difficulty to list data in angular datatable 4

As the title says, I can not load bank records into the PrimeNG dataTable.

No error messages appear in the VisualCode console, no error messages appear in the internet browser console, no error notifications appear in the code itself.

I think the problem should be in HTML, I need help finding out how to solve it, this is my code.

Service code;

import { Noticia } from './../core/model';

import { Http, Headers } from '@angular/http';
import { Injectable } from '@angular/core';

import { Observable } from 'rxjs/Observable';

import 'rxjs/add/operator/map';



@Injectable()
export class NoticiaService {

  noticiasUrl = 'http://localhost:8080/noticias';


  constructor(private http: Http) { }

  pesquisar(): Observable <Noticia[]> {
    return this.http.get('${this.noticiasUrl}')
      .map(response => response.json().content);

  }


}

Component code;

noticias = [];

  constructor(private noticiaService: NoticiaService) { }

  ngOnInit() {
     this.pesquisa();
  }


  pesquisa() {
      this.noticiaService.pesquisar()
      .subscribe(noticias => this.noticias = this.noticias);
  }

HTML code;

<div class="container">
  <div class="ui-g">



    <div class="ui-g-12 ui-fluid">
      <label>Descrição</label>
      <input pInputText type="text">
    </div>

    <div class="ui-g-12">
      <label style="display: block">Vencimento</label>
      <input pInputText type="text" style="width: 95px">

      <label>até</label>
      <input pInputText type="text" style="width: 95px">
    </div>

    <div class="ui-g-12">
      <button pButton type="submit" label="Pesquisar"></button>
    </div>

  </div>

  <div class="ui-g">
    <div class="ui-g-12">

      <p-dataTable [value]="noticias" [paginator]="true" [rows]="5"
      [responsive]="true">

   <p-column field="dataNoticia" header="Data da noticia" styleClass="col-data">
        <ng-template let-lanc="rowData" pTemplate="body">
          <span>{{ lanc.dataNoticia | date:'dd/MM/yyyy' }}</span>
        </ng-template>
      </p-column>
      <p-column field="titulo" header="Titulo"></p-column>
       <p-column field="font" header="Fonte" styleClass="col-valor"></p-column>
          <p-column styleClass="col-acoes">
              <ng-template let-lanc="rowData" pTemplate="body">
                <button pButton icon="fa-angle-double-right"
                pTooltip="Visualize" tooltipPosition="top"
                ></button>
              </ng-template>
            </p-column>
      </p-dataTable>

    </div>


  </div>

</div>