On the Thermal Stability and Structures of Layered Double Hydroxides Mg1-xAlx(OH)2(NO3)x·mH2O (0.18 ≤ x ≤ 0.38)

2015 ◽  
Vol 2015 (10) ◽  
pp. 1775-1788 ◽  
Author(s):  
Anja Olafsen Sjåstad ◽  
Niels Højmark Andersen ◽  
Ponniah Vajeeston ◽  
Jayakumar Karthikeyan ◽  
Bjørnar Arstad ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Layered Double Hydroxides ◽  
Double Hydroxides

Antioxidant intercalated Zn-containing layered double hydroxides: preparation, performance and migration properties

2017 ◽  
Vol 41 (6) ◽  
pp. 2364-2371 ◽  
Author(s):  
Qian Zhang ◽  
Qian Jiao ◽  
Fabrice Leroux ◽  
Pinggui Tang ◽  
Dianqing Li ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Layered Double Hydroxides ◽  
High Thermal Stability ◽  
Promising Candidate ◽  
Migration Ability ◽  
And Migration ◽  
Double Hydroxides

A Zn-containing LDH/PP composition has a high thermal stability and anti-migration ability, and is a highly promising candidate for possible applications.

Sb-intercalated layered double hydroxides-poly(vinyl chloride) nanocomposites: Preparation, characterization, and thermal stability

2015 ◽  
Vol 132 (39) ◽  
pp. n/a-n/a ◽  
Author(s):  
Shu-Ting Liu ◽  
Ping-Ping Zhang ◽  
Kang-Kang Yan ◽  
Yuan-Hu Zhang ◽  
Ying Ye ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Vinyl Chloride ◽  
Layered Double Hydroxides ◽  
Poly Vinyl Chloride ◽  
Double Hydroxides

scholarly journals Modification of nano-sized layered double hydroxides by long-chain organic aliphatic surfactants

2008 ◽  
Vol 73 (3) ◽  
pp. 321-331 ◽  
Author(s):  
Ramasamy Anbarasan ◽  
Wanduc Lee ◽  
Seung Soon
Keyword(s):  
Thermal Stability ◽  
Layered Double Hydroxides ◽  
Exchange Process ◽  
Xrd Analysis ◽  
Basal Spacing ◽  
Ion Exchange Process ◽  
Dodecanedioic Acid ◽  
Double Hydroxides ◽  
Thermal Stability Of ◽  
Long Chain

The inter-layer anion of layered double hydroxides (LDH) with a hydrotalcite (HT)-like structure was ion-exchanged with various organic surfactants, particularly with long chain aliphatic surfactants. After the ion-exchange process, the basal spacing of the LDH was increased and the increase of the basal spacing depended on various factors, such as the intercalation capacity functionality and orientation capability of the surfactant. Of the employed surfactants, stearic acid intercalated LDH showed the highest increase of the basal spacing, which was confirmed by XRD analysis. FTIR results supported the interaction of the surfactants with the LDH. In addition, an increase in the thermal stability of the dodecanedioic acid intercalated HT was evidenced by the TGA method.

scholarly journals Efficient Thermo-Stability and Smoke-Suppression Properties of La Doping Mg-Al LDHs on PVC Nanocomposites

2021 ◽  
Vol 57 (4) ◽  
pp. 297-308
Author(s):  
Jinjie Zhang ◽  
Bin Xu ◽  
Hengxu Wang ◽  
Fupeng Jin ◽  
Jinfeng Dai ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thermal Stability ◽  
Vinyl Chloride ◽  
Layered Double Hydroxides ◽  
Thermal Aging ◽  
Smoke Suppression ◽  
Molar Ratio ◽  
La Doping ◽  
Poly Vinyl Chloride ◽  
Double Hydroxides

Despite the advantages of the non-flammable, good performance and low price, poly (vinyl chloride) (PVC) still suffer from poor thermal stability, restricting its melting process and applications. Although addition of some heat stabilizers can be used to improve the low thermal stability, so far, they normally compromise the environmental issues and smoke density of PVC during combustion. In this work, a series of La doping Mg-Al layered double hydroxides (LaLDHs) with different molar ratio of La3+ / Al3+ were successfully synthesized by coprecipitation-hydrothermal method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectrum (FT-IR), Scanning Electron Microscopy (SEM) and Transmission electron microscopy (TEM). The results showed that the as-prepared LaLDHs exhibit plate-like morphology with a lateral size around 100-180 nm. The different as-prepared LaLDHs were introduced into PVC as heat stabilizer to prepare PVC nanocomposites. The thermal stability and smoke suppression of PVC nanocomposites were investigated by TGA, thermal aging, Congo red and smoke density rating test (SDR), respectively. All the results demonstrated that PVC-LaLDHs2 nanocomposites containing 2% LaLDHs2 (the molar ratio of La3+ / Al3+ is 1 / 3) were optimized, which achieved the maximal T50% value of 337.2 oC, minimal SDR value of 45.6%, and prolonged the thermal aging time from less than 10mins to 90mins, respectively thermal stability time from 1242s to 2751s. In addition, the tensile strength and elastic modulus of PVC-LaLDHs2 respectively increased by 84.4% (56.6 MPa) and 75.5% (1019.4 MPa) with little affecting elongation at break of PVC. LDHs (layered double hydroxides); rare earth ions; thermal stability; smoke suppression; poly (vinyl chloride)

Embedded High Density Metal Nanoparticles with Extraordinary Thermal Stability Derived from Guest−Host Mediated Layered Double Hydroxides

2010 ◽  
Vol 132 (42) ◽  
pp. 14739-14741 ◽  
Author(s):  
Meng-Qiang Zhao ◽  
Qiang Zhang ◽  
Wei Zhang ◽  
Jia-Qi Huang ◽  
Yinghao Zhang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Metal Nanoparticles ◽  
Layered Double Hydroxides ◽  
High Density ◽  
Double Hydroxides

Effects of MgAlCe-CO3 layered double hydroxides on the thermal stability of PVC resin

2010 ◽  
Vol 119 (5) ◽  
pp. 2620-2626 ◽  
Author(s):  
Shi Yi ◽  
Zhan-Hong Yang ◽  
Sheng-Wei Wang ◽  
Dong-Ren Liu ◽  
Su-Qin Wang ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Layered Double Hydroxides ◽  
Double Hydroxides ◽  
Thermal Stability Of
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