水性乙烯基单体接枝共聚改善杨木性能的研究
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摘要
为探究环保的木材改性方法,以水溶性乙烯基单体甲基丙烯酸-2-羟乙酯(HEMA)和N-羟甲基丙烯酰胺(NMA)为改性剂,处理速生杨木,并考察改性剂配比、浓度对改性材性能的影响。结果表明,改性剂HEMA与NMA的质量比为80∶20、浓度40%时,改性材增重率为40.46%,抗体积膨胀率为60.77%,抗弯强度和弹性模量分别提高20.19%和38%;且同样的改性效果时,该改性剂相比传统改性处理所需的处理温度低、用量少。
In order to develop environmentally-friendly wood modification methods,water soluble vinyl monomers,2-hydroxyethyl methacrylate(HEMA)and N-methylol acrylamide(NMA)were used as modifiers to treat poplar wood from plantation forests.Effects of addition ratio and concentration of the modifiers on performance of the treated wood were investigated.Results showed that 40.46%of weight percent gain(WPG),60.77%of anti-volume swelling efficiency(ASE),20.19%of modulus of rupture(MOR)and 38.00%of modulus of elasticity(MOE)of the treated samples were obtained by optimum treatment processes such as 80∶20 of HEMA/NMA addition ratio and40%of modifiers concentration.Therefore,wood modification could be conducted under lower treatment temperature with less modifier usage,compared to traditional modification methods.
In order to develop environmentally-friendly wood modification methods,water soluble vinyl monomers,2-hydroxyethyl methacrylate(HEMA)and N-methylol acrylamide(NMA)were used as modifiers to treat poplar wood from plantation forests.Effects of addition ratio and concentration of the modifiers on performance of the treated wood were investigated.Results showed that 40.46%of weight percent gain(WPG),60.77%of anti-volume swelling efficiency(ASE),20.19%of modulus of rupture(MOR)and 38.00%of modulus of elasticity(MOE)of the treated samples were obtained by optimum treatment processes such as 80∶20 of HEMA/NMA addition ratio and40%of modifiers concentration.Therefore,wood modification could be conducted under lower treatment temperature with less modifier usage,compared to traditional modification methods.
引文
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[10]Gao B,Hu H,Gu uo J,et al.Preparaa tion of polymetha acrylic acid-grafte d HEMA/PVP mi crospheres and p reliminary study on basic protei n adsorption.[J].Colloids&Surfaa ces B Biointerfa aces,2010,77(2)):206-213.
[11]Ren X,Qiu R,Li K.Modificatioo ns of kenaf fiber rs with N-methylo ol acrylamide for pr roduction of kenaff-unsaturated polye ester composites[J]].Journal of Applie ed Polymer Sciencee,2012,125(4):28846-2853.
[2]何文,蒋身学,张齐生,等.单体体原位聚合改性杨杨木性能的评价[J]].木材工业,2013,27(1):17-20.
[3]Ermeydan M A,Cabane E,Gierlinn ger N,et al.Imp provement of woo d material properti ies via in situ polyy merization of sty rene into tosylate d cell walls[J].RSCC Advances,2014,,4(25):12981-12988.
[4]Hazarika A,Baishya P,Maji T K.Bio-base d wood polyme er nanocomposites:A sustainablee high-performan nce material fo or future[M]//Eco-ffr riendly Polymer NNanocomposites.Sp pringer India,20155:233-257.
[5]刘振,黄建琴,崔崔爱华.医用纱布布与丙烯酸、N-羟甲甲基丙烯酰胺混合合单体接枝共聚的的研究[J].材料导报报,2010,24(s1):389-391.
[6]Figueiredo A GG P R,Figueiredoo A R P,Alonso o-Varona A,et a l.Biocompatible b bacterial cellulose--poly(2-hydroxye ethyl methacrylate e)nanocomposite ffi ilms[J].Bio Med RResearch Internatio onal,2013,2013(3)):698141.
[7]Liu X,Xu Y,Yu u J,et al.Integratt ion of lignin and d acrylic monomer rs towards grafted d copolymers bb y free radical polymerization[J]].International Jo urnal of Biologii cal Macromolecu ules,2014,67(3)):483-489.
[8]Mattos B D,de Cademartori P HG,Missio A L,et t al.Wood-polyme er composites prep pared by free rr adical in situ polymerization o of methacrylate mo onomers into fast-gg rowing pinewood d[J].Wood Scienc ce and Technology,2015,49(6):1281-1294.
[9]Sun W,Shen H,,Cao J.Modifica tion of wood by glutaraldehyde an nd poly(vinyl alcoh hol)[J].Materials&&Design,2016,96:392-400.
[10]Gao B,Hu H,Gu uo J,et al.Preparaa tion of polymetha acrylic acid-grafte d HEMA/PVP mi crospheres and p reliminary study on basic protei n adsorption.[J].Colloids&Surfaa ces B Biointerfa aces,2010,77(2)):206-213.
[11]Ren X,Qiu R,Li K.Modificatioo ns of kenaf fiber rs with N-methylo ol acrylamide for pr roduction of kenaff-unsaturated polye ester composites[J]].Journal of Applie ed Polymer Sciencee,2012,125(4):28846-2853.