载药聚丙烯酸/聚乙二醇半互穿聚合物网络在木材中的原位构建及其性能

doi:10.11707/j.1001-7488.20161116

林业科学 ›› 2016, Vol. 52 ›› Issue (11): 134-141.doi: 10.11707/j.1001-7488.20161116

载药聚丙烯酸/聚乙二醇半互穿聚合物网络在木材中的原位构建及其性能

刘彬彬¹, 孙芳利¹, 吴华平¹, 杨秀树¹, 饶瑾¹, Nayebare Kakwara Prosper¹, 徐君庭²

1. 浙江农林大学工程学院临安 311300;
2. 浙江大学高分子科学与工程学院杭州 310058

收稿日期:2015-11-12 修回日期:2016-10-11 出版日期:2016-11-25 发布日期:2016-12-16
通讯作者: 孙芳利
基金资助:
国家自然科学基金项目（31470587）；浙江省自然科学基金重点项目（Z14C160009）。

Construction of Drug-Loaded Polyacrylate/Polyethylene Glycol Semi-Interpenetrating Network Structure in Wood and Its Performances

Liu Binbin¹, Sun Fangli¹, Wu Huaping¹, Yang Xiushu¹, Rao Jin¹, Nayebare Kakwara Prosper¹, Xu Junting²

1. School of Engineering, Zhejiang Agricuture and Forestry University Lin'an 311300;
2. School of Polymer Science and Engineering, Zhejiang University Hangzhou 310058

Received:2015-11-12 Revised:2016-10-11 Online:2016-11-25 Published:2016-12-16

摘要/Abstract

摘要： [目的] 在木材中原位构建载药半互穿聚合物网络体系，以提高木材耐腐性，改善木材的尺寸稳定性。[方法] 以丙烯酸为单体，过硫酸铵为引发剂，N，N'-亚甲基双丙烯酰胺为交联剂，在聚乙二醇存在下原位反应，一步法合成聚丙烯酸/聚乙二醇半互穿聚合物网络（PAA/PEG SIPN）。研究交联剂含量对聚合物性能的影响，并采用傅里叶变换红外光谱（FTIR）、扫描电镜（SEM）、透射电镜（TEM）对其结构和形貌进行表征。采用真空浸渍法将质量百分比为0.5%的丙环唑纳米制剂和反应物注入木材中，使其在木材内部进行原位反应并交联，测试处理后木材的尺寸稳定性和室内耐腐性。[结果] FTIR分析表明，PAA和PEG除形成氢键外，还能通过交联剂形成相对牢固的化学结合。SEM 和TEM结果发现，聚乙二醇较均匀地分散在聚丙烯酸中，形成相互贯穿的网络结构。在一定范围内，随着交联剂含量的增加，聚合物的溶胀性能减弱，强度增大。相对于未处理材，处理材的干缩湿胀性得到明显改善。室内耐腐性试验表明，处理材的药剂抗流失性和耐腐性得到明显提高。[结论] 本文所及处理方法能够在一定程度上提高木材的尺寸稳定性和防腐性能，虽然对尺寸稳定性的作用尚未达到理想状态，但可为木材的改性处理提供一种新思路。

关键词: 载药半互穿网络, 聚丙烯酸, 聚乙二醇, 木材尺寸稳定性, 防腐性能

Abstract: [Objective] Decay and cracks are the main factors which shorten the service life of oudoor wood. In this study, drug-loaded semi-interpenetrating network and in situ constructed in wood were investigated, in order to improve the decay resistance as well as the dimensional stability.[Method] Polyacrylate/polyethylene glycol(PAA/PEG) polymer alloy with semi-interpenetrating network (SIPN) structure was prepared by one-step polymerization. The relationship between the amount of crosslinker and polymer performance was then studied. The prepared SIPN polymer alloy was characterized by infrared spectroscopy(IR), scanning electron microscope(SEM) and transmission electron microscope(TEM).Populus tomentosa wood was impregnated with 0.5% propiconazole nanoemulsion, acrylic acid, PEG, initiator and crosslinker under vacuum, then in situ polymerized. The dimensional stability and decay resistance properties of wood were also measured. [Result] FTIR results showed that PAA and PEG formed strong H-bond, and the crosslinker might chemically connected them. SEM and TEM indicated that PEG was uniformly dispersed in PAA to form a phase-separate structure. An interpenetrated interface could be observed. Additionally, the dimensional stability tests of wood via three wet-dry cycles showed that the treated wood exhibited minor shrinkage and swelling. The decay resistances of drug-loaded SIPN were greatly improved. [Conclusion] Though the dimensional stability did not meet the expected results, this paper provided a new way to simultaneously improve the dimensional stability and fungi resistances.

Key words: drug-loaded semi-interpenetrating network, polyacrylate(PAA), polyethylene glycol(PEG), dimensional stability of wood, decay resistance

中图分类号:

S781.4

刘彬彬, 孙芳利, 吴华平, 杨秀树, 饶瑾, Nayebare Kakwara Prosper, 徐君庭. 载药聚丙烯酸/聚乙二醇半互穿聚合物网络在木材中的原位构建及其性能[J]. 林业科学, 2016, 52(11): 134-141.

Liu Binbin, Sun Fangli, Wu Huaping, Yang Xiushu, Rao Jin, Nayebare Kakwara Prosper, Xu Junting. Construction of Drug-Loaded Polyacrylate/Polyethylene Glycol Semi-Interpenetrating Network Structure in Wood and Its Performances[J]. Scientia Silvae Sinicae, 2016, 52(11): 134-141.

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载药聚丙烯酸/聚乙二醇半互穿聚合物网络在木材中的原位构建及其性能

Construction of Drug-Loaded Polyacrylate/Polyethylene Glycol Semi-Interpenetrating Network Structure in Wood and Its Performances

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