胶原蛋白改性水性聚氨酯的合成及表征
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摘要
以异佛尔酮二异氰酸酯(IPDI)与聚四氢呋喃醚二醇(PTMG-2000)为原料,二羟甲基丙酸(DMPA)为扩链剂,三乙胺为中和剂制备聚氨酯预聚体。采用碱水解法水解明胶,制备胶原蛋白水解液,作为后扩链剂,在乳化分散的同时进行链增长,得到胶原蛋白改性水性聚氨酯。研究胶原蛋白改性水性聚氨酯合成过程中R值、DMPA用量对其性能的影响,采用红外(FT-IR),差热分析(DSC)等分析对制备的胶原蛋白改性水性聚氨酯胶膜进行分析。在R值为1.30,DMPA用量为0.065mol条件下,制得的胶原蛋白改性水性聚氨酯膜的各项性能较好,结晶趋势增加,耐水性得到改善,平均粒径68.33nm,延伸率为554.5%,抗张强度为5.51N/mm。
The isophorone diisocyanate(IPDI)and polytetrahydrofuran glycol(PTMG-2000)were used as the raw materials;the dimethylol propionic acid was used as the chain extender.Then the triethylamine was used as the neutralizer to prepare the polyurethane prepolymer.The collagen protein which was prepared by alkaline hydrolysis method was used as the after-chain extender.On this basis,the polyurethane prepolymer was added into the collagen protein to emulsify and extend chains.The collagen protein modified waterborne polyurethane was prepared.The influences of Rvalue and the DMPA dosage to the properties of polyurethane were studied.The FT-IR and DSC were employed to analyze the structure of polyurethane.The experimental result indicated that when the R value was 1.30,the dosage of DMPA was 0.065 mol,the performances of polyurethane were good.The crystallization trend of polyurethane film increased with the addition of collagen protein.Meanwhile,the water resisting property improved,too.The average particle size of emulsion was 68.33 nm,the elongation at break was 554.5%,and the tensile strength was5.51 N/mm.
The isophorone diisocyanate(IPDI)and polytetrahydrofuran glycol(PTMG-2000)were used as the raw materials;the dimethylol propionic acid was used as the chain extender.Then the triethylamine was used as the neutralizer to prepare the polyurethane prepolymer.The collagen protein which was prepared by alkaline hydrolysis method was used as the after-chain extender.On this basis,the polyurethane prepolymer was added into the collagen protein to emulsify and extend chains.The collagen protein modified waterborne polyurethane was prepared.The influences of Rvalue and the DMPA dosage to the properties of polyurethane were studied.The FT-IR and DSC were employed to analyze the structure of polyurethane.The experimental result indicated that when the R value was 1.30,the dosage of DMPA was 0.065 mol,the performances of polyurethane were good.The crystallization trend of polyurethane film increased with the addition of collagen protein.Meanwhile,the water resisting property improved,too.The average particle size of emulsion was 68.33 nm,the elongation at break was 554.5%,and the tensile strength was5.51 N/mm.
引文
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[2]商跃美.基于废弃皮胶原造纸施胶剂的制备及生物降解性研究[D].西安:陕西科技大学,2016.
[3]靳园敏,王鸿儒.水性聚氨酯/明胶共聚物的制备及表征[J].精细化工,2011,28(12):1145-1149,1153.
[4]庞晓燕,丁志文,马兆国.聚氨酯改性胶原蛋白的机理及应用研究(1)-氨基酸与甲苯二异氰酸酯的反应[J].中国皮革,2008,37(21):32-27,42.
[5]徐恒志,王焕,张威,等.芳香族聚酯型水性聚氨酯乳液的合成及性能研究[J].合成技术,2011(1):12-16,34.
[6]宗亦珊.水性聚氨酯-丙烯酸酯复合乳液的制备及其改性研究[D].西安:陕西科技大学,2014.
[7]夏宇正,寇红叶,石淑先,等.磺酸/羧酸型水性聚氨酯分散体粒径的影响因素[J].北京化工大学学报(自然科学版),2015,42(3):62-66.
[8]罗宗武,马建中,周建华.胍胶改性水性聚氨酯的合成及性能研究[J].中国皮革,2017,46(12):20-29.
[9]王学川,张斐斐,强涛涛,等.胶原纤维对水中Cr(Ⅵ)的吸附性能研究[J].功能材料,2013,44(6):795-799,804.
[10]徐廷旺.甲酯化桐油改性水性聚氨酯乳液的制备及性能研究[D].张家界:吉首大学,2012.
[11]马园园.蓖麻油、双端羟基聚硅氧烷改性水性聚氨酯的制备及应用[D].杭州:浙江理工大学,2015.
[12]彭文奇.高固含水性聚氨酯的合成及其结晶性的研究[D].广州:华南理工大学,2010.
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