Intercalation of modified zanthoxylum bungeanum maxin seed oil/ stearate in layered double hydroxide: Toward flame retardant nanocomposites

• Published in: Journal of environmental management 2019-05, Vol.238, p.235-242
• Main Authors: Lyu, Bin, Wang, Yue-Feng, Gao, Dang-ge, Ma, Jian-zhong, Li, Yun
• Format: Article
• Language: English
• Subjects: Flame retardant; Layered double hydroxide; Thermal stability; Zanthoxylum bungeanum maxin seed oil
• ISSN: 0301-4797; 1095-8630
• DOI: 10.1016/j.jenvman.2019.03.001

Zanthoxylum bungeanum Maxim Seed Oil (ZBMSO) is widely distributed in most parts of China, which cannot be edible and extensively consumed due to its high free fatty acids. This paper reports a rational route to utilization of ZBMSO in preparation of nanocomposites which can enhance leather flame retardancy and thermal stability. ZBMSO was synthesized through three-stage process, decoloration, acid reduction and sulfitation to prepare the modified ZBMSO fatliquoring agent (MZBMSO). Then nanocomposites based on MZBMSO and stearate-layered double hydroxide (s-LDH) were prepared via in-situ method. XRD and TEM results indicated that the MZBMSO intercalate into the galleries of s-LDH with uniform dispersion. Compared with MZBMSO, the leather treated by MZBMSO/s-LDH had a remarkable improvement on flame retardancy and superior softness which limiting oxygen index (LOI) increased from 23.6% to 28.0% and smoke density index decreased from 25 to 6. [Display omitted] •A rational route to use of Zanthoxylum bungeanum maxin seed oil was developed.•We synthesized a halogen-free nanocomposite flame retardant fatliquoring agent.•The flame retardancy of leather was improved by layered double hydroxides.•The flame retardation mechanism of fatliquoring agent was investigated.