Pōkole: Ka hoʻohana ʻana o nā mea kūlokohydroxypropyl methylcelluloseMa kahi o ka lawe ʻia mai, ua hoʻolauna ʻia ka hana ʻana o PVC me ke kekelē polymerization kiʻekiʻe. Ua noiʻi ʻia nā hopena o ʻelua ʻano hydroxypropyl methylcellulose ma nā waiwai o PVC me ke kekelē polymerization kiʻekiʻe. Ua hōʻike nā hopena he hiki ke hoʻololi i ka hydroxypropyl methyl cellulose kūloko no ka mea lawe ʻia mai.
ʻO nā resins PVC kiʻekiʻe-o-ka-polymerization e pili ana i nā resins PVC me ka awelika o ka polymerization ma mua o 1,700 a i ʻole me kahi ʻano i hoʻopili iki ʻia ma waena o nā molekala, ʻo ia hoʻi nā resins PVC maʻamau me ka awelika o ka polymerization o 2,500 [1]. Ke hoʻohālikelike ʻia me ka resin PVC maʻamau, ʻo ka resin PVC polymerization kiʻekiʻe he kūpaʻa kiʻekiʻe, kahi hoʻonohonoho liʻiliʻi, kūpaʻa wela maikaʻi, kūpaʻa ʻelemakule, kūpaʻa luhi a me ke kūpaʻa ʻaʻahu. He pani kūpono ia no ka rubber a hiki ke hoʻohana ʻia i nā ʻāpana sila kaʻa, nā uea a me nā kaula, nā catheters lapaʻau, a pēlā aku [2].
ʻO ke ʻano hana o PVC me ke kiʻekiʻe o ka polymerization ʻo ia ka polymerization suspension [3-4]. I ka hana ʻana o ke ʻano suspension, he mea kōkua koʻikoʻi ka dispersant, a ʻo kona ʻano a me ka nui e hoʻopilikia pololei i ke ʻano o ka ʻāpana, ka hoʻolaha ʻana o ka nui o ka ʻāpana, a me ka absorption plasticizer o ka resin PVC i hoʻopau ʻia. ʻO nā ʻōnaehana hoʻolaha maʻamau i hoʻohana ʻia he mau ʻōnaehana polyvinyl alcohol a me hydroxypropyl methylcellulose a me nā ʻōnaehana hoʻolaha hui polyvinyl alcohol, a hoʻohana nui nā mea hana kūloko i ka mea hope [5].
1 Nā mea maka nui a me nā kikoʻī
Ua hōʻike ʻia nā mea maka nui a me nā kikoʻī i hoʻohana ʻia i ka hoʻāʻo ma ka Papa 1. Hiki ke ʻike ʻia mai ka Papa 1 ua kūlike ka hydroxypropyl methylcellulose kūloko i koho ʻia ma kēia pepa me ka hydroxypropyl methylcellulose i lawe ʻia mai, kahi e hāʻawi ai i kahi koi no ka hoʻāʻo pani ma kēia pepa.
2 ʻIke hoʻāʻo
2. 1 Ka hoʻomākaukau ʻana o ka hopena hydroxypropyl methylcellulose
E lawe i kahi nui o ka wai deionized, e hoʻokomo i loko o kahi pahu a hoʻomehana iā ia i 70°C, a laila e hoʻohui mālie i ka hydroxypropyl methylcellulose me ka hoʻoulu mau ʻana. Lana mua ka cellulose ma luna o ka wai, a laila e hoʻopuehu mālie ʻia a hui like ʻia. E hoʻomaʻalili i ka wai a hiki i ka nui.
Papa 1 Nā mea maka nui a me kā lākou mau kikoʻī
| Inoa mea maka | Nā kikoʻī |
| ʻO ka monomer vinyl chloride | Ka helu maikaʻi ≥99. 98% |
| Wai i hoʻohemo ʻia ka paʻakai | ʻO ke alakaʻi ≤10.0 μs/cm, ka waiwai pH 5.00 a i 9.00 |
| ʻO ka waiʻona Polyvinyl A | Ke kekelē o ka ʻona ʻona 78.5% a i 81.5%, ka nui o ka lehu ≤0.5%, nā mea lele ≤5.0% |
| ʻO ka waiʻona polyvinyl B | Ke kekelē o ka ʻona ʻona 71.0% a i 73.5%, ka mānoanoa 4.5 a i 6.5mPa s, nā mea lele ≤5.0% |
| ʻO ka waiʻona polyvinyl C | Ke kekelē o ka ʻona ʻona 54.0% a i 57.0%, ka mānoanoa 800 ~ 1 400mPa s, ka nui o ka paʻa 39.5% a i 40.5% |
| ʻO ka hydroxypropyl methylcellulose A i lawe ʻia mai | ʻO ka mānoanoa 40 ~ 60 mPa s, ka hapa nui o ka methoxyl 28% ~ 30%, ka hapa nui o ka hydroxypropyl 7% ~ 12%, ka makū ≤5. 0% |
| ʻO ka hydroxypropyl methylcellulose B kūloko | ʻO ka mānoanoa 40 ~ 60 mPa s, ka hapa nui o ka methoxyl 28% ~ 30%, ka hapa nui o ka hydroxypropyl 7% ~ 12%, ka makū ≤5. 0% |
| ʻO Bis (2-ethylhexyl peroxydicarbonate) | ʻĀpana nuipa [(45 ~ 50) ± 1] % |
2. 2 Ke ʻano hoʻāʻo
Ma kahi hāmeʻa hoʻāʻo liʻiliʻi 10 L, e hoʻohana i ka hydroxypropyl methyl cellulose i lawe ʻia mai e hana i nā hoʻokolohua benchmark e hoʻoholo ai i ke ʻano kumu o ka hoʻāʻo liʻiliʻi; e hoʻohana i ka hydroxypropyl methyl cellulose kūloko e pani i ka hydroxypropyl methyl cellulose i lawe ʻia mai no ka hoʻāʻo ʻana; Ua hoʻohālikelike ʻia nā huahana resin PVC i hana ʻia e nā hydroxypropyl methyl cellulose like ʻole e aʻo i ka hiki ke hoʻololi i ka hydroxypropyl methyl cellulose kūloko. Wahi a nā hopena o ka hoʻāʻo liʻiliʻi, ua hoʻokō ʻia ka hoʻāʻo hana.
2. 3 mau ʻanuʻu hoʻāʻo
Ma mua o ka hopena, e hoʻomaʻemaʻe i ka ipu hao polymerization, e pani i ka valve lalo, e hoʻohui i kahi nui o ka wai desalinated, a laila e hoʻohui i ka mea hoʻolaha; e pani i ka uhi o ka ipu hao, e hoʻomaʻemaʻe ma hope o ka hala ʻana i ka hoʻāʻo kaomi nitrogen, a laila e hoʻohui i ka vinyl chloride monomer; ma hope o ka hoʻoulu anuanu, e hoʻohui i ka mea hoʻomaka; E hoʻohana i ka wai e hoʻopuni ana e hoʻokiʻekiʻe i ka mahana i loko o ka ipu hao i ka mahana o ka hopena, a hoʻohui i ka hopena ammonium bicarbonate i ka manawa kūpono i kēia kaʻina hana e hoʻoponopono i ka waiwai pH o ka ʻōnaehana hopena; i ka wā e hāʻule ai ke kaomi hopena i ke kaomi i kuhikuhi ʻia i loko o ke ʻano, e hoʻohui i kahi mea hoʻopau a me kahi mea hoʻopau, a hoʻokuʻu ʻia Ua loaʻa ka huahana i pau o ka resin PVC ma o ka centrifugation a me ka hoʻomaloʻo ʻana, a ua laʻana ʻia no ka nānā ʻana.
2. 4 Nā ʻano loiloi
Wahi a nā ʻano hoʻāʻo kūpono i ka maʻamau ʻoihana Q31/0116000823C002-2018, ua hoʻāʻo ʻia a kālailai ʻia ka helu viscosity, ka nui o ka ʻike ʻia, nā mea lele (me ka wai) a me ka absorption plasticizer o 100 g PVC resin o ka PVC resin i hoʻopau ʻia; Ua hoʻāʻo ʻia ka nui o nā ʻāpana awelika o ka resin PVC; ua nānā ʻia ke ʻano o nā ʻāpana resin PVC me ka hoʻohana ʻana i kahi microscope electron scanning.
3 Nā Hualoaʻa a me ke Kūkākūkā
3. 1 Ka loiloi hoʻohālikelike o ka maikaʻi o nā ʻāpana like ʻole o ka resin PVC i ka polymerization liʻiliʻi
E kaomi i ka 2. Wahi a ke ʻano hoʻāʻo i wehewehe ʻia ma 4, ua hoʻāʻo ʻia kēlā me kēia pūʻulu o ka resin PVC liʻiliʻi i hoʻopau ʻia, a ua hōʻike ʻia nā hopena ma ka Papa 2.
Nā hopena o ka Papa 2 o nā pūʻulu like ʻole o ka hoʻāʻo liʻiliʻi
| Pūʻulu | ʻO ka hydroxypropyl methyl cellulose | Ka nui o ka ʻike ʻia/(g/mL) | Ka nui o nā ʻāpana awelika/μm | Ka mānoanoa/(mL/g) | Ka omo ʻana o ka plasticizer o 100 g PVC resin/g | Mea lele/% |
| 1# | Hoʻokomo mai | 0.36 | 180 | 196 | 42 | 0.16 |
| 2# | Hoʻokomo mai | 0.36 | 175 | 196 | 42 | 0.20 |
| 3# | Hoʻokomo mai | 0.36 | 182 | 195 | 43 | 0.20 |
| 4# | kūloko | 0.37 | 165 | 194 | 41 | 0.08 |
| 5# | kūloko | 0.38 | 164 | 194 | 41 | 0.24 |
| 6# | kūloko | 0.36 | 167 | 194 | 43 | 0.22 |
Hiki ke ʻike ʻia mai ka Papa 2: ʻO ka density apparent, ka helu viscosity a me ka absorption plasticizer o ka resin PVC i loaʻa ua kokoke loa ma ka hoʻohana ʻana i nā cellulose like ʻole no ka hoʻāʻo liʻiliʻi; ʻo ka huahana resin i loaʻa ma ka hoʻohana ʻana i ka formula hydroxypropyl methylcellulose kūloko ʻOi aku ka liʻiliʻi o ka nui o ka ʻāpana awelika.
Hōʻike ka Kiʻi 1 i nā kiʻi SEM o nā huahana resin PVC i loaʻa ma ka hoʻohana ʻana i nā hydroxypropyl methylcellulose like ʻole.
(1)—Hydroxypropyl methylcellulose i lawe ʻia mai
(2)—ʻO ka hydroxypropyl methylcellulose kūloko
Kiʻi． 1 SEM o nā resins i hana ʻia ma ka 10-L polymerizer i ke alo o nā hydroxypropyl methyl cellulose like ʻole.
Hiki ke ʻike ʻia mai ke Kiʻi 1 ua like like nā ʻano o ka ʻili o nā ʻāpana resin PVC i hana ʻia e nā mea hoʻolaha cellulose like ʻole.
I ka hōʻuluʻulu ʻana, hiki ke ʻike ʻia he hiki i ka hydroxypropyl methylcellulose kūloko i hoʻāʻo ʻia ma kēia pepa ke pani i ka hydroxypropyl methylcellulose i lawe ʻia mai.
3. 2 Ka loiloi hoʻohālikelike o ke ʻano o ka resin PVC me ke kekelē polymerization kiʻekiʻe i ka hoʻāʻo hana
Ma muli o ke kumukūʻai kiʻekiʻe a me ka pilikia o ka hoʻāʻo hana ʻana, ʻaʻole hiki ke hoʻopili pololei ʻia ka papahana hoʻololi piha o ka hoʻāʻo liʻiliʻi. No laila, ua hoʻohana ʻia ka papahana o ka hoʻonui mālie ʻana i ka hapa o ka hydroxypropyl methylcellulose kūloko i loko o ke ʻano hana. Hōʻike ʻia nā hopena hoʻāʻo o kēlā me kēia pūʻulu ma ka Papa 3. i hōʻike ʻia.
Papa 3 Nā hopena hoʻāʻo o nā ʻāpana hana like ʻole
| Pūʻulu | M (hydroxypropyl methyl cellulose kūloko):M (hydroxypropyl methyl cellulose i lawe ʻia mai) | Ka nui o ka ʻike ʻia/(g/mL) | Helu mānoanoa/(mL/g) | Ka omo ʻana o ka plasticizer o 100 g PVC resin/g | Mea lele/% |
| 0# | 0:100 | 0.45 | 196 | 36 | 0.12 |
| 1# | 1.25:1 | 0.45 | 196 | 36 | 0.11 |
| 2# | 1.25:1 | 0.45 | 196 | 36 | 0.13 |
| 3# | 1.25:1 | 0.45 | 196 | 36 | 0.10 |
| 4# | 2.50:1 | 0.45 | 196 | 36 | 0.12 |
| 5# | 2.50:1 | 0.45 | 196 | 36 | 0.14 |
| 6# | 2.50:1 | 0.45 | 196 | 36 | 0.18 |
| 7# | 100:0 | 0.45 | 196 | 36 | 0.11 |
| 8# | 100:0 | 0.45 | 196 | 36 | 0.17 |
| 9# | 100:0 | 0.45 | 196 | 36 | 0.14 |
Hiki ke ʻike ʻia mai ka Papa 3 ua hoʻonui mālie ʻia ka hoʻohana ʻana o ka hydroxypropyl methylcellulose kūloko a hiki i ka wā i pani ai nā ʻāpana āpau o ka hydroxypropyl methylcellulose kūloko i ka hydroxypropyl methylcellulose i lawe ʻia mai. ʻAʻole i loli nui nā ʻōuli nui e like me ka absorption plasticizer a me ka density apparent, e hōʻike ana e hiki i ka hydroxypropyl methylcellulose kūloko i koho ʻia ma kēia pepa ke pani i ka hydroxypropyl methylcellulose i lawe ʻia mai i ka hana ʻana.
4 Hopena
ʻO ka hoʻāʻo ʻana o ka homehydroxypropyl methyl celluloseMa kahi mea hoʻāʻo liʻiliʻi 10 L e hōʻike ana he hiki ke hoʻololi i ka hydroxypropyl methyl cellulose i lawe ʻia mai; hōʻike nā hopena hoʻāʻo hoʻololi hana e hoʻohana ʻia ka hydroxypropyl methyl cellulose kūloko no ka hana ʻana i ka resin PVC, ʻaʻohe ʻokoʻa koʻikoʻi o nā hōʻailona maikaʻi nui o ka resin PVC i hoʻopau ʻia a me ka hydroxypropyl methyl cellulose i lawe ʻia mai. I kēia manawa, ʻoi aku ka haʻahaʻa o ke kumukūʻai o ka cellulose kūloko ma ka mākeke ma mua o ka cellulose i lawe ʻia mai. No laila, inā hoʻohana ʻia ka cellulose kūloko i ka hana ʻana, hiki ke hoʻemi nui ʻia ke kumukūʻai o nā mea kōkua hana.
Ka manawa hoʻouna: ʻApelila-25-2024