NATURE
·
2019
·Vol. 574
·期 7778
·394-398
·
IF 43.07
Liu Zhaoming,Shao Changyu,Jin Biao,Zhang Zhisen,Zhao Yueqi,Xu Xurong,Tang Ruikang
Inorganic materials have essential roles in society, including in building construction, optical devices, mechanical engineering and as biomaterials 1 , 2 , 3 , 4 . However, the manufacture of inorganic materials is limited by classical crystallization 5 , which often produces powders rather than monoliths with continuous structures. Several precursors that enable non-classical crystallization—such as pre-nucleation clusters 6 , 7 , 8 , dense liquid droplets 9 , 10 , polymer-induced liquid precursor phases 11 , 12 , 13 and nanoparticles 14 —have been proposed to improve the construction of inorganic materials, but the large-scale application of these precursors in monolith preparations is limited by availability and by practical considerations. Inspired by the processability of polymeric materials that can be manufactured by crosslinking monomers or oligomers 15 , here we demonstrate the construction of continuously structured inorganic materials by crosslinking ionic oligomers. Using calcium carbonate as a model, we obtain a large quantity of its oligomers (CaCO 3 ) n with controllable molecular weights, in which triethylamine acts as a capping agent to stabilize the oligomers. The removal of triethylamine initiates crosslinking of the (CaCO 3 ) n oligomers, and thus the rapid construction of pure monolithic calcium carbonate and even single crystals with a continuous internal structure. The fluid-like behaviour of the oligomer precursor enables it to be readily processed or moulded into shapes, even for materials with structural complexity and variable morphologies. The material construction strategy that we introduce here arises from a fusion of classic inorganic and polymer chemistry, and uses the same cross-linking process for the manufacture the materials.
研究领域:
材料科学
·
无机化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2024
·
IF 2.8
Yao Feng,Wenwen Liu,Chaoqun Mu,Lvling Zhong,Zhixian He,Liang Zhang,Juanqin Xue
Several issues plague polymer and calcium carbonate (CaCO 3 ) composites, including the tendency of CaCO 3 particles to aggregate and detach easily, as well as a limited number of adsorption sites. To address the aforementioned issues, a novel large-particle hollow shell-structured PVA-encapsulated nano-CaCO 3 aerogel (PCC) was prepared. The characterization results indicate that the PCC (∼3 mm) possess a three-dimensional network structure with a stereoscopic arrangement of big and small pores. The adsorption of Pb(II) adheres to pseudo-first-order adsorption kinetics and the adsorption equilibrium follows the Langmuir model with a maximum adsorption capacity of 482.85 mg/g at 313 K for Pb(II). The PCC exhibits good selectivity and stability of adsorption towards Pb(II), retaining 92.6 % of its initial adsorption capacity after seven cycles. The large-particle morphology of this material demonstrates significant potential for effectively removing Pb(II) in wastewater treatment applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 40
·
IF 1.768
Huan-Ling Wu,Xiao-Xiao Hou,Christopher Branford-White,Xiao-Zhu Sun,Lei Tao,Syeda Um-I-Zahra,Li-Min Zhu
Calcium carbonate (CaCO 3 )/alginate inorganic–organic hybrid particles were synthesized and deposited on to the surface of cotton fabrics with a novel one-step procedure. The effects of the Ca 2+ /CO 3 2− /alginate molar ratio on the cotton matrix were investigated. The optimization of the process resulted in a regular shaped hybrid microparticles, and scanning electron microscopy revealed that the particles were uniformly distributed on the surface of the fibers. Dynamic light scattering showed that the particles were about 2 μm in diameter. Moreover, transmission electron microscopy images demonstrated that the core–shell structure of the particles existed along with CaCO 3 evenly enfolded into the alginate layer. An X-ray diffraction pattern displayed that the alginate/CaCO 3 hybrid microparticles were a mixture of calcite and vaterite crystal. Fourier transform infrared spectroscopy indicated that CaCO 3 /alginate hybrid particles formed in situ were the only deposited materials. The thermogravimetric analysis curve indicated a certain mass ratio of the alginate and CaCO 3 in the hybrid particles. Furthermore, the drug-loading and drug-release properties of the hybrid microspheres were studied, and the results show that the water-soluble diclofenac sodium could be effectively loaded in the hybrid microparticles and the drug release could be effectively sustained. Finally, both of the microparticles and modified fabrics had good cytocompatibility. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42618.
研究领域:
材料科学
·
生物医学工程
·
纺织科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2016
·
IF 3.902
Qiwei Zhong,Wenhua Li,Xiuping Su,Geng Li,Ying Zhou,Subhas C. Kundu,Juming Yao,Yurong Cai
Despite superior clinical handling, excellent biocompatibility, biodegradation property of calcium phosphate needs to be improved to coincide with the rate of new bone formation. In this study, spherical CaCO 3 are fabricated in the presence of the silk sericin and then transformed into porous hydroxyapatite (HAP) microspheres via hydrothermal method. The degradation behavior of obtained CaCO 3 , HAP and their mixture is first investigated in vitro . The result demonstrates that the weight loss of HAP microspheres are almost 24.3% after immersing in pH 7.40 Tris-HCl buffer solution for 12 weeks, which is far slower than that of spherical CaCO 3 (97.5%). The degradation speed of the mixtures depends on the proportion of CaCO 3 and HAP. The mixture with higher content of CaCO 3 possesses a quicker degradation speed. The obtained CaCO 3 and HAP microspheres are injected into subcutaneous tissue of ICR mice with the assistance of sodium alginate. The result in vivo also shows an obvious difference of degradation speed between the obtained CaCO 3 and HAP microspheres, implying it is feasible to modulate the degradation property of the mixture through changing the proportion of CaCO 3 and HAP The good cytocompatibility of the two kinds of microspheres is proved and a mild inflammation response is observed only at early stage of implantation. The job offers a simple method to modify the degradation properties of biomaterial for potential use in bone tissue engineering.
研究领域:
材料科学
·
生物材料
·
组织工程
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Kegui Zhang,Wenzhong Yang,Feng Ge,Bin Xu,Yun Chen,Xiaoshuang Yin,Ying Liu,Huanzhen Zuo
A composite coating containing konjac glucomannan (KGM) and CaCO 3 was fabricated on AA5052 alloy through a self-curing process, and its surface morphology and component were characterized by scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and thermogravimetric analysis (TGA). The effect of Ca(OH) 2 content on the protective property of the composite coating for aluminum alloy in 3.5 wt% NaCl solution was evaluated by electrochemical impedance spectroscopy measurements. Moreover, the inhibitory performance of the coating on the pitting corrosion of metal was examined by potentiodynamic polarization curves and atomic force microscopy (AFM). The images of scanning electron microscope show the composite coating with a thickness of 50 μm has well-defined branch-shaped structure. The FT-IR spectra confirm the successful fabrication of the polymer coating through the formation of CaCO 3 . The results of electrochemical impedance spectroscopy suggest that the resistance of the aluminum alloy sample coated with such protective layer is improved by six orders of magnitude, compared with the bare metal. After 60 d of immersion, the polarization curve data and AFM analysis show the pitting corrosion occurring on AA5052 surface is prevented due to the barrier property of coating.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2020
·Vol. 6
·期 12
·1250c8
·
IF 1.929
Lihui Meng,Jigang Wang,Qingwang Liu,Zhenzhong Fan
In this paper, a strategy for synthesizing hierarchical calcite calcium carbonate (CaCO3) microspheres was developed. The material was characterized by SEM, TEM, EDS, FT-IR and XRD. The synthetic CaCO3 has an excellent micro-/nano self-assembled structure, which changes the surface wettability. And the contact angle of CaCO3 with water as high as 130.9°, which has a great change compared with the ordinary CaCO3. At the same time, the product has good foaming properties (increase by 17%) and high adhesion. Novelly, the topographical hydrophobic particles are applied to stabilize the foam.
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 Saudi Chemical Society
·
2021
·
IF 3.932
Lefeng Liu,Zhiguo Xu,Yang Liu,Zheng-Zhi Yin,Yanshan Sheng,Chengqiang Ding,Yong Kong
Cytarabine (Cyt) encapsulated calcium carbonate (CaCO 3 ) nanospheres were facilely synthesized through a simple co-precipitation method, and the Cyt encapsulated CaCO 3 nanospheres (CaCO 3 /Cyt) were modified by polyacrylic acid (PAA) hydrogels through in situ polymerization of acrylic acid (AA) monomer on the surface of the CaCO 3 /Cyt. Successful preparation of the Cyt loaded CaCO 3 /PAA hydrogels were confirmed by the characterization of SEM, TEM and FT-IR. Premature release of Cyt in acidic medium (pH = 1.2) could be effectively circumvented by the introduction of the PAA hydrogels. More importantly, pH-responsive delivery of Cyt from the as-prepared CaCO 3 /PAA hydrogels could be achieved due to the pH-sensitivity of the PAA. Although the highest swelling ratio of PAA was obtained at pH 7.3 (27.7), the highest cumulative release of Cyt from the carrier was achieved at pH 5.3 (86.75%), which might be attributed to the high stability of CaCO 3 at pH 7.3. That is to say, the highest cumulative release of Cyt at pH 5.3 was a compromise by considering the relatively high swelling ratio of PAA and the relatively low stability of CaCO 3 .
研究领域:
材料科学
·
药学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Saudi Chemical Society
·
2018
·
IF 2.456
Henghui Huang,Qi Yao,Qi Jiao,Bailing Liu,Hualin Chen
In order to improve the scale inhibition efficiency of existing polyepoxysuccinic acid (PESA) and to study the impact of their molecular structure on scale inhibition efficiency, a series of PESA with linear and hyper-branched structure have been designed and synthesized through co-polymerization reaction with glycidyl and epoxy succinate. The scale inhibition behavior of PESA with linear and hyper-branched structure against CaCO 3 and CaSO 4 scales was evaluated using static scale inhibition method, and their ability to retard deposition of CaCO 3 was also examined. The experimental results showed that, for CaCO 3 and CaSO 4 , the PESA with hyper-branched structure provides a scale inhibiting efficiency as high as 95.9% and 94.3%, respectively, at an inhibitor concentration of 15 mg/L. In addition, the processes of crystal nucleation, growth and crystal morphology have been analyzed. The experimental results show that the PESA with hyper-branched structure not only prolongs the induction period of CaCO 3 crystal nucleation, but also reduces the number of crystal nuclei and changes the size and morphology of the CaCO 3 crystal. Moreover, the FTIR, SEM and XRD analyses showed that the PESA with hyper-branched structure can induce the irregularity of growing CaCO 3 crystal, destroy the formation of crystals and change the polymorphs of calcium scale crystal. This conclusion indicates that the prepared PESA with hyper-branched structure has great potential for applying in the treatment of industrial water.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
POLYMER BULLETIN
·
2017
·Vol. 75
·期 3
·1123-1139
·
IF 1.43
Jiang Zhi,Wang Jingwen,Ge Renkui,Wu Chanjun
The effects of surface modification of ground calcium carbonate (GCC) particles on the thermal and mechanical properties of poly(vinyl chloride) (PVC) based composites were investigated. Aminopropyltrimethoxysilane (APS) was used as a modifier for GCC particles. The experimental results indicated that the pre-treatment of GCC particles with NaOH promoted the formation of OH − on the surface of GCC particles, which improved the graft of APS on GCC surface and enhanced the interfacial interaction between GCC particles and PVC matrix. The SEM micrographs of the PVC filled with different GCC particles showed that the dispersion of fillers in the PVC matrix was improved by surface modification. The results of TG showed that the thermal properties of PVC filled with NaOH/APS modified GCC particles (PVC/GCC–OH–APS) outweighed those of PVC filled with APS modified GCC particles (PVC/GCC–APS) or raw GCC particles (PVC/GCC). Compared with the use of raw GCC, the use of the surface modified GCC particles, especially the GCC–OH–APS, led to the increase of the tensile strength and impact strength of the composites.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Benoit Rugabirwa,David Murindababisha,Yin Li,Yanzhen Hong,Yuzhong Su,Hongtao Wang,Jun Li
We propose a novel and cyclic synthetic approach for controlling crystal polymorphs of CaCO3 by using green CO2-responsive switchable solvents which acted as both the CO2 capturer for the carbonate source and the polymorphisms director. Five solvents were employed, and various reaction conditions such as calcium resources, calcium concentration, reaction temperature, and reaction time were investigated. Results show that this developed framework permits producing any crystalline CaCO3 phases including metastable vaterite and aragonite in pure phases by selecting a suitable solvent and adjustment of the reaction conditions. Furtherly, the mechanism study demonstrates that the solvents attach on the surface of the primary nanoparticles to selectively control and direct the growth of any specific polymorph phases. Eventually, the nuclei are self-assembled into an oriented geometry, allowing the growth and stability of specific crystals; as such, spherical vaterite, rods, and shuttle-like aragonite crystals can be obtained. This new configuration would be an appropriate and an efficient method to apply to large-scale production, therefore, a promising process attributed to complete solvent recovery and regeneration of the initial reactants, thus being an environmentally risk-free route.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Tiantian Tao,Zuoxuan Zhu,Shengzhe Jia,Weiwei Tang,Junbo Gong
Chameleons can rapidly modify their coloration by manipulating the arrangement of iridophores encompassing guanine crystals in their dermis, which enables incident light to undergo birefringence. Various biomaterials have been designed to mimic the arrangement of guanine crystals, yet instances of synthesizing bottom-up structures with anisotropy for optical functionality remain rare. In this study, we report a novel two-step gas diffusion method for in-situ synthesis of CaCO 3 (Vaterite) within a hydrogel to fabricate a bio-photonic film displaying birefringence interference colors. This strategy enables the successful fabrication of an inorganic–organic photonic film with superior mechanical properties and flexibility, resulting in high transparency, superior toughness, and adjustable optical anisotropy. Through a combination of experiment and simulation results, we elucidated the critical role played by shape factor (distribution) and structural factor (particle size) in producing transmitted interference colors. Finally, the birefringent photonic films prepared using the dot-plate method can function as optical patterns accurately representing the “on”/“off” state within a binary system. This system offers high spatial resolution, excellent repeatability, and precise controllability of optical properties, making it applicable in fields such as information encryption and decrytion. Our study has successfully synthesized photonic material with anisotropic structure though in-situ method while elucidating the underlying mechanism governing their ability to generate transmission interference colors, thus opening up new avenues for transparent flexible polarized optics, imperceptible wearable devices, and advanced information encryption.
研究领域:
材料科学
·
光学工程
·
生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Jin-Ling Zhang,Zhan-Zhan Wang,Ting-Yu Yang,Sobhan Chatterjee,Mao-Sheng Cao,Hong-Shang Peng
Mineralization of CO 2 to minerals like calcium carbonate (CaCO 3 ) has been considered as an effective approach to combat global warming. In this paper, Ca 2+ ions were firstly extracted from waste carbide slag, and then facilely transformed to vaterite CaCO 3 via disperse bubbling carbonization method assisted with an air stone. By optimizing the reaction conditions, highly mono-dispersed vaterite CaCO 3 microspheres (VCMs) were obtained. These microspheres consisted of aggregated CaCO 3 nanocrystals , bearing a mesoporous structure. As a proof-of-concept, these mesoporous microspheres were utilized for dye adsorption and electromagnetic (EM) microwave absorption. For the former, the VCMs were used to adsorb Congo red, yielding a fast adsorption time of 9 min and a high adsorption capacity of 138.77 mg/g. For the latter, EM microwave dielectric parameters were measured, and dye-adsorbed VCMs exhibited better microwave-absorption performance with a minimum reflection loss of −43.2 dB, about 3 times of pristine vaterite. To the best of our knowledge, this is the first report of solid-waste-derived VCMs as microwave absorbent and dye adsorbent. Considering the low-cost, eco-friendly and facile preparation and effective utilization of VCMs, our work provides a promising strategy for large-scale carbon capture, solid waste utilization, and treatment of microwave and wastewater pollution.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 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）