Preparation and Tensile Properties of Citric Acid Crosslinked Poly(vinyl alcohol) films reinforced with Nano-Alumina

IF 3.8 4区工程技术 Q2 CHEMISTRY, APPLIED Journal of Vinyl & Additive Technology Pub Date : 2023-09-08 DOI:10.1002/vnl.22049

Ankjeet Sinha, A. V. Ullas

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Abstract

Poly(vinyl alcohol) is widely used in many industrial applications due to its attractive physico-chemical properties. However, water solubility and limited mechanical strength may sometimes restrict its usage. In the present study, an attempt has been made to improve the mechanical properties of the poly(vinyl alcohol) films, particularly the tensile strength, the percentage elongation and Young's modulus. Poly(vinyl alcohol) films were prepared by solution casting. Citric acid is used as a crosslinker and nano-alumina (0.1–1% w/w) has been added as reinforcement in the crosslinked matrix. Compared to uncrosslinked films, the films containing citric acid demonstrate an increase of ~10% and ~38% in the tensile strength and modulus, respectively. Nano-alumina acted as a suitable reinforcement and enhanced the tensile strength and modulus of crosslinked film by ~20% and ~27%, respectively, at 0.3% (w/w) loading. Uncrosslinked film dissolved in distilled water whereas the crosslinked films underwent swelling which reduced with the addition of nano-alumina. Crosslinked poly(vinyl alcohol) films reinforced with nano-alumina thus possess superior properties compared to both uncrosslinked and crosslinked films. The crosslinked nanocomposite films could find immense use as a food packaging material or in making membranes for water desalination.

Highlights

Poly(vinyl alcohol) chemically crosslinked by citric acid.
Nano-alumina added as reinforcement in crosslinked poly(vinyl alcohol) film.
Swelling studies conducted on crosslinked nanocomposite films.
Tensile testing results showing the supremacy of crosslinked nanocomposite films over uncrosslinked and crosslinked pure film.

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纳米氧化铝增强柠檬酸交联聚乙烯醇薄膜的制备及其拉伸性能

聚乙烯醇由于其诱人的物理化学性质，在许多工业应用中得到了广泛应用。然而，水溶性和有限的机械强度有时可能限制其使用。在本研究中，试图改善聚乙烯醇薄膜的力学性能，特别是拉伸强度、伸长率和杨氏模量。采用溶液浇铸法制备了聚乙烯醇薄膜。柠檬酸用作交联剂，并在交联基质中添加纳米氧化铝（0.1–1%w/w）作为增强剂。与未交联的薄膜相比，含有柠檬酸的薄膜的拉伸强度和模量分别提高了约10%和约38%。纳米氧化铝作为合适的增强剂，在0.3%（w/w）的负载下，交联膜的拉伸强度和模量分别提高了约20%和约27%。未交联的薄膜溶解在蒸馏水中，而交联的薄膜发生溶胀，溶胀随着纳米氧化铝的加入而减少。因此，与未交联和交联的薄膜相比，用纳米氧化铝增强的交联聚乙烯醇薄膜具有优异的性能。交联的纳米复合薄膜可以作为食品包装材料或用于制造海水淡化膜。用柠檬酸化学交联的聚乙烯醇。在交联聚乙烯醇薄膜中添加纳米氧化铝作为增强材料。对交联纳米复合薄膜进行的溶胀研究。拉伸测试结果表明，交联的纳米复合薄膜优于未交联和交联的纯薄膜。

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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.