Polyanionic cellulose (PAC)
ʻO ka polyanionic cellulose (PAC) he wai-soluble cellulose ether derivative i hoʻomākaukau ʻia e ka hoʻololi kemika o ka cellulose maoli.He mea koʻikoʻi ia e hoʻoheheʻe ʻia i ka wai cellulose ether.Hoʻohana mau ʻia ʻo ia e like me kona paʻakai sodium a hoʻohana nui ʻia i ka ʻeli ʻaila, ʻoi aku ka nui o nā pūnāwai wai paʻakai a me ka ʻeli aila waho.
PAC-noi ma ka aila
1. ʻO nā hana a PAC a me CMC ma ka māla aila penei:
- ʻO ka lepo i loaʻa iā PAC a me CMC hiki ke hana i ka pā punawai i mea lahilahi a paʻakikī kānana keke me ka haʻahaʻa haʻahaʻa a hoʻemi i ka poho wai;
- Ma hope o ka hoʻohui ʻana i ka PAC a me CMC i loko o ka ʻōpala, hiki i ka rig wili ke loaʻa ka ikaika ʻāʻā haʻahaʻa haʻahaʻa, e maʻalahi i ka lepo e hoʻokuʻu i ke kinoea i ʻōwili ʻia i loko, a e hoʻolei koke i nā ʻōpala i loko o ka lua lepo;
- E like me nā dispersions ʻē aʻe i hoʻokuʻu ʻia, loaʻa i ka lepo wili i kekahi manawa ola, hiki ke hoʻopaʻa ʻia a hoʻonui ʻia me ka hoʻohui ʻana i ka PAC a me CMC.
2. Loaʻa iā PAC a me CMC ka hana maikaʻi loa ma ka noi ʻaila:
- Ke kūlana kiʻekiʻe o ka hoʻololi ʻana, ka like like o ka hoʻololi ʻana, ka viscosity kiʻekiʻe a me ka haʻahaʻa haʻahaʻa, e hoʻomaikaʻi maikaʻi ana i ka lawelawe ʻana i ka lepo;
- Ke kūpaʻa maikaʻi o ka wai, ka paʻakai paʻakai a me ke kūpaʻa alkali, kūpono no ka wai maʻemaʻe, ka wai kai a me ka ʻōpala wai i hoʻopaʻa ʻia i ka brine;
- He ʻano maikaʻi a kūpaʻa ka keke lepo i hoʻokumu ʻia, hiki ke hoʻopaʻa pono i ke ʻano o ka lepo palupalu a pale i ka hiolo ʻana o ka paia o ka lāʻau;
- He kūpono ia no nā ʻōnaehana lepo me ka mana paʻakikī paʻakikī a me ka laulā ākea.
3. Nā hiʻohiʻona noi o PAC a me CMC i ka ʻaila ʻaila:
- Loaʻa iā ia ka hiki ke hoʻomalu i ka wai, ʻoi aku ka maikaʻi o ka hoʻemi ʻana i ka wai.Me ka haʻahaʻa haʻahaʻa, hiki iā ia ke hoʻomalu i ka nalowale o ka wai ma kahi kiʻekiʻe me ka hoʻopilikia ʻole i nā waiwai ʻē aʻe o ka lepo;
- Loaʻa iā ia ka pale wela maikaʻi a me ke kūpaʻa paʻakai maikaʻi loa.Hiki iā ia ke loaʻa ka hiki ke hoʻemi maikaʻi i ka wai a me kekahi rheology ma lalo o kahi paʻakai paʻakai.ʻAʻole loli ka viscosity ma hope o ka hoʻoheheʻe ʻana i ka wai paʻakai.He kūpono loa ia no ka ʻeli ʻana i waho a me nā luawai hohonu;
- Hiki iā ia ke hoʻomalu maikaʻi i ka rheology o ka lepo a he thixotropy maikaʻi.He kūpono ia no kēlā me kēia lepo wai i loko o ka wai hou, ka wai kai a me ka brine saturated;
- Eia hou, hoʻohanaʻia ka PAC e like me ka wai cementing e pale i ka wai mai ke komoʻana i nā pores a me nā haʻihaʻi;
- ʻO ka wai paʻi kānana i hoʻomākaukau ʻia me ka PAC he kūpaʻa maikaʻi i ka 2% KCl solution (pono e hoʻohui ʻia i ka wā e hoʻomākaukau ai i ka wai kānana kaomi), hiki ke hoʻoheheʻe maikaʻi ʻia, hoʻohana maʻalahi, hiki ke hoʻomākaukau ʻia ma ka pūnaewele, wikiwiki ka hana ʻana o ka gel a me ke one ikaika.Ke hoʻohana ʻia i ka hoʻokumu haʻahaʻa haʻahaʻa, ʻoi aku ka maikaʻi o kāna hopena kaomi kānana.
Nā ʻāpana kikoʻī
| Ka nui hoʻohui (%) | |
| ʻAila hoʻoheheʻe ʻaila | 0.4-0.6% |
| ʻO ka lāʻau lapaʻau wili | 0.2-0.8% |
| Inā pono ʻoe e hoʻopilikino, hiki iā ʻoe ke hāʻawi i nā kikoʻī kikoʻī a me ke kaʻina hana. | |
| Nā hōʻailona | ||
| PAC-HV | PAC-LV | |
| kalakala | Pauda keʻokeʻo a māmā paha | ʻO ka pauka keʻokeʻo a i ʻole ka melemele māmā a i ʻole nā ʻāpana |
| ʻano wai | 10.0% | 10.0% |
| PH | 6.0-8.5 | 6.0-8.5 |
| Degere o ka pani | 0.8 | 0.8 |
| sodium chloride | 5% | 2% |
| Maemae | 90% | 90% |
| Nui ʻāpana | 90% hala 250 microns (60 mesh) | 90% hala 250 microns (60 mesh) |
| Viscosity (b) 1% solution wai | 3000-6000mPa.s | 10-100mPa.s |
| Hana noi | ||
| Hoʻohālike | Papa kuhikuhi | |
| AV | FL | |
| PAC-ULV | ≤10 | ≤16 |
| PAC－LV1 | ≤30 | ≤16 |
| PAC－LV2 | ≤30 | ≤13 |
| PAC－LV3 | ≤30 | ≤13 |
| PAC－LV4 | ≤30 | ≤13 |
| PAC－HV1 | ≥50 | ≤23 |
| PAC－HV2 | ≥50 | ≤23 |
| PAC－HV3 | ≥55 | ≤20 |
| PAC－HV4 | ≥60 | ≤20 |
| PAC－UHV1 | ≥65 | ≤18 |
| PAC－UHV2 | ≥70 | ≤16 |
| PAC－UHV3 | ≥75 | ≤16 |