Ungayikhetha njani i-hydroxypropyl methylcellulose?

Yintoni umahluko phakathii-hydroxypropyl methylcellulose(HPMC) ene-S okanye engenayo?

1. I-HPMC yahlulwe ngohlobo olukhawulezileyo nohlobo lokusasazeka ngokukhawuleza

Uhlobo lokusasazeka ngokukhawuleza lwe-HPMC lufakwe unobumba u-S. Ngexesha lenkqubo yokuvelisa, kufuneka kongezwe i-glyoxal.

Uhlobo olukhawulezileyo lwe-HPMC alufaki onobumba, njengokuthi “100000″ ngu “100000 viscosity fast dispersion type HPMC”.

2. Ukuba kukho okanye akukho S, iimpawu zahlukile

I-HPMC esasazeka ngokukhawuleza isasazeka ngokukhawuleza emanzini abandayo ize inyamalale emanzini. Ngeli xesha, ulwelo aluna-viscosity, kuba i-HPMC isasazeka kuphela emanzini, kwaye akukho kunyibilika kokwenyani. Emva kwemizuzu emibini, i-viscosity yolwelo iyanda kancinci kancinci, yenze ulwelo olucacileyo olunamathelayo. I-colloid etyebileyo.

I-HPMC ekhawulezileyo inokusasazeka ngokukhawuleza emanzini ashushu malunga nama-70°C. Xa ubushushu buhla bufikelela kubushushu obuthile, i-viscosity ibonakala kancinci de kube kwakheka i-colloid ecacileyo ethambileyo.

3. Ukuba u-S okanye ungenaye, injongo yahlukile

I-HPMC ekhawulezileyo ingasetyenziswa kuphela kwi-putty powder kunye ne-mortar. Kwi-glue engamanzi, ii-coating kunye nezixhobo zokucoca, i-clump iya kwenzeka kwaye ayinakusetyenziswa.

I-HPMC esasazeka ngokukhawuleza ineendlela ezahlukeneyo zokusetyenziswa. Ingasetyenziswa kwi-putty powder, kwi-mortar, kwi-glue engamanzi, kwipeyinti nakwiimveliso zokuhlamba ngaphandle kokuphazamiseka.

Indlela yokunyibilikisa

1. Thatha umlinganiselo ofunekayo wamanzi ashushu, uwafake kwisitya uze uwafudumeze ukuya kuthi ga kwi-80°C, uze wongeze kancinci le mveliso xa uvuselela kancinci. I-cellulose iyadada emanzini ekuqaleni, kodwa isasazeka kancinci kancinci ukuze yenze i-slurry efanayo. Pholisa isisombululo ngokushukumisa.

2. Okanye fudumeza i-1/3 okanye i-2/3 yamanzi ashushu ukuya kuma-85°C, yongeza i-cellulose ukuze ufumane i-slurry yamanzi ashushu, uze wongeze amanzi abandayo aseleyo, uqhubeke uvuselela, uze upholise umxube ophumayo.

3. I-Cellulose inenombolo encinci ye-mesh, kwaye ikhona njengesuntswana elincinci kwi-powder exutywe ngokulinganayo, kwaye iyanyibilika ngokukhawuleza xa idibana namanzi ukuze yenze i-viscosity efunekayo.

4. Yongeza i-cellulose kancinci kwaye ngokulinganayo kubushushu begumbi, kwaye uqhubeke uvuselela ngexesha lokufaka ide kubekho isisombululo esicacileyo.

Zeziphi izinto ezichaphazela ukugcinwa kwamanzi kwe-hydroxypropyl methylcellulose?

Ukugcinwa kwamanzi kwemveliso ye-hydroxypropyl methylcellulose HPMC ngokwayo kudla ngokuchaphazeleka zezi zinto zilandelayo:

1. Ukulingana kwe-ether ye-cellulose HPMC

I-HPMC esabela ngokulinganayo inokusasazwa okufanayo kwamaqela e-methoxy kunye ne-hydroxypropoxy kunye nokugcinwa kwamanzi okuphezulu.

2. Ubushushu bejeli yobushushu be-cellulose ether HPMC

Okukhona ubushushu bejeli yobushushu buphezulu, kokukhona izinga lokugcina amanzi liphezulu; kungenjalo, izinga lokugcina amanzi liphantsi.

3. I-ether ye-cellulose ye-HPMC viscosity

Xa i-viscosity ye-HPMC isanda, izinga lokugcina amanzi nalo liyakhula; xa i-viscosity ifikelela kwinqanaba elithile, ukunyuka kwenqanaba lokugcina amanzi kudla ngokuba buthathaka.

Isixa sokongeza i-HPMC kwi-cellulose ether

Okukhona isixa esongeziweyo se-cellulose ether HPMC sikhulu, kokukhona izinga lokugcinwa kwamanzi liphezulu kwaye kokukhona isiphumo sokugcinwa kwamanzi singcono.

Kwinqanaba le-0.25-0.6%, izinga lokugcina amanzi liyanda ngokukhawuleza ngokonyuka kwenani lokongezwa; xa inani lokongezwa lisanda ngakumbi, umkhwa wokwanda kwenani lokugcina amanzi uya ucotha.