聚甲基丙烯酸甲酯-干酪素/天然胶乳改性膜的制备及性能
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摘要
采用无皂乳液聚合法,将聚甲基丙烯酸甲酯(PMMA)与干酪素(CA)接枝共聚形成PMMACA乳液,并以乳液共混的方法用其改性天然胶乳(NRL)。结果表明,PMMA-CA乳液粒子呈核-壳结构,粒径分布较窄,平均粒径约为100 nm。当PMMA-CA乳液的质量分数为12%时,PMMA-CA/NRL改性膜表面平整光滑,孔洞完全消失;力学性能最佳,拉伸强度为30.47 MPa,与NRL膜相比扯断伸长率变化不大。PMMA-CA/NRL改性膜在非极性溶剂环己烷和石油醚中的耐溶剂性较NRL膜有大幅提高。
Polymethyl methacrylate( PMMA)-casein( CA) emulsion was prepared by the graft copolymerization of PMMA and CA using surfactantfree emulsion polymerization. And the natural rubber latex( NRL) was modified with PMMA-CA using emulsion blend method. The results showed that the microstructure of PMMA-CA particles exhibited coreshell structure and narrow size distribution, the average particle size was 100 nm. When the mass fraction of PMMA-CA was 12%, the surface of PMMA-CA/NRL modified film was flat and smooth and the holes disappeared completely. And the mechanical properties of the modified film was the best,the tensile strength was 30. 47 MPa,and the elongation at break changed little compared to NRL film.The solvent resistance to nonpolar solvent cyclohexane and petroleum ether of PMMA-CA/NRL modified film improved markedly compared to NRL film.
Polymethyl methacrylate( PMMA)-casein( CA) emulsion was prepared by the graft copolymerization of PMMA and CA using surfactantfree emulsion polymerization. And the natural rubber latex( NRL) was modified with PMMA-CA using emulsion blend method. The results showed that the microstructure of PMMA-CA particles exhibited coreshell structure and narrow size distribution, the average particle size was 100 nm. When the mass fraction of PMMA-CA was 12%, the surface of PMMA-CA/NRL modified film was flat and smooth and the holes disappeared completely. And the mechanical properties of the modified film was the best,the tensile strength was 30. 47 MPa,and the elongation at break changed little compared to NRL film.The solvent resistance to nonpolar solvent cyclohexane and petroleum ether of PMMA-CA/NRL modified film improved markedly compared to NRL film.
引文
[1]Nawamawat K,Sakdapipanich J T,Ho Chee C,et al.Surface nanostructure of hevea brasiliensis natural rubber latex particles[J].Colloids and Surfaces(Part A):Physicochemical and Engineering Aspects,2011,390(1/2/3):157-166.
[2]Sanguansap K,Thonggoom R,Tangboriboonrat P.Surface modification of natural rubber film by polymerisation of methyl methacrylate in water-based system[J].European Polymer Journal,2006,42(10):2334-2342.
[3]Sirirat T,Vatanatham T,Hansupalak N,et al.Kinetics and modeling of methyl methacrylate graft copolymerization in the presence of natural rubber latex[J].Korean Journal of Chemical Engineering,2015,32(5):980-992.
[4]Saramolee P,Lopattananon N,Sahakaro K.Preparation and some properties of modified natural rubber bearing grafted poly(methyl methacrylate)and epoxide groups[J].European Polymer Journal,2014,56(8):1-10.
[5]Kovuttikulrangsie S,Sahakaro K,Intarakong C,et al.PMMA blended and DPNR-g-PMMA coated DPNR and NR-LA for dipping applications[J].Journal of Applied Polymer Science,2004,93(2):833-844.
[6]HollóB B,Szécsényi K M,Tanrattanakul V,et al.Determination of natural rubber/poly(methyl methacrylate)blend composition by TG/DSC technique[J].Journal of Thermal Analysis and Calorimetry,2014,119(2):1131-1137.
[7]Arpornwichanop T,Polpanich D,Thiramanas R,et al.PMMA-N,N,N-trimethyl chitosan nanoparticles for fabrication of antibacterial natural rubber latex gloves[J].Carbohydrate Polymers,2014,109(13):1-6.
[8]蔺海兰,廖建和,廖双泉.新型天然橡胶吸油材料的制备及性能[J].合成橡胶工业,2007,30(3):205-211.
[9]Oommen Z,Thomas Z S.Compatibility studies of natural rubber/poly(methyl methacrylate)blends by viscometry and phase separation techniques[J].Journal of Materials Science,1997,32(22):6085-6094.
[10]Ho Chee C,Khew M C,Liew Y F.Surface morphology of asymmetric latex film prepared from blends of natural rubber and poly(methyl methacrylate)latexes[J].Surface and Interface Analysis,2001,32(1):133-143.
[11]Thiraphattaraphun L,Kiatkamjornwong S,Prasassarakich P,et al.Natural rubber-g-methyl methacrylate/poly(methyl methacrylate)blends[J].Journal of Applied Polymer Science,2001,81(2):428-439.
[12]Horne D S.Casein structure,self-assembly and gelation[J].Current Opinion in Colloids and Interface Science,2002,7(5):456-461.
[13]Li Pei,Zhu Junmin,Sunintaboon P,et al.New route to amphiphilic core-shell polymer nanospheres:Graft copolymerization of methyl methacrylate from water-soluble polymer chains containing amino groups[J].Langmuir,2002,18(22):8641-8646.
[14]Zhu Junmin,Li Pei.Synthesis and characterization of poly(methyl methacrylate)/casein nanoparticles with a well-defined core-shell structure[J].Journal of Polymer Science(Part A):Polymer Chemistry,2003,41(21):3346-3353.
[15]肖焕秀,敖宁建,谭海生.耐溶剂改性天然橡胶表面细微结构的研究[J].广东化工,2007,34(12):18-20.
[2]Sanguansap K,Thonggoom R,Tangboriboonrat P.Surface modification of natural rubber film by polymerisation of methyl methacrylate in water-based system[J].European Polymer Journal,2006,42(10):2334-2342.
[3]Sirirat T,Vatanatham T,Hansupalak N,et al.Kinetics and modeling of methyl methacrylate graft copolymerization in the presence of natural rubber latex[J].Korean Journal of Chemical Engineering,2015,32(5):980-992.
[4]Saramolee P,Lopattananon N,Sahakaro K.Preparation and some properties of modified natural rubber bearing grafted poly(methyl methacrylate)and epoxide groups[J].European Polymer Journal,2014,56(8):1-10.
[5]Kovuttikulrangsie S,Sahakaro K,Intarakong C,et al.PMMA blended and DPNR-g-PMMA coated DPNR and NR-LA for dipping applications[J].Journal of Applied Polymer Science,2004,93(2):833-844.
[6]HollóB B,Szécsényi K M,Tanrattanakul V,et al.Determination of natural rubber/poly(methyl methacrylate)blend composition by TG/DSC technique[J].Journal of Thermal Analysis and Calorimetry,2014,119(2):1131-1137.
[7]Arpornwichanop T,Polpanich D,Thiramanas R,et al.PMMA-N,N,N-trimethyl chitosan nanoparticles for fabrication of antibacterial natural rubber latex gloves[J].Carbohydrate Polymers,2014,109(13):1-6.
[8]蔺海兰,廖建和,廖双泉.新型天然橡胶吸油材料的制备及性能[J].合成橡胶工业,2007,30(3):205-211.
[9]Oommen Z,Thomas Z S.Compatibility studies of natural rubber/poly(methyl methacrylate)blends by viscometry and phase separation techniques[J].Journal of Materials Science,1997,32(22):6085-6094.
[10]Ho Chee C,Khew M C,Liew Y F.Surface morphology of asymmetric latex film prepared from blends of natural rubber and poly(methyl methacrylate)latexes[J].Surface and Interface Analysis,2001,32(1):133-143.
[11]Thiraphattaraphun L,Kiatkamjornwong S,Prasassarakich P,et al.Natural rubber-g-methyl methacrylate/poly(methyl methacrylate)blends[J].Journal of Applied Polymer Science,2001,81(2):428-439.
[12]Horne D S.Casein structure,self-assembly and gelation[J].Current Opinion in Colloids and Interface Science,2002,7(5):456-461.
[13]Li Pei,Zhu Junmin,Sunintaboon P,et al.New route to amphiphilic core-shell polymer nanospheres:Graft copolymerization of methyl methacrylate from water-soluble polymer chains containing amino groups[J].Langmuir,2002,18(22):8641-8646.
[14]Zhu Junmin,Li Pei.Synthesis and characterization of poly(methyl methacrylate)/casein nanoparticles with a well-defined core-shell structure[J].Journal of Polymer Science(Part A):Polymer Chemistry,2003,41(21):3346-3353.
[15]肖焕秀,敖宁建,谭海生.耐溶剂改性天然橡胶表面细微结构的研究[J].广东化工,2007,34(12):18-20.