Zithini iimpawu ze-carboxymethyl cellulose?

Zithini iimpawu ze-carboxymethyl cellulose?

Impendulo:I-Carboxymethyl celluloseikwanazo neempawu ezahlukeneyo ngenxa yamanqanaba ayo ahlukeneyo okutshintshwa. Iqondo lokutshintshwa, elaziwa ngokuba liqondo lokufakelwa kwe-ether, lithetha inani eliqhelekileyo le-H kumaqela amathathu e-OH hydroxyl athatyathelwe indawo yi-CH2COONa. Xa amaqela amathathu e-hydroxyl kwisangqa esisekelwe kwi-cellulose ene-0.4 H kwiqela le-hydroxyl elithatyathelwe indawo yi-carboxymethyl, inokunyibilika emanzini. Ngeli xesha, ibizwa ngokuba yi-0.4 substitution degree okanye i-medium substitution degree (substitution degree 0.4-1.2).

Iimpawu ze-carboxymethyl cellulose:

(1) Yimpuphu emhlophe (okanye iinkozo ezirhabaxa, inemicu), ayinancasa, ayinabungozi, inyibilika lula emanzini, kwaye yenza imo ecacileyo enamathelayo, kwaye isisombululo asithathi cala okanye sine-alkaline kancinci. Inamandla okusasazeka kakuhle kunye namandla okubopha.

(2) Isisombululo sayo samanzi singasetyenziswa njenge-emulsifier yohlobo lweoyile/lwamanzi kunye nohlobo lwamanzi/lweoyile. Ikwanayo nokukwazi ukuxuba ioyile kunye newax, kwaye yi-emulsifier enamandla.

(3) Xa isisombululo sidibana neetyuwa zesinyithi ezinzima ezifana ne-lead acetate, i-ferric chloride, i-silver nitrate, i-stannous chloride, kunye ne-potassium dichromate, imvula ingenzeka. Nangona kunjalo, ngaphandle kwe-lead acetate, isenokuphinda inyibilike kwisisombululo se-sodium hydroxide, kwaye iiprecipitates ezifana ne-barium, i-iron kunye ne-aluminium zinyibilika lula kwisisombululo se-1% se-ammonium hydroxide.

(4) Xa isisombululo sidibana ne-organic acid kunye ne-inorganic acid solution, imvula ingenzeka. Ngokwembono, xa ixabiso le-pH liyi-2.5, i-turbidity kunye nemvula sele ziqalile. Ke ngoko i-pH 2.5 ingathathwa njengeyona nto ibalulekileyo.

(5) Kwiityuwa ezifana ne-calcium, i-magnesium kunye netyuwa yetafile, akukho mvula iya kubakho, kodwa i-viscosity kufuneka incitshiswe, njengokongeza i-EDTA okanye i-phosphate kunye nezinye izinto ukuthintela oko.

(6) Ubushushu bunempembelelo enkulu kwi-viscosity yesisombululo saso samanzi. I-viscosity iyancipha ngokufanayo xa ubushushu bunyuka, kwaye ngokuchaseneyo. Uzinzo lwe-viscosity yesisombululo samanzi kubushushu begumbi alutshintshi, kodwa i-viscosity inokuncipha kancinci xa ishushu ngaphezu kwama-80°C ixesha elide. Ngokubanzi, xa ubushushu bungadluli kwi-110°C, nokuba ubushushu bugcinwa iiyure ezi-3, buze bupholiswe bufikelele kuma-25°C, i-viscosity isabuyela kwimeko yayo yokuqala; kodwa xa ubushushu bushushu bufikelela kwi-120°C iiyure ezi-2, nangona ubushushu bubuyiselwe, i-viscosity yehla nge-18.9%.

(7) Ixabiso le-pH liya kuba nefuthe elithile kwi-viscosity yesisombululo sayo samanzi. Ngokubanzi, xa i-pH yesisombululo esine-viscosity ephantsi iphambuka kwi-neutral, i-viscosity yayo ayinampembelelo ingako, ngelixa kwisisombululo esine-viscosity ephakathi, ukuba i-pH yayo iphambuka kwi-neutral, i-viscosity iqala ukwehla kancinci kancinci; ukuba i-pH yesisombululo esine-viscosity ephezulu iphambuka kwi-neutral, i-viscosity yayo iya kuncipha. Ukwehla okukhulu.

(8) Iyahambelana nezinye iiglu ezinyibilikayo emanzini, izithambisi kunye neeresini. Umzekelo, iyahambelana neglu yezilwanyana, igum arabic, iglycerin kunye nesitatshi esinyibilikayo. Iyahambelana neglasi yamanzi, i-polyvinyl alcohol, i-urea-formaldehyde resin, i-melamine-formaldehyde resin, njl.njl., kodwa ngomlinganiselo ongaphantsi.

(9) Ifilimu eyenziwe ngokukhanyisa ukukhanya kwe-ultraviolet kangangeeyure ezili-100 ayinayo inguqu okanye ukuqhekeka.

(10) Kukho uluhlu lwe-viscosity ezintathu onokukhetha kuzo ngokwesicelo. Kwi-gypsum, sebenzisa i-viscosity ephakathi (isisombululo samanzi esingu-2% kwi-300-600mPa·s), ukuba ukhetha i-viscosity ephezulu (isisombululo esingu-1% kwi-2000mPa·s okanye ngaphezulu), ungayisebenzisa kwidosi efunekayo ukuba ihliswe ngokufanelekileyo.

(11) Isisombululo sayo samanzi sisebenza njengesithinteli kwi-gypsum.

(12) Iintsholongwane kunye neentsholongwane azinampembelelo icacileyo kwimo yempuphu yayo, kodwa zinempembelelo kwisisombululo sayo samanzi. Emva kokungcola, i-viscosity iya kwehla kwaye kuvela i-mildew. Ukongeza isixa esifanelekileyo sezinto zokugcina kwangaphambili kunokugcina i-viscosity yayo kwaye kuthintele i-mildew ixesha elide. Izinto zokugcina ezikhoyo zezi: I-BIT (1.2-benzisothiazolin-3-one), i-racebendazim, i-thiram, i-chlorothalonil, njl. Isixa sokongeza esibhekisa kwisisombululo samanzi yi-0.05% ukuya kwi-0.1%.

Isebenza kangakanani i-hydroxypropyl methylcellulose njengearhente yokugcina amanzi kwi-anhydrite binder?

Impendulo: I-Hydroxypropyl methylcellulose sisixhobo sokugcina amanzi esisebenza kakuhle kakhulu kwizixhobo ze-gypsum cementitious. Ngokunyuka komxholo we-hydroxypropyl methylcellulose. Ukugcinwa kwamanzi kwezinto ze-gypsum cementiated kuyanda ngokukhawuleza. Xa kungekho sixhobo sokugcina amanzi esongeziweyo, izinga lokugcina amanzi lezinto ze-gypsum cementiated limalunga ne-68%. Xa ubungakanani besixhobo sokugcina amanzi buyi-0.15%, izinga lokugcina amanzi lezinto ze-gypsum cementiated linokufikelela kwi-90.5%. Kwaye iimfuno zokugcina amanzi zeplasta esezantsi. Umthamo wesixhobo sokugcina amanzi udlula i-0.2%, unyusa umthamo ngakumbi, kwaye izinga lokugcina amanzi lezinto ze-gypsum cementitious liyanda kancinci. Ukulungiswa kwezinto ze-anhydrite plastering. Umthamo ofanelekileyo we-hydroxypropyl methylcellulose yi-0.1%-0.15%.

Zithini iziphumo ezahlukeneyo ze-cellulose ezahlukeneyo kwi-plaster yase-paris?

Impendulo: Zombini i-carboxymethyl cellulose kunye ne-methyl cellulose zingasetyenziswa njengezinto zokugcina amanzi kwi-plaster of paris, kodwa isiphumo sokugcina amanzi se-carboxymethyl cellulose siphantsi kakhulu kunese-methyl cellulose, kwaye i-carboxymethyl cellulose inetyuwa yesodium, ngoko ke ifanelekile kwi-Plaster of Paris inefuthe lokulibazisa kwaye inciphisa amandla e-plaster.I-Methyl celluloseludibaniso olufanelekileyo lwezinto eziqinisa i-gypsum ezidibanisa ukugcinwa kwamanzi, ukuqina, ukuqina, kunye nokuxinana, ngaphandle kokuba ezinye iintlobo zinefuthe lokulibazisa xa umthamo uphezulu. Ngenxa yesi sizathu, uninzi lwezinto ezidibanisa i-gypsum zisebenzisa indlela yokudibanisa i-carboxymethyl cellulose kunye ne-methyl cellulose, ezingasebenzisi kuphela iimpawu zazo (ezifana nefuthe lokulibazisa le-carboxymethyl cellulose, ifuthe lokuqinisa le-methyl cellulose), kwaye zisebenzisa izibonelelo zazo ezifanayo (ezifana nokugcinwa kwamanzi kunye nefuthe lokuqina). Ngale ndlela, zombini ukusebenza kokugcinwa kwamanzi kwezinto eziqinisa i-gypsum kunye nokusebenza okubanzi kwezinto eziqinisa i-gypsum kunokuphuculwa, ngelixa ukunyuka kweendleko kugcinwa kwinqanaba eliphantsi.