Polyanionic cellulose (PAC)
Polyanionic cellulose (PAC) waa derivative cellulose ether biyo-milmi leh oo ay diyaarisay wax ka beddel kiimikaad ee cellulose dabiiciga ah.Waa eter-ka cellulose-ka biyaha ku milma oo muhiim ah.Inta badan waxa loo isticmaalaa sida milixda soodhiyamka, waxaana si weyn loogu isticmaalaa qodista saliidda, gaar ahaan ceelasha milixda iyo qodista saliidda xeebaha.
PAC-Codsiga ku jira Batroolka
1. Shaqooyinka PAC iyo CMC ee goobaha saliidda waa sidan soo socota.
- dhoobada ay ku jiraan PAC iyo CMC waxay ka dhigi kartaa gidaarka ceelku inuu sameeyo keeg khafiif ah oo adag oo leh awood yar oo yareynaya biyaha;
- Ka dib marka lagu daro PAC iyo CMC dhoobada, qodista qodista waxay heli kartaa awood hoose oo dhogorta bilawga ah, waxay ka dhigi kartaa dhoobada si sahlan si ay u sii daayaan gaasta ku duudduuban, oo si degdeg ah u tuura qashinka godka dhoobada ah;
Sida kala firdhinta kale ee la hakiyey, qodista dhoobada waxay leedahay muddo jiritaan, kaas oo la dejin karo lana kordhin karo iyadoo lagu darayo PAC iyo CMC.
2. PAC iyo CMC waxay leeyihiin waxqabadka wanaagsan ee soo socda ee codsiga goobta saliidda:
- Beddel heer sare ah, isku mid ahaanshaha wanaagsan ee beddelka, viscosity sare iyo qiyaasta hooseeya, si wax ku ool ah u wanaajinaya waxtarka adeegga dhoobada;
- Iska caabbinta qoyaanka wanaagsan, caabbinta milixda iyo caabbinta alkali, oo ku habboon biyaha cusub, biyaha badda iyo dhoobada biyo-salaysan ee saturated;
- Keega dhoobada ah ee la sameeyay waa mid tayo wanaagsan leh oo deggan, kaas oo si wax ku ool ah u xasilin kara qaab dhismeedka ciidda jilicsan kana hortagaya burburka derbiga usheeda dhexe;
- Waxay ku habboon tahay nidaamyada dhoobada leh ee xakamaynta nuxur adag oo adag iyo kala duwanaansho ballaaran.
3. Tilmaamaha codsiga ee PAC iyo CMC ee qodista saliidda:
-Waxay leedahay awood sare oo xakamaynta luminta biyaha, gaar ahaan yaraynta luminta dareeraha waxtarka leh.Qiyaasta hooseeya, waxay xakameyn kartaa luminta biyaha heer sare iyada oo aan saameyn ku yeelan sifooyinka kale ee dhoobada;
- Waxay leedahay iska caabin heerkul wanaagsan iyo iska caabin milix ah oo aad u fiican.Waxay weli yeelan kartaa awood wanaagsan oo yaraynta khasaaraha biyaha iyo rheology gaar ah oo hoos yimaada xoogaa milix ah.Viscosity ayaa ku dhawaad isma beddelin ka dib marka lagu milmo biyaha milixda ah.Waxay si gaar ah ugu habboon tahay qodista xeebaha iyo ceelasha qoto dheer;
- Waxay si fiican u xakameyn kartaa rheology ee dhoobada waxayna leedahay thixotropy wanaagsan.Waxay ku habboon tahay dhoobo kasta oo biyo ku salaysan oo biyo nadiif ah, biyaha badda iyo brine saturated;
- Intaa waxaa dheer, PAC waxaa loo isticmaalaa dareeraha sibidhka si looga hortago in dareeruhu galo daloolada iyo jabka;
- Dareeraha shaandhada shaandhada ee lagu diyaariyey PAC waxay leedahay iska caabin wanaagsan oo ah 2% KCl xal (waa in lagu daraa marka la diyaarinayo dareeraha shaandhada shaandhada), milanka wanaagsan, isticmaalka habboon, waxaa lagu diyaarin karaa goobta, xawaaraha gelitaanka degdegga ah iyo awoodda qaadista ciidda xooggan.Marka loo isticmaalo qaab-dhismeed awood hooseeya, saameynteeda saxaafadda shaandheynta ayaa aad u fiican.
Qiyaasta Faahfaahinta
| Qadarka lagu daro (%) | |
| Wax soo saarka saliida dilaaca | 0.4-0.6% |
| Wakiilka daaweynta qodista | 0.2-0.8% |
| Haddii aad u baahan tahay inaad habayso, waxaad bixin kartaa qaacido iyo habraac faahfaahsan. | |
| Tilmaamayaal | ||
| PAC-HV | PAC-LV | |
| Midabka | budo jaale ah oo cad ama khafiif ah | Caddaan ama budo jaale ah ama qaybo |
| biyaha ku jira | 10.0% | 10.0% |
| PH | 6.0-8.5 | 6.0-8.5 |
| Darajada beddelka | 0.8 | 0.8 |
| sodium chloride | 5% | 2% |
| daahirnimo | 90% | 90% |
| Cabbirka walxaha | 90% dhaaf 250 microns (60 mesh) | 90% dhaaf 250 microns (60 mesh) |
| Viscosity (b) 1% xal aqueous ah | 3000-6000mPa.s | 10-100mPa.s |
| Waxqabadka codsiga | ||
| Qaabka | Tusmada | |
| 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 |