Physical properties comparison of hydrogel from cassava starch using two different non toxic crosslinkers

Next Sustainability Pub Date : 2024-01-01 DOI:10.1016/j.nxsust.2024.100043

Fitri Nur Kayati , Chandra Wahyu Purnomo , Yuni Kusumastuti , Rochmadi

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Abstract

For the purpose of improving mechanical qualities, starch-based film hydrogel can be crosslinked. The choice of crosslinking agent is critical in adjusting hydrogel performance to fit the needs of specific applications. The present investigation examined the impact of two non-toxic crosslinking agents, namely citric acid and oxidized sucrose, on the mechanical and swelling properties of hydrogels. When compared to oxidized sucrose crosslinked hydrogels (OSH), citric acid crosslinked hydrogels (CAH) often offer a larger swelling; however, OSH without plasticizer is not included in this comparison. The OSH has the highest swelling value of 292% at pH 7, whereas the CAH has the highest swelling value of 116% at pH 7. Contrary to OSH film, which can only achieve 2.0 MPa, CAH film has a tensile strength of up to 3.75 MPa. Meanwhile, OSH film can achieve the greatest elongation of 54%.

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使用两种不同的无毒交联剂比较木薯淀粉水凝胶的物理性质

为了提高机械性能，可以对淀粉基薄膜水凝胶进行交联。交联剂的选择对于调整水凝胶的性能以适应特定应用的需要至关重要。本研究考察了两种无毒交联剂（即柠檬酸和氧化蔗糖）对水凝胶机械和膨胀性能的影响。与氧化蔗糖交联水凝胶（OSH）相比，柠檬酸交联水凝胶（CAH）通常具有更大的膨胀性；不过，不含增塑剂的OSH不在比较之列。OSH 在 pH 值为 7 时的溶胀值最高，达到 292%，而 CAH 在 pH 值为 7 时的溶胀值最高，达到 116%。与 OSH 薄膜只能达到 2.0 兆帕相反，CAH 薄膜的拉伸强度可达 3.75 兆帕。同时，OSH 薄膜的最大伸长率为 54%。

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