Design Strategy for Vulcanization Accelerator of Diphenylguanidine/Cyclodextrin Inclusion Complex for Natural Rubber Latex Foam with Enhancing Performance
Wang Zhang,
Liwei Lin,
Junqiang Guo,
Ming Wu,
Sumin Park,
Hang Yao,
Sun Ha Paek,
Guowang Diao,
Yuanzhe Piao
Affiliations
Wang Zhang
Department of Applied Bioengineering, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea; School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
Liwei Lin
Department of Applied Bioengineering, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea
Junqiang Guo
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
Ming Wu
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
Sumin Park
Department of Applied Bioengineering, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea
Hang Yao
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
Sun Ha Paek
Department of Neurosurgery, Movement Disorder Center, Seoul National University Hospital, Hypoxia/Ischemia Disease Institute, Cancer Research Institute, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
Guowang Diao
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China
Yuanzhe Piao
Department of Applied Bioengineering, Graduate School of Convergence Science and Technology, Seoul National University, Seoul 08826, Republic of Korea; Advanced Institutes of Convergence Technology, 145 Gwanggyo-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16229, Republic of Korea
Vulcanization is an essential process to obtain high-performance rubber products. Diphenylguanidine (DPG) is often used as the secondary accelerator in the vulcanization process of natural rubber (NR) latex. However, DPG would make NR latex emulsion exhibit gelation, resulting in the negative vulcanization efficiency. In addition, exposure to DPG might lead to some physiological diseases during the production process of DPG doped NR latex. Hydroxypropyl-β-cyclodextrin (HP-β-CD) with the hydrophobic interior and hydrophilic exterior has the advantages of good water solubility, high bioavailability, reliable stability, and low toxicity. In this study, the inclusion complex of diphenylguanidine-hydroxypropyl-β-cyclodextrin (DPG-HP-β-CD) is prepared by ball milling with a host-guest molar ratio of 1 : 1, which has also been applied to the foaming process of NR latex. The mechanical properties of DPG-HP-β-CD inclusion complex/natural rubber latex foam (DPG-HP-β-CD/NRLF) have been significantly improved, including the tensile strength, elongation at break, hardness, compression set, resilience, and antiaging performance. Further, the usage of DPG has been reduced, leading to the reduction of toxicity and environmental hazards.
