Mechanical, Thermal, and Morphological Properties of PLA Biocomposites Toughened With Silylated Bamboo Cellulose Nanowhiskers
Mechanical, Thermal, and Morphological Properties of PLA Biocomposites Toughened With Silylated Bamboo Cellulose Nanowhiskers
复制标题
硅烷化竹纤维素纳米晶须增韧 PLA 生物复合材料的机械、热和形态性能
DOI：
10.1002/pc.25144
复制
发表时间：
--
影响因子：
5.2
通讯作者：
Linqiong Xu
中科院分区：
文献类型：
--
作者：
Yaorui Ma;Shaoping Qian;Lang Hu;Jun Qian;Cesar A. Fontanillo Lopez;Linqiong Xu
为了改善疏水性聚乳酸（PLA）与亲水性竹纤维素纳米晶须（BCNW）之间的表面相容性，采用4种市售硅烷偶联剂对PLA/BCNW界面进行不同浓度（0、1、8和16wt%）的改性。采用溶液浇铸法制备了PLA/BCNW生物复合膜。研究了硅烷化BCNW对PLA生物复合材料的热性能、力学性能和形态学性能的影响。通过Si-O-C键和氢键，证实了偶联剂与纤维素之间的偶联反应。拉伸强度和拉伸模量均随四种硅烷处理而降低。相对于12.4%的未处理复合材料，在16重量% A-151、8重量% A-1100、8重量% A-174和8重量% A-189硅烷处理后，最大断裂伸长率值分别增加至213.8、111.3、255.3和209.8%。在拉伸断裂表面上观察到拉丝现象。玻璃化转变温度和结晶度降低后，表面改性。Polym.比较器：40：3012-3019，2019.© 2018塑料工程师协会
To improve the surface compatibility between hydrophobic poly(lactic acid) (PLA) and hydrophilic bamboo cellulose nanowhiskers (BCNWs), four commercial available silane coupling agents were employed to modify their interfaces with different concentrations (0, 1, 8, and 16 wt%). PLA/BCNW biocomposite films were fabricated by solution casting. The effects of silylated BCNW on the thermal, mechanical, and morphological properties of PLA biocomposites were investigated. The coupled reaction between coupling agents and celluloseviaSi‐O‐C bonding and hydrogen bonding was confirmed. Both, tensile strength and tensile modulus, decreased with the four silane treatments. The maximum elongation at break values increased to 213.8, 111.3, 255.3, and 209.8% after 16 wt% A‐151, 8 wt% A‐1100, 8 wt% A‐174, and 8 wt% A‐189 silane treatments, respectively, with respect to 12.4% of the untreated composite. A wire‐drawing phenomenon was observed on the tensile fractural surface. Glass transition temperature and crystallinity decreased after the surface modifications. POLYM. COMPOS., 40:3012–3019, 2019. © 2018 Society of Plastics Engineers