CONSTRUCTION AND BUILDING MATERIALS
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2018
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IF 3.485
Baoguo Ma,Ting Zhang,Hongbo Tan,Xiaohai Liu,Junpeng Mei,Huahui Qi,Wenbin Jiang,Fubing Zou
This paper aims to investigate the effect of triisopropanolamine (TIPA) on compressive strength and hydration of cement-fly ash paste. The samples with various dosages of TIPA were prepared with 30% fly ash (FA) and 70% cement (water/binder ratio by weight = 0.38), and cured under the standard condition. The compressive strength, pore structure, hydration process, and hydration products were investigated. The results show that TIPA can obviously increase the compressive strength of cement-FA system at the age of 7 d and 60 d, and the reasons are involved in pore structure and hydration of cement-FA system. Pore structure was characterized with mercury intrusion porosimetry, and the results show that TIPA can reduce total porosity but increase the amount of pore with size more than 50 nm, implying the air-entraining effect with negative effect on compressive strength. The result suggests that TIPA and defoaming agent should be used together to minimize the negative effect in real concrete. Furthermore, analysis of hydration products shows that TIPA can accelerate the hydration of both cement and FA, and this can also be illustrated from solid-state nuclear magnetic resonance. It is noticed that TIPA can hasten the conversion of AFt to AFm, which can be indicated from hydration heat. Additionally, the acceleration of pozzolanic reaction of FA is because TIPA can accelerate the dissolution of aluminate, silicate, and ferric into liquid paste which was demonstrated from morphology characterization and the change of ions in pore solution. Such results would be expected to provide experience for the use of alkanolamine in promoting the performance of cement-based materials.
研究领域:
土木工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2020
·Vol. 35
·期 3
·611-619
·
IF 0.64
Zhang Feng,Bai Yin,Cai Yuebo,Chen Bo,Ning Fengwei
Triisopropanolamine (TIPA) was used as an early strength component to study its effects on mortar strength, cement paste setting time and early hydration characteristic of cement. And the early strength mechanism of TIPA at low temperature of 5 °C was also discussed. The results showed that, at 5 °C, the incorporation of TIPA promoted the condensation of cement paste, shortened the initial and final setting time, and accelerated the strength development of specimens at all ages, among which the strength after 3 d increased significantly. The 1, 3, 7, and 28 d compressive strength ratios of the mortars mixed with 1% TIPA could reach 196%, 179%, 160% and 110% respectively, and the mortar strength after 3 d exceeded that of the contrast sample cured at 20 °C. Under low temperature condition, TIPA could promote the hydration reaction of cement, shorten the induction period and advance the acceleration period. Furthermore, the maximum heat release rate and cumulative heat release quantity would be all increased, and the cumulative heat release of the cement mixed with TIPA hydrated for 12 h and 7 d increased 73% and 38% respectively. TIPA could shorten the nucleation and crystal growth (NG) stage and increase its hydration degree significantly, so it promoted cement hydration reaction. Additionally, the hydration reaction rates in phase boundary reaction (I) phase and diffusion reaction (D) phase were increased, and the duration of I process was prolonged, thereby the development of specimen strength would be accelerated. TIPA did not obviously change the types of hydration products, but increased the content of Ca(OH) 2 in the samples and the degree of cement hydration. After hydration to 7 d, large amounts of hydration products, whose surface was smooth, were formed and bonded into sheets, and the structural density of samples improved significantly.
研究领域:
建筑材料学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2018
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IF 3.485
Fubing Zou,Hongbo Tan,Xingyang He,Baoguo Ma,Xiufeng Deng,Ting Zhang,Junpeng Mei,Xiaohai Liu,Huahui Qi
Fly ash (FA) has been accepted as one of the most popular supplementary material in blends with cement. However, high content of FA added would result in very slow strength development at the early age, and this problem limits the use of FA in precast concrete. In this study, an attempt was made to enhance the early strength of steam-cured high content cement-fly ash paste (SCHF, 50% FA) by incorporating triisopropanolamine (TIPA), and the underlying mechanism was systematically investigated in terms of hydration products, pore structure, and ions dissolution of FA. The early hydration process was assessed with isothermal calorimetry, thermogravimetric with differential thermo-gravimetric, and scanning electron microscopy with energy dispersive spectrometer. The pore structure of hardened paste was characterized with mercury intrusion porosimetry. The solubility of FA was analyzed with inductive coupled plasma emission spectrometer, nuclear magnetic resonance, and scanning electron microscopy. The chelating ability of TIPA with Fe 3+ and Al 3+ was evaluated with the conductivity. These results show that with the dosage of TIPA less than 0.10%, the compressive strength will increase with increasing dosage of TIPA, mainly because of the acceleration of both hydration of cement and pozzolanic reaction of FA; while with the dosage more than 0.10%, the compressive strength was sharply decreased owing to its air-entraining effect to increase the harmful pores, with negative effect on mechanical performance. The reason for the accelerated pozzolanic reaction of FA is that TIPA can accelerate the dissolution of aluminum, ferric and silicate into solution to participate in hydration. The findings are expected to provide guidance on promoting the use of FA in precast concrete.
研究领域:
土木工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2018
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IF 2.829
Zhan-fang Cao,Xin Wen,Jing Wang,Fan Yang,Hong Zhong,Shuai Wang,Zai-kun Wu
In this work, a kind of magnetic graphene oxide composite material (TI/GO@Fe 3 O 4 ) for Pb 2+ removal was successfully synthesized through in situ growth method. Briefly, metal ions (Fe 3+ ) were fixed on GO surface by oxygen-containing functional groups and acted as growth centers of Fe 3 O 4 . Furthermore, the surface of GO and Fe 3 O 4 nanoparticles were strengthened by the triisopropanolamine and its oxidation products (TI), which can promote the removal of Pb 2+ ions. The mass percentage of Fe 3 O 4 particles in TI/GO@Fe 3 O 4 was 54.31% by EDS datas. Average particle size of TI/GO@Fe 3 O 4 is 19.03 nm. The adsorption experiments indicated that the adsorption capacity of TI/GO@Fe 3 O 4 can reach 461.00 mg/g under optimized conditions (10 mg TI/GO@Fe 3 O 4 , 50 mL 500 mg/L Pb 2+ , pH 5.0, 293 K, 120 min). The XPS analysis results indicated that the TI/GO@Fe 3 O 4 can adsorb the Pb 2+ through the complexation between nitrogen and oxygen-containing functional groups and Pb 2+ ions. Hence, the composite material is a superior material for the adsorption of Pb 2+ . Moreover, the synthesized adsorbent can be recycled by magnet quickly after adsorption.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 37
·e202402808
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IF 1.9
Xia Yang,Qilong Ling,Yujia Lin,Yanfei Lv,Junhua Xi,Li Fu,Fei Chen,Rui Zhang,Shichao Zhao
Graphical The composite of copper iodide (CuI) nanomaterials and CuI-isopropanolamine complexes was prepared by dissolving CuI in C 3 H 9 NO and subsequent annealing. It exhibited exceptional sensing properties to 0.15 (mole fraction) ammonia: a high response of 7.5×10 5 , a rapid response time of 5 s, and exceptional selectivity, indicating promising potential for practical application in ammonia detection. With the increasing awareness of the hazards associated with ammonia (NH 3 ) contamination and the potential application of NH 3 detection in physical health monitoring, the exploration of high-performance NH 3 sensors has attracted significant attention in recent years. In this paper, we prepared copper iodide (CuI) nanomaterials combined with CuI-isopropanolamine (C 3 H 9 NO) complexes by dissolving CuI in C 3 H 9 NO and subsequent annealing. The resulting product demonstrated exceptional sensing performance to 0.15 (mole fraction) NH 3 , exhibiting a maximum response of 7.5×10 5 with a response time of 5 s. The achieved detection limit was 10 ppm. Our findings provide a valuable reference for further research on NH 3 sensors utilizing complexes formed by copper compounds and organic amines.
研究领域:
材料科学
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化学传感器
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
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2020
·
IF 4.605
Xiaohai Liu,Baoguo Ma,Hongbo Tan,Li Gao,Pian Chen
Metakaolin (MK) is a widely used admixture in chloride immobilization which is conducive to the durability of reinforced concrete. In this study, triisopropanolamine (TIPA) was added into cement-MK system to improve the chloride immobilization by expediting the pozzolanic reaction of MK. The effect of TIPA on hydration of binder composed of 90% Portland cement and 10% MK was investigated, and the hydration behavior was characterized by thermogravimetric analysis , X-ray diffraction, nuclear magnetic resonance spectroscopy , and mercury intrusion porosimetry , based on the evaluation of pozzolanic reaction of MK by ion dissolution. Results indicated that TIPA promoted the hydration of both MK and cement, and chloride immobilization was also improved. The mechanism for the improvement was involved in three aspects: a) TIPA facilitated the dissolution of aluminum from MK to obtain more chloroaluminate salts, strengthening chemical binding; b) TIPA accelerated hydration of cement and MK for more C-S-H gel, conducive to the physical adsorption; c) TIPA increased the amount of hydrates to refine the pore structure , hindering the migration of chloride ion. This investigation provided one new method for improving the pozzolanic reaction of MK to enhance chloride immobilization of cement-MK system.
研究领域:
建筑材料学
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化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
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IF 2.196
Jun Wang,Jie Ou,Xueni Sun,Xiangjun Tong,Ben Gao,Chunxiang Huang,Hui Shao,Yixin Leng
Measurements of isobaric vapor–liquid equilibrium (VLE) results for binary systems of m-cresol (MC) + diisopropanolamine (DIPA) and 2,6-dimethylphenol (DMP) + DIPA and the ternary system of MC + DMP + DIPA were conducted at the pressure of 20.0 kPa. The binary VLE experimental data showed that DIPA had stronger interaction with MC than DMP. The ternary system experimental VLE data showed that DIPA could improve the relative volatility of DMP to MC. The binary experimental data were checked by using Herington area and point test methods, and the checked results were thermodynamically consistent. Meanwhile, the VLE data were correlated by Wilson, nonrandom two-liquid, and universal quasichemical models, and the binary energy interaction parameters for these models were obtained. These activity coefficient models were used to predict the ternary system VLE data. The predictive results suggested that the Wilson model had the best prediction.
研究领域:
化学工程
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物理化学
✓ 已验证
DOI
高影响因子
WEAR
·
2025
·
IF 6.1
Guangen Zhao,Jianxiong Chen,Yongchao Xu,Cheng Peng,Qianting Wang
It is a great challenge to produce ultra-smooth surface of sapphire wafers at high material removal rate (MRR) using green slurry in semi-fixed abrasive polishing. A novel environmentally friendly polishing slurry was developed by preparing abrasives and complexing agents to improve surface quality and polishing efficiency. The SiO 2 and diamond/SiO 2 composite abrasives were successfully prepared by a simplified sol-gel strategy, exhibiting high purity, homogeneous particle size, and excellent dispersibility. Based on the semi-fixed polishing technology, the green polishing performance of sapphire wafers using different types of abrasives alone and in combination with complexing agents was investigated. The experimental results demonstrated that the novel slurry containing triisopropanolamine (TIPA) and diamond/SiO 2 composite abrasive had superior polishing performance. Compared with the traditional diamond slurry, the surface roughness of the novel slurry was reduced by 24.4 % to 6.2 nm (Ra), while the MRR was increased by 65.4 %. Through electrochemical experiments, molecular simulations, and infrared analysis, the improved polishing performance of the composite abrasives with TIPA may be attributed to the complexation of TIPA and the optimization of interfacial contact behavior. The analysis of wear debris and polished sapphire wafer surface further pointed out that the deformation reduced the indentation depth while enhancing the reactivity of the friction chemistry. The diamond/SiO 2 composite abrasives with TIPA slurry accelerated the generation and removal of the reaction layer consisting of AlOOH, Al-OH, and Al 2 Si 2 O 7 , realizing the optimal synergy between mechanical wear and tribochemistry, which significantly improved the polishing quality.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2020
·
IF 4.419
Chunbao Li,Baoguo Ma,Hongbo Tan,Ting Zhang,Xiaohai Liu,Pian Chen
Chloride was one of important factors resulting in steel bar corrosion in reinforced concrete when using sea resources. In this paper, an attempt to promote the chloride binding capacity of the cement-ground-granulated blast furnace slag (GGBS) system was made by adding triisopropanolamine (TIPA). The paste was prepared by 70 wt% cement and 30 wt% GGBS, sodium chloride, TIPA (0.03%, 0.06% and 0.10%, by weight of binder) and water. The paste was cured for 7 d and 60 d, and the chloride binding ratio (CBR) were measured. The hydration heat and compressive strength were examined, then the hydrates and pore structure of the hardened paste were also analyzed; and the effect of TIPA on aluminum and ferric dissolution of GGBS was also studied. The results showed that TIPA could promote CBR at both 7 d and 60 d. The reason was ascribed to three aspects: (1) TIPA facilitate the formation of FS, which contribute to chemical binding; (2) TIPA promoted the formation of C-S(A)-H gel, which would increase the physical binding; (3) TIPA refined the pore structure and increased fractal dimension, which could enhance the migration resistance. Furthermore, TIPA promoted cement hydration and pozzolanic reaction of GGBS by facilitated the dissolution of aluminum and ferric in GGBS. Additionally, the formation of Friedel's salt was promoted due to the transformation of ettringite to AFm-like phase promoted by TIPA. Such results suggested a new way to improve chloride binding capacity of cementitious materials by adding alkanolamine.
研究领域:
土木工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Desalination and Water Treatment
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2024
·
IF 1
Xin Wen,Zhanfang Cao,Jing Wang,Shuai Wang,Hong Zhong
A novel tri-isopropanolamine functionalized graphene oxide (TI-GO) adsorbent was synthesized by one-step reaction at 358K. Then the prepared TI-GO was characterized by SEM-EDS, FTIR, Raman spectra, TG, BET and XPS. The characterization results indicated the TI-GO has been synthesized successfully and it interact with Pb(II) ions through its nitrogen and oxygen-containing functional groups. Batch adsorption experiments were applied to evaluate the optimized conditions of adsorption. The results indicated that the TI-GO can reach equilibrium adsorption in 30 min and get maximum adsorption capacity at 293 K, pH 5.0. Besides, the adsorption kinetic and adsorption isotherm research indicated that the adsorption of TI-GO fit pseudo-second-order (PSO) kinetic and Langmuir adsorption isotherm model. In addition, the maximum adsorption capacity evaluated by Langmuir adsorption isotherm equation is 1478 mg/g.
研究领域:
环境科学
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材料科学
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化学工程
·
环境污染治理
·
吸附材料
✓ 已验证
DOI
高影响因子
Journal of Building Engineering
·
2024
·
IF 6.7
Jiaqi Liu,Meiyan Hang,Minghui Jiang,Guangfei Xu,Hongbin Song
In this research, aiming to deal with the accelerated corrosion deterioration of steel reinforcement in reinforced concrete in harsh environments, a highly efficient rust inhibitor (triethanolamine (TEA)-triisopropanolamine (TIPA)) (abbreviated as TT), which TEA and TIPA compounded in a ratio 4:6, was proposed. The synergistic rust inhibition effect of TEA and TIPA on steel in the simulated concrete pore solution (SCPS), and its corrosion inhibition performance were investigated by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), dry and wet cycling, and scanning electron microscopy (SEM) measurements. The results showed that TT inhibitor could obviously inhibit the corrosion of steel in the SCPS and could inhibit both cathode and anode. The electrochemical corrosion inhibition performance was the most excellent at the dosage of 1.0 %, and the maximum corrosion inhibition efficiency ( η 1 ) reached 95.39 %. After 150 times of dry and wet cycling, the percentage of the corrosion area ( S ), and corrosion inhibition efficiency ( η 2 ) with 1.0 % TT inhibitor were 9.3 % and 84.03 %, respectively, and the mass loss rate ( M ) decreased by 68.4 %, indicating a better rust inhibition performance. The adsorption of the TT inhibitor conformed to the Langmuir adsorption isotherm and inhibited the corrosion of steel by forming a protective film on steel surface through physicochemical adsorption. This study is of great significance to provide new perspectives and improvement measures to build up the deterioration and extend the service life of reinforced concrete in harsh environments.
研究领域:
土木工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
·
2021
·
IF 2.168
Yanyang Gao,Wanqiu Liu,Liuyan Tang,Yanan Zhu,Jinqing Qu
As the laws about emission of volatile organic compounds (VOCs) become more and more stringent, low VOC content coatings, such as high solid polyurethane coating, gradually attract great attention. Herein, a series of star-shaped hydroxyl polyesters (SHPs) were synthesized by methyl hexahydrophthalic anhydride (MHHPA), diisopropanolamine (DIPA), and monoglycidyl ether. The number of their average molecular weights is ranged from 913 to 1390 with 1.55–1.75 of PDI. The viscosities of SHPs are low to 1060 mPa·s. The molecular structures of SHPs were characterized by Fourier transform infrared (FTIR) and 1H nuclear magnetic resonance (1H NMR) spectroscopies. The high-solid two-component polyurethane coatings (2 K-PU) from SHP-3 have a 65% of the solid contents and exhibit 20 mPa·s of the applied viscosity with 310 g/L of VOC contents. Moreover, the polyurethane film displays high coating hardness up to 2H, as well as excellent chemical resistance and good thermal stability.
研究领域:
高分子科学
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材料工程
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涂料技术
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环境化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）