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Preparation of γ-Divinyl-3-Aminopropyltriethoxysilane Modified Lignin and Its Application in Flame Retardant Poly(lactic acid).
Materials (Basel). 2018 Aug 22; 11(9)M

Abstract

Lignin can be a candidate as a charring agent applied in halogen-free flame retardant polymers, and incorporation of silicon and nitrogen elements in lignin can benefit to enhancing its thermal stability and charring ability. In the present work, wheat straw alkali lignin (Lig) was modified to incorporate silicon and nitrogen elements by γ-divinyl-3-aminopropyltriethoxysilane, and the modified lignin (CLig) was combined with ammonium polyphosphate (APP) as intumescent flame retardant to be applied in poly(Lactic acid) (PLA). The flame retardancy, combustion behavior and thermal stability of PLA composites were studied by the limited oxygen index (LOI), vertical burning testing (UL-94), cone calorimetry testing (CCT) and thermogravimetric analysis (TGA), respectively. The results showed a significant synergistic effect between CLig and APP in flame retarded PLA (PLA/APP/CLig) occured, and the PLA/APP/CLig had better flame retardancy. CCT data analysis revealed that CLig and APP largely reduced the peak heat release rate (PHRR) and total heat release rate (THR) of PLA, indicating their effectiveness in decreasing the combustion of PLA. TGA results exhibited that APP and CLig improved the thermal stability of PLA at high temperature. The analysis of morphology and structure of residual char indicated that a continuous, compact and intumescent char layer on the material surface formed during firing, and had higher graphitization degree. Mechanical properties data showed that PLA/APP/CLig had higher tensile strength as well as elongation at break.

Authors+Show Affiliations

Faculty of Materials Science & Engineering, Changzhou University, Changzhou 213164, Jiangsu, China. ysong@cczu.edu.cn. Jiangsu Key Laboratory of Environmentally Friendly Polymer Materials, Changzhou University, Changzhou 213164, Jiangsu, China. ysong@cczu.edu.cn.Faculty of Materials Science & Engineering, Changzhou University, Changzhou 213164, Jiangsu, China. 15251930097@163.com.Faculty of Materials Science & Engineering, Changzhou University, Changzhou 213164, Jiangsu, China. wnan0824@163.com.Faculty of Forestry, University of Toronto, 33 Willcocks Street, Toronto, ON M5S 3B3, Canada. ning.yan@utoronto.ca.School of Environmental and Safety Engineering, Changzhou University, Changzhou 213164, Jiangsu, China. xyshan@cczu.edu.cn.Faculty of Materials Science & Engineering, Changzhou University, Changzhou 213164, Jiangsu, China. Lijinchun88@163.com. Jiangsu Key Laboratory of Environmentally Friendly Polymer Materials, Changzhou University, Changzhou 213164, Jiangsu, China. Lijinchun88@163.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30135388

Citation

Song, Yan, et al. "Preparation of γ-Divinyl-3-Aminopropyltriethoxysilane Modified Lignin and Its Application in Flame Retardant Poly(lactic Acid)." Materials (Basel, Switzerland), vol. 11, no. 9, 2018.
Song Y, Zong X, Wang N, et al. Preparation of γ-Divinyl-3-Aminopropyltriethoxysilane Modified Lignin and Its Application in Flame Retardant Poly(lactic acid). Materials (Basel, Switzerland). 2018;11(9).
Song, Y., Zong, X., Wang, N., Yan, N., Shan, X., & Li, J. (2018). Preparation of γ-Divinyl-3-Aminopropyltriethoxysilane Modified Lignin and Its Application in Flame Retardant Poly(lactic acid). Materials (Basel, Switzerland), 11(9). https://doi.org/10.3390/ma11091505
Song Y, et al. Preparation of γ-Divinyl-3-Aminopropyltriethoxysilane Modified Lignin and Its Application in Flame Retardant Poly(lactic Acid). Materials (Basel, Switzerland). 2018 Aug 22;11(9) PubMed PMID: 30135388.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Preparation of γ-Divinyl-3-Aminopropyltriethoxysilane Modified Lignin and Its Application in Flame Retardant Poly(lactic acid). AU - Song,Yan, AU - Zong,Xu, AU - Wang,Nan, AU - Yan,Ning, AU - Shan,Xueying, AU - Li,Jinchun, Y1 - 2018/08/22/ PY - 2018/07/15/received PY - 2018/08/11/revised PY - 2018/08/15/accepted PY - 2018/8/24/entrez PY - 2018/8/24/pubmed PY - 2018/8/24/medline KW - combustion behavior KW - poly(lactic acid) KW - silicon and nitrogen elements KW - thermal stability KW - wheat straw soda lignin JF - Materials (Basel, Switzerland) VL - 11 IS - 9 N2 - Lignin can be a candidate as a charring agent applied in halogen-free flame retardant polymers, and incorporation of silicon and nitrogen elements in lignin can benefit to enhancing its thermal stability and charring ability. In the present work, wheat straw alkali lignin (Lig) was modified to incorporate silicon and nitrogen elements by γ-divinyl-3-aminopropyltriethoxysilane, and the modified lignin (CLig) was combined with ammonium polyphosphate (APP) as intumescent flame retardant to be applied in poly(Lactic acid) (PLA). The flame retardancy, combustion behavior and thermal stability of PLA composites were studied by the limited oxygen index (LOI), vertical burning testing (UL-94), cone calorimetry testing (CCT) and thermogravimetric analysis (TGA), respectively. The results showed a significant synergistic effect between CLig and APP in flame retarded PLA (PLA/APP/CLig) occured, and the PLA/APP/CLig had better flame retardancy. CCT data analysis revealed that CLig and APP largely reduced the peak heat release rate (PHRR) and total heat release rate (THR) of PLA, indicating their effectiveness in decreasing the combustion of PLA. TGA results exhibited that APP and CLig improved the thermal stability of PLA at high temperature. The analysis of morphology and structure of residual char indicated that a continuous, compact and intumescent char layer on the material surface formed during firing, and had higher graphitization degree. Mechanical properties data showed that PLA/APP/CLig had higher tensile strength as well as elongation at break. SN - 1996-1944 UR - https://www.unboundmedicine.com/medline/citation/30135388/Preparation_of_γ_Divinyl_3_Aminopropyltriethoxysilane_Modified_Lignin_and_Its_Application_in_Flame_Retardant_Poly_lactic_acid__ L2 - https://www.mdpi.com/resolver?pii=ma11091505 DB - PRIME DP - Unbound Medicine ER -
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