Gels
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2022
·Vol. 8
·期 11
·744
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IF 4.432
Baolu Shi,Long Xie,Bin Ma,Zhiliang Zhou,Baosheng Xu,Lijie Qu
SiO2aerogels have attracted extensive attention due to their unique structural characteristics, which exhibit many special properties, especially good optical transparency. As far as we know, the sol-gel stage during the synthesis of aerogel plays an important role in the construction of the gel skeleton. In this study, we adjusted the amount of silicon source and catalyst to explore the best scheme for preparing highly transparent SiO2aerogels, and further clarify the effects of both on the properties of SiO2aerogels. Results indicated that the pore size distribution was between 10 and 20 nm, the thermal conductivity was between 0.0135 and 0.021 W/(m·K), and the transmittance reached 97.78% at 800 nm of the aerogels, better than most studies. Therefore, it has the potential to be used in aerogel glass for thermal insulation.Keywords:SiO2aerogels;high transparency;thermal insulation;mesoporous materials
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER DEGRADATION AND STABILITY
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2013
·
IF 2.77
Yuhang Cai,Mengmeng Zhao,Henti Wang,Yongjin Li,Zhigang Zhao
Flame-retardant nanocomposites with high transparency based on poly (vinyl alcohol) (PVA) and pseudo-boehmite nanorods have been fabricated by synthesis of pseudo-boehmite nanorods and subsequent solution blending with PVA. The morphology and physical properties of PVA/pseudo-boehmite nanocomposites have been characterized systematically. Scanning electron microscopy investigations showed the homogeneous dispersion of pseudo-boehmite nanorods within PVA matrix even at very high nanorods loadings. The nanocomposites with 37.5 wt% pseudo-boehmite nanorods exhibit limit oxygen index (LOI) as high as 30.0 with the transmittance of more than 90% at the visible region and the enhanced refractive index . Moreover, the incorporation of the pseudo-boehmite nanorods increases the modulus and the tensile strength of PVA, indicating the significantly enhanced surface hardness of the nanocomposite. It is considered that the prepared PVA nanocomposites are not only useful as flame-retardant fibers, a long term pursued target for PVA fabrics, but also as optical appliances with its excellent transparency and high refractive index.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Chengyu Shi,Jianli Wang,Ying Zhou,Xinyuan Lu,Gang Chang,Aizhao Pan,Ling He
Cultural relics reflect the vitality and creativity of human beings but are being irreversibly damaged with the current protective materials exhibiting high brittleness , easy crack and unsatisfactory protection. We fabricated a POSS-based polymer POSS- g -(PGMA- co -PFMA) 2 with high transparency, high hydrophobicity and adhesive nature by SI-ATRP. In addition to reducing the phase separation during film formation, the POSS-based polymer also improved the transparency (up to 99 %). The protected sandstone presented almost no changes (ΔΕ ⁎ = 1.34) on the chroma compared to the pristine sandstone. The polymer showed good surface hydrophobicity (glass: 100–105°; sandstone: 131°) and adhesive properties (0.44–2.59 MPa) which varied based on solvents. With increasing GMA content, there was gradual increase in the adhesive strength (0.59–2.68 MPa). Meanwhile, the POSS- g -(PGMA- co -PFMA) 2 film presented excellent freeze-thaw resistance and salt tolerance. As a kind of hydrophobic and bonding coating material suitable for harsh environments with high hydrophobic, high transparency, high thermal stability , and durability, it provides a new solution to solve the severe problem of cultural relics protection with a wide application prospect.
研究领域:
材料科学
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文化遗产保护
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaoqing Ming,Changgeng Zhang,Junjie Cai,He Zhu,Qi Zhang,Shiping Zhu
The rapid development of soft electronics has revitalized the research of conducting elastomers. However, the design of conducting elastomers having high stretchability and good transparency still remains a considerable challenge. In this study, we develop a highly transparent, stretchable, and conducting ionoelastomer based on a poly(ionic liquid) in which cations are fixed to a stretchable elastomeric network and counter anions are mobile. The ionoelastomer solves the dilemma of simultaneous transparency and stretchability in the design of traditional conducting elastomers, possessing good transparency (96%) with an extraordinarily high stretchability, up to a limiting strain of 1460%. Moreover, this novel material is completely nonvolatile and nonhygroscopic, endowing the ionoelastomer with highly stable thermal, environmental, electrochemical, and mechanoelectrical properties. An underwater sensor based on the ionoelastomer is developed with good performance in an aqueous environment. Also, a transparent dielectric elastomer actuator (DEA) is demonstrated using the ionoelastomer. It is believed that the ionoelastomer would pave the way to develop exceptional conducting elastomers toward next-generation soft electronics.
研究领域:
材料科学
·
软电子技术
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传感器技术
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2024
·
IF 5.8
Kun Liu,Yawen Fu,Qiqi Dai,Haoyun Tan,Zhuowei Gu,Qiaoqiao Xiong,Shuai Yang,Mingming Zhang,Jianxiang Feng,Wenjun Yi,Lijun Li
Pure multi-block copolymers and deformed multi-block copolymers have unique applications in the field of high-performance thermoplastic elastomers, resins and rubber materials. For styrene ( S ) and conjugated 1,3-dienes ( e.g. 1,3-pentadiene, P ) monomers, living anionic polymerization ( LAP ) has significant advantages in precise control of molecular weight and its distribution and precise control of microstructure and the sequence distribution. Subsequently, the post-polymerization modification strategy including epoxidation can further expand the application field of such polymer materials. Herein, a series of novel symmetrical triblock copolymers of different compositions with homo-polystyrene as end-blocks and strictly alternating sequence as mid-block, poly( S )- b -poly( S - alt - P )- b -poly( S ) ( SSPS ), were synthesized in cyclohexane by the classical three-step sequential feeding method using n -BuLi as initiator. The effect of the block ratio of SSPS triblock copolymer on impact strength, flexural strength and yield strength of transparent resin products was studied in detail. In addition, quantitative epoxidation post-polymerization functional modification was performed to obtain the novel triblock copolymer product which had a high-polarity and high-transparent thermoplastic resin with well-defined structure and quantitative degree of epoxidation ( ED ). All these novel copolymers before and after modification were characterized by 1 H NMR, 13 C NMR, FTIR, DSC and GPC.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2025
·
IF 4.7
Xiaoying Xin,Yuting Tian,Wanxiong Yong,Jun Hu,Miaomiao Liu,Weining Liu,Yanling Chen,Guodong Fu
Polysiloxane materials have significant potential for diverse applications in functional coatings, owing to their distinctive Si–O–Si backbone structure and exceptional physical and chemical properties. Interest in functional polymer-inorganic nanocomposites has grown due to their versatility, malleability, low polymer matrix density, and heat resistance and stiffness of inorganic constituents. Nonetheless, developing multifunctional composites with high transparency, frost resistance, and flame retardancy poses a notable challenge. In this study, an amino-modified silica (NH2–SiO2) nanoparticle-doped polysiloxane composite coating (PSC-NSy) was devised and fabricated using the sol–gel technique. By incorporating polyvinylpyrrolidone (PVP), hydrogen bonding with the polysiloxane polymer network was achieved, forming an organic–inorganic interpenetrating network structure. This approach enhanced interface interactions, facilitated the uniform dispersion of inorganic nano SiO2, and conferred outstanding transparency (over 88%) and flexibility to the polysiloxane composite coating. The coating surface remained crack-free after 100 cycles of bending stress. Furthermore, it exhibits excellent hydrophobicity, low surface energy, and low ice adhesion strength (22.42 kPa), enabling it to be highly effective against ice and frost. The composite material also possesses high thermal stability, and the limiting oxygen index (LOI) of the PSC-NS10 coating can reach 28.27%, making it a promising candidate for flame-retardant materials. The straightforward manufacturing process of the polysiloxane composite coating proposed in this research endows it with substantial industrial application potential in a multitude of fields.
研究领域:
材料科学
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高分子科学
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纳米技术
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表面工程
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涂层技术
✓ 已验证
产品关联
DOI
高影响因子
Matter
·
2025
·
IF 17.5
Bohan Li,Yongsheng Sun,Yuzhen Wang,Jiance Jin,Kai Han,Yan Xu,Zhiguo Xia
Highly transparent and large-area scintillator film is highly desirable for next-generation X-ray imaging and detection. Herein, we develop a rapid and in situ synthesis strategy to fabricate polymer scintillator film composed of (C 14 H 15 P) 4 Cu 4 I 4 glassy cluster gel (M1-GCG). The large-area M1-GCG film of 20 × 12 cm was obtained by in situ UV photopolymerization within 30 s, showing ∼90% transmittance in the broad spectral region of 400–1,000 nm, in which Cu(I) iodide clusters coordinated by phosphine ligands are generated as a glassy form in the polymer network structure and uniformly distributed under supramolecular interactions, as the polymer monomer is polymerized and cross-linked under ultraviolet light. We develop a brand-new chemical synthesis route toward polymer-based composite scintillator film, and the M1-GCG film with high transparency and scintillation properties, as well as high-resolution X-ray imaging ability, shows extraordinary potential for large-area medical imaging and industrial non-destructive detection.
研究领域:
材料科学
·
核工程
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光学材料
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辐射探测
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高分子化学
·
医学成像技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY AND BUILDINGS
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2025
·
IF 7.1
Dongmei Lei,Yu Li,V.H. Giang Phan,Ngoc-Thuy Huynh,Yi Li
Many studies have shown that buildings account for 30–40 % of total energy consumption worldwide. Due to the high thermal diffusion coefficient of ordinary windows, energy consumption of traditional buildings is relatively high. Therefore, it is very important and necessary to develop building energy-saving technologies to solve these problems. In this work, an anionic surfactant (sodium dodecyl sulfate) with adjustable critical solution temperature is introduced into polyvinyl alcohol (PVA)-based hydrogels to render the hydrogels phase-transition ability. By adding binary solvents of water and glycerol (GL), the prepared hydrogels show outstanding anti-freezing and anti-drying properties as well as high transparency. In addition, the hydrogels have excellent mechanical and flame-retardant properties. As smart curtains, the hydrogel reported in this work can protect privacy at night, allowing the sunlight to pass through during the day (without consuming additional energy) and effectively reducing indoor temperatures (up to 4.9 °C). This hydrogel not only reduces indoor temperature and saves energy, but also has the potential for large-scale industrialization because of the simple preparation process and the use of cost-effective raw materials. This allows the hydrogel to be used in applications such as building facades, energy saving, and privacy protection.
研究领域:
材料科学
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高分子科学
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建筑技术
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能源效率
·
软物质物理
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zhengyuan Li,Yizhe Liu,Xiaowei Pei,Yang Wu,Feng Zhou
Polymer brushes surface, one of the most researched bionic aqueous lubrication materials, has ultralow friction coefficient underwater but suffer from high friction in air which leads to the worse wear resistance in dry condition. In this work, dry/wet adaptive polymer brushes coating was fabricated by grafting hydrophilic poly 3-sulfopropyl methacrylate potassium salt (pSPMA) and hydrophobic polydimethylsiloxane (PDMS) brushes simultaneously on an inorganic silica sol layer via surface-initiated atom transfer radical polymerization (SI-ATRP) and click chemistry. The hybrid coating achieves self-lubrication in the air and superlubricity underwater through the preferential assembly and high hydration of hydrophobic and hydrophilic components in different ambiance. More importantly, it maintains high transparency, antifouling, antifogging properties, and exceptional wear resistance that can withstands 1200 abrasion cycles at 5 N load without significant wear. These features make the coating highly promising for practical applications in optical devices, touchscreens, underwater systems, and other environments requiring reliable lubrication across both wet and dry conditions. This strategy overcomes the limitations of conventional polymer brushes, enabling robust lubrication across wet/dry conditions and accelerating practical applications.
研究领域:
材料科学
·
表面工程
·
摩擦学
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聚合物化学
·
仿生材料
✓ 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）