The amino poly-siloxane was modified with self-made polyether silicones by the crafts of emulsion polymerization. We studied the emulsifier, the dosage of emulsifier initiator, polyether/silane coupling agent, pH valu...The amino poly-siloxane was modified with self-made polyether silicones by the crafts of emulsion polymerization. We studied the emulsifier, the dosage of emulsifier initiator, polyether/silane coupling agent, pH value. There are some results of the research indicated in the following. First, there are many factors for the hydrophilic amino-silicone softener both on the polymerization process and the performance, such as the proportion and amount of emulsifier, initiator dosage, the mass ratio of the polyether and hydrogen silicone oil, the choice of silicone coupling agent, and the ratio and dosage of polyether silicones silane coupling agent. Second, the amount of hydrogen of the hydrogen silicones and the choice of catalyst are the key points on the synthesis of polyether silicones. The amount of hydrogen should be low and the catalyst must be economical and efficient and its introduction should be small and times, other more the holding time is not too long. The next one is that, in the process of hydrolysis of silane coupling agent, we need some acid to adjust pH value, or they will be broken down. The most important one but not the last is that the epoxy group can improve the products low-temperature supple and the persistence of the finishing fabric, furthermore it can reduce yellowing and has a good stability of the inorganic salt, however, it will be destroyed if the reaction temperature for epoxy is too high. What’s more, it is very economical and environmental that the process of emulsion is simple and with less emulsifier.展开更多
The main purpose of this research work is to improve anti-static properties of Cashmere fabric by introducing application comprising anti-static agent by foaming which was made with cationic waterborne polyurethane an...The main purpose of this research work is to improve anti-static properties of Cashmere fabric by introducing application comprising anti-static agent by foaming which was made with cationic waterborne polyurethane and graphene-CNC. Cashmere fabric was cut into 10 pieces of sample cloth of 5 cm * 5 cm size, washed with acetone solution, and then dried in an oven at 60℃. Three forms of waterborne polyurethanes such as two forms of Cationic waterborne polyurethane (CWPU) and a form of Anionic waterborne polyurethane (AWPU) were synthesized. Cellulose nanocrystalline (CNC)/graphite powder solution with the ratio of 0.5/1, 1/1, 2/1 was prepared by ultrasonic probe stripping method, and the concentration of graphite powder was ensured to be 1 mg/ml. The fabric was treated with anionic and cationic WPUs foaming solution until the weight gain reached 2.5 - 3.5 wt%. After drying, the elastic cloth was foamed with graphene solution until the graphite content of the cloth was close to 10%, 20%, 40%, 60% respectively, and then dried for reserving. Characterization properties of pure graphite powder, pure CNC and graphene solution with different proportions of three components were tested by Fourier transform infrared spectrometer (FTIR), X-ray diffraction (XRD), Thermalgravitimetric analysis (TGA) and scanning electron microscopy (SEM). Take the original cloth, only WPU treated cloth and four clothes with different graphite content for the fabric performance test.展开更多
合理利用节点的能量异构特性延长网络生命周期是异构无线传感器网络(HWSN,heterogeneous wireless sensor network)的主要目标之一。因此,根据节点能量的异构性提出了一种基于模拟退火(SA,simulated annealing)算法和改进灰狼优化器(GWO...合理利用节点的能量异构特性延长网络生命周期是异构无线传感器网络(HWSN,heterogeneous wireless sensor network)的主要目标之一。因此,根据节点能量的异构性提出了一种基于模拟退火(SA,simulated annealing)算法和改进灰狼优化器(GWO,grey wolf optimizer)的HWSN路由协议SA-MGWO(SA-modified grey wolf optimizer)。首先,该协议通过为能量异构的节点定义不同的适应度函数进行初始簇的选取;然后计算节点的适应值,并将其视为灰狼优化器中的初始权重;同时,根据狼群与猎物的距离以及系数向量对权重进行动态更新,提高灰狼优化器的寻优能力;最后,利用模拟退火算法保证异构网络中最优簇集的选取。仿真结果表明,相比于SEP(stable election protocol)、分布式能量有效成簇(DEEC,distribute energy efficient clustering)、M-SEP及FIGWO(fitness value based improved grey wolf optimizer)协议,SA-MGWO协议的网络生命周期分别提高了53.1%、31.9%、46.5%和27.0%。展开更多
文摘The amino poly-siloxane was modified with self-made polyether silicones by the crafts of emulsion polymerization. We studied the emulsifier, the dosage of emulsifier initiator, polyether/silane coupling agent, pH value. There are some results of the research indicated in the following. First, there are many factors for the hydrophilic amino-silicone softener both on the polymerization process and the performance, such as the proportion and amount of emulsifier, initiator dosage, the mass ratio of the polyether and hydrogen silicone oil, the choice of silicone coupling agent, and the ratio and dosage of polyether silicones silane coupling agent. Second, the amount of hydrogen of the hydrogen silicones and the choice of catalyst are the key points on the synthesis of polyether silicones. The amount of hydrogen should be low and the catalyst must be economical and efficient and its introduction should be small and times, other more the holding time is not too long. The next one is that, in the process of hydrolysis of silane coupling agent, we need some acid to adjust pH value, or they will be broken down. The most important one but not the last is that the epoxy group can improve the products low-temperature supple and the persistence of the finishing fabric, furthermore it can reduce yellowing and has a good stability of the inorganic salt, however, it will be destroyed if the reaction temperature for epoxy is too high. What’s more, it is very economical and environmental that the process of emulsion is simple and with less emulsifier.
文摘The main purpose of this research work is to improve anti-static properties of Cashmere fabric by introducing application comprising anti-static agent by foaming which was made with cationic waterborne polyurethane and graphene-CNC. Cashmere fabric was cut into 10 pieces of sample cloth of 5 cm * 5 cm size, washed with acetone solution, and then dried in an oven at 60℃. Three forms of waterborne polyurethanes such as two forms of Cationic waterborne polyurethane (CWPU) and a form of Anionic waterborne polyurethane (AWPU) were synthesized. Cellulose nanocrystalline (CNC)/graphite powder solution with the ratio of 0.5/1, 1/1, 2/1 was prepared by ultrasonic probe stripping method, and the concentration of graphite powder was ensured to be 1 mg/ml. The fabric was treated with anionic and cationic WPUs foaming solution until the weight gain reached 2.5 - 3.5 wt%. After drying, the elastic cloth was foamed with graphene solution until the graphite content of the cloth was close to 10%, 20%, 40%, 60% respectively, and then dried for reserving. Characterization properties of pure graphite powder, pure CNC and graphene solution with different proportions of three components were tested by Fourier transform infrared spectrometer (FTIR), X-ray diffraction (XRD), Thermalgravitimetric analysis (TGA) and scanning electron microscopy (SEM). Take the original cloth, only WPU treated cloth and four clothes with different graphite content for the fabric performance test.
文摘合理利用节点的能量异构特性延长网络生命周期是异构无线传感器网络(HWSN,heterogeneous wireless sensor network)的主要目标之一。因此,根据节点能量的异构性提出了一种基于模拟退火(SA,simulated annealing)算法和改进灰狼优化器(GWO,grey wolf optimizer)的HWSN路由协议SA-MGWO(SA-modified grey wolf optimizer)。首先,该协议通过为能量异构的节点定义不同的适应度函数进行初始簇的选取;然后计算节点的适应值,并将其视为灰狼优化器中的初始权重;同时,根据狼群与猎物的距离以及系数向量对权重进行动态更新,提高灰狼优化器的寻优能力;最后,利用模拟退火算法保证异构网络中最优簇集的选取。仿真结果表明,相比于SEP(stable election protocol)、分布式能量有效成簇(DEEC,distribute energy efficient clustering)、M-SEP及FIGWO(fitness value based improved grey wolf optimizer)协议,SA-MGWO协议的网络生命周期分别提高了53.1%、31.9%、46.5%和27.0%。
