Kuputuhi:Hei whakakapi i te slurry polyvinyl alcohol (PVA) kore-degradable, hemp stalk cellulose ether-hydroxypropyl methylcellulose i mahia mai i nga otaota hemp ahuwhenua, ka konatunatua ki te maaka motuhake hei whakarite i te slurry.Ko te miro whakahanumi polyester-cotton T/C65/35 14.7 tex te rahi, ka whakamatauria tona mahinga rahi.Ko te tukanga tino pai o te hanga hydroxypropyl methylcellulose e whai ake nei: ko te hautanga papatipu o te reitia he 35%;ko te ōwehenga kōpeketanga o te cellulose alkali he 2.4;Ko te ōwehenga rōrahi wai o te mewaro me te propylene oxide he 7:3;waimeha ki te isopropanol;ko te 2 te pehanga tauhohenga.0MPa.Ko te rahi i whakaritea ma te ranu hydroxypropyl methylcellulose me te māngaro motuhake he iti ake te COD me te pai ake ki te taiao, ka taea e nga tohu rahinga katoa te whakakapi i te rahi PVA.
kupu matua:hemp kakau;hemp stalk cellulose ether;waipiro polyvinyl;te rahinga ether cellulose
0.Kupu Whakataki
Ko Haina tetahi o nga whenua whai rawa te kakau kakau witi.Neke atu i te 700 miriona taranata te hua hua, a ko te reiti whakamahi kakau kakau he 3% anake ia tau.He nui nga rauemi kakau witi kaore ano kia whakamahia.Ko te kakau witi he tino rawa lignoscellulosic raw rauemi, e taea te whakamahi i roto i te kai, tongi, pärönaki cellulose me ētahi atu hua.
I tenei wa, ko te whakakore i te parahanga wai para i roto i nga mahi hanga kakano ko tetahi o nga puna parahanga nui rawa atu.He tino nui te tono hāora matū o PVA.I muri i te tukunga o te wai para ahumahi i mahia e te PVA i roto i te mahi ta me te tae ki te awa, ka aukati, ka ngaro ranei te manawa o nga rauropi wai.I tua atu, ka whakaparahako te PVA i te tuku me te heke o nga konganuku taumaha i roto i nga parataiao i roto i nga wai, ka nui ake nga raru o te taiao.Hei whakahaere i nga rangahau mo te whakakapi i te PVA me te slurry matomato, he mea tika kia kaua e tutuki nga whakaritenga o te mahinga rahi, engari ki te whakaiti hoki i te parahanga o te wai me te hau i te wa o te mahinga rahi.
I roto i tenei rangahau, hemp stalk cellulose ether-hydroxypropyl methylcellulose (HPMC) i taka mai i nga otaota hemp ahuwhenua, a ka korerohia tana mahi whakaputa.Whakaranuhia te hydroxypropyl methylcellulose me te rahi o te māngaro hei rahi mo te rahinga, whakatairitea ki te rahi PVA, ka matapakihia te mahinga o te rahinga.
1. Whakamatau
1 .1 Nga rawa me nga taputapu
Hemp stalk, Heilongjiang;polyester-cotton miro whakakotahi T/C65/3514.7 tex;hemp hemp cellulose ether-hydroxypropyl methylcellulose i hanga ake;FS-101, māngaro whakarerekē, PVA-1799, PVA-0588, Liaoning Zhongze Group Chaoyang Textile Co., Ltd.;propanol, kōeke moni;propylene oxide, waikawa acetic glacial, konutai waihā, isopropanol, tātari parakore;methyl chloride, hauota tino parakore.
GSH-3L hohenga hohenga, JRA-6 whakaatu mamati aukume whakaoho wai pati, DHG-9079A hiko whakawera pāmahana whakamaroke oumu, IKARW-20 overhead mihini agitator, ESS-1000 tauira mihini rahi, YG 061/PC hiko mita hiko miro kotahi , LFY-109B rorohiko abrasion miro whakamātautau.
1.2 Te whakarite i te hydroxypropyl methylcellulose
1. 2. 1 Te whakarite i te muka kawakore
Wehea te kakau Hemp, kuru kia 20 mata ki te pulverizer, tāpiri i te paura kakau Hemp ki te 35% NaOH wairewa wai, ka waiwaitia i te pāmahana rūma mō te 1 .5 ~ 2 .0 h.Kotēhia te muka kawakore kua whakapouri kia 1. 2:1 te ōwehenga papatipu o te kawakore, cellulose, me te wai.2:1.
1. 2. 2 Tauhohenga whakaetere
Makahia te cellulose alkali kua rite ki roto i te ketere tauhohenga, tāpirihia te 100 mL o te isopropanol hei waimeha, tāpirihia te wē 140 mL o te methyl chloride me te 60 mL o te propylene oxide, whakawera, ka pehia ki te 2 .0 MPa, whakanekehia te mahana ki te 45°C mo te 1-2 haora, ka tauhohe ki te 75°C mo te 1-2 haora ki te whakarite hydroxypropyl methylcellulose.
1. 2. 3 Tukatuka-muri
Whakaritea te pH o te etera cellulose kua whakahaehae me te waikawa ahetiki hukapapa ki te 6 .5 ~ 7 .5, ka horoia ki te propanol e toru nga wa, ka whakamaroke ki te oumu i te 85°C.
1.3 Te tukanga whakaputa o te hydroxypropyl methylcellulose
1. 3. 1 Te awenga o te tere hurihuri i runga i te whakaritenga o te cellulose ether
I te nuinga o te wa ko te tauhohenga etherification he tauhohenga rereke mai i roto ki roto.Mena karekau he mana o waho, he uaua ki te whakauru atu o te kaikawe etherification ki te whakamaaramatanga o te cellulose, na he mea tika kia whakakotahi katoa te kaihoko etherification me te cellulose ma te whakaohooho.I tenei rangahau, i whakamahia he reactor whakakorikori pehanga teitei.I muri i nga whakamatautau me nga whakaaturanga, ko te tere hurihuri kua tohua ko 240-350 r / min.
1. 3. 2 Ko te painga o te kukū kawakore ki te whakarite o te cellulose ether
Ka taea e Alkali te whakangaro i te hanganga kiato o te cellulose kia pupuhi, a, ka rite tonu te pupuhi o te rohe amorphous me te rohe tioata, ka pai te haere o te etherification.I roto i te tukanga whakaputa o te cellulose ether, ko te nui o te alkali e whakamahia ana i roto i te tukanga cellulose alkalization he nui te awe ki te pai o te etherification o nga hua etherification me te tohu o te whakakapi o nga roopu.I roto i te tukanga whakarite o te hydroxypropyl methylcellulose, i te mea ka piki ake te kukū o te rei, ka piki ano te ihirangi o nga roopu methoxyl;engari, ka heke te kukū o te reito, te hydroxypropyl methylcellulose He nui ake te ihirangi turanga.Ko te ihirangi o te roopu methoxy he rite tonu ki te kukū o te rei;ko te ihirangi o te hydroxypropyl he taurite ki te kukū o te rei.Ko te hautanga papatipu o te NaOH i tohua hei 35% i muri i nga whakamatautau tukurua.
1. 3. 3 Ko te painga o te tauwehenga pehi cellulose alkali ki te whakarite i te etera cellulose
Ko te kaupapa o te pehi i te muka alkali ko te whakahaere i te ihirangi wai o te cellulose alkali.I te iti rawa o te tauwehenga pehi, ka piki ake te wai, ka heke te kukū o te rei, ka heke te tere o te etherification, ka hauwaihia te kaihoko etherification ka piki ake nga tauhohenga taha., ka tino heke te kaha o te etherification.A, no te nui rawa te ōwehenga pēhi, ka heke te ihirangi wai, e kore e taea te tetere te cellulose, a kahore he tauhohenga, a e kore e taea e te kaihoko etherification tino whakapā ki te cellulose alkali, a he pāhiwihiwi te tauhohenga.I muri i te maha o nga whakamatautau me nga whakataurite, ka whakatauhia ko te ōwehenga papatipu o te alkali, te wai me te cellulose he 1. 2:1.2:1.
1. 3. 4 Te awenga o te pāmahana ki runga i te whakaritenga o te cellulose ether
I roto i te whakaritenga o te hydroxypropyl methylcellulose, tuatahi te whakahaere i te pāmahana i te 50-60 °C ka pupuri i te pāmahana mo te 2 haora.Ka taea te kawe i te tauhohenga hydroxypropylation i te 30 ℃, a ka piki te tere o te tauhohenga hydroxypropylation ki te 50 ℃;āta whakanuia te pāmahana ki te 75 ℃, ka whakahaere i te pāmahana mo te 2 haora.I te 50°C, he uaua te tauhohenga o te methylation, i te 60°C, he puhoi te tere tauhohenga, a, i te 75°C, ka tino tere te tere o te tauhohenga methylation.
Ko te whakarite o te hydroxypropyl methylcellulose me te mana o te pāmahana maha-waahanga e kore e taea anake te whakahaere i te toenga o nga roopu methoxyl me te hydroxypropyl, engari ka awhina ano hoki ki te whakaiti i nga tauhohenga taha me te maimoatanga i muri mai, me te whiwhi hua me te hanganga whaitake.
1. 3. 5 Te awenga o te owehenga inenga a te kaihoko whakaeera ki te whakarite i te etera cellulose
I te mea ko te hydroxypropyl methylcellulose he etera whakauru kore-ionic, ka whakakapihia nga roopu methyl me te hydroxypropyl ki runga i nga mekameka macromolecular hydroxypropyl methylcellulose, ara, he rereke C i ia tuunga mowhiti huka.I tetahi atu ringa, he nui ake te marara me te matapōkeretanga o te ōwehenga tohatoha o te methyl me te hydroxypropyl.Ko te wairewa o te HPMC e pa ana ki te ihirangi o te roopu methoxy.A, no te he iti te ihirangi o te rōpū methoxy, ka taea te rewa i roto i te alkali kaha.Ka piki ake te ihirangi methoxyl, ka kaha ake te aro ki te pupuhi wai.Ko te teitei ake o te ihirangi methoxy, ko te pai ake o te whakarewatanga o te wai, a ka taea te hanga hei slurry.
Ko te nui o te methyl chloride me te propylene oxide he paanga tika ki te ihirangi o te methoxyl me te hydroxypropyl.Hei whakarite i te hydroxypropyl methylcellulose me te wairewa pai, ko te ōwehenga rōrahi wai o te methyl chloride me te propylene oxide i tohua hei 7:3.
1.3.6 Ko te tukanga whakaputa tino pai o te hydroxypropyl methylcellulose
Ko te taputapu tauhohenga he reactor whakakorikori teitei;te tere hurihanga ko 240-350 r / min;ko te hautau papatipu o te reitia he 35%;ko te ōwehenga kōpeketanga o te cellulose alkali he 2. 4;Hydroxypropoxylation i te 50°C mo te 2 haora, methoxylation i te 75°C mo te 2 haora;māngai whakaethering methyl chloride me te propylene oxide ōwehenga rōrahi wai 7:3;korehau;pehanga 2.0 MPa;he isopropanol te diluent.
2. Te kimi me te tono
2.1 SEM o te hemp cellulose me te alkali cellulose
Ko te whakataurite i te hemp cellulose kaore i rongoa me te hemp cellulose i rongoa ki te 35% NaOH, ka tino kitea he nui ake nga kapiti mata o te cellulose alkalized, he nui ake te mata o te mata, he teitei ake te mahi me te ngawari o te tauhohenga etherification.
2.2 Te Whakataunga Hinengaro Infrared
Ko te cellulose i tangohia mai i nga kakau hemp i muri i te maimoatanga me te awhi infrared o HPMC kua whakaritea mai i te hemp stalk cellulose.I roto ia ratou, ko te roopu whakauru kaha me te whanui i te 3295 cm -1 ko te roopu whakaurunga wiri totoro o te roopu hydroxyl hononga HPMC, ko te roopu whakauru i te 1250 ~ 1460 cm -1 ko te roopu whakauru o CH, CH2 me CH3, me te whakaurunga. Ko te roopu i te 1600 cm -1 ko te roopu whakauru wai i roto i te roopu whakauru polymer.Ko te roopu whakauru i te 1025cm -1 ko te roopu whakauru o C - O - C i roto i te polymer.
2.3 Te whakatau i te Viscosity
Tangohia te tauira o te taakahu kua rite ki te cellulose ether ka tapirihia ki te ipurau hei whakarite i te wairewa wai 2%, kia ata whakakorikoritia, kia inehia tona poiketanga me tona pumautanga ki te viscometer, me te ine i te pokey toharite mo nga wa e 3.He 11 te pokey o te tauira o te taakahu tarukino cellulose ether.8 mPa.
2.4 Te tono rahi
2.4.1 Te whirihoranga slurry
I whakaritea te slurry ki te 1000mL o te slurry me te hautanga papatipu o te 3.5%, ka oho riterite ki te whakaranu, katahi ka tuu ki roto i te kaukau wai ka whakamahana ki te 95°C mo te 1 haora.I taua wa ano, me mahara kia pai te hiri o te ipu tunu penupenu kia kore ai e piki ake te kukū o te slurry na te mimiti o te wai.
2.4.2 Ko te hanga i te slurry pH, miscibility me te COD
Whakaranuhia te hydroxypropyl methyl cellulose me te rahi o te māngaro hei whakarite i te slurry (1#~4#), ka whakataurite ki te slurry tātai PVA (0#) hei tātari i te pH, te koretake me te COD.Ko te miro polyester-cotton hanumi T/C65/3514.7 tex te rahi i runga i te miihini tauira tauira ESS1000, a ka tātarihia ana mahi rahi.
Ka kitea ko te hemp stalk cellulose ether me te rahi o te maaka motuhake 3 # ko te hanganga rahi tino pai: 25% hemp stalk cellulose ether, 65% te maaka kua whakarereke me te 10% FS-101.
Ko nga raraunga rahinga katoa e rite ana ki nga raraunga rahinga o te rahi PVA, e tohu ana he pai te mahinga o te rahi whakauru o te hydroxypropyl methylcellulose me te māngaro motuhake;ko tona pH he tata ki te koretake;hydroxypropyl methylcellulose and specific starch Ko te COD (17459.2 mg/L) o te maaka motuhake te rahi whakauru i tino iti iho i te rahi PVA (26448.0 mg/L), a he pai te mahi tiaki taiao.
3. Whakamutunga
Ko te tukanga whakaputa tino pai mo te whakarite hemp stalk cellulose ether-hydroxypropyl methylcellulose mo te rahinga e whai ake nei: he reactor whakakorikori pehanga teitei me te tere hurihuri o 240-350 r/min, he hautanga papatipu o te reitoi o 35%, me te ōwehenga kōpeketanga o alkali cellulose 2.4, te pāmahana methylation ko 75 ℃, me te hydroxypropylation pāmahana ko 50 ℃, ia mau tonu mo te 2 haora, te ōwehenga rōrahi wai o te methyl pūhaumāota me te propylene waikura ko 7:3, korehau, te pēhanga tauhohenga ko 2.0 MPa, Ko te isopropanol te diluent.
Hemp stalk cellulose ether i whakamahia hei whakakapi i te rahi PVA mo te rahinga, a, ko te ōwehenga rahi tino pai ko: 25% hemp stalk cellulose ether, 65% māngaro kua whakarerekētia me te 10% FS-101.Ko te pH o te slurry he 6.5 me te COD (17459.2 mg / L) he tino iti ake i te PVA slurry (26448.0 mg / L), e whakaatu ana i te pai o te mahi taiao.
Hemp stalk cellulose ether i whakamahia mo te rahinga hei utu mo te rahi PVA ki te rahinga o te miro polyester-cotton hanumi T/C 65/3514.7tex.He ōrite te taupū rahi.Ka taea e te hemp stalk cellulose ether me te maaka kua whakarereketia te rahi whakaurunga hei whakakapi i te rahi PVA.
Wā tuku: Feb-20-2023