Two-Step 3D-Printing Approach toward Sustainable, Repairable, Fluorescent Shape-Memory Thermosets Derived from Cellulose and Rosin

编号 020023904

推送时间 20200518

研究领域 林产化工 

年份 2020 

类型 期刊 

语种 英语

标题 Two-Step 3D-Printing Approach toward Sustainable, Repairable, Fluorescent Shape-Memory Thermosets Derived from Cellulose and Rosin

来源期刊 ChemSusChem

期 第239期

发表时间 20200309

关键词 3D printing;  cellulose;  fluorescent;  shape memory;  thermosets; 

摘要 Efficiently converting biomass into multifunctional polymerized materials is a challenge to effect high‐valued utilization of biomass resources. A two‐step 3?D‐printing approach has been developed to fabricate a class of robust, fluorescent shape‐memory thermosets from cellulose and rosin‐based photosensitive 3?D‐printing resin solution. The stereolithography 3?D printing was first performed to form the first crosslinked network by UV‐induced chain‐growth polymerization, which fixed the shape of thermoset. Subsequently, isocyanate was applied to react with hydroxy in the monomer to form the second crosslinked network by thermally induced step‐growth polymerization. The formation of a dual‐cure network, leading to phase separation and increased crosslinking density, could greatly improve the mechanical and thermal properties of 3?D‐printed thermosets and endow them with thermally triggered shape‐memory properties and excellent repairability. The 3?D‐printed thermosets are found to have strong luminescence resulting from aggregation‐induced emission originating from rosin. In addition, these 3?D‐printed thermosets could degrade in the presence of NaOH aqueous solution and in situ achieved a range of flexible conductive hydrogels that have important potential application in the flexible electronic materials and smart photoelectric materials.

服务人员 尚玮姣

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