Corn starch reactive blending with latex from natural rubber using Na+ ions augmented carboxymethyl cellulose as a crosslinking agent

Noppol Leksawasdi; Thanongsak Chaiyaso; Pornchai Rachtanapun; Sarinthip Thanakkasaranee; Pensak Jantrawut; Warintorn Ruksiriwanich; Phisit Seesuriyachan; Yuthana Phimolsiripol; Charin Techapun; Sarana Rose Sommano; Toshiaki Ougizawa; Kittisak Jantanasakulwong

doi:10.1038/s41598-021-98807-x

Corn starch reactive blending with latex from natural rubber using Na⁺ ions augmented carboxymethyl cellulose as a crosslinking agent

Sci Rep. 2021 Sep 28;11(1):19250. doi: 10.1038/s41598-021-98807-x.

Authors

Noppol Leksawasdi^{1

2

3}, Thanongsak Chaiyaso^{1

2}, Pornchai Rachtanapun^{1

2

3}, Sarinthip Thanakkasaranee^{1

2}, Pensak Jantrawut⁴, Warintorn Ruksiriwanich⁴, Phisit Seesuriyachan^{1

2

3}, Yuthana Phimolsiripol^{1

2

3}, Charin Techapun¹, Sarana Rose Sommano^{2

5}, Toshiaki Ougizawa⁶, Kittisak Jantanasakulwong^{7

8

9}

Affiliations

¹ School of Agro-Industry, Faculty of Agro-Industry, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand.
² Cluster of Agro Bio-Circular-Green Industry, Faculty of Agro-Industry, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand.
³ Center of Excellence in Materials Science and Technology, Faculty of Science, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand.
⁴ Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand.
⁵ Plant Bioactive Compound Laboratory (BAC), Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand.
⁶ Department of Chemistry and Materials Science, Tokyo Institute of Technology, Meguro-ku, Tokyo, Japan.
⁷ School of Agro-Industry, Faculty of Agro-Industry, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand. kittisak.jan@cmu.ac.th.
⁸ Cluster of Agro Bio-Circular-Green Industry, Faculty of Agro-Industry, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand. kittisak.jan@cmu.ac.th.
⁹ Center of Excellence in Materials Science and Technology, Faculty of Science, Chiang Mai University, Mae Hia, Muang, Chiang Mai, Thailand. kittisak.jan@cmu.ac.th.

Abstract

A mixture of corn starch and glycerol plasticizer (CSG) was blended with latex natural rubber (LNR) and carboxymethyl cellulose (CMC). The addition of 10 phr of CMC improved the Young's modulus (6.7 MPa), tensile strength (8 MPa), and elongation at break (80%) of the CSG/LNR blend. The morphology of the CSG/LNR/CMC blends showed a uniform distribution of LNR particles (1-3 µm) in the CSG matrix. The addition of CMC enhanced the swelling ability and water droplet contact angle of the blends owing to the swelling properties, interfacial crosslinking, and amphiphilic structure of CMC. Fourier transform infrared spectroscopy confirmed the reaction between the C=C bond of LNR and the carboxyl groups (-COO^-) of CMC, in which the Na⁺ ions in CMC acted as a catalyst. Notably, the mechanical properties of the CSG/LNR/CMC blend were improved owing to the miscibility of CSG/CMC and the CMC/LNR interfacial reaction. The CSG/LNR/CMC biodegradable polymer with high mechanical properties and interfacial tension can be used for packaging, agriculture, and medical applications.

Publication types

Research Support, Non-U.S. Gov't