REACTIVE & FUNCTIONAL POLYMERS
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2022
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IF 4.966
Xiaoling Fan,Fei Xin,Wenchao Zhang,Haoyu Liu
A novel phosphorus-containing flame retardant PZN@UiO-66-NH 2 was synthesized by covalent bonding between HCCP and UiO-66-NH 2 , and applied in unsaturated polyester (UPR). The Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron energy spectra (XPS), scanning electron microscopy (SEM) was used to confirm the chemical structure of PZN@UiO-66-NH 2 . The appearance of new P-N-C bond indicated that HCCP was successfully reacted with UiO-66-NH 2 . The thermal stability and the flame-retardant properties of the UPR composites were characterized by thermogravimetric analysis (TGA), limiting oxygen index (LOI) and cone calorimeter test. The limiting oxygen index (LOI) of UPR composite with 4 wt% PZN@UiO-66-NH 2 can reach 23.9%. Compared with pure UPR, the peak heat release rate (PHRR) value, total heat release (THR) value and average effective heat of combustion (av-EHC) value of UPR composite with 4 wt% PZN@UiO-66-NH 2 dropped by 36.53%, 28.70%, 23.50%, respectively. The addition of PZN@UiO-66-NH 2 slightly improved the impact performance of UPR composite. PZN@UiO-66-NH 2 can solve UiO-66-NH 2 's agglomeration dilemma in UPR to some extent.
研究领域:
材料科学
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高分子科学
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阻燃性能
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Lifan Li,Deming Zhou,Yifan Zhu,Tonghua Zhang,Zaixing Zhang,Lingxiao Jing
Cotton fabrics has the disadvantages of flammability and breed bacteria, resulting in a risk to the life and health of the user. Hence, it is necessary to address the problems and also can create value-added products at the same time. In this work, a Triazole-halamine-diethyl phosphite (NABTA-DEP) was initially synthesized, followed by its application to cotton fabrics via the thiol-ene click reaction. This preparation process resulted in a multifunctional antibacterial cotton fabrics after chlorination (Cotton-NABTA-DEP-Cl). The results proved that NABTA-DEP was successfully synthesized and grafted onto cotton fabrics. Based on the effect of N-halamine and triazole structures, the antibacterial testing results showed that almost all of S. aureus and E. coli onto the modified cotton were inactivated at a concentration of 5 g/L. The modified cotton fabrics with 6.7 % grafting rate demonstrated satisfied thermal stability and the peak heat release rate (PHRR) and total heat release (THR) values decreased compared with raw cotton fabric. Additionally, loading of 3-mercaptopropyltriethoxysilane (MPTES) could enhance hydrophobicity, which decreased slightly after chlorination, water contact angle (WCA) at 3 s from 131 ° to 127.5 °. The paper offers valuable insights for the development of multifunctional cotton fabrics and expands the application scope.
研究领域:
纺织科学
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材料化学
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生物材料
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2024
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IF 5.6
Peixiao Sun,Hongjian Zhang,Xiaoli Li,Yang Leng,Bin Li,Zhao Wang,Miaojun Xu
With the rapid progress of electronics and 5 G technology, high flame retardancy and low toxicity epoxy resin have been crucial. Hence, the bio-carbon dot (CD) doped with N, P, and Mo elements was prepared by hydrothermal method using corn straw as the biomass carbon source, ethylenediamine as the nitrogen source, and phosphomolybdic acid as the phosphorus and molybdenum source. As a P-containing compound, ADP complexed with CD containing the transition metal element Mo on the surface to obtain complexes (ADP/CD). The flame retardant epoxy resin composites (EP/ADP/CD) were further prepared by ADP/CD as a flame retardant and 4,4′-diaminodiphenylmethane (DDM) as a curing substance. Transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) were used to analyze the shape and chemical structure of CD. The experimental results indicate that when the additive amount of ADP/CD was 4 % (ADP: CD=3.5:0.5), the limiting oxygen index (LOI) of the EP/3.5ADP/0.5CD was 37.5 % (41.5 % higher than pure EP) and reached the UL94 V-0 rate. Cone calorimeter testing revealed a 51.4 %, 39.1 %, 19.6 %, and 70.4 % decrease in the peak heat release rate (pHRR), total heat release (THR), carbon monoxide production (COP), and carbon dioxide production (CO 2 P) of EP/ADP/CD. respectively, then with EP. Furthermore, the mechanical properties of EP/3.5ADP/0.5CD were discussed. Therefore, this work designs a flame-retardant carbon dot , providing a new scheme for creating a multifunctional epoxy resin with flame retardancy, smoke reduction, and toxicity reduction.
研究领域:
材料科学
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化学
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消防安全工程
✓ 已验证
产品关联
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
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2023
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IF 5.9
Yuan Zhang,Xinyu Zhang,Peng Wang,Yudie Liu,Mengting Wan,Kan Zhang
The fabrication of bio-based epoxy resins having better intrinsic flame retardancy and mechanical performances than petroleum-based epoxy thermosets is important for alleviation of energy and health concerns. In this study, bio-based monomer of diglycidyl ether of curcumin (DGEC) was successfully synthesized from a natural and renewable curcumin through a facile one-step process. The biocompatible epoxy resin obtained was then cured with 4,4′-diaminodiphenyl sulfone (DDS) and compared with petroleum-based diglycidyl ether of bisphenol A (DGEBA). The DGEC/DDS exhibited a higher glass-transition temperature (300 °C) than DGEBA/DDS (215 °C), indicating the outstanding heat resistance. The tensile strength of DGEC/DDS was 65.9 MPa, higher than that of DGEBA/DDS (56.1 MPa). Furthermore, DGEC/DDS showed excellent charring ability with char yield of 50.15% at 800 °C in N 2 , which was approximatively 3.5 times as much as that of the cured DGEBA/DDS (14.68%). Microscale combustion calorimeter (MCC) test demonstrated that the DGEC/DDS possessed lower heat release capacity (HRC, 130 J/gk), peak heat release rate (PHRR, 115.0 W/g) and total heat release (THR, 9.9 kJ/g), which were reduced by 80.2%, 74.8% and 59.4%, respectively, compared to those of DGEBA/DDS (658 J/gk, 457.3 W/g, 24.4 kJ/g). The DGEC/DDS passed the UL-94 test and attained the V-0 rating, revealing the good flame retardancy. This work provided an opportunity to prepare bio-based epoxy resins with better properties than DGEBA, which exhibited promising applications in high heat and flame retardancy fields.
研究领域:
材料科学
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化学工程
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可持续化学
✓ 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）