Tsiku Lotumiza: 24 Apr, 2023
Sodium lignosulfonatendi polima zachilengedwe. Ndizopangidwa kuchokera ku zamkati, zomwe ndi polima wa 4-hydroxy-3-methoxybenzene. Ili ndi dispersibility amphamvu. Chifukwa cha kulemera kwa maselo osiyanasiyana ndi magulu ogwira ntchito, ali ndi magawo osiyanasiyana a dispersibility. Ndi pamwamba yogwira mankhwala kuti akhoza adsorbed padziko osiyanasiyana olimba particles ndipo akhoza kuchita zitsulo ayoni kuwombola. Ilinso ndi magulu osiyanasiyana omwe amagwira ntchito pamapangidwe ake, kotero imatha kupanga condensation kapena hydrogen bonding ndi mankhwala ena.
Chifukwa cha kapangidwe kake kapadera,sodium lignosulfonateali pamwamba physicochemical katundu monga kubalalitsidwa, emulsification, solubilization ndi adsorption. Zogulitsa zake zosinthidwa zimagwiritsidwa ntchito ngati mchere wa mineral surfactant, ndipo kupanga kwake kwakhala kokhwima.

Ntchito mfundo yasodium lignosulfonate:
Chiwerengero cha maunyolo a carbon chimasiyana kwambiri malinga ndi zinthu zosiyanasiyana zotengedwa ku lignin. Zina ndizoyenera kupanga feteleza ndipo zina ndizoyenera kuwonjezera mankhwala ophera tizilombo. Lili ndi ntchito zosiyanasiyana zogwira ntchito, dispersibility ndi chelation, zomwe zimakhala zosavuta kuphatikiza ndi zinthu zachitsulo kuti zipange chelate state, kupititsa patsogolo thupi ndi mankhwala azitsulo zachitsulo, kusunga ndalama ndikuwongolera bwino. Ma adsorption ndi kutulutsa pang'onopang'ono kwa lignin kumatha kukhalabe ndi mphamvu ya feteleza wamankhwala ndikupangitsa kuti amasulidwe pang'onopang'ono. Ndi chinthu chabwino chomwe chimatulutsidwa pang'onopang'ono cha feteleza wa organic. Lignin ndi mtundu wa polycyclic macromolecular organic pawiri yomwe ili ndi magulu ambiri oyipa, omwe ali ndi mgwirizano wamphamvu wa ayoni achitsulo apamwamba kwambiri m'nthaka.
Sodium lignosulfonateangagwiritsidwenso ntchito pokonza mankhwala. Lignin ili ndi malo akuluakulu enieni ndipo imakhala ndi magulu osiyanasiyana ogwira ntchito, omwe angagwiritsidwe ntchito ngati mankhwala ochepetsa kutulutsa mankhwala.
Pali kusiyana pakati pa lignin mu zomera ndi lignin pambuyo pa kulekana. Khoma lomwe langopangidwa kumene la ma cell cell ndioonda komanso olemera mu ma polysaccharides acidic monga pectin, omwe pang'onopang'ono amapanga cellulose ndi hemicellulose. Maselo amasiyanitsidwa m'maselo apadera a xylem (ulusi wamatabwa, ma tracheids ndi ziwiya, etc.). Pamene gawo la S1 la khoma lachiwiri likupangidwa, lignin imayamba kupanga kuchokera kumakona a khoma loyamba. Chodabwitsa ichi nthawi zambiri chimatchedwa lignification. Ndi kukula kwa minofu ya zomera, lignification imakula kupita ku intercellular wosanjikiza, khoma loyamba ndi khoma lachiwiri. Lignin imayikidwa pang'onopang'ono mkati ndi pakati pa makoma a selo, kumanga maselo ndi maselo pamodzi. Panthawi ya lignification ya makoma a cell cell, lignin imalowa m'makoma a cell, kukulitsa kuuma kwa makoma a cell, kulimbikitsa mapangidwe a minofu yamakina, kukulitsa mphamvu zamakina ndi kunyamula katundu wa maselo a zomera ndi minyewa; Lignin imapangitsa kuti khoma la cell likhale hydrophobic ndipo limapangitsa kuti maselo a zomera asawonongeke, kupereka chitsimikizo chodalirika choyendetsa mtunda wautali wa madzi, mchere ndi zinthu zamoyo mu thupi la zomera; Kulowetsedwa kwa lignin mu khoma la cell kumapanganso chotchinga chakuthupi, kuteteza bwino kuukira kwa tizilombo toyambitsa matenda osiyanasiyana; Zimalepheretsa ma conduction mamolekyu a mu xylem kuti asatulutse madzi, ndipo nthawi yomweyo amathandizira kuti mbewu zapadziko lapansi zizitha kukhala ndi moyo pamalo owuma, zomwe zimapangitsa kuti chomeracho chisathe kudwala. Lignin imagwira ntchito yomanga mapadi, hemicellulose ndi mchere wa inorganic (makamaka silicate) muzomera.
Zomwe zimakhudza kuwonongeka kwa lignin ndi pH ya nthaka, chinyezi ndi nyengo. Zinthu zina, monga kupezeka kwa nayitrogeni ndi mchere wa nthaka, zimagwiranso ntchito. Kutsatsa kwa Fe ndi Al oxides pa lignin kumatha kuchepetsa kuwonongeka kwa lignin.