Fachtóirí tionchair maidir le ruaimniú le ruaimeanna díreacha

2021/01/11

Fachtóirí tionchair maidir le ruaimniú leruaimeanna díreacha Ruaimeanna díreachatá cleamhnas ard acu le snáithíní ceallalóis agus is féidir iad a dhathú i meáin alcaileach neodracha nó laga. De ghnáth déantar snáithíní próitéine ruaimnithe i meán aigéad neodrach nó lag.

Ruaimeanna díreachaatá an-íogair d'aigéad, má chuirtear aigéad leis is féidir é a dhéanamh deasctha. Tar éis ruaimniú díreach, má dhéileáiltear leis le gníomhaire socraithe, aigéad orgánach, srl., Is féidir an gasta a fheabhsú.


Glacann an snáithín an ruaim leis an dromchla sa tuaslagán, agus ansin déanann sé idirleathadh go leanúnach go dtí limistéar éagruthach an tsnáithín, ag foirmiú banna hidrigine agus teaglaim de fhórsa van der Waals leis an macramóilín snáithín. I measc a ruaimeanna díorthaithe tá ruaimeanna díreacha éadroma agus ruaimeanna díreach salann copair. Fachtóirí éagsúla deruaimniú díreach(1) Tionchar na teochta arruaimniú ruaim dhíreach: natural pigments are greatly affected by temperature. For example, beet red is unstable above 60℃, so dyeing should not be carried out at high temperature. Factors affecting dyeing with environmentally friendly ruaimeanna díreacha (2) The influence of the pH value of the dyeing bath: Only by controlling the dyeing bath to dye under proper pH conditions can a higher equilibrium adsorption capacity be obtained. For example, Betarubin is unstable under alkaline conditions, so dyeing should be carried out under acidic conditions. One COO- in the pigment molecule can be combined with -H3N+ on the wool as a salt bond. The lower the pH of the dye bath, the more positive charges the wool has, the faster the dyeing rate and the higher the dye exhaustion rate. (3) The role of dispersant and stabilizer: some natural pigments are unstable and easy to change color, and stabilizers need to be added. Most natural dyes have relatively large relative molecular weights, which tend to reunite and hinder dyeing. However, anionic or non-ionic surfactants can be used to disperse the dye particles in the dye liquor to form a more stable dispersion system, which will increase the chance of contact between the fabric and the dye and increase the dyeing speed. The lower the water solubility of the dye, the more obvious the effect of dyeing with dispersant.