Ye De-zhan, Jiang Li, Hu Xiao-qin, Zhang Ming-hua, Zhang Xi
Polymer Research Institute, Sichuan University, Chengdu 610065, PR China; State Key Laboratory of Polymer Material Engineering, Sichuan University, Chengdu 610065, PR China.
Polymer Research Institute, Sichuan University, Chengdu 610065, PR China; State Key Laboratory of Polymer Material Engineering, Sichuan University, Chengdu 610065, PR China.
Int J Biol Macromol. 2016 Feb;83:209-15. doi: 10.1016/j.ijbiomac.2015.11.064. Epub 2015 Dec 2.
Recently, there has been a growing research interest on renewable composite due to sustainability concerns. This work demonstrated the possibility of using eucalyptus lignosulfonate calcium (HLS) particles as reinforcement in polyvinyl alcohol (PVA) matrix. 41% and 384.7% improvement of pure PVA tensile strength and Young's modulus were achieved with incorporation of 5 wt% HLS. The above results were ascribed to specific intermolecular interactions between HLS and PVA, suggested by the increasing PVA glass transition and crystalline relaxations temperature, depression of melting point with HLS incorporation. Moreover, this interaction was quantitatively determined by q value of -62.4±10.0 in Kwei equation. Additionally, the remarkable red shift of wavenumber corresponding to hydroxyl group also indicated the formation of strong hydrogen bond in HLS/PVA blend. SEM characterization confirmed that HLS/PVA blends are at least miscible.
近年来，出于对可持续性的关注，对可再生复合材料的研究兴趣日益浓厚。这项工作证明了使用桉木木质素磺酸钙（HLS）颗粒作为聚乙烯醇（PVA）基体增强剂的可能性。加入5 wt%的HLS后，纯PVA的拉伸强度和杨氏模量分别提高了41%和384.7%。上述结果归因于HLS与PVA之间特定的分子间相互作用，这由PVA玻璃化转变温度和结晶松弛温度的升高、加入HLS后熔点的降低所表明。此外，这种相互作用通过Kwei方程中-62.4±10.0的q值进行了定量测定。此外，对应于羟基的波数显著红移也表明HLS/PVA共混物中形成了强氢键。扫描电子显微镜表征证实HLS/PVA共混物至少是可混溶的。
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