JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 4
·1-13
·
IF 2.8
Kang Shuanghao,Li Tianle,Jiang Han,Fu Ziheng,Gao Renjin,Chen Qinhui,Xia Jianrong
Optically transparent pressure-sensitive adhesives (PSAs) present several challenges. Conventional PSAs typically improve cohesive strength through chemical crosslinking; however, this approach not only reduces adhesion but also diminishes light transmittance. In this study, we explored hydrogen bonding crosslinking as a replacement for conventional chemical crosslinking and successfully synthesized the crosslinker UPyHCBA, which contains UPy units capable of forming self-complementary dimers through quadruple hydrogen bonds. A transparent acrylic PSAs incorporating the UPyHCBA monomer was then synthesized via solution polymerization. By modifying the ratio of UPyHCBA, we thoroughly investigated the impact of multiple hydrogen bonds on the molecular weight distribution, adhesive properties, thermal properties, light transmission, rheological behavior, and photoluminescence spectral properties of a specific optically transparent pressure-sensitive adhesive (PSAs).
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
POLYMER
·
2018
·
IF 3.483
Ning-Bo Li,Meng Wang,Ling-Xiang Guo,Bao-Ping Lin,Hong Yang
New generation spacecraft technology requires more and more deployable, light-weight, thin polymer films , in particular novel polyimide materials with high optical transparency, excellent foldability and superior flexibility. In this work, we develop a highly transparent, ultra-foldable, ultra-flexible and ultra-processable polyimide composite material by incorporating 5–8 wt% of ionic liquid 1-ethyl-3-methylimidazolium bis((trifluoromethyl)sulfonyl)imide into colorless polyimide matrices. This 23-μm-thick polyimide composite film exhibits a high optical transmittance of 90.4% even at 450 nm wavelength and an incredibly low cutoff wavelength of 273 nm. It is an extremely strong and flexible material, with a tensile modulus of 844.6 MPa, a tensile strength of 48.2 MPa, a high elongation at break of 108.4%, and an extraordinary minimum bend radius of 1 μ m. It can be easily folded in half 4 times or twisted by 900° without any crack damages. Moreover, it has a low expense cost and good film processability for industrialization manufacturing. All of these superior performances render this ionic liquid/polyimide composite an ideal structural material for solar sails, solar arrays and thin-film photovoltaics , etc.
研究领域:
材料科学
·
航天工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 65
·40996-41003
·
IF 3.108
Tianyun Li,Huahua Huang,Lei Wang,Yongming Chen
Three kinds of naphthalene-containing diamines with –H, –CH3 or –CH(CH3)2 substituents at the ortho-positions of the aniline ring including 4,4′-(naphthalen-1-ylmethylene)dianiline (BAN-1), 4,4′-(naphthalen-1-ylmethylene)bis(2,6-dimethylaniline) (BAN-2) and 4,4′-(naphthalen-1-ylmethylene)bis(2,6-diisopropylaniline) (BAN-3) were synthesized via a simple one-step electrophilic substitution reaction. These diamines were then reacted with three commercial dianhydrides, via chemical imidization under microwave irradiation, to obtain nine types of polyimide (PI). It was found that the introduction of alkyl side groups can improve the solubility and optical transparency of PIs. Moreover, compared with BAN-2 based PIs containing –CH3 groups, BAN-3 based PIs containing –CH(CH3)2 groups exhibited better solubility and optical transparency (transmittances at 450 nm of over 86%). Meanwhile, due to the presence of the rigid naphthalene side groups, all the PIs possessed high thermal stability with a glass transition temperature (Tg) of over 290 °C and a decomposition temperature at 5% weight loss of over 510 °C under nitrogen. Furthermore, the Tg of PI-2B composed of BAN-2 and 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) was found to be as high as 387 °C, which is comparable to that of the commercial and conventional PI material (Kapton®, Tg = 390 °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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Mingjian Zhou,Yang Hu,Chenze Qi,Dongpeng Yang,Shaoming Huang
Photonic crystals (PCs) have attracted great interest and wide applications in displays, printing, anti-counterfeiting, etc. However, two main challenges significantly hinder their applications: 1) the tradeoff between high optical transparency across the whole visible range and brilliant colors requiring a large refractive index contrast (Δn), and 2) the way of regulating structural colors by altering tens of different sizes. To address these issues, a new type of metal–organic framework (MOF)-based transparent photonic crystal (TPC) has been fabricated through self-assembling MOF particles into three-dimensional ordered structures which were then infiltrated by polydimethylsiloxane (PDMS). Compared to conventional PCs, these TPCs exhibit 1) both brilliant forward iridescent structural colors and high transmittance (>75 %) across the whole visible spectra range, and 2) conveniently adjustable colors based on bidisperse particles. The unique color-generating mechanism of the light diffraction by each plane lattice and the small Δn between MOF particles and PDMS are the keys to TPCs’ characteristics. Moreover, the prepared invisible anti-counterfeit labels can reversibly hide-reveal patterns with elaborate and exchangeable color contrast in a non-destructive way, showing potential applications in anti-counterfeiting, information encryption, and optical devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
HIGH PERFORMANCE POLYMERS
·
2012
·
IF 0.884
Jie Shen,Xiaolong Li,Ying Zhang,Wenhao Wang,Zushun Xu,Kelvin W. K. Yeung,Ming Xu,Changfeng Yi
A novel fluorinated pyridine-containing aromatic diamine monomer, 4-phenyl-2,6-bis[2-(4-amino-2-trifluoromethyphenoxy)phenyl]pyridine (o, p-6FPAPP), was prepared in a three-step synthetic route. This aromatic diamine was then employed to synthesize a series of fluorinated pyridine-containing polyimides (PIs) by polycondensation with various aromatic dianhydrides via the conventional two-step method. The inherent viscosities of the resulting poly(amic acid)s (PAAs) and PIs were in the range of 0.71–0.89 and 0.62–0.84 dL/g; all the PIs obtained by chemical imidization were readily soluble in common organic solvents such as N, N-dimethylformamide (DMF), N, N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), dimethyl sulfoxide (DMSO), tetrahydrofuran (THF) and so on. Meanwhile, transparent, strong and flexible PI films were obtained, which had good thermal stability, with the glass transition temperature (Tg) of 195.2°C–232.7°C, the temperature at 10% weight loss of 530.2°C–546.0°C in nitrogen atmosphere, and good optical transparency with the cutoff wavelengths of 354–382 nm, as well as outstanding mechanical properties with tensile strengths of 96.4–105.8 MPa, tensile modulus of 1.57–1.88 GPa and elongations at break of 9.5%–13.4%. The PI films were also found to possess low water uptake of 0.52%–0.67%.
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 SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 14
·11646-11653
·
IF 2.22
Shi Kai,Su Junhong,Hu Kai,Liang Haifeng
A wide-spectrum high-transmittance copper mesh was designed and fabricated for effective shielding of electromagnetic waves. Using mask lithography and chemical etching, the copper mesh can be easily fabricated. The thickness of the copper mesh is uniform, whether at the crossing section and the copper wire. The average transmittance of the copper mesh from ultraviolet band to near-infrared band (200–2500 nm) is 96%, in agreement with the designed results. The electromagnetic interference shielding efficiency (EMI SE) is to 16 dB in Ku-band. The result of X-ray photoelectron spectroscopy analysis shows that a large amount of Cu 2+ on the surface is reduced to Cu 0 and Cu + after annealing. As result, the EMI SE value of copper mesh has increased by 1.5 dB in Ku-band. We envision that the copper mesh can provide a good solution for optically transparent electromagnetic interference shielding.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 5
·3382-3390
·
IF 4.186
Chengrui Liu,Juan Jiang,Guohong Zhou,Tianjin Zhang,Song Hu,Lin Gan,Xianpeng Qin
Highly transparent cerium-doped yttria ceramics were fabricated via a pressureless sintering method with an addition of 10 at.% La 2 O 3 and 1 at.% ZrO 2 as a binary sintering additive. With an increase in the Ce doping concentration from 0 to 3 at.%, the optical absorption edge of yttria ceramics exhibited a significant red shift from 290 to 380 nm as a result of the 4f–5d transition of Ce 3+ and the charge transfer of Ce 4+ (i.e., Ce 4+ +e – →Ce 3+ ). For a 2-mm thick sample doped with 3 at.% Ce, the total ultraviolet radiation (UV) transmittance (220–400 nm) is only 1.7%, indicating a nearly complete UV absorption. Meanwhile, the specimens possess high in-line transmittance levels in both the visible and the infrared regions (i.e., >70% at 450 nm and ∼80% at 1100 nm). Additionally, the present specimens were confirmed to have good enough mechanical strength levels (∼165 MPa) and thermal conductivity (∼5 W/m·K), which are comparable or even better compared to those of previously reported transparent yttria ceramics. The results of this work indicate that cerium-doped transparent yttria ceramics are promising candidate materials for full-band UV-shielding window applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Penghui Chen,Qian Wang,Dianjun Hu,Danyang Zhu,Haohong Chen,Zhengfa Dai,Qiang Liu,Jiang Li
8YSZ precursor was synthesized by the co-precipitation method using ammonia as the precipitant. The influences of calcination temperature on the phase, morphology and dispersity of 8YSZ nanopowders were investigated. It was found that the 8YSZ nanopowders calcined at 800 °C had the best sinterability with the mean particle size of 14.5 nm. 8YSZ ceramics were then fabricated by air pre-sintering at 1250–1325 °C followed by HIP post-treatment at 1550 °C. The influences of pre-sintering temperature on the microstructure and optical transparency of 8YSZ ceramics were studied. It was found that the 8YSZ ceramics pre-sintered at 1300 °C had a suitable microstructure. The HIP post-treatment temperature was successfully reduced by 200 °C for the 8YSZ transparent ceramics from co-precipitated powders compare with our previous works. In-line transmittance of the 8YSZ ceramics (1.0 mm in thickness) reached 65.7% at 800 nm and the average grain size was 25 μm.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
DESIGNED MONOMERS AND POLYMERS
·
2012
·
IF 1.444
Shanyin Yan,Wenqiu Chen,Wei Yan,Mingfu Huang,Chuan Chen,Zushun Xu,Kelvin W. K. Yeung,Changfeng Yi
A novel pyridine-containing aromatic diamine monomer, 4-(4-trifluoromethylphenyl)-2,6-bis[3-(4-aminophenoxy)phenyl]pyridine (m,p-3FPAPP), was successfully synthesized by a modified Chichibabin reaction of 4-trifluoromethylbenzaldehyde and a substituted acetophenone, 3-(4-nitrophenoxy)acetophenone
(m,p-NPAP), followed by a reduction of the resulting dinitro compound 4-(4-trifluoromethylphenyl)-2,6bis[3-(4-nitrophenoxy)phenyl] pyridine (m,p-3FPNPP) with Pd/C and hydrazine monohydrate. The aromatic diamine was employed to synthesize a series of pyridine-containing
polyimides by polycondensation with various aromatic dianhydrides in N,N-dimethylformamide (DMF) via the conventional two-step method, and further thermal or chemical imidization forming polyimides. The inherent viscosities of the resulting poly(amic acid)s and polyimides
were 0.62–0.89 and 0.58–0.69 dl/g, and most of the polyimides obtained by chemical imidization were readily soluble in common organic solvents such as DMF, N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP) and tetrahydrofuran (THF). Meanwhile, strong
and flexible polyimide films were obtained, which had good thermal stability, with a glass transition temperature (T
g) of 234.4–246.6°C and the temperature at 10% weight loss of 561.4–600.6°C in nitrogen atmosphere, and good optical transparency with the
cut-off wavelengths of 369–378 nm, as well as outstanding mechanical properties with tensile strengths of 89.5–96.4 MPa, a tensile modulus of 1.52–1.63 GPa and elongation-at-break of 7.2–8.7%. The polyimide films also were found to possess low water uptake (0.61–0.79%).
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Forests
·
2024
·Vol. 15
·期 2
·384
·
IF 2.4
Yang Liu,Yi Zhang,Jianhui Guo,Gaiping Guo,Cheng Li
Transparent wood has excellent optical and thermal properties and has great potential utilization value in energy-saving building materials, optoelectronic devices, and decorative materials. In this work, transparent wood with soft-/hard-switchable and shape recovery capabilities was prepared by introducing an epoxy-based polymer with a glass transition temperature of about 0 °C into the delignified wood template. The epoxy resin was well filled in the pore structure of the delignified wood, and the as-prepared wood exhibited excellent transparency; the optical transmittance and haze of the transparent wood with a thickness of 2.0 mm were approximately 70% and 95%, respectively. Because the glass transition temperature of the epoxy-based polymer was about 0 °C, the prepared transparent wood was rigid below 0 °C and flexible above °C; meanwhile, the transparent wood exhibited shape change and shape recovery properties. Incorporating optical transparency and soft-/hard-switchable ability into the transparent wood opens a new avenue for developing advanced functional wood-based materials.
研究领域:
材料科学
·
林业工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Xi Ren,Duanyi Li,Zhibin He,Ruixuan Wang,Changxu Yang,Shujun Han,Haifeng Yu,Jingang Liu
Fluorine-free, fully aromatic polyimide (PI) films, characterized by the excellent optical transparency and high-temperature endurance, have been successfully synthesized through either homopolymerization or copolymerization of an ester-containing diamine, 2-(4-aminobenzoate)-5-aminobiphenyl (ABABP) and two distinct dianhydrides: 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride (BPADA) and 9,9-bis[4-(3,4-dicarboxyphenoxy)phenyl]fluorene dianhydride (BPFPA). Owing to the good solubility of the developed PI-I to PI-V resins in polar aprotic solvents, particularly in N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP) and N,N-dimethylformamide (DMF), the synthesis process was performed through a two-stage chemical imidization technique. The polymer solutions of PI-I to PI-V in DMAc were fabricated into films that showed exceptional optical clarity, featured with the ultraviolet cutoff wavelength (λ) below 375 nm, the light transmission at 450 nm (T 450 ) surpassed 80%, the b * values (CIE indices) below 4.5, and the turbidity percentage (haze values) under 0.5%. Despite the fact that a higher molar concentration of BPFPA components in the dianhydride segments led to a decline in the optical characteristics of the films, the thermal resistance was concurrently enhanced. The resulting copolymerized PI films exhibited a glass transition temperature (T g ) over 264.9°C, along with the coefficients of linear thermal expansion (CTE) values of 56.7 ~ 65.9 ppm/K in temperature range of 50 ~ 200°C.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Zhijun Liu,Guoming Yuan,Hui Yang,Kunxin Wang,Yanghan Tao,Kun Wu,Jun Shi,Li Yang
Pressure sensitive adhesive (PSA) has great application potential in electronic packaging, flat panel display bonding and other fields. However, the low cohesion strength of these PSAs leads to their inherent low mechanical strength, which seriously hinders their application. In this study, PSA with dual network (DN) structure was prepared. Long chain polyurethane diacrylate (HPA) not only provides covalent cross-linking for linear acrylic polymers, but also provides non-covalent cross-linking of chain entanglements and hydrogen bonds, giving PSA excellent cohesion strength. DN-PSA not only has excellent bonding properties, but also has higher shear strength, its values are 21.9 N/25 mm and 92.5 KPa, respectively, which are increased by 16.5 % and 72.7 % compared with the control group. Although the DN structure reduces the elongation at break of PSA, it greatly increases the tensile strength of PSA, reaching 0.19 MPa. In addition, the PSA also has better heat resistance and higher light transmittance (> 90 %), which indicates that it is suitable for applications requiring high adhesion, cohesion and optical clarity, such as the bonding of flat panel displays.
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
危险品化学品经营许可证（带存储）