Frontiers of Chemical Science and Engineering
·
2020
·Vol. 15
·期 2
·340-350
·
IF 3.552
Zhang Wei,Xu Boren,Gong Caihong,Yi Chunwang,Zhang Shen
In this study, a facile and environmentally friendly method with low energy consumption for preparing nanoscale AgCl and BaSO 4 co-precipitates (AgCl@BaSO 4 co-precipitates) was developed based on the metathetical reaction. Then, the dried co-precipitates were melt-compounded with polyamide 6 (PA6) resins at a specified mass ratio in a twin-screw extruder. The results demonstrated that in the absence of any coating agent or carrier, the nanoparticles of AgCl@BaSO 4 co-precipitates were homogeneously dispersed in the PA6 matrix. Further analysis showed that after the addition of AgCl@BaSO 4 co-precipitates, the antibacterial performance, along with the flame-retardance and anti-dripping characteristics of PA6, was enhanced significantly. In addition, the PA6 composites possessed high spinnability in producing preoriented yarn.
研究领域:
材料科学
·
纳米技术
·
高分子化学
✓ 已验证
DOI
高影响因子
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
·
2024
·
IF 2.3
Boren Xu,Chunwang Yi
In this work, by simply using barium hydroxide (Ba(OH)2·8H2O) to react with cupric(II) sulfate pentahydrate (CuSO4.5H2O) in methanol under room temperatures, cupric oxide and barium sulfate co-precipitates (CuO@BaSO4) were one-step prepared, and the methanol can be recycled after separating the co-precipitates. The CuO@BaSO4 co-precipitates were then blended with polyamide 6 (PA6) to prepare PA6-CuO@BaSO4 composites and composites fiber via melt extrusion and melt spinning methods to improve the mechanic and antibacterial properties synchronously. The as-prepared CuO@BaSO4 co-precipitates have a regular size of 30–50 nm and are highly compatible with the PA6 matrix. Further investigations disclosed that the CuO@BaSO4 co-precipitates had a good dispersion in the PA6 matrix and synchronously improved the mechanical properties and thermal stability. What’s more, the PA6-CuO@BaSO4 composites showed excellent antibacterial performance and high spinnability. The bactericidal rate reached 100% when adding tiny content (0.24 wt%) of Cu2+ into PA6 fibers.
研究领域:
材料科学
·
高分子化学
·
生物医学工程
✓ 已验证
DOI
高影响因子
Polymers
·
2026
·Vol. 18
·期 17
·2072
·
IF 5.8
Jia-Hao Wang,Ze-Yong Zhao,Yu-Zhong Wang
Polymeric antistatic additives offer improved resistance to migration compared with low-molecular-weight agents, but high loadings are generally required to establish effective charge-dissipation pathways in nonpolar polypropylene (PP). Herein, a series of quaternary ammonium salt-functionalized polyamide 6/polyethylene glycol elastomers (QASPA6PEG) was synthesized by melt copolymerization and used as multifunctional antistatic additives for PP. Increasing the nominal QAS content decreased the surface resistivity of the elastomers from 3.24××109Ω to 9.71 × 108Ω. The elastomers were subsequently melt-blended with PP at loadings of 10–20 wt% using maleic-anhydride-grafted polypropylene as a compatibilizer. The surface resistivity of the blends decreased with increasing QAS content and elastomer loading, consistent with the formation of increasingly interconnected ion-conducting domains. The blend containing 20 wt% 0.4QASPA6PEG exhibited surface resistivities of 3.64××1011Ω and 4.69××1010Ω on days 0 and 60, respectively. Its saturated water absorption reached 4.38%, compared with 0.27% for neat PP, supporting a moisture-assisted ionic conduction mechanism. The measured bromine content remained nearly unchanged after 60 days of storage, indicating limited loss of the QAS-containing component. In addition to improving charge dissipation, QASPA6PEG enhanced the ductility and impact resistance of PP. At a loading of 20 wt%, 0.4QASPA6PEG increased the elongation at break from 358 ± 23% to 690 ± 81% and the notched impact strength from 3.16 ± 0.37 to 4.93 ± 0.45 kJm−2. These results demonstrate that covalently introducing ionic structures into PA6/PEG elastomers is an effective strategy for coupling antistatic modification with toughening in PP.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER
·
2023
·
IF 4.6
Zhike Li,Anyu Luo,Rui Zhou,Xin Li,Haiyan Li
A novel high temperature resistance ionic liquid@SiO 2 (IL@SiO 2 ) nanocapsules were successfully prepared in order to meet the high temperature processing requirement. The average diameter and the loading capacity of as-obtained IL@SiO 2 nanocapsules were about 420 nm and 44.7 wt% respectively. The IL@SiO 2 nanocapsules showed excellent thermal stability with a 340 °C initial thermal degradation temperature. The frictional and wear properties of PA6 composites containing IL@SiO 2 nanocapsules under different friction temperature were studied systemically. Self-lubricating PA6 composites with 3 wt% IL@SiO 2 nanocapsules showed the optical tribological propertied. The corresponding friction coefficient of PA6 composites reduced by 38.9%, and the wear rate also showed a 60.7% decrease compared with pure PA6. Unlike most microcapsules, the addition of nanocapsuels did not cause an undesirable and obvious decrease in mechanical properties of PA6. Anti-wear and friction-reduction mechanism were depth analyzed, and results revealed that IL core and SiO 2 wall in nanocapsules synergistically contribute to improve self-lubricating performance of PA6 composites.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2023
·
IF 4.6
Jinfen Lou,Min He,Yufei Liu,Kai Zhang,Lulu He,Shuhao Qin,Jie Yu
The correlations between the antioxidant activity and hindered phenolic antioxidants bonded with para bridge structures in polyamide 6 (PA6) were studied by comparing the antioxidant properties of three hindered phenolic antioxidants bonded with different bridging groups. The antioxidant properties of the pure PA6 and stabilized PA6 were investigated in terms of mechanical properties , rheological properties, crystallization properties, chemical structure , and the migration resistance of antioxidants. The radical scavenging activity and capacity of hindered phenolic antioxidants were also compared. The results showed that the hindered phenolic bonded with the aromatic ring exhibits the best activity and capacity in scavenging radical and the best migration resistance in PA6. Therefore, the tensile strength of PA6/HPAP remains at 117 % of the unaged sample after 12 days of thermal oxygen aging at 150 °C, and the notch impact strength of PA6/HPAP remains at 68 % of the unaged sample. The mechanical properties of PA6/HPAP are comparable to PA6/1098 (a commonly used commercial antioxidant in PA) after 12 days of thermal oxygen aging. The mechanism of the hindered phenolic antioxidants bonded with para bridge structure in scavenging PA6 free radicals and inhibiting the aging of PA6 macromolecular chains was explored in this article.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·
IF 2.7
Bo He,Jianuo Ma,Luobing Xiang,Han Wang,Xi Wang,Chunwang Yi
As a representative of dope-dye, the color masterbatch method has been widely applied in modern dyeing processes, while it has difficulties in solving the dispersibility of inorganic pigments color master batch in the polymer matrix. In this work, attapulgite (ATP) was used as the adsorption carrier of inorganic pigments to prepare color-dyed attapulgite (CD-ATP). The selected environmentally friendly inorganic pigments were well adsorbed by ATP in KOH aqueous solution, and could stably be monodispersed in KOH aqueous solution for more than 168 h. Moreover, the KOH aqueous solution could be reused repeatedly, thereby, a sustainable method to prepare novel CD-ATP was realized. By blending the as-prepared CD-ATP with polyamide-6 (PA6), a series of dope-dyed colorful PA6 composites was prepared. Scanning electron microscope (SEM) results indicated that the CD-ATP was still monodispersed in the PA6 matrix, and endowed PA6 with a vivid color. Further studies show that the adding of CD-ATP had little influence on the properties of PA6, but significantly reduced the water adsorption. This novel color-dyed ATP has potential implications in making paper-making blankets and is highly expected to have more extensive applications in many fields of life.
研究领域:
材料科学
·
染色技术
✓ 已验证
DOI
高影响因子
SURFACE AND INTERFACE ANALYSIS
·
2025
·
IF 1.8
Li Jian,Lu Mingxu
Functionalized TiO 2 was prepared by a simple impregnation method, and a layer of functionalized modified TiO 2 coating was introduced on the surface of carbon fiber to improve the wettability and activity of the surface of carbon fiber. FTIR and XPS show that polyethylenepolyamine (PEPA) was grafted to the surface of nano TiO 2 successfully. PEPA-TiO 2 grafting can improve the wettability between carbon fiber and polyamide 6 (PA6), and the contact angle of PEPA-TiO 2 grafting carbon fiber is smaller than that of untreated carbon fiber, but the contact angle gradually increases with the increase of PEPA-TiO 2 grafting concentration.
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 VINYL & ADDITIVE TECHNOLOGY
·
2026
·
IF 4
Dengwang Lai,Cheng Cao,Wuyan Cao,Li Liu,Yuejun Liu,Jun Yang
Polyamide 6 (PA6) is inherently flammable and prone to severe melt-dripping, which severely restricts its application in aerospace, rail transit, and public safety sectors. To address this, we developed a complementary flame-retardant system by incorporating electrochemically exfoliated graphene (GR), melamine polyphosphate (MPP), and aluminum diethylphosphinate (ADP) into PA6 via in situ polymerization. The thermal stability and interactions among the three components were thoroughly investigated. The results indicate that the optimized formulations exhibit significant flame-retardant enhancement. Specifically, the GR/MPP/ADP/PA6-012 and GR/MPP/ADP/PA6-75 composites achieved limiting oxygen index (LOI) values of 35% and 29%, respectively, and both passed the vertical burning test and achieved V-0 rating, without any dripping. In cone calorimetry, the GR/MPP/ADP/PA6-57 composite demonstrated the most effective heat-release suppression, with the peak heat release rate (pHRR) and total heat release (THR) significantly reduced to 76.3 kW m −2 and 37.7 MJ m −2 , respectively. Mechanistic analysis reveals that GR forms a continuous, compact physical barrier during combustion, effectively hindering heat transfer. MPP promotes the formation of an expanded char layer, enhancing condensed-phase protection. Meanwhile, ADP releases PO · radicals in the gas phase to quench flame-active species and simultaneously promotes char formation. The three components work complementarily, establishing a multi-level “barrier–charring–quenching” flame-retardant network. This study proposes an efficient and environmentally friendly flame-retardant strategy for PA6. By optimizing the ratio of each flame retardant, the resulting composites exhibit superior flame-retardant performance, offering new insights into the flame-retardant modification of engineering plastics and the design of multi-component systems. Highlights GR/MPP/ADP flame-retardant system for PA6 was developed via electrochemistry and in situ polymerization. Electrochemically exfoliated GR forms a continuous two-dimensional physical barrier in PA6 with excellent dispersibility. The ternary system achieves an LOI of 35% and vertical burning test V-0 rating without any dripping. Optimized composite reduced pHRR by 85.3% and THR by 28.5% in cone calorimetry. Synergistic GR/MPP/ADP system builds a barrier–charring–quenching flame-retardant network.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Bozhen Wu,Xuejiao Song,Yongkang Meng,Yanghua Song,Zhongpu Shi,Yan Liu
Advances in electronic device miniaturization and system integration, alongside rapid progress in wireless communication technologies, have significantly amplified electromagnetic interference problems. This development necessitates the creation of high-performance electromagnetic shielding materials. This study presents a new design for electromagnetic shielding composites comprising an asymmetric structure of cobalt-coated nylon 6 microspheres (PA6@Co), silver nanowires (AgNWs) and poly(vinylidene fluoride) (PVDF). Specifically, PA6 microspheres were prepared using anionic reaction-induced phase separation, and cobalt was plated on their surfaces, thereby forming magnetic PA6@Co microspheres. The magnetic saturation intensity of these microspheres can reach 80 emu/g. The asymmetric PA6@Co/AgNWs/PVDF electromagnetic shielding composites with absorption-dominant characteristics were constructed using AgNWs as the conductive filler and PVDF as the matrix. The results show that within the X-band (8.2–12.4 GHz) range, the PA6@Co/AgNWs/PVDF composite material exhibits excellent electromagnetic shielding performance. Its maximum electromagnetic shielding efficiency (SET) reaches 48.1 dB, and the absorption coefficient (A) is 0.8, demonstrating a distinct absorption-dominant shielding characteristic. This asymmetric structural design strategy solves the limitations of traditional shielding materials and provides a new approach to developing environmentally friendly, efficient electromagnetic shielding materials.
研究领域:
材料科学
·
电磁功能材料
·
纳米复合材料
·
聚合物复合材料
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2025
·
IF 9.8
Yining Wang,Yuxi Pan,Mingguang Zhang,Yu Deng,Zhimin Wang,Xigao Jian,Yousi Chen
Grounded in the principle of “like dissolves like”, the development of water-soluble sizing agents characterized by matrix-like structures has emerged as a focal point of research within the interface domain. Nevertheless, the reliance exclusively on the entanglement forces between the sizing agent and the matrix is deemed inadequate. In this study, a novel water-soluble dual-component sizing agent tailored for the nylon 6 (PA6) resin matrix has been developed. By leveraging the self-emulsifying and water-soluble properties of sodium lignosulfonate (SL) and polyamic acid (PAA), these components are concurrently introduced onto the fiber surface. Following treatment, a distinct interfacial region is established on the fiber surface as a result of their interactions. Exploiting their intrinsic differences at processing temperatures facilitates differential wetting of the matrix resin on the fiber surface, consequently resulting in the formation of a “mechanical interlocking” structure between the fiber and the matrix. The findings reveal that the flexural strength and interlaminar shear strength of the modified CF/PA6 composites achieved values of 977.8 MPa and 74.1 MPa, corresponding to enhancements of 27.4 % and 28.8 %, respectively, when compared to their unmodified counterparts. This innovative sizing agent not only significantly enhances interfacial adhesion but also confers high added-value potential to lignin-derived materials, a factor that is essential for future sustainable development.
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
FIBERS AND POLYMERS
·
2025
·
IF 2.3
Tang Xiaoyan,Guo Xun,Qian Xiaoming,Duo Yongchao,Tang Yuanbing,Lan Yina,Fu Hiroshi
The compatibility of low-density polyethylene (LDPE) and polyamide 6 (PA6) during melt-blending spinning plays a crucial role in ensuring good spinnability, while the drawing and fiber-splitting processes are key to forming ultrafine fibers. This study systematically investigates the Flory–Huggins interaction parameters between LDPE and PA6, as well as the fiber-splitting and drawing behaviors of unfigured sea–island composite fibers, with a focus on compatibility and fabrication techniques. The results reveal that the Flory–Huggins interaction parameters for LDPE and PA6 at different blend ratios are 0.0517 ± 0.0014, significantly exceeding the critical interaction threshold of 0.0091, indicating complete incompatibility between the two polymers. Through an in-depth analysis of the drawing process, it was found that after the drawing ratio of 4, the fiber fineness reached 3.7 dtex, with a fiber orientation of 78%, a breaking strength of 5.56 cN/dtex, and a breaking elongation of 41%. During the fiber-splitting process of LDPE/PA6 sea–island composite fibers, the optimal conditions were determined to be a splitting temperature of 90 °C, a splitting time of 60 min, and a degradation rate of 43%. Under these conditions, the composite fiber diameter significantly decreased from 27.04 μm to 0.85 μm. These findings provide valuable insights into optimizing the manufacturing process and enhancing the performance of LDPE/PA6 composite fibers.
研究领域:
材料科学
·
高分子科学
·
纤维技术
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2025
·
IF 4.7
Kai Wang,Fangjuan Wu,Caofeng Ji,Hui Fang,Xinfeng Fan
In this study, high-performance thermally conductive polyamide 6 (PA6) composites synergistically filled with spherical aluminum oxide (Al 2 O 3 ) and one-dimensional carbon nanotubes (CNTs) were prepared via reactive blending and compared with those prepared by conventional melt blending. The experimental results showed that at Al 2 O 3 and CNT loadings of 48 and 2 wt%, respectively, the thermal conductivity of the composites reached 0.85 W m −1 K −1 , representing a 240% improvement over neat PA6 and superior performance compared to melt-blended samples with identical compositions. This performance enhancement was attributed to the ability of reactive blending to achieve uniform dispersion of Al 2 O 3 and good dispersion of CNTs even at high filler loadings, effectively suppressing filler agglomeration and defect formation while constructing more continuous thermal conduction networks. Parallel–series (P-S) model analysis verified the superior thermal network connectivity of reactively blended samples, and LED heat dissipation tests demonstrated that the material could reduce LED surface temperature by 18.6°C. The reactive blending approach significantly enhanced the tribological properties of PA6/Al 2 O 3 composites compared to the traditional melt blending method. The rbPA6/Al 2 O 3 /2CNT composite exhibited superior performance with a coefficient of friction of 0.35, representing a 58.8% reduction compared to the melt-blended mbPA6/Al 2 O 3 . Most impressively, the wear rate was reduced to 7 × 10 −5 mm 3 /(N m), a remarkable 70.4% reduction compared to the melt-blended mbPA6/Al 2 O 3 . The excellent thermal conductivity facilitated rapid dissipation of frictional heat, further enhancing the wear resistance of the material. This study provides an effective strategy for designing high-performance thermally conductive composites based on the synergistic effects of multiscale fillers. Highlights Reactive blending enables uniform dispersion at high filler loadings. Thermal conductivity increases by 240% compared to neat PA6. Friction coefficient is reduced by 58.8% with 2 wt% CNTs. P-S model validates enhanced thermal network connectivity. High thermal conductivity enhances wear resistance synergistically.
研究领域:
材料科学
·
聚合物复合材料
·
热管理
·
摩擦学
✓ 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）