木质素与L-丙交酯合成木质纤维素丁醇残渣接枝共聚物
Combination of lignin and L-lactide towards grafted copolymers from lignocellulosic butanol residue.
作者信息
Zong Enmin, Jiang Jinhua, Liu Xiaohuan, Fu Shenyuan, Xu Yuzhi, Chu Fuxiang
机构信息
Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, PR China.
Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation, Taizhou University, Taizhou 318000, PR China.
出版信息
Int J Biol Macromol. 2016 May;86:80-8. doi: 10.1016/j.ijbiomac.2016.01.043. Epub 2016 Jan 14.
A series of BBL-graft-poly (L-lactide) copolymers were synthesized via ring-opening polymerization (ROP) of L-lactide (L-LA) with a biobutanol lignin (BBL) initiator and a triazabicyclodecene (TBD) catalyst under free-solvent at 135 °C. By manipulating the mass ratio of BBL/LLA, BBL-g-PLLA copolymers with tunable number-average molecular weight (Mn) (2544-7033 g mol(-1)) were obtained. The chemical structure of PLLA chains was identifiable by FT-IR, (1)H NMR and (13)C NMR spectroscopies, in combination with UV-vis spectra to provide support for the existence of the BBL in the copolymer. This provided solid evidence for the successful synthesis of BBL-g-PLLA copolymer. The thermal properties and surface characterization of BBL-g-PLLA copolymers were different from those of linear PLLA. Furthermore, the BBL-g-PLLA copolymer film showed good absorption capacity in the UV region and high transparency in the visible light region, which was expected to find significant applications in UV-protective coating film.
通过在135℃无溶剂条件下，以生物丁醇木质素（BBL）为引发剂、三氮杂双环癸烯（TBD）为催化剂，使L-丙交酯（L-LA）进行开环聚合（ROP）反应，合成了一系列BBL-接枝-聚（L-丙交酯）共聚物。通过控制BBL/L-LA的质量比，获得了数均分子量（Mn）可调（2544 - 7033 g mol⁻¹）的BBL-g-PLLA共聚物。通过傅里叶变换红外光谱（FT-IR）、¹H核磁共振（¹H NMR）和¹³C核磁共振（¹³C NMR）光谱，结合紫外可见光谱来确定PLLA链的化学结构，以支持共聚物中BBL的存在。这为成功合成BBL-g-PLLA共聚物提供了确凿证据。BBL-g-PLLA共聚物的热性能和表面特性与线性PLLA不同。此外，BBL-g-PLLA共聚物薄膜在紫外区域显示出良好的吸收能力，在可见光区域具有高透明度，有望在紫外线防护涂膜中找到重要应用。
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