COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2021
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IF 4.539
Xu Ouyang,Lan Zhou,Xinliang Xu,Zhangyan Yang,Lei Wang,Lizhe Lu,Guojin Liu,Guoqing Zhang
In order to improve the encapsulation efficiency and shell properties of PMMA capsules, poly(MMA-co-TMPTA)/fragrance microcapsules were fabricated by in-situ polymerization with Trimethylolpropane Triacrylate (TMPTA) as the co-monomer. The poly (MMA-co-TMPTA)/fragrance microcapsules were characterized by scanning electron microscopy (SEM), thermogravimetric analyzer (TGA), pyrolysis gas chromatography-mass spectrometer (PGC-MS) and electronic nose (PEN-3). The results indicate that the poly(MMA-co-TMPTA)/fragrance microcapsules present pomegranate shape with rough and sunk surface and have the particle size in the range of 10−20 μm. poly(MMA-co-TMPTA)/fragrance microcapsules has good thermal stability, high encapsulation efficiency of 91.6 % and good slow-release property, and the fragrance on the fabric can be retained for more than 3 months.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yutong Chen,Zhitao Yin,Yue Zhao,Zhengyang Jin,Seeram Ramakrishna,Yan Xu,Xujing Zhang
Digital Light Processing (DLP) offers the potential for personalized bone implants. Within this method, the interfacial bonding capacity of inorganic/organic materials and the solid-phase content of the slurry emerge as primary factors influencing scaffolds mechanical properties. In this research, KH571 was applied to establish an interfacial “molecular bridge”, adopting in situ coupling technology to forge stable covalent bonds between calcium silicate (CSi) and KH571. Chemical grafting, surface photografting, and photopolymerization techniques were then utilized to construct a photo-crosslinked network by CSi-KH571-TMPTA/HDDA slurry, thereby transforming the weak physical connections at the interface into strong chemical bonds. Consequently, the curing capacity and mechanical properties of the scaffolds were enhanced. Further control grain size, crystal phase transition, and shrinkage of CSi-KH571 scaffolds, post-treatment sintering processes were employed, resulting in scaffolds with a high content of β-CSi. Moreover, the optimal process parameters were selected concerning grafting rate, chemical composition, microscopic morphology, crystalline transformation, dimensional accuracy, mechanical properties, biodegradability and biocompatibility of CSi-KH571. The elastic modulus and compressive properties of CSi25-55 scaffolds exhibited a notable improvement of 29.71 % and 59.30 %, respectively, compared to CSi-50 scaffolds. By regulating the phase composition of CSi, CSi25-55 scaffolds were designed to possess a controllable degradation. In vitro cell culture experiments validated its excellent biocompatibility and promoted the proliferation and differentiation of bone marrow mesenchymal stem cells (BMSCs) as well as the deposition of bone matrix. Herein, a novel and sustainable approach has been promoted for enhancing the interfacial bonding capacity of inorganic/organic materials and the solid-phase content of printing slurry, which lays the foundation for the printing of high-resolution degradable bioceramic scaffolds.
研究领域:
材料科学
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生物医学工程
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组织工程
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增材制造
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产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
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2020
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IF 4.469
Yaoyao Liu,Tingting Wang,Chuanbao Xie,Xiujuan Tian,Liang Song,Lei Liu,Zhongwei Wang,Qing Yu
A series of new naphthyl-based acylphosphine oxides (N1–N3) have been designed and synthesized. The obtained compounds could be used in the photo-initiated free radical polymerization (FRP). The performances of N1–N3 in the FRP of trimethylolpropane triacrylate (TMPTA) and their UV–vis spectra were evaluated and compared with 2,4,6-trimethyl(phenyl)diphenyl oxide (TPO, a commercial photoinitiator). Results showed that N1–N3 possessed higher molar absorption coefficients and wider absorption wavelength than TPO. Under the same reaction conditions, N3 exhibited the best double bond conversion (DC) of TMPTA in the tested photoinitiators. Moreover, the calculated migration of N1–N3 of the solidified samples was 1/7, 1/3 and 1/23 of TPO, indicating the lower migration properties. Possible reasons of the performance of N1∼N3 were proposed.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
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2026
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IF 3.9
Bole Chen,Xinyang Zhao,Yifan Liu,Xiangqi Xu,Luran Chun,Zhouju Zhong,Jun Nie,Jingfang Li
Achieving thick coatings (>200 μm) remains a significant challenge in the field of photopolymerization, primarily due to light attenuation. Despite the use of photobleaching initiators, rapid polymerization frequently results in the formation of a crosslinking gradient and the development of internal stresses, which adversely affect the mechanical properties, particularly the toughness, of the photo-cured materials. In this study, a novel macrocyclic photobleaching initiator [2](BPC)[2](C12) was developed specifically for thick-coating photopolymerization applications. In contrast to the photobleaching mechanism associated with the commercial initiator TPO, [2](BPC)[2](C12) exhibits a deeper color, which reduces light penetration and significantly decelerates the photobleaching rate, thereby generating a distinctive light-gating effect. This effect modulates the polymerization kinetics by inhibiting premature surface gelation and mitigating both the crosslinking density gradient and internal stress. As a result, the curing process is optimized in terms of uniformity, while maintaining a high degree of monomer crosslinking. To further elucidate the underlying mechanisms, this study employs density functional theory (DFT) calculations, steady-state photolysis, and in situ nuclear magnetic resonance (NMR) analysis, providing detailed insight into the photobleaching behavior and progressive curing mechanism of [2](BPC)[2](C12) in the presence of an EDB system. The findings from compression tests demonstrate that this progressive curing strategy significantly enhances the mechanical toughness of thick coatings. Specifically, for cylindrical poly(TMPTA) specimens (1 cm in diameter × 1 cm in height), the strain energy density increased from 0.6415 MPa to 0.9207 MPa, reflecting a 43.5% improvement. Moreover, the maximum strain exhibited a substantial increase, from 33% to 77%. This research not only introduces a new molecular platform for photopolymerization but also provides critical mechanistic insights that will aid in the rational design of high-performance photocuring systems for thick coatings.
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
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2016
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IF 3.42
Danfeng Cao,Yingchao Zhang,Zhanchen Cui,Yuanyuan Du,Zuosen Shi
In order to obtain an ideal material using for artificial corneal skirt, a porous polymer hydrogel containing 2-hydroxyethyl methacrylate (HEMA), trimethylolpropane triacrylate (TMPTA) and butyl acrylate was prepared through one-step radical polymerization method and the usage of CaCO 3 whisker as porogen. The physical-chemical properties of the fabricated polymer hydrogel can be adjusted by CaCO 3 whisker content, such as pore size, porosity, water content of materials and surface topography. Then a series of cell biology experiments of human corneal fibroblasts (HCFs) were carried out to evaluate its properties as an artificial corneal skirt, such as the adhesion of cells on the materials with different pore size and porosity, the apoptosis on materials with different characteristics, the distribution of the cells on the material surface. The results revealed that high porosity not only could improve water content of hydrogel, but also strengthen the adhesion of HCFs on hydrogel. In addition, high porosity hydrogel with the whisker shape of pores showed much elongate spindle-like morphology than those low porosity hydrogels. MTT assay certified that the resulted polymer hydrogel material possessed excellent biocompatibility and was suitable for HCFs growing, making it promising for being developed as artificial corneal skirt.
研究领域:
材料科学
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组织工程
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眼科
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）