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首页> 外文会议>International Conference on Materials and Metallurgical Engineering and Technology >Effect of cellulose nanocrystals (CNC) addition and citric acid as co-plasticizer on physical properties of sago starch biocomposite
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Effect of cellulose nanocrystals (CNC) addition and citric acid as co-plasticizer on physical properties of sago starch biocomposite

机译：纤维素纳米晶体（CNC）加成和柠檬酸作为共增塑剂对Sago淀粉生物复合物理性质的共增塑剂

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Cellulose has potential applications in new high-performance materials with low environmental impact. Rattan biomass is a fiber waste from processing industry of rattan which contains 37,6% cellulose. The high cellulose contents of rattan biomass make it a source of cellulose nanocrystals as a filler in biocomposite. Isolation of alpha cellulose from biomass rattan was prepared by using three stages: delignification, alkalization, and bleaching. It was delignificated with 3,5% HNO_3 and NaNO_2, precipitated with 17,5% NaOH, bleaching process with 10% H_2O_2. Nanocrystals obtained through the hydrolysis of alpha cellulose using 45% H_2SO_4 and followed by mechanical processes of ultrasonication, centrifugation, and filtration with a dialysis membrane. Sago starch biocomposites were prepared using a solution casting method, which includes 1-4 wt % cellulose nanocrystals rattan biomass as fillers, 10-40 wt% citric acid as co-plasticizer and 30 wt% glycerol as plasticizer. The results of TEM and FTIR characteristic of cellulose nanocrystals show spherical like shape FTIR and chemical composition analysis demonstrated that lignin and hemicellulose structures were successfully removed. Biocomposite characteristic consists of density and water absorption. The results showed the highest density values were 0,266 gram/cm~3 obtained at an additional of 3% cellulose nanocrystals rattan biomass and 30% citric acid. The lowest water absorption was 7,893% obtained at an additional of 4% cellulose nanocrystals rattan biomass and 10% citric acid.
机译：纤维素在新的高性能材料中具有低环境影响的潜在应用。藤生物量是藤化纤维废物，其含有37,6％纤维素。藤化生物质的高纤维素含量使其成为生物复合材料中作为填料的纤维素纳米晶体的来源。通过使用三个阶段，制备来自生物量藤制的α纤维素的分离：脱氨酸，碱化和漂白剂。它与3,5％HNO_3和NaNO_2有了多态化，用17,5％的NaOH沉淀，漂白过程，10％H_2O_2。通过使用45％H_2SO_4的α纤维素水解获得的纳米晶体，然后用透析膜的超声处理，离心和过滤的机械过程。使用溶液铸造方法制备Sago淀粉生物复合材料，其包括1-4wt％纤维素纳米晶体藤制生物质作为填料，10-40wt％柠檬酸作为共增塑剂和30wt％甘油作为增塑剂。纤维素纳米晶体的TEM和FTIR特征的结果表明球形形状FTIR和化学成分分析证明了木质素和半纤维素结构被成功除去。生物复合特性由密度和吸水性组成。结果表明，在额外的3％纤维素纳米晶体藤化生物质和30％柠檬酸中获得的最高密度值为0.266克/ cm〜3。在4％纤维素纳米晶体藤化生物质和10％柠檬酸中，最低吸水率为7,893％。

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