Location:Home>News > Domestic dynamics > Text

The role of nano titanium dioxide in warp sizing mechanism

放大字体  缩小字体 Published date:2016-05-24 13:55:10   views:
Core tip:In order to improve the sizing performance of starch, reducing the amount of PVA size, can add nano titanium dioxide in starch slurry (with vitamin k - T25F) By scanning electron microscope, atomi
In order to improve the sizing performance of starch, reducing the amount of PVA size, can add nano titanium dioxide in starch slurry (with vitamin k - T25F). By scanning electron microscope, atomic force microscope and Fourier transform attenuated total reflection infrared spectroscopy for the mechanism of action of nanoscale inorganic slurry additive was studied. The results showed that the nano titanium dioxide (with vitamin k - T25F) can significantly improve the surface of starch size film and broken lie section and sizing surface smoothness and uniformity; Nanometer titanium dioxide (with vitamin k - T25F) and starch between strong hydrogen bonding interaction, this effect may be related to nano titanium dioxide (with vitamin k - T25F) abundant hydroxyl groups on surface.

Nano titanium dioxide (with vitamin k - T25F) can in some pure cotton fabric all replace PVA size in warp sizing, in polyester and cotton fabric part replace PVA size in warp sizing of this kind of slurry additive has caused extensive concern of the sizing agent and sizing enterprises. Nano titanium dioxide (with vitamin k - T25F) will not react with starch, the starch viscosity and serum viscosity thermal stability no fundamental difference, can to a certain extent, improve the modified starch slurry for pure cotton and polyester/cotton roving, adhesion of starch size film performance also has a certain degree of improvement. In this paper, by scanning electron microscope (SEM), atomic force microscope (AFM) and Fourier transform attenuated total reflection infrared spectroscopy (F 'F - IR ATR) further study the nano titanium dioxide (with vitamin k - T25F) to improve the mechanism of action of sizing performance between the starch slurry.

Pure denatured starch size film had a very strong in the 3351.46 cmI1 O - H stretching vibration peak, nano titanium dioxide: when the mass fraction of 1.5%, GaiFeng move towards the low wave number, to 3344.71 cm, moved seven wave Numbers. When nano titanium dioxide mass fraction is 2%, GaiFeng a number to the takanami direction again three wave number, and moved to 347.45 3 cm, but compared with the peak position of pure starch size film, wave number or reduce the 4 cm. That means nanoparticles surface is rich in hydroxyl (OH) and does exist strong hydrogen bonds between starch, make GaiFeng move towards the low wave number, but in the nanometer titanium dioxide (with vitamin k - T25F) dispersion content is higher, the peak position and mobile is not obvious, suggesting that nanoparticles increased may be hydrogen bonding interaction between starch and weakened.

另外,纯淀粉浆膜在1 019.33 cm 处有一很强的.c—O伸缩振动峰,纳米二氧化钛(同VK-T25F)质量分数为1.5%时该峰仍然在1 019.33 cm 处,没有任何移动,而纳米二氧化钛质量分数为2% 时该峰移至1 017.07 cm" 处,有2个波数的移动。这也说明纳米粒子和淀粉之间存在着相互作用使该峰向低波数方向移动。 从上述现象,可初步认为,在纳米氧化物粒子和淀粉之间、纳米氧化物粒子和棉纤维之间都存在着或强或弱的氢键作用。这些氢键作用可能来自纳米氧化物粒子表面富含的活性羟基(-OH)与棉纤维和淀粉所含羟基之间的结合。纳米氧化物粒子的加入,使上浆棉纤维体系的氢键作用有所加强。纳米氧化物粒子表面羟基与棉纤维羟基的结合,使得在棉纤维之间产生类似“焊点”的作用,从而增加了棉纤维之间的滑移阻力,提高了纱线的强力,此处还可“修复”纤维的临界缺陷点。纳米氧化物粒子表面羟基与淀粉羟基的结合,增加了淀粉分子间的作用力,提高了淀粉浆膜的致密性,从而使淀粉浆膜的断lie强度显著增强。纳米氧化物粒子对淀粉分子的作用还可能与其对淀粉分子链中的树枝状支链起到“梳理”作用,形成类似直链的“假直链”结构有关。

3 conclusion

Nanometer titanium dioxide (vitamin k - T25F) can improve the sizing performance of starch paste. Reduce the dosage of PVA slurry is due to the additive can strengthen the interaction between the molecular chain of starch, uniform film-forming, serous vulnerabilities to reduce; Make starch size film smooth surface wear resistance increase; Also can improve the effect of starch slurry coating of yarn. In addition may also and nanometer titanium dioxide (vitamin k - T25F) surface is rich in active hydroxyl, and starch and between the hydroxyl on the cotton fiber is related to the hydrogen bonding interaction or strong or weak

 
Keywords: The role of nano titanium
 
[ Favorite ]  [ print ]  [ Close ]

 

 
Recommended Domestic dynamics
Click ranking