The technical zviratidzo zvepolyacrylamidekazhinji mamorekuru huremu, hydrolysis degree, ionic degree, viscosity, zvakasara monomer zvemukati, saka tongai mhando yePAM inogonawo kutongwa kubva kune izvi zviratidzo!
01Molecular Weight
Iyo molecular uremu hwePAM yakakwirira kwazvo uye yakagadziridzwa zvakanyanya mumakore achangopfuura.PAM, iyo yakashandiswa muma1970, yakanga ine huremu hwema molecular emamiriyoni.Kubva kuma1980, huremu hwemamorekuru hwePAM hwainyanya kushanda hwaive hunopfuura mamirioni gumi nemashanu, uye mamwe akasvika mamirioni makumi maviri."Imwe neaya mamorekuru ePAM ane polymerized kubva kune anopfuura zviuru zana eacrylamide kana sodium acrylate mamorekuru (acrylamide ine huremu hwe71, uye PAM ine zana rezviuru zvemonomeri ine huremu hwemamorekuru 7.1 miriyoni)."
Kazhinji, PAM ine huremu hwepamusoro hwema molecular ine flocching performance iri nani, ine molecular huremu hwe71 ye acrylamide uye 7.1 miriyoni yePAM ine 100,000 monomers.Huremu hwepolyacrylamide uye zvinobva kumazana ezviuru kusvika kune anopfuura miriyoni gumi, zvichienderana nehuremu hwemamorekuru hunogona kukamurwa kuita huremu hwakaderera (pasi pemirioni imwe), huremu hwepakati (1 miriyoni kusvika 10 miriyoni), huremu hwemamorekuru. (10 mamiriyoni kusvika 15 mamiriyoni), super molecular uremu (kupfuura mamiriyoni 15).
Huremu hwemamorekuru hwemacromolecular organic matter, kunyangwe muchigadzirwa chimwe chete hahuna yunifomu, iyo inonzi molecular uremu ndiyo avhareji yayo.
02Dhigirii re hydrolysis uye degree reion
Iyo ionic degree yePAM ine simba guru pakushandiswa kwayo, asi kukosha kwayo kwakakodzera kunoenderana nerudzi uye hunhu hwezvinhu zvakabatwa, pachava neakasiyana maitiro akanaka pasi pemamiriro akasiyana.Kana iyo ionic simba yezvinhu zvakarapwa yakakwirira (ine yakawanda inorganic substances), ionic degree yePAM inofanira kuva yakakwirira, pane zvinopesana, inofanira kunge yakaderera.Kazhinji, dhigirii yeanion inonzi dhigirii re hydrolysis.Uye ionic degree kazhinji inoreva cations.
Iocity =n/(m+n)*100%
Iyo PAM yakagadzirwa mukutanga nhanho yaive polymerized kubva kune monomer ye polyacrylamide, iyo yaive isina iyo -COONA boka.Usati washandiswa, NaOH inofanirwa kuwedzerwa nekudziiswa kuti iite hydrolyze chikamu che -CONH2 boka ku -COONA.Iyo equation ndeiyi inotevera:
-CONH2 + NaOH → -COONA + NH3↑
Ammonia gasi inoburitswa panguva yehydrolysis.Chikamu cheamide boka hydrolysis muPAM inonzi dhigirii re hydrolysis yePAM, inova dhigirii reanion.Kushandiswa kwemhando iyi yePAM hakuna kunaka, uye kushanda kwacho kwakashata (kupisa hydrolysis kuchaita kuti molecular uremu uye kushanda kwePAM kuderera zvakanyanya), haisati yashandiswa kubva kuma1980s.
Kugadzirwa kwemazuva ano kwePAM kune zvakasiyana-siyana zvakasiyana-siyana zveanion dhigirii zvigadzirwa, mushandisi anogona maererano nezvinodiwa uye kuburikidza nemuedzo chaiwo kusarudza zvakasiyana-siyana zvakakodzera, hazvidi kuti hydrolysis, mushure mekuparara kunogona kushandiswa.Nekudaro, nekuda kwezvikonzero zvekujairira, vamwe vanhu vachiri kutaura nezve kunyungudika kweiyo flocculants se hydrolysis.Izvo zvinofanirwa kucherechedzwa kuti zvinoreva hydrolysis ndiko kuora kwemvura, inova kemikari kuita.Iyo hydrolysis yePAM ine ammonia gasi yakaburitswa;Dissolution inongova chiito chemuviri, hapana maitiro emakemikari.Izvo zviviri zvakasiyana zvakanyanya uye hazvifanirwe kuvhiringika.
03Residual monomer content
Iyo yasara monomer yemukati yePAM inoreva izvo zvirimoacrylamide monomermu acrylamide polymerization mu polyacrylamide mukuita kwekusakwana kuita uye pakupedzisira inosara mune acrylamide zvigadzirwa.Iyo yakakosha parameter kuyera kana yakakodzera indasitiri yechikafu.Polyacrylamide haina chepfu, asi acrylamide ine muchetura.Muindasitiri yepolyacrylamide, zvakaoma kudzivirira kusara kweiyo unpolymerized acrylamide monomer.Naizvozvo, izvo zvirimo zvakasara monomer mukatiPAM zvigadzirwainofanira kunyatsodzorwa.Huwandu hweinosara monomer muPAM inoshandiswa mumvura yekunwa uye indasitiri yechikafu haitenderwe kudarika 0.05% pasirese.Kukosha kwezvinhu zvakakurumbira zvekunze zvakaderera pane 0.03%.
04viscosity
PAM mhinduro ine viscous zvakanyanya.Iyo yakakwirira iyo molecular uremu hwePAM, iyo yakakura viscosity yemhinduro.Izvi zvinodaro nekuti PAM macromolecules akareba, macheni akatetepa ane kuramba kukuru kufamba kuburikidza nemhinduro.Izvo zvakakosha zve viscosity kuratidza hukuru hwesimba rekukwenya mune mhinduro, inozivikanwawo seyemukati friction coefficient.Iyo viscosity yemhinduro yemarudzi ese epolymer organic matter yakakwira uye inowedzera nekuwedzera kwehuremu hwema molecular.Nzira yekuona huremu hwemamorekuru epolymer organic matter, ndeyekuona viscosity yeimwe denderedzwa remhinduro pasi pemamwe mamiriro, uyezve maererano neimwe fomula kuverengera huremu hwayo, inozivikanwa se "viscose average molecular weight".
Nguva yekutumira: Jan-12-2023