| As people pay more and more attention to physical health and the quality of amateur leisure life,the exercise and fitness has been regarded as part of the daily life.However,due to some limitations of clothing,such as non-absorbent sweat making the back feel cold and feel stuffy in hot weather,people feel uncomfortable during exercise and fitness.Therefore,the thermal and wet comfort of the clothing has been paid extensive attention.In recent years,the research and development of multifunctional comfort fabrics has become popular.This paper mainly conducts a research and development based on nano-boron nitride moisture-absorbing and cool fabrics,the main contents are as follows:First of all,the hydrophilic modification of nano-boron nitride(BN)with excellent thermal conductivity is carried out to prepare the hydroxylation modified nano-boron nitride(BNO),which is used as a"cooling agent"for the fabric.First,the hot and humid steam treatment of BN with muffle furnace was carried out,in which the surface modification of BN happened under the synergistic action of wet and heat.A certain number of hydroxyl groups and other groups are produced on the surface of BN,and the hydrophilicity is enhanced.Under aerobic condition,high temperature treatment of BN can weaken the force of BN bond and van der Waals force between the layers of BN.At the same time,the hydrolysis of BN takes place under the action of water vapor.Then the BNO prepared by this method was characterized by infrared spectroscopy,thermogravimetric analysis and X-ray diffraction.Secondly,BNO,hydrophilic agent TF-620H and coupling agent TCA-K238S were used to prepare moisture absorption and cool compound finishing solution.The effects of technological parameters such as TCA-K238S mass fraction,TF-620H mass fraction and ultrasonic treatment time on the stability of finishing fluid were investigated by single factor and orthogonal factor analysis.The optimum processing parameters are obtained as follows:the mass fraction of BNO is1%;the mass fraction of TCA-K238S is 0.5%;the mass fraction of TFA-620H is 2%;and the time of ultrasonic treatment is 30 min.The polydispersity index(PDI)of the compound finishing solution is 268.3 nm and the polydispersity index(PDI)is 0.167,which indicate that the dispersion effect is good.At last,a 90%polyester+10%spandex fabric is used as the original fabric for absorb moisture and cool finishing.After the alkali reduction treatment,the polyester fiber was hydrolyzed to produce hydrophilic groups such as carboxyl group and hydroxyl group,and at the same time,pit appeared on the surface of the fiber,then the fabric after alkli deweighting was finished by immersion-rolling-drying method.Based on the optimum processing parameters of the compound finishing solution,the proper mass fraction of finishing solution,impregnation time,curing temperature and baking time are obtained through the process exploration.Finally,the optimal finishing parameters are obtained:the mass fraction of BNO is 2%;the mass fraction of TF-620H is 4%;the mass fraction of TCA-K238S is 1%;the impregnation time is 5 min;the curing temperature is 140~oC;the curing time is 60 s.The properties of the fabric finished by the best finishing process are tested by means of thermal conductivity instrument,wool effect tester and contact cold sensing tester.The results show that the heat transfer coefficient is 58.03W/(m~2·~oC);the moisture evaporation rate is 0.31 g/(cm~2·s);the wicking height is 16.5 cm and the maximum transient heat flux is 0.139 J/(cm~2·s).Compared with the original fabric,its thermal conductivity and moisture absorption performance have been greatly improved. |
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