共查询到18条相似文献,搜索用时 109 毫秒
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微晶纤维素改性大豆蛋白胶黏剂的黏结性能及热压工艺的研究 总被引:4,自引:4,他引:0
应用微晶纤维素和尿素溶液对大豆分离蛋白进行改性,得到了一系列大豆蛋白胶黏剂,考察了微晶纤维素含量、尿素浓度对胶黏剂胶黏强度的影响;进一步优化了胶黏剂的热压条件。实验结果表明:微晶纤维素改性大豆蛋白胶黏剂(MSP)的胶黏强度比未改性大豆蛋白胶黏剂的大,微晶纤维素含量对改性大豆蛋白胶黏剂胶黏强度的影响存在一个最佳值;微晶纤维素和尿素共同改性大豆蛋白胶黏剂相比仅有微晶纤维素改性的大豆蛋白胶黏剂,其胶黏强度进一步提高。研究MSP热压条件发现,其最佳热压条件为:热压温度100℃;热压压力2 MPa;热压时间10 min。 相似文献
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氯丁胶粘剂拉伸粘接强度影响因素的探讨 总被引:2,自引:0,他引:2
研究了改性氯丁胶粘剂的制备方法,探讨了施工工艺、填料、改性树脂对氯丁胶粘剂拉伸粘接强度的影响。制成的氯丁胶粘剂的拉伸粘接强度达2.0MPa以上。 相似文献
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通过单因素实验和正交实验,以胶粘剂对基材(丁苯橡胶-丁苯橡胶)的剪切强度为依据,确定了用氨基硅油和环氧树脂改性聚氨酯胶粘剂时,制备聚氨酯预聚体的单体甲苯二异氰酸酯(TDI)和聚醚二元醇(DL2000)的恰当配比,氨基硅油和环氧树脂的恰当添加量,以及恰当的反应时间和反应温度。通过热分析技术(TG-DSC),对比分析了未改性胶粘剂和二元改性胶粘剂的热性能;最后对比检测了未改性胶粘剂和二元改性胶粘剂对不同基材的剪切强度以及自身的各种性能。实验结果表明:二元改性聚氨酯胶粘剂对各种基材具有较高的粘接强度,其自身具有良好的附着力、较低的吸水率、较好的热稳定性和耐酸碱性能。 相似文献
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大豆蛋白胶黏剂以植物蛋白质大分子为主要原料,自身存在相对分子质量大、黏度高、流动性差等突出问题,同时大豆蛋白质分子结构复杂、空间位阻大,大量的高活性基团和疏水性基团被复杂大分子链段包裹遮蔽,导致大豆蛋白胶黏剂在木材表面涂布性能差、胶层界面分布不均、耐水胶合强度低,阻碍了其工业化推广和应用。文中探究了造成大豆蛋白胶黏剂高黏度的分子及超分子结构机理,并综述了国内外研究人员针对降低大豆蛋白胶黏剂黏度的最新进展。通过以物理改性、化学改性和生物改性分类归纳,发现通过改变大豆蛋白的二、三、四级结构,对复杂分子结构进行疏解,可有效降低大豆蛋白胶黏剂的黏度、延长储存期、改善界面涂布性能、提高胶合强度。 相似文献
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目的 改进大豆蛋白胶易霉变、储存时间短,将其作为胶黏剂使用制备的板材性能低等缺点,提高胶合板的使用寿命,使板材的适用范围和领域得以拓宽。方法 通过综述大豆蛋白胶和胶合板易发霉原因,以及近年来国内外在针对大豆蛋白胶和胶合板防霉性能方面的研究进展,分析其改性原理以及仍存在的问题,介绍原子转移自由基聚合(ATRP)法目前在豆胶改性中的应用。结论 采用ATRP法对大豆蛋白胶黏剂进行防霉接枝改性,可在保证胶合强度的同时延长胶合板使用时间,为今后制备具有优良防霉性能的大豆蛋白胶合板以及工业化推广提供新思路。 相似文献
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Jing Sun Juanjuan Su Chao Ma Robert Göstl Andreas Herrmann Kai Liu Hongjie Zhang 《Advanced materials (Deerfield Beach, Fla.)》2020,32(6):1906360
Protein-based structural biomaterials are of great interest for various applications because the sequence flexibility within the proteins may result in their improved mechanical and structural integrity and tunability. As the two representative examples, protein-based adhesives and fibers have attracted tremendous attention. The typical protein adhesives, which are secreted by mussels, sandcastle worms, barnacles, and caddisfly larvae, exhibit robust underwater adhesion performance. In order to mimic the adhesion performance of these marine organisms, two main biological adhesives are presented, including genetically engineered protein-based adhesives and biomimetic chemically synthetized adhesives. Moreover, various protein-based fibers inspired by spider and silkworm proteins, collagen, elastin, and resilin are studied extensively. The achievements in synthesis and fabrication of structural biomaterials by DNA recombinant technology and chemical regeneration certainly will accelerate the explorations and applications of protein-based adhesives and fibers in wound healing, tissue regeneration, drug delivery, biosensors, and other high-tech applications. However, the mechanical properties of the biological structural materials still do not match those of natural systems. More efforts need to be devoted to the study of the interplay of the protein structure, cohesion and adhesion effects, fiber processing, and mechanical performance. 相似文献
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不含"三苯"高性能鞋用胶粘剂的研制 总被引:3,自引:0,他引:3
针对传统鞋用胶粘剂溶剂中所含“三苯”溶剂的毒性问题,研制了开发了不含“三苯”的高性能鞋用接枝氯丁胶粘剂和聚氨酯胶粘剂,并就合成过程中各种因素对胶粘剂性能的影响进行了讨论,解决长期困扰制鞋行业和胶粘剂生产厂家并造成环境污染的“三苯”毒害问题。 相似文献
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J.R. Fowler 《Materials & Design》1982,3(6):602-607
The requirement for high temperature adhesives in the aero engine industry is assessed and the reasons for the choice of polyimide adhesives as prime candidates are discussed. Cure chemistry of these resins is describe and the recent development of polyimides that cure by addition mechanisms is reviewed. Currently available adhesives are listed and two typical formulations (FM34 and A7F) are discussed in more detail giving some “as cured” and “thermally aged” properties. The necessity for the provision of special accessory materials and curing facilities in order to process these adhesives at the required temperatures is explained. 相似文献