,Xiaoqiang Liang
A series of composites have been fabricated by introducing ionic liquid (IL) (ship) into chromium terephthalate MIL-101 (bottle) by ship-in-bottle method (IL@MIL-101s), the resulting IL@MIL-101s are endowed to high water retention, which is essential to proton conducting on multiple energy-involved applications at the low relative humidity (RH). The humidifying IL can lower water loss and increase water uptake, and thus improves water retention properties of the composites aided by the mesoporous MIL-101 at low RH. The hydropenic proton transfer pathways are modeled inside MOF and between IL–MOF, diminishing energy barrier routes for proton hopping, and thus a promotive proton transfer is rendered via Grotthuss mechanism. Specially, the IL@MIL-101 (SIB-3) unfolds a high proton conductivity (σ = 4.4 × 10 −2 S cm −1 ) at RH as low as ~23%, five orders of magnitude increase than that of parent MIL-101 (1.1 × 10 −7 S cm −1 ) at 323 K. Besides, IL@MIL-101s as fillers are incorporated into polymer blends to form hybrid membranes, appearing the relatively high proton conductivity (4.3 × 10 −3 S cm −1 ) under ~23% RH at 323 K.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Shenghao Mao,Guodong Zeng,Jieping Xing,Youming Dong,John Tosin Aladejana,Fuxiang Chu,Chunpeng Wang,Jianzhang Li
Soybean meal (SM)-based adhesive, which is sustainable and releases no aldehyde, can play an important role in the development of green adhesives. However, natural SM-based adhesives lack water retention ability, which makes it tedious to apply in engineered materials. This work designed a polymer entanglement system by free radical polymerization of acrylamide (AAm). As a small molecule filler, succinic acid (SA) entered the polyacrylamide (PAAm) cross-linking network. The hydrophilic amide groups of PAAm can adsorb water molecules through hydrogen bonding interactions, while the introduction of SA achieved hydrogen bonding interlocking between carboxyl and amide groups on water molecules, firmly locking water molecules in the three-dimensional network of PAAm. This not only improved the cohesion of the adhesive, but also achieved excellent water retention performance.The prepressing strength of the plywood with the prepared adhesive was 1.05 MPa, which grew by 104 times in contrast to unmodified one (0.01 MPa) after the veneer was once opened and evaporated in the air for 1 h. In addition, the water content of the modified adhesive was found to be multiplied by 69.5 % after 3 days, in contrast to the unmodified adhesive. The dry and wet shear strengths of the modified adhesive were 2.47 and 1.21 MPa, which were 61.8 % and 317.2 % higher than the SM adhesive. A SM-based adhesive system that enhanced water retention while increasing strength was created, achieving excellent water retention, high bonding strength, and excellent long-term prepressing performance. As a green adhesive, this is a good reference for the further development of soy protein adhesives in engineering applications.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Rongnian Xu,Shuanhong Ma,Peng Lin,Bo Yu,Feng Zhou,Weimin Liu
Integrating proteins into a hydrogel network enables its good bioactivity as an ECM environment in biorelative applications. Although extensive studies on preparing protein hydrogels have been carried out, the reported systems commonly present very low mechanical strength and weak water-rentention capacity. Learning from the astringent mouthfeel, we report here a protein engineered multinetwork physical hydrogel as TA-PVA/BSA. In a typical case, the BSA protein-integrated poly(vinyl alcohol) (PVA) solution is treated by the freeze-thaw method and forms the first hydrogel network, and tannic acid (TA) then cross-links with BSA proteins and PVA chains to form the secondary hydrogel network based on the noncovalent interaction (hydrogen bond and hydrophobic interaction). The as-prepared TA-PVA/BSA composite hydrogel is a pure physically cross-linking network and possesses ultrahigh tensile strength up to ∼9.5 MPa but is adjustable, relying on the concentration of TA and BSA. Moreover, its mechanical strength is further improved by prestretching induced anisotropy of mechanical performance. Because of its controllable and layered structure as skin, the composite hydrogel presents good water-retention capacity compared to traditional high strength hydrogels. This work demonstrates a novel method to design high mechanical strength but layered physical cross-linking hydrogels and enables us to realize their biorelative applications.
研究领域:
生物材料学
·
生物医学工程
✓ 已验证
DOI
高影响因子
FUEL
·
2024
·
IF 6.7
Chenwei Zou,Yifei Liu,Ning Yang,Quanmin Luo,Chengwei Mao,Yining Wu,Caili Dai
Crosslinked polyacrylamide gel serves as an effective plugging material, crucial for preventing water/gas channeling in reservoirs and enhancing the swept volume and oil recovery. However, its practical application encounters a significant challenge in maintaining long-term stability of strength and volume, particularly under high temperatures. This study investigates the reinforcement of polyacrylamide gel with three-dimensional (3D) nanomaterials, specifically tetra-needle-like zinc oxide whiskers (T-ZnOw), to enhance its structural stability and bound water content. The stress sweep tests showed that the addition of 0.15 wt% T-ZnOw increased the maximum elastic modulus of the gel to 28.5 Pa, representing a 51.2 % improvement compared to before the addition. After 60 days of high-temperature aging at 130 °C, the T-ZnOw strengthened gel still maintained an elastic modulus of 21.8 Pa. With increasing T-ZnOw concentration, the yield point of the gel increased from 4.74 Pa to 9.57 Pa, the anti-deformation of the gel has significantly increased. The stability test results in high salinity water indicate that at a salinity of 150,000 mg/L, the dehydration rate of the strengthened gel is less than 5 %, with an elastic modulus retention rate exceeding 88 %. Furthermore, thermodynamic testing confirms the enhanced thermal degradation resistance and water retention capacity of the gel. Under reservoir temperature conditions, the T-ZnOw strengthened gel exhibits a weight loss of less than 3 %. Additionally, the inclusion of T-ZnOw results in an increase in the bound water capacity index from 4.65 to 12.28. In conclusion, the integration of T-ZnOw into the polyacrylamide gel network not only enhances its mechanical performance and water retention under high-temperature conditions but also demonstrates superior stability in high-salinity environments. This innovative material shows significant potential for improving oil recovery rates in high-temperature reservoirs and can be applied to other high-temperature underground scenarios such as geothermal development and CO 2 utilization and storage.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yulu Zhang,Yang Yang,Yajiao Jiang,Xin Zhang,Haoyu Tan,Xiangguo Li,Zhen Xu,Juan Chen,Yingnan Ma
Hydrogel membranes exhibit promising proton conductivity, but their low mechanical strength and poor water retention ability limit their application in proton exchange membrane fields. In this work, the strategic integration of chitosan into the covalently cross-linked PEI network created a semi-interpenetrating network (semi-IPN) architecture where linear chitosan chains permeate the matrix through hydrogen bonding and electrostatic interactions, forming physical cross-links that impose topological constraints. Benefiting from the distinctive structural synergy between chitosan and the hydrogel matrix, the fabricated semi-IPN rigid hydrogel demonstrated exceptional tensile strength (7.8 MPa, representing a 172.57% improvement over chitosan-free counterparts), superior water retention capability (70.726% water retention rate at 12 h, doubling that of neat PEI hydrogel membranes), outstanding proton conductivity (165.7 mS/cm, 1.33 times higher than pristine hydrogels), and excellent electrical stability under elevated temperatures (88.6% conductivity retention at 80 °C after 720 min and 71.28% retention at 100 °C). We believe that the development of semi-IPN hydrogels in this work holds significant implications for advancing proton exchange membrane research, particularly in addressing critical challenges related to durability and proton transport efficiency.
研究领域:
材料科学
·
能源工程
·
化学工程
✓ 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
Chengyong Gao,Xueni Hou,Tieling Xing,Guoqiang Chen
The water retention of printing inks is of the utmost importance. According to low -field nuclear magnetic resonance (LF-NMR) to detect the behavior of polyols and water, polyols with excellent water retention performance can be selected quickly. The water retention of disperse ink is closely related to the intramolecular/intermolecular forces of each component in the disperse ink. The relationship between each component of the ink is revealed by LF-NMR. The water retention of ink was also evaluated by LF-NMR. Therefore, the LF-NMR was able to design ink formulation and evaluate ink quality. Compared with NNO and TD-1109, Surfynol CT-136 had a higher grinding efficiency for disperse dyes. The physicochemical properties of disperse ink was evaluated to meet the requirements of inkjet printing ink. The rheological properties of the disperse inks were characterized by rotary rheometer, which were confirmed as Newtonian fluid ; The quality of the ink-jet printing pattern is closely related to the ink jet performance. The formation process of the ink droplet and the parameters of the ink droplets were observed by the ink droplet observer. The ink has excellent jetting properties and a high-quality print pattern at an appropriate viscosity (3.1 mPa.s) and surface tension (34.2 mN/m). The excellent affinity between NVP/VA copolymer (NVP/VA64) and disperse dyes was confirmed by ultraviolet spectrophotometer (UV spectrophotometer). The scanning electron microscope (SEM) images of printed fabrics show that there is a film on the surface. The NVP/VA copolymer can be used as a carrier for disperse dye to improve the fixation and fastness of disperse dye in polyester fabrics.
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
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 31
·16079-16088
·
IF 7.443
Yongheng Yin,Wanyu Deng,Hongyan Wang,Anping Li,Chongbin Wang,Zhongyi Jiang,Hong Wu
Hollow mesoporous silica microspheres with a uniform pore size and a large surface area are synthesized and functionalized by three kinds of amino acids with different acid–base pairs, including sulfonic acid–amino groups (HMS-Cys), phosphoric acid–amino groups (HMS-Phos) and carboxylic acid–amino groups (HMS-Asp). The incorporation of these microspheres into a Nafion matrix enhances the water uptake and adjusts the organic–inorganic interface and hydrophilic ionic domains inside the membranes. Microspheres with a hollow mesoporous structure endow the membranes with strong water retention ability. The proton conductivities of hybrid membranes are more than 8 times higher than that of recast Nafion at 40 °C and 20% RH after 90 min of testing. The acid–base pairs within the membranes work as proton donors and acceptors, and the retained water molecules are used as hydrogen-bonded bridges, which reduce the energy barrier for proton conduction. At the filler content of 4 wt%, the HMS-Cys embedded membrane shows the highest proton conductivity of 1.19 × 10−1 S cm−1 (30 °C, 100% RH). In addition, hybrid membranes incorporated with amino acid functionalized HMS show small reliance on humidity. The proton conductivities of all the hybrid membranes are ∼5.29–11.1 times higher than that of the recast Nafion under 26.1% RH and 80 °C.
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
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 139
·期 46
·e53247
·
IF 3.057
Weikun Jia,Lan Wang,Yan Xu,Xiaotao Wen,Xueyan Ma,Zhaoyang Cui
To overcome the poor conductivity of electrode film in bio-gel electroactive actuator, graphene was introduced into its structure to prepare a kind of bio-gel electroactive actuator based on chitosan, and its actuation characteristics were analyzed. First of all, the output characteristics of the electroactive actuator prepared with the addition of graphene oxide （GO）were tested to obtain the variation patterns of bending force and displacement. Second, electrochemical and microscopic tests were carried out and the water retention rate was analyzed to explore the internal reasons for the improvement of output characteristics. Third, how the mass fraction of GO influences the polymer electroactive actuator's bending force performance was comprehensively analyzed. The results show that adding GO significantly improved the electroactive actuator's performance. Adding graphene oxide into the polymer actuator was proved to be an effective strategy to improve the actuator's actuation properties.
研究领域:
材料科学
·
生物工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hengwei Wang,Keliang Wang,Rui Zhang,Bin Liang,Zhuo Chen,Manhui Wei,Jianyin Xiong,Daiyuan Zhong,Yayu Zuo,Pucheng Pei
Rechargeable flexible zinc-air batteries (FZABs) are promising alternatives to lithium-ion batteries for portable and wearable devices. A critical component of FZABs is the gel polymer electrolyte (GPE), which faces challenges such as water loss and poor tensile flexibility under extreme conditions. These issues must be addressed to ensure high utilization of the Zn anode and air catalyst and to meet the demands of harsh environments. This study presents a dual-network GPE leveraging the physical crosslinking between polyacrylic acid (PAA) and κ-carrageenan (KC) for FZABs. The polar –COO- groups in PAA and the hydroxyl and glycosidic groups in KC form strong hydrogen bonds with H 2 O molecules, achieving high water retention and strong adhesion to the electrode surface. Additionally, the dual-network structure and ionic bonds between the −OSO 3 − groups in KC and Na + cations dissipate energy during stretching, enhancing tensile flexibility. Compared to PAA GPE, the PAA-KC GPE showed remarkable improvements, with maximum elongation increasing by 745 % to 710 %. The water retention rate of PAA-KC GPE exceeded 60 % after 107 h of air exposure. The cycle life of PAA-KC GPE-based FZABs (63 h at 2 mA cm −2 ) was 1.86 times longer than that of PAA GPE-based FZABs. Even under extreme temperatures (−20 °C∼80 °C), PAA-KC GPE-based FZABs demonstrated excellent stability. The developed PAA-KC dual-network GPE shows great potential for flexible energy storage under extreme deformation and temperature conditions.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）