改性淀粉胶黏剂的研制

184Vol.18No.4CHINAWOODINDUSTRY20047July2004:20040108:(1972),,,;:,刘景宏,林巧佳,杨桂娣(,350002):利用氧化缩聚交联等方法可提高淀粉胶黏剂的耐水性以次氯酸钠聚乙烯醇丙烯酰胺甲苯二异氰酸酯用量为变量,通过正交试验确定的最佳制胶配方为:在100g玉米淀粉中添加次氯酸钠溶液30mL聚乙烯醇4g丙烯酰胺24g及主剂重10%的甲苯二异氰酸酯测试结果表明,按此配方制得的淀粉胶黏剂的胶合性能指标成本等与UF树脂胶相当,可替代UF类树脂,解决产品中甲醛气体的释放问题:淀粉胶黏剂;改性;胶合强度;耐水性中图分类号:TQ432.2文献标识码:A文章编号:10018654(2004)04000804StudyonModifyingStarchAdhesiveforPlywoodManufacturingLIUJinghong,LINQiaojia,YANGGuidi(FujianAgricultureandForestryUniversity,Fuzhou350002,China)Abstract:Achemicalmodificationbyoxidationexperimentwasdesignedtoimprovethewaterresistanceofstarchadhesive.Thetheoryandtechnologyoftheprocess,andoptimumlevelofconcentrationdeterminedbyorthogonalexperimentation,aredescribedinthispaper.Thestarchadhesivewasmodifiedwith100g.ofmaizestarch,30mLsodiumhypochlorite,4g.polyvinylalcohol,24g.acrylamide,and10%toluylenediisocyanatebasedontheweightofthepolymericstarchadhesive.ThetestresultsshowedthatitswetbondstrengthforplywoodwasabletomeettherequirementsfortypeplywoodintheNationalStandardGB9846.488.Moreover,thecostofmodifiedstarchadhesivewascomparabletocommonUFresinadhesive.Thisstudyprovidedanapproachtomanufacturingplywoodwithoutformaldehydeemission.Keywords:Starchadhesive;Modify;Bondstrength;WaterresistanceUFPF,,,[1],[2],,,,,,1,,,(C6H10O5)(COC)800~3000C2C3C6(OH),,,,!8!,[3,4],,,,,:(CHO)(COOH)(CONH2)(NCO),,,,,22.1,100∀99.5%,,300mm#300mm#1.3mm,8%~10%(NaOCl),,2.8%,;(PVA),1799,;(TDI),,2.2[5],PVA,[6,7],,TDI[8,9],,,,,,2.3,PVATDI,L9(34),1PVA100g,TDI45%,TDI,350g/m2(),20min:120∃,1.0MPa,3.5minGB9846.1288,11Tab.1ProcedureandresultsoforthogonalexperimentA/mLB/gC/gD/%/MPa120(1)3(1)24(1)15(1)1.06220(1)4(2)28(2)10(2)0.73320(1)5(3)32(3)5(3)0.44430(2)3(1)28(2)5(3)0.58530(2)4(2)32(3)15(1)1.57630(2)5(3)24(1)10(2)1.34740(3)3(1)32(3)10(2)0.85840(3)4(2)24(1)5(3)0.50940(3)5(3)28(2)15(1)1.27K10.740.830.971.30K21.160.930.860.97K30.871.020.950.51R0.420.190.110.792.422Tab.2Varianceanalysisofthebondstrengthofthesampleplywood0.27720.13913.9*0.05220.0262.60.02020.01010.95420.47747.7**1.3038:F0.05(2,2)=19,F0.10(2,2)=9;**0.05,*0.10:D(),A():DABC2.4.12,,,,!9!18420047(2.8%)35%,,,,,;,,,,,,,,30mL2.4.2PVAPVA,PVA,PVATDIPVA3%~5%,PVA,PVA,,TDI,PVA,,PVA,,,TDI,,,PVA,4g2.4.3,,,[10],,,,,,,,,,,(CONH2),,,,24g2.4.4TDI,TDI(NCO),:RNCO+HR1RNHCOR1,,TDI5%~15%,,,,,NCO,TDI,TDI,TDI10%,,TDI10%TDI,NCO,NCO2.4.5,:A2B2C1D2,100g,30mL,PVA4g,24g,TDI10%3,3,33Tab.3Theresultsoftheverificationtest1232/%35.433.435.134.655.0~67.0/(mPa!s,20∃)865832869855250~1000/(s,100∃)56.753.855.555.3%50(20∃)1.1871.1751.1831.182pH8.148.728.268.377.0~8.5/%0%1.0/MPa1.3711.3311.3411.35:1.3;2.GB/T147321993&UFPF∋UF(NQTRH)3,NQTRH,1.35MPa,GB984688∀0.80MPa!10!July2004CHINAWOODINDUSTRYVol.18No.4,1;,,,,4,,(,),44Tab.4Economicanalysis/(!t1)/kg/120010072*12086.45003216130004522500246020000408002405121134.4*:72kg35%45%4,(2.5/t,),UF(0.2/t,),,,51),,,,UF,2):100g,30mL,4g,24g,10%,GB9846.4883),,,,4),,,:[1].,[C]..:,1999,14.[2].[J].,1999,27(4):5052.[3].[M].:,2001,194296.[4].[M].:,1999,30198.[5].[J].,2000,15(2):3234.[6].PVA[J].,1998(3):154155.[7].[J].,2002,23(1):2627.[8].[M].:,1998,1222.[9].[J].,2000,9(4):2125.[10].[J].,1991,1(1):1718.(上接第4页)市场并替代进口产品;与俄接壤地区的木材加工企业,可多加工俄罗斯木材并直接转口到其他国家;西部地区的木材加工企业宜结合当地资源优势,以满足当地市场需求为主;内陆地区的木材加工企业,应积极为沿海地区的木材加工企业配套并满足当地市场需求,适时进行产品结构调整和技术升级换代:[1][EB/DL].,20031103.[2].[N].,20031229(05).[3].&2003∋[R].2003,12.[4].[N].,20040108(B2).[5],.[J].,2003(12):34.[6].2004[N].,20031230(12).[7].WTO[J].,2002,16(1):69,12.[8].[J].,2003,17(2):13,11.!11!18420047