Article
Chemistry, Physical
Sai Zou, Li Dang, Yawei Li, Shengjie Lan, Donghai Zhu, Le Li
Summary: A novel hybrid of double-modified magnesium borate whisker was synthesized to enhance the fire safety and mechanical characteristics of epoxy resin (EP). The incorporation of MBW@MH-DDP substantially lowered the fire properties and improved the mechanical properties of EP.
APPLIED SURFACE SCIENCE
(2022)
Article
Polymer Science
Pengwei Wu, Jie Liu, Song Wang, Sanxi Li, Tao Tang
Summary: Organically modified montmorillonite (OMMT) and Ni2O3 were incorporated into flame-retardant LEM composites, resulting in improved thermal stability and reduced heat release and smoke production. The addition of 5 wt% of OMMT/Ni2O3 had minimal impact on the tensile properties of LEM, while slightly increasing the limiting oxygen index (LOI) value. The combination of OMMT/Ni2O3 promoted the carbonization of the polymer into carbon nanotubes, forming a cohesive char layer with magnesium hydroxide and synergistically reducing heat release and smoke production.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Polymer Science
Ling-Li Jiao, Peng-Cheng Zhao, Zhi-Qi Liu, Qing-Shan Wu, Dong-Qiang Yan, Yi-Lan Li, Yu-Nan Chen, Ji-Sheng Li
Summary: In this study, hydromagnesite was used to synthesize magnesium hydroxide as a flame retardant for EVA. The introduction of magnesium hydroxide significantly improved the flame retardant properties and smoke suppression of the composites. The incorporation of different concentrations of sodium hydroxide had limited effect on the mechanical properties of the composites.
Article
Polymer Science
Raissa Carvalho Martins, Simone Pereira da Silva Ribeiro, Michelle Jakeline Cunha Rezende, Regina Sandra Veiga Nascimento, Marco Antonio Chaer Nascimento, Marcos Batistella, Jose-Marie Lopez-Cuesta
Summary: The study evaluated the fire-retardant properties of composites made from bio-based poly(lactic acid) (PLA) using injection and fused filament fabrication (FFF). The results showed that composites containing clays with only weak and moderate strength acidic sites (ANa and AH5) had the best flame behavior and fire-retardant properties.
Article
Chemistry, Physical
Dongdong Zhang, Ji Tan, Huihui Du, Shi Qian, Xuanyong Liu
Summary: The study revealed that the ferric hydroxide coating on magnesium alloy exhibited the best corrosion resistance and surpassed other coatings in terms of biocompatibility. This suggests that the ferric hydroxide coating could serve as a novel potential coating for modification of magnesium-based implants.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Chitiphon Chuaicham, Yihuang Xiong, Karthikeyan Sekar, Weinan Chen, Li Zhang, Bunsho Ohtani, Ismaila Dabo, Keiko Sasaki
Summary: In this study, Zn-Ti layered double hydroxide/montmorillonite and Fe-doped ZTL/MT photocatalysts were prepared for Cr(VI) reduction, with ZTL/Fe@MT20% showing the highest photocatalytic activity. Electronic-structure calculations and density functional theory approach revealed the effect of Fe impurities on the structure of MT and the photocatalytic mechanism for Cr(VI) reduction in ZTL/MT composites.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Ping Li, Li Dang, Yawei Li, Shengjie Lan, Donghai Zhu
Summary: In this study, a composite particle with layered double hydroxide (LDH) was deposited onto the surface of Mg2B2O5 whisker (MBW) using a co-precipitation method. Dodecyl dihydrogen phosphate (DDP) was then grafted onto the LDH-coated MBW to synthesize an inorganic-organic hybrid (MBW@LDH-DDP). The MBW@LDH-DDP was incorporated into epoxy resin (EP) to fabricate a composite, and it exhibited excellent curing behavior, fire properties, and mechanical properties. The results suggest that the incorporation of MBW@LDH-DDP can improve the fire safety and mechanical properties of EP, providing a novel strategy for designing multifunctional flame retardants.
MATERIALS & DESIGN
(2022)
Article
Polymer Science
Ping Li, Lijuan Li, Lianmin Ji, Li Dang, Shengjie Lan, Donghai Zhu
Summary: A composite material (MH@ZBO) was obtained by using a heterogeneous deposition method to improve the fire safety of epoxy resins (EP), and then an organic-inorganic hybrid (MH@ZBO-APES) was produced by grafting 3-aminopropyltriethoxysilane (APES) onto the surface of MH@ZBO. The EP composite with MH@ZBO-APES displayed improved thermal properties and fire safety due to the endothermic decomposition and physical barrier of MH and ZBO, as well as the flame retardation and dispersion improvement of APES.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jiabing Feng, Yixia Lu, Hongyan Xie, Yan Zhang, Siqi Huo, Xiaohuan Liu, Matt Flynn, Zhiguang Xu, Paulomi Burey, Mark Lynch, Hao Wang, Pingan Song
Summary: A novel phosphorus/nitrogen-based flame retardant (APN) was synthesized using a mild Michael addition polymerization without byproducts. With only 3 wt% of APN, the resulting PLA exhibited excellent fire retardancy, including a UL-94 V-0 rating and a limiting oxygen index of 37.6%. The fire-retardant PLA also showed an 85% increase in toughness compared to pure PLA, while maintaining tensile strength and thermal stability. This study provides an atom-economic strategy for synthesizing highly efficient P/N flame retardants for the creation of fire-resistant PLA with robust mechanical properties.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Construction & Building Technology
Yan Guan, Jun Chang, Zhiqi Hu, Wanli Bi
Summary: This paper investigates the influence of alkali concentration on the nanostructure of synthetic magnesium hydroxide and examines its effect on the performance of magnesium oxysulfate cement. The results show that increasing pH reduces the content of magnesium hydroxide gel but increases the content of MgO-MgSO4-H2O gel. A higher specific surface area of the magnesium hydroxide gel leads to lower thermal stability. The proper amounts of magnesium hydroxide gel and MgO-MgSO4-H2O gel benefit the mechanical properties of the cement. Higher alkali concentration also affects lattice distortion and thermal stability.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Environmental Sciences
Hongtao Li, Wei Zeng, Jianping Shi, Na Wen, Zhiwang Yang, Ziqiang Lei
Summary: In this study, inorganic magnesium hydroxide was modified by three phosphoric acids to obtain novel functionalized monomers which were introduced into the PET main chain to prepare high-performance co-polyesters. The thermal stability and flame retardant properties of the resulting P-n-MH-PETs were greatly improved, with 5%P-1-MH-PET showing the best performance. Interestingly, mechanical properties of 5%P-3-MH-PET were also enhanced.
Article
Polymer Science
Xi Feng, Zhengyu Wang, Hongli Ma, Bo Dang, Jianxi Li
Summary: In this study, MHPA was added to HDPE to prepare flame-retardant HDPE composites, aiming to reduce smoke and toxic gases produced during combustion. The results showed that the addition of MHPA and MH improved the flame retardancy and smoke suppression of HDPE. The LOI of HDPE/MHPA/MH increased, and the pHRR, THR, and TSP values decreased compared to pure HDPE. Moreover, the HDPE/MHPA/MH composites exhibited significant mechanical properties due to the interface compatibility of bio-based MHPA.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Jianwei Dai, Qiangsheng Dong, Yujin Nie, Yongqiang Jia, Chenglin Chu, Xiaobo Zhang
Summary: The microstructures, mechanical properties, and corrosion behaviors of Mg-4Gd-xY-1Zn-0.5Ca-1Zr (x = 1, 3, and 5 wt.%) alloys under as-cast condition were investigated. It was found that Y addition significantly improved the yield strength and corrosion resistance of the alloys.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Xiujuan Li, Ruisong Guo, Xiaodong Qian
Summary: In this study, a new fire extinguishing agent containing nano magnesium hydroxide particles and water-soluble flame retardant was prepared, showing good performance in absorbing CO and reducing flue gas temperature. This new agent can effectively reduce the harm to trapped personnel and firefighters in the fire site, providing them with more time to escape and reducing the threat of CO concentration and high flue gas temperature.
FRONTIERS IN MATERIALS
(2021)
Article
Polymer Science
Beibei Sun, Li Dang, Qiuyan Bi, Rujie Li, Qiuhui Gong, Zhihao Wan, Shiai Xu
Summary: In this study, maleic anhydride-modified polymers were used as bulking agents to improve the processing and mechanical properties of highly filled composites. The addition of the compatibilizer significantly enhanced the mechanical properties of the composites, but had a negative impact on their flame retardancy.
Article
Polymer Science
Zhongming Yuan, Hiroko Yamamoto, Shinji Kanehashi, Takeshi Shimomura
Summary: This study reports the synthesis of a flexible light-emitting polymer film using a solution blending method. The selective positioning of MEH-PPV molecules in the PS phase of the film was confirmed. The film exhibited a nanometer-scale luminescent domain with low aggregation quenching and showed good elastomeric characteristics.
POLYMERS FOR ADVANCED TECHNOLOGIES
(2024)
