作 者：
程生媛;殷豪;陈麦全;赵建良;赵丹丹;陈奶荣
关键词：
废报纸;脱脂豆粉;大豆基胶黏剂;耐沸水性能
摘 要：
为制备高性价比的大豆基胶黏剂,研究废报纸粉末参与交联增强的大豆基胶黏剂耐沸水性能。结果表明:当废报纸粉末、脱脂豆粉、聚酰胺环氧氯丙烷、去离子水的质量分数分别为9.47%,23.72%,36.00%和30.81%时,所制胶黏剂固化后胶合板耐沸水性能最好;以热压工艺130℃、1.0 MPa、1.96 min/mm制备的巨尾桉胶合板胶合强度为1.16 MPa,相比对照组提高了61.1%;保持热压温度和压力不变,当热压时间为0.59 min/mm时,胶合强度为0.82 MPa,延长热压时间至3.92 min/mm,胶合强度可提高64.6%;保持热压时间和压力不变,当热压温度为60℃时,胶合强度为0.65 MPa,提高热压温度,胶合强度有所上升。X射线光电子能谱分析表明,废报纸粉末中的羟基和羧基可与胶黏剂中的氮杂环反应形成酯键及醚键,参与胶黏剂的固化过程;扫描电子显微镜观测到废报纸粉末的纤维与其他胶黏剂组分形成了复合结构,固化后的胶黏剂样品结构致密,空隙少。废报纸原料参与大豆基胶黏剂的固化交联反应,减少了脱脂豆粉用量,可降低胶黏剂成本;制备的大豆基胶黏剂耐水性有所提高,可在较短时间和较低温度下固化,适宜制备耐水性要求更高的产品。
译 名：
Preparation of waste newspaper reinforced soy-based adhesive and its boiling water resistance performance
作 者：
CHENG Shengyuan;YIN Hao;CHEN Maiquan;ZHAO Jianliang;ZHAO DANDan;CHEN Nairong;College of Material Engineering,Fujian Agriculture and Forestry University;
关键词：
waste newspaper;;defatted soybean flour;;soy-based adhesive;;boiling water resistance performance
摘 要：
AbBtract:Wood-based composites(e.g.plywood) are widely used to make furniture and building,while they are mainly bonded with formaldehyde-based and/or petroleum-based resins that cause serious health and environmental problems.Due to health concerns and reduced petroleum reserves,researchers have been trying to replace conventional formaldehyde-based and petroleum-derived resins with sustainable and environmentally friendly biomass derived resins for making wood-based composites.A f o rm aldehyde-free bio-adhesive composed of waste newspaper powder(WNP),defatted soybean flour(DSF),and polyamidoamine-epichlorohydrin(PAE) resin was developed to prepare the Eucalyptus urophydis-based three-layer plywood.The effects of WNP content,hot-pressing temperature and hotpressing time on the bonding strength of the adhesive were evaluated by the shear strength of the plywood via the three-hour boiling water soaking test.The results showed that the shear strength was improved as the increase of the WNP content.All the plywood samples bonded with the pure DSF adhesive were delaminated in the boiling water test.When PAE was added,the shear strength of plywood reached 0.72 MPa,and reached the highest shear strength(1.16 MPa) when 9.47% WNP was further added.The interaction between hot-pressing time and temperature affected the shear strength significantly.The shear strength improved firstly and then decreased as the hot-pressing time increased.When the hot-pressing time was 0.59 min/mm,the shear strength was 0.82 MPa.When the hot-pressing time increased to 3.92 min/mm,the maximum shear strength of 1.35 MPa was obtained.The shear strength improved with the increase of hot-pressing temperature.The shear strength was 0.65 MPa at the hot-pressing temperature of 60 ℃.Plywood hot-pressed at the temperature of 110 showed the shear strength of 1.07 MPa,exceeding that of the 60 ℃by 64.6%.The curing temperature of the adhesive was comparable to the commercial urea-formaldehyde resin,while displayed better gluability.The X-ray photoelectron spectroscopy analysis indicated that the carboxyl and hydroxyl groups in WNP were participated in the chemical cross-linking reactions along with hydroxyl-azetidinium ring groups in polyamide epichlorohydrin to form the ether and ester bonds,which in turn improved water resistance of the cured WNP-DSF-PAE adhesives.The scanning electron microscope analysis indicated that the fibers of WNP were formed a composite structure with other adhesive components,resulting in the cured adhesive with a dense structure and few cracks.The use of WNP as a component in bio-based adhesives may reduce the cost as a result of the decreased DSF consumption.The adhesive characteristics including excellent water resistance and fast curing performance showed great potential to produce plywood with high moisture resistance.
