Films Based on Mater-Bi(R) Compatibilized with Pine?Resin?Derivatives: Optical, Barrier, and Disintegration Properties

编号 020030004

推送时间 20210719

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Films Based on Mater-Bi(R) Compatibilized with Pine?Resin?Derivatives: Optical, Barrier, and Disintegration Properties

来源期刊 Polymers

期 第300期

发表时间 20210507

关键词 thermoplastic starch;  pine?resin;  colophony;  gum?rosin;  pentaerythritol esters of gum?rosin;  compostable;  biodegradable; 

摘要 Mater-Bi(R) NF866 (MB) was blended with gum?rosin?and two pentaerythritol esters of gum?rosin?(labeled as LF and UT), as additives, to produce biobased and compostable films for food packaging or agricultural mulch films. The films were prepared by blending MB with 5, 10, and 15 wt.% of each additive. The obtained films were characterized by optical, colorimetric, wettability, and oxygen barrier properties. Moreover, the additives and the MB-based films were disintegrated under composting conditions and the effect of each additive on the biodegradation rate was studied. All films were homogeneous and optically transparent. The color of the films tended to yellow tones due to the addition of pine?resin?derivatives. All the formulated films presented a complete UV-transmittance blocking effect in the UVA and UVB region, and those with 5 wt.% of pine?resin?derivatives increased the MB hydrophobicity. Low amounts of?resins?tend to maintain the oxygen transmission rate (OTR) values of the neat MB, due to its good solubilizing and compatibilizing effects. The disintegration under composting conditions test revealed that gum?rosin?completely disintegrates in about 90 days, while UT degrades 80% and LF degrades 5%, over 180 days of incubation. As expected, the same tendency was obtained for the disintegration of the studied films, although Mater-Bi(R) reach 28% of disintegrability over the 180 days of the composting test.

服务人员 尚玮姣

服务院士 宋湛谦

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