Lipontšo tsa tekheniki tsapolyacrylamideka kakaretso ke boima ba limolek'hule, degree ea hydrolysis, degree ea ionic, viscosity, mesaletsa ea monomer content, kahoo ahlola boleng ba PAM le bona ba ka ahloloa ho tsoa ho matšoao ana!
01Boima ba Molek'hule
Boima ba molek'hule ba PAM bo phahame haholo 'me bo ntlafalitsoe haholo lilemong tsa morao tjena.PAM, e neng e sebelisoa lilemong tsa bo-1970, e ne e e-na le boima ba limolek'hule ba limilione. Ho tloha lilemong tsa bo-1980, boima ba limolek'hule tsa PAM e sebetsang hantle haholo bo ne bo feta limilione tse 15, 'me tse ling li fihlile ho limilione tse 20. E 'ngoe le e 'ngoe ea limolek'hule tsena tsa PAM e entsoe polymer ho tsoa ho limolek'hule tse fetang likete tse lekholo tsa acrylamide kapa sodium acrylate (acrylamide e na le boima ba limolek'hule tse 71, 'me PAM e nang le li-monomer tse likete tse lekholo e na le boima ba limolek'hule tse limilione tse 7,1).
Ka kakaretso, PAM e nang le boima bo phahameng ba molek'hule e na le ts'ebetso e ntle ea ho phalla, e nang le boima ba molek'hule ea 71 bakeng sa acrylamide le limilione tse 7.1 bakeng sa PAM e nang le 100,000 monomers. Boima ba limolek'hule tsa polyacrylamide le lihlahisoa tsa eona ho tloha ho ba likete tse makholo ho ea ho tse fetang limilione tse 10, ho ea ka boima ba limolek'hule bo ka aroloa ka boima bo tlaase ba limolek'hule (ka tlase ho limilione tse 1), boima bo bohareng ba limolek'hule (1 milione ho ea ho limilione tse 10), boima bo phahameng ba limolek'hule. (limilione tse 10 ho isa ho tse 15), boima ba limolek'hule (tse fetang limilione tse 15).
Boima ba limolek'hule tsa macromolecular organic matter, esita le sehlahisoa se le seng ha se tšoane ka ho feletseng, boima ba limolek'hule bo tloaelehileng ke karolelano ea eona.
02Tekanyo ea hydrolysis le tekanyo ea ion
Tekanyo ea ionic ea PAM e na le tšusumetso e kholo ho phello ea eona ea tšebeliso, empa boleng ba eona bo nepahetseng bo itšetlehile ka mofuta le mofuta oa thepa e tšoaroang, ho tla ba le litekanyetso tse fapaneng tse nepahetseng tlas'a maemo a fapaneng. Haeba matla a ionic a thepa e tšoaroang a phahame (e nang le lintho tse ngata tse sa tloaelehang), tekanyo ea ionic ea PAM e lokela ho ba e phahameng, ho fapana le hoo, e lokela ho ba tlaase. Ka kakaretso, tekanyo ea anion e bitsoa tekanyo ea hydrolysis. Mme degree ea ionic hangata e bua ka cations.
Iocity =n/(m+n)*100%
PAM e hlahisitsoeng qalong e ne e entsoe ka polymerized ho tloha monomer ea polyacrylamide, e neng e se na sehlopha sa -COONA. Pele o sebelisoa, NaOH e lokela ho eketsoa le ho futhumatsoa ho hydrolyze karolo ea -CONH2 sehlopha ho -COONA. Equation ke e latelang:
-CONH2 + NaOH → -COONA + NH3↑
Khase ea ammonia e lokolloa nakong ea hydrolysis. Karolo ea sehlopha sa amide hydrolysis ho PAM e bitsoa tekanyo ea hydrolysis ea PAM, e leng tekanyo ea anion. Tšebeliso ea mofuta ona oa PAM ha e bonolo, 'me ts'ebetso e fokola (ho futhumatsa hydrolysis ho tla etsa hore boima ba molek'hule le ts'ebetso ea PAM e fokotsehe haholo), ha e e-s'o sebelisoe ka seoelo ho tloha lilemong tsa bo-1980.
Tlhahiso ea morao-rao ea PAM e na le lihlahisoa tse sa tšoaneng tse fapaneng tsa li-anion degree, mosebedisi a ka khona ho ea ka tlhokahalo le ka teko ea sebele ho khetha mefuta e sa tšoaneng e nepahetseng, ha ho hlokahale hore hydrolysis e sebelisoe, ka mor'a hore ho qhibilihe ho sebelisoe.Leha ho le joalo, ka mabaka a tloaelo, batho ba bang ba ntse ba bua ka mokhoa oa ho qhibiliha ha li-flocculants e le hydrolysis. Re lokela ho hlokomela hore moelelo oa hydrolysis ke ho senyeha ha metsi, e leng karabelo ea lik'hemik'hale. Hydrolysis ea PAM e na le khase ea ammonia e lokolloa; Ho qhalana ke ketso ea 'mele feela, ha ho na karabelo ea lik'hemik'hale. Tse peli li fapane haholo 'me ha lia lokela ho ferekanngoa.
03Likahare tse setseng tsa monomer
Litaba tse setseng tsa monomer tsa PAM li bua ka litaba tsaacrylamide monomaka acrylamide polymerization ka polyacrylamide ka tshebetso ya karabelo e sa fellang 'me qetellong masala ka lihlahisoa acrylamide. Ke parameter ea bohlokoa ho lekanya hore na e loketse indasteri ea lijo. Polyacrylamide ha e na chefo, empa acrylamide e na le chefo e itseng. Ho polyacrylamide ea indasteri, ho thata ho qoba mesaletsa ea acrylamide monomer e sa lekanyetsoang. Ka hona, litaba tsa masala monomer kaLihlahisoa tsa PAMe tlameha ho laoloa ka thata. Palo ea monomer e setseng ho PAM e sebelisoang indastering ea metsi a nooang le lijo ha e lumelloe ho feta 0.05% machabeng. Boleng ba lihlahisoa tse tummeng tsa kantle ho naha bo tlase ho feta 0.03%.
04viscosity
Tharollo ea PAM e na le viscous haholo. Ha boima ba molek'hule ba PAM bo phahame, ho na le viscosity e kholo ea tharollo. Sena ke hobane li-macromolecules tsa PAM ke liketane tse telele, tse tšesaane tse nang le khanyetso e kholo ea ho tsamaea ka tharollo. Moko oa viscosity ke ho bonahatsa boholo ba matla a khohlano tharollong, e tsejoang hape e le coefficient ea ka hare ea khohlano. The viscosity ea tharollo ea mefuta eohle ea polymer organic matter e phahame 'me e eketseha ka ho eketseha ha boima ba limolek'hule. Mokhoa oa ho fumana boima ba limolek'hule tsa polymer organic matter, ke ho fumana hore na viscosity ea motsoako o itseng oa tharollo tlas'a maemo a itseng, ebe ho latela mokhoa o itseng oa ho bala boima ba molek'hule, e tsejoang e le "viscose average weight weight".
Nako ea poso: Jan-12-2023