pH-triggered MgAlZr layered double hydroxides for modification of collagen fibers with enhanced thermal stability and UV resistance

Chen, Hou; Ma, Jianzhong; Shi, Jiabo; Gao, Dangge

doi:10.1016/j.clay.2020.105827

Cited by 27 publications

(14 citation statements)

References 54 publications

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“…It should be noted that the small nanoplatelets cannot be clearly observed in the FESEM images under a finite magnification, and the observed LAP aggregates are a little larger than those inside the fiber strands. This is reasonable because they can be bound onto the surface of the fiber strands, which can be influenced by the pH value of the binding process and the presence of salts. , This is similar to the morphological change of layered double hydroxide nanoplatelets within the collagen in our recent work . Obviously, the incorporation of LAP–THPS NPs within the CF matrix is different from that of the unfunctionalized ones, which can reach the surface sites of the collagen strands .…”

Section: Resultssupporting

confidence: 76%

“…23,24 This is similar to the morphological change of layered double hydroxide nanoplatelets within the collagen in our recent work. 52 Obviously, the incorporation of LAP−THPS NPs within the CF matrix is different from that of the unfunctionalized ones, which can reach the surface sites of the collagen strands. 24 Surface functionalization of LAP NPs with THPS can enhance the incorporation of the NPs within the collagens, which probably resulted from the covalent reactions between the collagens and the functionalized NPs.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Hierarchical Incorporation of Surface-Functionalized Laponite Clay Nanoplatelets with Type I Collagen Matrix

et al. 2020

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Unraveling the interaction mechanisms of type I collagen with various inorganic nanoparticles is of pivotal importance to construct collagen-based bionanocomposites with hierarchical structures for biomedical, pharmaceutical, and other industrial applications. In this study, synthetic two-dimensional Laponite nanoplatelets (LAP NPs) are surface-functionalized with tetrakis(hydroxymethyl) phosphonium sulfate (THPS) for reinforcing their incorporation with type I collagen matrix by focusing on the influences of the interactions on the hierarchical structures of the collagen. Our results indicate that the LAP NPs can be successfully surface-functionalized with THPS via covalent bonds between the amine-functionalized NPs and the hydroxymethyl groups of THPS. Moreover, the resulting NPs can be well dispersed into the collagen matrix and evenly bound onto the collagen fiber strands and between the collagen fibrils, preserving the native D-periodic banding patterns of the collagen fibrils. The formation of covalent and hydrogen bonds between the collagen and the functionalized NPs can stabilize the intrinsic triple-helical conformation of the collagen, conferring the resulting collagen-based nanocomposites with improved thermal stability and enhanced mechanical properties. We anticipate that a fundamental understanding of the interactions between the collagen and functionalized inorganic nanoparticles would contribute to the design, fabrication, and further application of hierarchical collagen-based bionanocomposites with multifunctions.

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Section: Resultssupporting

confidence: 76%

Section: ■ Results and Discussionmentioning

confidence: 99%

Hierarchical Incorporation of Surface-Functionalized Laponite Clay Nanoplatelets with Type I Collagen Matrix

et al. 2020

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“…Shi et al 17,18 reported that laponite with negative charge can be absorbed on the positive charged groups on collagen fibrils in leather matrix after tanning process via ionic bonding. On the other hand, it was reported that lamellar nanosheet materials with metallic element can coordinate with carboxyl and amino groups on collagen 25 . In this case, we applied XPS spectra to evaluate the interaction between collagen and laponite.…”

Section: Resultsmentioning

confidence: 99%

“…On the other hand, it was reported that lamellar nanosheet materials with metallic element can coordinate with carboxyl and amino groups on collagen. 25 In this case, we applied XPS spectra to evaluate the interaction between collagen and laponite. All XPS spectra had been corrected via the carbon contamination at 284.8 eV.…”

Section: Xps Spectra Analysismentioning

confidence: 99%

Infiltration of laponite: An effective approach to improve the mechanical properties and thermostability of collagen hydrogel

Tian

Yang

et al. 2022

J of Applied Polymer Sci

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Rapid aggregate precipitation of collagen and laponite in solution restricted the development of corresponding hybrid materials. Herein, a facile method of immerging collagen hydrogel into laponite dispersion was adopted to prepare hybrid collagen/laponite hydrogel, avoiding the precipitation. Collagen hydrogel shrunk and water content decreased dramatically after laponite solution treatment. According to the images of Scanning electron microscopy and energy dispersive system, the uniformly dispersed laponite in collagen hydrogel was observed, demonstrating infiltration of laponite into collagen hydrogel. X-ray photoelectron spectroscopy results revealed that coordination bonds generated between magnesium in laponite and collagen. Thermogravimetric analysis and Differential scanning calorimetry results displayed thermal decomposition temperature of collagen hydrogel increased from 321 to 342 C, and denaturation temperature rose from 43.8 to 50.8 C after laponite infiltration. Rheological and compressive tests showed the elastic modulus, fracture stress, compressive modulus and rupture point of hydrogel treated by 10% laponite were 695.2 Pa, 253.3 kPa, 13.5 kPa and 76.7%, respectively, which were about 3.5, 5.5, 45.0, and 1.4 times larger than those of pristine collagen hydrogel. Besides, enzyme degraded rate of collagen was decelerated, and the hydrogel was still nontoxic with the infiltration of laponite. The promising data demonstrated infiltration of laponite was an effective way to fabricate collagen/laponite hybrid materials with desirable properties.

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“…This demonstrates possible coordination interactions between Zn 2+ and COOH of the MOF. [ 31 ] The results in Figure 3e show that the O 1s spectra of Zr‐MOF and ZnZr‐MOF‐LDH can be fitted to two peaks centered at 529.88 and 531.18 eV, which are related to OH and OZr, respectively. Moreover, a new peak appears at 532.28 eV in the O 1s spectra of ZnZr‐MOF‐LDH, which could be attributed to the bond of OZn.…”

Section: Resultsmentioning

confidence: 99%

A new type of multistage structure hydrotalcite material: To promote the absorption of chemicals in wet leather processing

Zhao

Gao

Lyu

et al. 2022

Applied Organom Chemis

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A novel ZnZr‐MOF‐LDH was designed and synthesized with Zr‐MOF as template, and subsequently, it was applied to leather tanning. Zr‐MOF and ZnZr‐MOF‐LDH were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT‐IR), X‐ray photoelectron spectroscopy (XPS), and nitrogen adsorption instrument. The results of SEM and TEM shown that when the mass ratio of Zr‐MOF to zinc nitrate was 1:2, the size of ZnZr‐MOF‐LDH was about 100 nm with surface has obvious convex polyhedral multilevel structure. The FT‐IR and XPS results showed that the ZnZr‐MOF‐LDH with good crystal structure was prepared. The Brunauer–Emmett–Teller (BET) results showed that the specific surface area and pore volume of ZnZr‐MOF‐LDH were higher than those of ZnZr‐LDH. The application results shown that compared with 2% chrome tanning agent tanning, the shrinkage temperature of leather treated by ZnZr‐MOF‐LDH combined with 2% chrome tanning agent tanning was increased from 73.1°C to 92.1°C and the thickening rate was increased from 38.71% to 56.98%. The subsequent wet processing was carried out which showed that adding ZnZr‐MOF‐LDH considered to be a good way to enhance the absorption rate of dyestuff and fatliquor, resulting in an ecological process and more economical. The absorption of chemicals during wet processing of leather improves the properties of green leather and reduces environmental pollution.

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pH-triggered MgAlZr layered double hydroxides for modification of collagen fibers with enhanced thermal stability and UV resistance

Cited by 27 publications

References 54 publications

Hierarchical Incorporation of Surface-Functionalized Laponite Clay Nanoplatelets with Type I Collagen Matrix

Hierarchical Incorporation of Surface-Functionalized Laponite Clay Nanoplatelets with Type I Collagen Matrix

Infiltration of laponite: An effective approach to improve the mechanical properties and thermostability of collagen hydrogel

A new type of multistage structure hydrotalcite material: To promote the absorption of chemicals in wet leather processing

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