Ma cationic surfactants makamaka ndi ma organic amine okhala ndi nayitrogeni. Popeza atomu ya nayitrogeni m'mamolekyu awo ili ndi ma elekitironi awiriawiri, imatha kuphatikizana ndi hydrogen m'mamolekyu a asidi kudzera mu ma bond a hydrogen, zomwe zimapangitsa kuti gulu la amino likhale ndi mphamvu yabwino. Chifukwa chake, amangowonetsa ntchito yabwino pamwamba pa acidic media; mu alkaline media, nthawi zambiri amataya ntchito yawo pamwamba. Kuwonjezera pa ma cationic surfactants okhala ndi nayitrogeni, palinso gawo laling'ono la ma cationic surfactants okhala ndi zinthu monga sulfure, phosphorous, ndi arsenic.
1. Mkhalidwe wa chitukuko
Ma cationic surfactants sanagwiritsidwe ntchito kwambiri m'mafakitale kwa nthawi yayitali, ndipo kufunikira kwawo kwakhala kukukulirakulira chaka ndi chaka. Komabe, chifukwa ntchito zawo zazikulu zimagwiritsidwa ntchito mwapadera monga fungicides, fiber softeners, ndi antistatic agents, kugwiritsidwa ntchito kwawo ndi kochepa poyerekeza ndi ma anionic ndi non-ionic surfactants.
Ma cationic surfactants nthawi zambiri amakhala ndi zinthu zabwino monga emulsification, wetting, washing, sterilization, softening, antistatic, and anti-corrosion. Chifukwa cha zinthu zawo zapadera komanso ntchito zawo, ali ndi kuthekera kwabwino kopanga zinthu. Pamene ntchito zamafakitale ndi za boma zikupitilira kukula, mitundu yawo ndi kufunikira kwawo kudzapitirira kukula.
2. Kugawa magulu
Ma surfactants ambiri a cationic omwe ali ndi phindu la malonda ndi ochokera ku organic nitrogen compounds, komwe positive charge imayendetsedwa ndi ma atomu a nayitrogeni. Palinso mitundu ina yatsopano ya ma surfactants a cationic komwe positive charge imayendetsedwa ndi ma atomu monga phosphorous, sulfure, ayodini, ndi arsenic. Malinga ndi kapangidwe ka mankhwala a ma surfactants a cationic, amatha kugawidwa m'magulu anayi: amine salt type, quaternary ammonium salt type, ndi heterocyclic type.
Ma surfactants a mtundu wa amine salt ndi mawu ofala a mchere wa primary amine, secondary amine salt, ndi tertiary amine salt surfactants. Makhalidwe awo ndi ofanana kwambiri, ndipo zinthu zambiri ndi zosakaniza za ma primary amines ndi ma secondary amines. Mtundu uwu wa surfactant ndi mchere wopangidwa ndi ma fatty amines ndi ma inorganic acids, ndipo umasungunuka kokha mu acidic solutions. Pansi pa mikhalidwe ya alkaline, ma amine salts amakumana mosavuta ndi ma alkalis kuti apange ma free amines, zomwe zimachepetsa kusungunuka kwawo, motero zimalepheretsa kugwiritsidwa ntchito kwawo pamlingo winawake.
Mtundu wa mchere wa ammonium wa Quaternary
Ma cationic surfactants amtundu wa quaternary ammonium salt-type ndi mtundu wofunikira kwambiri wa ma cationic surfactants, okhala ndi makhalidwe ndi njira zokonzekera zosiyana ndi za amine salt-type. Ma surfactants otere amatha kusungunuka mu njira zonse ziwiri za acidic ndi alkaline, ali ndi makhalidwe abwino kwambiri, komanso amagwirizana bwino ndi mitundu ina ya ma surfactants. Chifukwa chake, ali ndi ntchito zambiri.
Hmtundu wa eterocyclic
Mphete za heterocyclic zomwe zili mu mamolekyu a cationic surfactant makamaka zimakhala ndi nayitrogeni monga mphete ya morpholine, mphete ya pyridine, mphete ya imidazole, mphete ya piperazine ndi mphete ya quinoline.
3. Kupanga
Njira yaikulu yopangira ma cationic surfactants ndi N-alkylation reaction. Pakati pawo, njira yomwe ma tertiary amines amachitira ndi ma alkylating agents kuti apange quaternary ammonium salts imatchedwanso quaternization reaction.
Mchere wa Alkyl quaternary ammonium
Mchere wa alkyl quaternary ammonium ndi umodzi mwa mitundu yofunika kwambiri ya ma surfactants a cationic a quaternary ammonium salt-type, ndipo akhala akugwiritsidwa ntchito kwambiri ngati fungicides, fiber softeners, mineral flotation agents, emulsifiers, ndi zina zotero. Kapangidwe kawo ndi kakuti atomu ya nayitrogeni imalumikizidwa ndi magulu anayi a alkyl, ndiko kuti, ma atomu onse anayi a hydrogen a ammonium ion amalowedwa m'malo ndi magulu a alkyl. Nthawi zambiri, gulu limodzi kapena awiri okha mwa magulu a alkyl awa ndi magulu a alkyl a hydrocarbon alkyl along-chain, ndipo magulu otsala a alkyl ali ndi atomu imodzi kapena ziwiri za carbon. Malinga ndi mawonekedwe awo, pali njira zitatu zopangira mchere wa alkyl quaternary ammonium: wokonzedwa ndi momwe ma alkyl halides apamwamba alili ndi ma amine otsika, wokonzedwa ndi momwe ma alkyl amine apamwamba alili ndi ma alkyl halides otsika, ndipo wokonzedwa ndi njira ya formaldehyde-formic acid.
Mchere wa ammonium wa Quaternary wokhala ndi ma heteroatomu
Mchere wotchedwa quaternary ammonium salts wokhala ndi heteroatoms pano nthawi zambiri umatanthauza mchere wa quaternary ammonium womwe uli ndi heteroatoms monga O, N, ndi S mu unyolo wawo wa hydrophobic hydrocarbon, kutanthauza, ma surfactants omwe ali ndi ma amide bond, ma ether bond, ma ester bond, kapena ma thioether bond m'magulu awo a lipophilic. Popeza gulu la hydrophilic quaternary ammonium cation ndi gulu la alkyl hydrophobic zimalumikizidwa kudzera m'magulu monga amide, ester, ether, kapena thioether m'malo molumikizidwa mwachindunji, anthu ena amanenanso kuti mchere wa quaternary ammonium salts ndi ma surfactants olumikizidwa mwachindunji.
Mchere wa ammonium wa Quaternary wokhala ndi mphete za benzene
Mtundu uwu wa surfactant umagwiritsidwa ntchito makamaka ngati mankhwala ophera mabakiteriya, mankhwala otulutsa thovu, mankhwala onyowetsa, komanso mankhwala okonzera utoto, pakati pa ena. Mu njira yopangira, njira yayikulu yopangira mphete za aromatic ndikugwiritsa ntchito benzyl chloride ngati alkylating reagent kuti igwirizane ndi ma tertiary amines. Benzyl chloride imakonzedwa ndi toluene yomwe imakhudzidwa ndi chlorination. Kuti tipewe chlorination pa mphete ya benzene, izi ziyenera kuchitika mu ketulo ya enamel kapena tower reactor yokhala ndi galasi.
Mchere wa ammonium wa Quaternary wokhala ndi ma heterocycles
Mphete za heterocyclic zomwe zili mu mamolekyu a mchere wa quaternary ammonium ndi makamaka mphete ya morpholine, mphete ya piperazine, mphete ya pyridine, mphete ya quinoline ndi mphete ya imidazole, ndi zina zotero.
Amchere wamtundu wanga
Ma surfactants a cationic a mtundu wa amine salt makamaka amakhala ndi magulu atatu akuluakulu: mchere wautali wa alkyl primary amine salts, mchere wachiwiri wa amine, ndi mchere wachitatu wa amine.
4. Kugwiritsa Ntchito
Ma cationic surfactants amagwira ntchito zabwino monga kuyeretsa, kufewetsa,antistatic, ndi mphamvu zotsutsana ndi dzimbiri, komanso mphamvu zina zosungunula ndi kunyowetsa. Nthawi zambiri amagwiritsidwanso ntchito ngati zoyambitsa kusamutsa magawo. Komabe, mtundu uwu wa surfactant sugwiritsidwa ntchito kawirikawiri ngati sopo. Chifukwa pamwamba pa zinthu zambiri zomwe zili m'madzi, makamaka m'madzi amchere, nthawi zambiri zimakhala ndi mphamvu yoipa. Pakagwiritsidwa ntchito, surfactant yomwe ili ndi mphamvu yokhazikika imayikidwa pamwamba pa zinthu zomwe zili ndi madzi mkati ndi magulu a hydrophilic kunja, zomwe zimapangitsa kuti pamwamba pa zinthuzo pakhale hydrophilic, zomwe sizingathandize kutsuka ndipo zitha kukhala ndi zotsatirapo zoyipa. Kuphatikiza apo, minda yayikulu yogwiritsira ntchito yamtunduwu wa surfactant ndi yosiyana ndi ma surfactants ena, omwe amagwiritsidwa ntchito kuchepetsa kupsinjika kwa pamwamba. M'malo mwake, amagwiritsa ntchito mawonekedwe awo pamagwiritsidwe ena apadera.
Nthawi yotumizira: Marichi-19-2026