A self-assembled tannic acid-modified Zn-Al LDH supported Mg(OH)2 nanofiller for the preparation of bisphenol A based poly(amide-imide) nanocomposites

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED Journal of Vinyl & Additive Technology Pub Date : 2024-05-30 DOI:10.1002/vnl.22114

Mohsen Hajibeygi, Hesam Moradi

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Abstract

A multifunctional organic-inorganic nanofiller as a reinforcement of bisphenol A based poly(amide-imide) (BPAI) was assembled through the formation of electrostatic forces between tannic acid (TA)-modified Zn-Al LDH and Mg(OH)₂ nanoparticles (MDH). TA-modified MDH@Zn-Al LDH (TML) was fabricated using an in-situ, one-step co-precipitation method. This involved the growth of LDH layers in the TA/MDH suspension. The manner of surface modification and the placement of MDH along with LDH in the TML structure were confirmed using FTIR, XRD, FE-SEM, and TGA. The results exhibited that the modification has resulted in an intercalated structure with increased interlayer spacing of LDH. The Poly(amide-imide) nanocomposites were prepared by reinforcing BPAI with TML using the solution casting method. The best thermal stability of the nanocomposites, in both air and N₂ atmospheres, appeared in the sample with 2 wt% TML content. The T₁₀ and T_max values of this sample in the air atmosphere were found to be 45 and 37°C higher, respectively, than those of BPAI. Comparative to neat BPAI, the THR and HRC values of the mentioned sample were reduced by 43.6% and 45.7%, respectively. These results demonstrated the significant synergistic effect of the TML structure in enhancing the thermal and combustion resistance of BPAI.

Highlights

Preparation of LDH on a Mg(OH)₂/tannic acid as multifunctional nanofiller.
Self-assembling nanofiller including tannic acid-modified LDH-supported MDH.
A synthesized bisphenol A based poly(amide-imide) (BPAI).
Effect of the nanofiller on the thermal and combustion resistance of BPAI.

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用于制备双酚 A 基聚（酰胺-酰亚胺）纳米复合材料的自组装单宁酸修饰 Zn-Al LDH 支承 Mg(OH)2 纳米填料

通过单宁酸（TA）改性 Zn-Al LDH 与 Mg(OH)2 纳米粒子（MDH）之间形成的静电力，组装出一种多功能有机-无机纳米填料，作为双酚 A 基聚（酰胺-酰亚胺）（BPAI）的增强材料。TA 改性 MDH@Zn-Al LDH（TML）是采用原位一步共沉淀法制造的。这包括在 TA/MDH 悬浮液中生长 LDH 层。利用傅立叶变换红外光谱（FTIR）、X射线衍射（XRD）、FE-SEM和热重分析（TGA）确认了表面改性的方式以及MDH与LDH在TML结构中的位置。结果表明，改性产生了夹层结构，LDH 的层间距增大。采用溶液浇铸法用 TML 增强 BPAI 制备了聚酰胺酰亚胺纳米复合材料。在空气和 N2 大气中，TML 含量为 2 wt% 的样品的纳米复合材料热稳定性最好。该样品在空气中的 T10 和 Tmax 值分别比 BPAI 高 45°C 和 37°C。与纯 BPAI 相比，上述样品的 THR 值和 HRC 值分别降低了 43.6% 和 45.7%。这些结果表明 TML 结构在提高双酚 AI 的耐热性和耐燃烧性方面具有显著的协同效应。自组装纳米填料，包括单宁酸修饰的 LDH-supported MDH。一种合成的双酚 A 基聚（酰胺酰亚胺）（BPAI）。纳米填料对 BPAI 耐热性和耐燃烧性的影响。

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来源期刊

Journal of Vinyl & Additive Technology 工程技术-材料科学：纺织

CiteScore

5.40

自引率

14.80%

发文量

审稿时长

>12 weeks

期刊介绍： Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.